Move Doxygen docs to subdirectory (#16561)

7 files changed, 777 insertions, 0 deletions

diff --git a/docs/internals/defines.md b/docs/internals/defines.md
new file mode 100644
index 0000000000..fdcb553589
--- /dev/null
+++ b/docs/internals/defines.md
@@ -0,0 +1,78 @@
+# group `defines` {#group__defines}
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`define `[`SYSEX_BEGIN`](#group__defines_1ga1a3c39bb790dda8a368c4247caabcf79)            | 
+`define `[`SYSEX_END`](#group__defines_1ga753706d1d28e6f96d7caf1973e80feed)            | 
+`define `[`MIDI_STATUSMASK`](#group__defines_1gab78a1c818a5f5dab7a8946543f126c69)            | 
+`define `[`MIDI_CHANMASK`](#group__defines_1ga239edc0a6f8405d3a8f2804f1590b909)            | 
+`define `[`MIDI_CC`](#group__defines_1ga45f116a1daab76b3c930c2cecfaef215)            | 
+`define `[`MIDI_NOTEON`](#group__defines_1gafd416f27bf3590868c0c1f55c30be4c7)            | 
+`define `[`MIDI_NOTEOFF`](#group__defines_1gabed24bea2d989fd655e2ef2ad0765adc)            | 
+`define `[`MIDI_AFTERTOUCH`](#group__defines_1ga3a322d8cfd53576a2e167c1840551b0f)            | 
+`define `[`MIDI_PITCHBEND`](#group__defines_1gabcc799504e8064679bca03f232223af4)            | 
+`define `[`MIDI_PROGCHANGE`](#group__defines_1gaefb3f1595ffbb9db66b46c2c919a3d42)            | 
+`define `[`MIDI_CHANPRESSURE`](#group__defines_1gaeb3281cc7fcd0daade8ed3d2dfc33dbe)            | 
+`define `[`MIDI_CLOCK`](#group__defines_1gafa5e4e295aafd15ab7893344599b3b89)            | 
+`define `[`MIDI_TICK`](#group__defines_1ga3b99408ff864613765d4c3c2ceb52aa7)            | 
+`define `[`MIDI_START`](#group__defines_1ga8233631c85823aa546f932ad8975caa4)            | 
+`define `[`MIDI_CONTINUE`](#group__defines_1gab24430f0081e27215b0da84dd0ee745c)            | 
+`define `[`MIDI_STOP`](#group__defines_1ga3af9271d4b1f0d22904a0b055f48cf62)            | 
+`define `[`MIDI_ACTIVESENSE`](#group__defines_1gacd88ed42dba52bb4b2052c5656362677)            | 
+`define `[`MIDI_RESET`](#group__defines_1ga02947f30ca62dc332fdeb10c5868323b)            | 
+`define `[`MIDI_TC_QUARTERFRAME`](#group__defines_1gaaa072f33590e236d1bfd8f28e833ae31)            | 
+`define `[`MIDI_SONGPOSITION`](#group__defines_1ga412f6ed33a2150051374bee334ee1705)            | 
+`define `[`MIDI_SONGSELECT`](#group__defines_1gafcab254838b028365ae0259729e72c4e)            | 
+`define `[`MIDI_TUNEREQUEST`](#group__defines_1ga8100b907b8c0a84e58b1c53dcd9bd795)            | 
+`define `[`SYSEX_EDUMANUFID`](#group__defines_1ga5ef855ed955b00a2239ca16afbeb164f)            | 
+
+## Members
+
+#### `define `[`SYSEX_BEGIN`](#group__defines_1ga1a3c39bb790dda8a368c4247caabcf79) {#group__defines_1ga1a3c39bb790dda8a368c4247caabcf79}
+
+#### `define `[`SYSEX_END`](#group__defines_1ga753706d1d28e6f96d7caf1973e80feed) {#group__defines_1ga753706d1d28e6f96d7caf1973e80feed}
+
+#### `define `[`MIDI_STATUSMASK`](#group__defines_1gab78a1c818a5f5dab7a8946543f126c69) {#group__defines_1gab78a1c818a5f5dab7a8946543f126c69}
+
+#### `define `[`MIDI_CHANMASK`](#group__defines_1ga239edc0a6f8405d3a8f2804f1590b909) {#group__defines_1ga239edc0a6f8405d3a8f2804f1590b909}
+
+#### `define `[`MIDI_CC`](#group__defines_1ga45f116a1daab76b3c930c2cecfaef215) {#group__defines_1ga45f116a1daab76b3c930c2cecfaef215}
+
+#### `define `[`MIDI_NOTEON`](#group__defines_1gafd416f27bf3590868c0c1f55c30be4c7) {#group__defines_1gafd416f27bf3590868c0c1f55c30be4c7}
+
+#### `define `[`MIDI_NOTEOFF`](#group__defines_1gabed24bea2d989fd655e2ef2ad0765adc) {#group__defines_1gabed24bea2d989fd655e2ef2ad0765adc}
+
+#### `define `[`MIDI_AFTERTOUCH`](#group__defines_1ga3a322d8cfd53576a2e167c1840551b0f) {#group__defines_1ga3a322d8cfd53576a2e167c1840551b0f}
+
+#### `define `[`MIDI_PITCHBEND`](#group__defines_1gabcc799504e8064679bca03f232223af4) {#group__defines_1gabcc799504e8064679bca03f232223af4}
+
+#### `define `[`MIDI_PROGCHANGE`](#group__defines_1gaefb3f1595ffbb9db66b46c2c919a3d42) {#group__defines_1gaefb3f1595ffbb9db66b46c2c919a3d42}
+
+#### `define `[`MIDI_CHANPRESSURE`](#group__defines_1gaeb3281cc7fcd0daade8ed3d2dfc33dbe) {#group__defines_1gaeb3281cc7fcd0daade8ed3d2dfc33dbe}
+
+#### `define `[`MIDI_CLOCK`](#group__defines_1gafa5e4e295aafd15ab7893344599b3b89) {#group__defines_1gafa5e4e295aafd15ab7893344599b3b89}
+
+#### `define `[`MIDI_TICK`](#group__defines_1ga3b99408ff864613765d4c3c2ceb52aa7) {#group__defines_1ga3b99408ff864613765d4c3c2ceb52aa7}
+
+#### `define `[`MIDI_START`](#group__defines_1ga8233631c85823aa546f932ad8975caa4) {#group__defines_1ga8233631c85823aa546f932ad8975caa4}
+
+#### `define `[`MIDI_CONTINUE`](#group__defines_1gab24430f0081e27215b0da84dd0ee745c) {#group__defines_1gab24430f0081e27215b0da84dd0ee745c}
+
+#### `define `[`MIDI_STOP`](#group__defines_1ga3af9271d4b1f0d22904a0b055f48cf62) {#group__defines_1ga3af9271d4b1f0d22904a0b055f48cf62}
+
+#### `define `[`MIDI_ACTIVESENSE`](#group__defines_1gacd88ed42dba52bb4b2052c5656362677) {#group__defines_1gacd88ed42dba52bb4b2052c5656362677}
+
+#### `define `[`MIDI_RESET`](#group__defines_1ga02947f30ca62dc332fdeb10c5868323b) {#group__defines_1ga02947f30ca62dc332fdeb10c5868323b}
+
+#### `define `[`MIDI_TC_QUARTERFRAME`](#group__defines_1gaaa072f33590e236d1bfd8f28e833ae31) {#group__defines_1gaaa072f33590e236d1bfd8f28e833ae31}
+
+#### `define `[`MIDI_SONGPOSITION`](#group__defines_1ga412f6ed33a2150051374bee334ee1705) {#group__defines_1ga412f6ed33a2150051374bee334ee1705}
+
+#### `define `[`MIDI_SONGSELECT`](#group__defines_1gafcab254838b028365ae0259729e72c4e) {#group__defines_1gafcab254838b028365ae0259729e72c4e}
+
+#### `define `[`MIDI_TUNEREQUEST`](#group__defines_1ga8100b907b8c0a84e58b1c53dcd9bd795) {#group__defines_1ga8100b907b8c0a84e58b1c53dcd9bd795}
+
+#### `define `[`SYSEX_EDUMANUFID`](#group__defines_1ga5ef855ed955b00a2239ca16afbeb164f) {#group__defines_1ga5ef855ed955b00a2239ca16afbeb164f}
+
diff --git a/docs/internals/input_callback_reg.md b/docs/internals/input_callback_reg.md
new file mode 100644
index 0000000000..4ea132a83a
--- /dev/null
+++ b/docs/internals/input_callback_reg.md
@@ -0,0 +1,169 @@
+# group `input_callback_reg` {#group__input__callback__reg}
+
+These are the functions you use to register your input callbacks.
+
+The functions are called when the appropriate midi message is matched on the associated device's input.
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`public void `[`midi_register_cc_callback`](#group__input__callback__reg_1ga64ab672abbbe393c9c4a83110c8df718)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a control change message (cc) callback.
+`public void `[`midi_register_noteon_callback`](#group__input__callback__reg_1ga3962f276c17618923f1152779552103e)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a note on callback.
+`public void `[`midi_register_noteoff_callback`](#group__input__callback__reg_1gac847b66051bd6d53b762958be0ec4c6d)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a note off callback.
+`public void `[`midi_register_aftertouch_callback`](#group__input__callback__reg_1gaa95bc901bd9edff956a667c9a69dd01f)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register an after touch callback.
+`public void `[`midi_register_pitchbend_callback`](#group__input__callback__reg_1ga071a28f02ba14f53de219be70ebd9a48)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a pitch bend callback.
+`public void `[`midi_register_songposition_callback`](#group__input__callback__reg_1gaf2adfd79637f3553d8f26deb1ca22ed6)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)`            | Register a song position callback.
+`public void `[`midi_register_progchange_callback`](#group__input__callback__reg_1gae6ba1a35a4cde9bd15dd42f87401d127)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)`            | Register a program change callback.
+`public void `[`midi_register_chanpressure_callback`](#group__input__callback__reg_1ga39b31f1f4fb93917ce039b958f21b4f5)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)`            | Register a channel pressure callback.
+`public void `[`midi_register_songselect_callback`](#group__input__callback__reg_1gaf9aafc76a2dc4b9fdbb4106cbda6ce72)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)`            | Register a song select callback.
+`public void `[`midi_register_tc_quarterframe_callback`](#group__input__callback__reg_1ga0a119fada2becc628cb15d753b257e6e)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)`            | Register a tc quarter frame callback.
+`public void `[`midi_register_realtime_callback`](#group__input__callback__reg_1ga764f440e857b89084b1a07f9da2ff93a)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_one_byte_func_t func)`            | Register a realtime callback.
+`public void `[`midi_register_tunerequest_callback`](#group__input__callback__reg_1gae40ff3ce20bda79fef87da24b8321cb1)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_one_byte_func_t func)`            | Register a tune request callback.
+`public void `[`midi_register_sysex_callback`](#group__input__callback__reg_1ga63ce9631b025785c1848d0122d4c4c48)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_sysex_func_t func)`            | Register a sysex callback.
+`public void `[`midi_register_fallthrough_callback`](#group__input__callback__reg_1ga7ed189164aa9682862b3181153afbd94)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t func)`            | Register fall through callback.
+`public void `[`midi_register_catchall_callback`](#group__input__callback__reg_1ga9dbfed568d047a6cd05708f11fe39e99)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t func)`            | Register a catch all callback.
+
+## Members
+
+#### `public void `[`midi_register_cc_callback`](#group__input__callback__reg_1ga64ab672abbbe393c9c4a83110c8df718)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1ga64ab672abbbe393c9c4a83110c8df718}
+
+Register a control change message (cc) callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_noteon_callback`](#group__input__callback__reg_1ga3962f276c17618923f1152779552103e)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1ga3962f276c17618923f1152779552103e}
+
+Register a note on callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_noteoff_callback`](#group__input__callback__reg_1gac847b66051bd6d53b762958be0ec4c6d)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1gac847b66051bd6d53b762958be0ec4c6d}
+
+Register a note off callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_aftertouch_callback`](#group__input__callback__reg_1gaa95bc901bd9edff956a667c9a69dd01f)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1gaa95bc901bd9edff956a667c9a69dd01f}
+
+Register an after touch callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_pitchbend_callback`](#group__input__callback__reg_1ga071a28f02ba14f53de219be70ebd9a48)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1ga071a28f02ba14f53de219be70ebd9a48}
+
+Register a pitch bend callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_songposition_callback`](#group__input__callback__reg_1gaf2adfd79637f3553d8f26deb1ca22ed6)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_three_byte_func_t func)` {#group__input__callback__reg_1gaf2adfd79637f3553d8f26deb1ca22ed6}
+
+Register a song position callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_progchange_callback`](#group__input__callback__reg_1gae6ba1a35a4cde9bd15dd42f87401d127)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)` {#group__input__callback__reg_1gae6ba1a35a4cde9bd15dd42f87401d127}
+
+Register a program change callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_chanpressure_callback`](#group__input__callback__reg_1ga39b31f1f4fb93917ce039b958f21b4f5)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)` {#group__input__callback__reg_1ga39b31f1f4fb93917ce039b958f21b4f5}
+
+Register a channel pressure callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_songselect_callback`](#group__input__callback__reg_1gaf9aafc76a2dc4b9fdbb4106cbda6ce72)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)` {#group__input__callback__reg_1gaf9aafc76a2dc4b9fdbb4106cbda6ce72}
+
+Register a song select callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_tc_quarterframe_callback`](#group__input__callback__reg_1ga0a119fada2becc628cb15d753b257e6e)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_two_byte_func_t func)` {#group__input__callback__reg_1ga0a119fada2becc628cb15d753b257e6e}
+
+Register a tc quarter frame callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_realtime_callback`](#group__input__callback__reg_1ga764f440e857b89084b1a07f9da2ff93a)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_one_byte_func_t func)` {#group__input__callback__reg_1ga764f440e857b89084b1a07f9da2ff93a}
+
+Register a realtime callback.
+
+The callback will be called for all of the real time message types.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_tunerequest_callback`](#group__input__callback__reg_1gae40ff3ce20bda79fef87da24b8321cb1)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_one_byte_func_t func)` {#group__input__callback__reg_1gae40ff3ce20bda79fef87da24b8321cb1}
+
+Register a tune request callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_sysex_callback`](#group__input__callback__reg_1ga63ce9631b025785c1848d0122d4c4c48)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_sysex_func_t func)` {#group__input__callback__reg_1ga63ce9631b025785c1848d0122d4c4c48}
+
+Register a sysex callback.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_fallthrough_callback`](#group__input__callback__reg_1ga7ed189164aa9682862b3181153afbd94)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t func)` {#group__input__callback__reg_1ga7ed189164aa9682862b3181153afbd94}
+
+Register fall through callback.
+
+This is only called if a more specific callback is not matched and called. For instance, if you don't register a note on callback but you get a note on message the fall through callback will be called, if it is registered.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
+#### `public void `[`midi_register_catchall_callback`](#group__input__callback__reg_1ga9dbfed568d047a6cd05708f11fe39e99)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t func)` {#group__input__callback__reg_1ga9dbfed568d047a6cd05708f11fe39e99}
+
+Register a catch all callback.
+
+If registered, the catch all callback is called for every message that is matched, even if a more specific or the fallthrough callback is registered.
+
+#### Parameters
+* `device` the device associate with 
+
+* `func` the callback function to register
+
diff --git a/docs/internals/midi_device.md b/docs/internals/midi_device.md
new file mode 100644
index 0000000000..5b57abd454
--- /dev/null
+++ b/docs/internals/midi_device.md
@@ -0,0 +1,143 @@
+# group `midi_device` {#group__midi__device}
+
+You use the functions when you are implementing your own midi device.
+
+You set a send function to actually send bytes via your device, this method is called when you call a send function with this device, for instance midi_send_cc
+
+You use the midi_device_input to process input data from the device and pass it through the device's associated callbacks.
+
+You use the midi_device_set_pre_input_process_func if you want to have a function called at the beginning of the device's process function, generally to poll for input and pass that into midi_device_input
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`define `[`MIDI_INPUT_QUEUE_LENGTH`](#group__midi__device_1ga4aaa419caebdca2bbdfc1331e79781a8)            | 
+`enum `[`input_state_t`](#group__midi__device_1gac203e877d3df4275ceb8e7180a61f621)            | 
+`public void `[`midi_device_input`](#group__midi__device_1gad8d3db8eb35d9cfa51ef036a0a9d70db)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t cnt,uint8_t * input)`            | Process input bytes. This function parses bytes and calls the appropriate callbacks associated with the given device. You use this function if you are creating a custom device and you want to have midi input.
+`public void `[`midi_device_set_send_func`](#group__midi__device_1ga59f5a46bdd4452f186cc73d9e96d4673)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t send_func)`            | Set the callback function that will be used for sending output data bytes. This is only used if you're creating a custom device. You'll most likely want the callback function to disable interrupts so that you can call the various midi send functions without worrying about locking.
+`public void `[`midi_device_set_pre_input_process_func`](#group__midi__device_1ga4de0841b87c04fc23cb56b6451f33b69)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_no_byte_func_t pre_process_func)`            | Set a callback which is called at the beginning of the midi_device_process call. This can be used to poll for input data and send the data through the midi_device_input function. You'll probably only use this if you're creating a custom device.
+`struct `[`_midi_device`](docs/api_midi_device.md#struct__midi__device) | This structure represents the input and output functions and processing data for a midi device.
+
+## Members
+
+#### `define `[`MIDI_INPUT_QUEUE_LENGTH`](#group__midi__device_1ga4aaa419caebdca2bbdfc1331e79781a8) {#group__midi__device_1ga4aaa419caebdca2bbdfc1331e79781a8}
+
+#### `enum `[`input_state_t`](#group__midi__device_1gac203e877d3df4275ceb8e7180a61f621) {#group__midi__device_1gac203e877d3df4275ceb8e7180a61f621}
+
+ Values                         | Descriptions                                
+--------------------------------|---------------------------------------------
+IDLE            | 
+ONE_BYTE_MESSAGE            | 
+TWO_BYTE_MESSAGE            | 
+THREE_BYTE_MESSAGE            | 
+SYSEX_MESSAGE            | 
+
+#### `public void `[`midi_device_input`](#group__midi__device_1gad8d3db8eb35d9cfa51ef036a0a9d70db)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t cnt,uint8_t * input)` {#group__midi__device_1gad8d3db8eb35d9cfa51ef036a0a9d70db}
+
+Process input bytes. This function parses bytes and calls the appropriate callbacks associated with the given device. You use this function if you are creating a custom device and you want to have midi input.
+
+#### Parameters
+* `device` the midi device to associate the input with 
+
+* `cnt` the number of bytes you are processing 
+
+* `input` the bytes to process
+
+#### `public void `[`midi_device_set_send_func`](#group__midi__device_1ga59f5a46bdd4452f186cc73d9e96d4673)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_var_byte_func_t send_func)` {#group__midi__device_1ga59f5a46bdd4452f186cc73d9e96d4673}
+
+Set the callback function that will be used for sending output data bytes. This is only used if you're creating a custom device. You'll most likely want the callback function to disable interrupts so that you can call the various midi send functions without worrying about locking.
+
+#### Parameters
+* `device` the midi device to associate this callback with 
+
+* `send_func` the callback function that will do the sending
+
+#### `public void `[`midi_device_set_pre_input_process_func`](#group__midi__device_1ga4de0841b87c04fc23cb56b6451f33b69)`(`[`MidiDevice`](#struct__midi__device)` * device,midi_no_byte_func_t pre_process_func)` {#group__midi__device_1ga4de0841b87c04fc23cb56b6451f33b69}
+
+Set a callback which is called at the beginning of the midi_device_process call. This can be used to poll for input data and send the data through the midi_device_input function. You'll probably only use this if you're creating a custom device.
+
+#### Parameters
+* `device` the midi device to associate this callback with 
+
+* `midi_no_byte_func_t` the actual callback function
+
+# struct `_midi_device` {#struct__midi__device}
+
+This structure represents the input and output functions and processing data for a midi device.
+
+A device can represent an actual physical device [serial port, usb port] or something virtual. You should not need to modify this structure directly.
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`public midi_var_byte_func_t `[`send_func`](docs/api_midi_device.md#struct__midi__device_1a25d4c94b4bbccd5b98f1032b469f3ff9) | 
+`public midi_three_byte_func_t `[`input_cc_callback`](docs/api_midi_device.md#struct__midi__device_1a6da5236c1bc73877728df92d213a78d1) | 
+`public midi_three_byte_func_t `[`input_noteon_callback`](docs/api_midi_device.md#struct__midi__device_1aa10b15cf1a7fb825a5df0d2abbe34a1c) | 
+`public midi_three_byte_func_t `[`input_noteoff_callback`](docs/api_midi_device.md#struct__midi__device_1aaf290043078534d3a5a0ea4c840eba84) | 
+`public midi_three_byte_func_t `[`input_aftertouch_callback`](docs/api_midi_device.md#struct__midi__device_1acb0b4901c545cec4b28b126f2d8c315f) | 
+`public midi_three_byte_func_t `[`input_pitchbend_callback`](docs/api_midi_device.md#struct__midi__device_1a305fea672caeb996f2233bf8cd2bef18) | 
+`public midi_three_byte_func_t `[`input_songposition_callback`](docs/api_midi_device.md#struct__midi__device_1a5f3f13638b3fef3fc561ed1bf301d586) | 
+`public midi_two_byte_func_t `[`input_progchange_callback`](docs/api_midi_device.md#struct__midi__device_1adaf1da617c9a10a9dcad00ab1959d3da) | 
+`public midi_two_byte_func_t `[`input_chanpressure_callback`](docs/api_midi_device.md#struct__midi__device_1ab7ca2925c539915d43974eff604d85f7) | 
+`public midi_two_byte_func_t `[`input_songselect_callback`](docs/api_midi_device.md#struct__midi__device_1a89bed8a5a55376120cfc0a62b42f057f) | 
+`public midi_two_byte_func_t `[`input_tc_quarterframe_callback`](docs/api_midi_device.md#struct__midi__device_1ad9813e75d22e284f9f65a907d20600f0) | 
+`public midi_one_byte_func_t `[`input_realtime_callback`](docs/api_midi_device.md#struct__midi__device_1a9448eba4afb7e43650434748db3777be) | 
+`public midi_one_byte_func_t `[`input_tunerequest_callback`](docs/api_midi_device.md#struct__midi__device_1a0cb8fd53e00cf1d4202d4fa04d038e8d) | 
+`public midi_sysex_func_t `[`input_sysex_callback`](docs/api_midi_device.md#struct__midi__device_1afff9a0ce641762aaef24c1e6953ec9a2) | 
+`public midi_var_byte_func_t `[`input_fallthrough_callback`](docs/api_midi_device.md#struct__midi__device_1abb974ec6d734001b4a0e370f292be503) | 
+`public midi_var_byte_func_t `[`input_catchall_callback`](docs/api_midi_device.md#struct__midi__device_1aae0d535129d4fd650edc98eb3f7584f8) | 
+`public midi_no_byte_func_t `[`pre_input_process_callback`](docs/api_midi_device.md#struct__midi__device_1aeb0bb8923d66c23d874e177dc4265754) | 
+`public uint8_t `[`input_buffer`](docs/api_midi_device.md#struct__midi__device_1a7c5684857d6af4ebc4dc12da27bd6b2a) | 
+`public input_state_t `[`input_state`](docs/api_midi_device.md#struct__midi__device_1a69a687d2d1c449ec15a11c07a5722e39) | 
+`public uint16_t `[`input_count`](docs/api_midi_device.md#struct__midi__device_1a68dea8e7b6151e89c85c95caa612ee5d) | 
+`public uint8_t `[`input_queue_data`](docs/api_midi_device.md#struct__midi__device_1ada41de021135dc423abedcbb30f366ff) | 
+`public `[`byteQueue_t`](#structbyte_queue__t)` `[`input_queue`](#struct__midi__device_1a49c8538a8a02193c58e28a56eb695d8f) | 
+
+## Members
+
+#### `public midi_var_byte_func_t `[`send_func`](docs/api_midi_device.md#struct__midi__device_1a25d4c94b4bbccd5b98f1032b469f3ff9) {#struct__midi__device_1a25d4c94b4bbccd5b98f1032b469f3ff9}
+
+#### `public midi_three_byte_func_t `[`input_cc_callback`](docs/api_midi_device.md#struct__midi__device_1a6da5236c1bc73877728df92d213a78d1) {#struct__midi__device_1a6da5236c1bc73877728df92d213a78d1}
+
+#### `public midi_three_byte_func_t `[`input_noteon_callback`](docs/api_midi_device.md#struct__midi__device_1aa10b15cf1a7fb825a5df0d2abbe34a1c) {#struct__midi__device_1aa10b15cf1a7fb825a5df0d2abbe34a1c}
+
+#### `public midi_three_byte_func_t `[`input_noteoff_callback`](docs/api_midi_device.md#struct__midi__device_1aaf290043078534d3a5a0ea4c840eba84) {#struct__midi__device_1aaf290043078534d3a5a0ea4c840eba84}
+
+#### `public midi_three_byte_func_t `[`input_aftertouch_callback`](docs/api_midi_device.md#struct__midi__device_1acb0b4901c545cec4b28b126f2d8c315f) {#struct__midi__device_1acb0b4901c545cec4b28b126f2d8c315f}
+
+#### `public midi_three_byte_func_t `[`input_pitchbend_callback`](docs/api_midi_device.md#struct__midi__device_1a305fea672caeb996f2233bf8cd2bef18) {#struct__midi__device_1a305fea672caeb996f2233bf8cd2bef18}
+
+#### `public midi_three_byte_func_t `[`input_songposition_callback`](docs/api_midi_device.md#struct__midi__device_1a5f3f13638b3fef3fc561ed1bf301d586) {#struct__midi__device_1a5f3f13638b3fef3fc561ed1bf301d586}
+
+#### `public midi_two_byte_func_t `[`input_progchange_callback`](docs/api_midi_device.md#struct__midi__device_1adaf1da617c9a10a9dcad00ab1959d3da) {#struct__midi__device_1adaf1da617c9a10a9dcad00ab1959d3da}
+
+#### `public midi_two_byte_func_t `[`input_chanpressure_callback`](docs/api_midi_device.md#struct__midi__device_1ab7ca2925c539915d43974eff604d85f7) {#struct__midi__device_1ab7ca2925c539915d43974eff604d85f7}
+
+#### `public midi_two_byte_func_t `[`input_songselect_callback`](docs/api_midi_device.md#struct__midi__device_1a89bed8a5a55376120cfc0a62b42f057f) {#struct__midi__device_1a89bed8a5a55376120cfc0a62b42f057f}
+
+#### `public midi_two_byte_func_t `[`input_tc_quarterframe_callback`](docs/api_midi_device.md#struct__midi__device_1ad9813e75d22e284f9f65a907d20600f0) {#struct__midi__device_1ad9813e75d22e284f9f65a907d20600f0}
+
+#### `public midi_one_byte_func_t `[`input_realtime_callback`](docs/api_midi_device.md#struct__midi__device_1a9448eba4afb7e43650434748db3777be) {#struct__midi__device_1a9448eba4afb7e43650434748db3777be}
+
+#### `public midi_one_byte_func_t `[`input_tunerequest_callback`](docs/api_midi_device.md#struct__midi__device_1a0cb8fd53e00cf1d4202d4fa04d038e8d) {#struct__midi__device_1a0cb8fd53e00cf1d4202d4fa04d038e8d}
+
+#### `public midi_sysex_func_t `[`input_sysex_callback`](docs/api_midi_device.md#struct__midi__device_1afff9a0ce641762aaef24c1e6953ec9a2) {#struct__midi__device_1afff9a0ce641762aaef24c1e6953ec9a2}
+
+#### `public midi_var_byte_func_t `[`input_fallthrough_callback`](docs/api_midi_device.md#struct__midi__device_1abb974ec6d734001b4a0e370f292be503) {#struct__midi__device_1abb974ec6d734001b4a0e370f292be503}
+
+#### `public midi_var_byte_func_t `[`input_catchall_callback`](docs/api_midi_device.md#struct__midi__device_1aae0d535129d4fd650edc98eb3f7584f8) {#struct__midi__device_1aae0d535129d4fd650edc98eb3f7584f8}
+
+#### `public midi_no_byte_func_t `[`pre_input_process_callback`](docs/api_midi_device.md#struct__midi__device_1aeb0bb8923d66c23d874e177dc4265754) {#struct__midi__device_1aeb0bb8923d66c23d874e177dc4265754}
+
+#### `public uint8_t `[`input_buffer`](docs/api_midi_device.md#struct__midi__device_1a7c5684857d6af4ebc4dc12da27bd6b2a) {#struct__midi__device_1a7c5684857d6af4ebc4dc12da27bd6b2a}
+
+#### `public input_state_t `[`input_state`](docs/api_midi_device.md#struct__midi__device_1a69a687d2d1c449ec15a11c07a5722e39) {#struct__midi__device_1a69a687d2d1c449ec15a11c07a5722e39}
+
+#### `public uint16_t `[`input_count`](docs/api_midi_device.md#struct__midi__device_1a68dea8e7b6151e89c85c95caa612ee5d) {#struct__midi__device_1a68dea8e7b6151e89c85c95caa612ee5d}
+
+#### `public uint8_t `[`input_queue_data`](docs/api_midi_device.md#struct__midi__device_1ada41de021135dc423abedcbb30f366ff) {#struct__midi__device_1ada41de021135dc423abedcbb30f366ff}
+
+#### `public `[`byteQueue_t`](#structbyte_queue__t)` `[`input_queue`](#struct__midi__device_1a49c8538a8a02193c58e28a56eb695d8f) {#struct__midi__device_1a49c8538a8a02193c58e28a56eb695d8f}
+
diff --git a/docs/internals/midi_device_setup_process.md b/docs/internals/midi_device_setup_process.md
new file mode 100644
index 0000000000..ae82197c5c
--- /dev/null
+++ b/docs/internals/midi_device_setup_process.md
@@ -0,0 +1,31 @@
+# group `midi_device_setup_process` {#group__midi__device__setup__process}
+
+These are method that you must use to initialize and run a device.
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`public void `[`midi_device_init`](#group__midi__device__setup__process_1gaf29deddc94ea98a59daa0bde1aefd9d9)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Initialize a device.
+`public void `[`midi_device_process`](#group__midi__device__setup__process_1gaa3d5993d0e998a1b59bbf5ab9c7b492b)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Process input data.
+
+## Members
+
+#### `public void `[`midi_device_init`](#group__midi__device__setup__process_1gaf29deddc94ea98a59daa0bde1aefd9d9)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__midi__device__setup__process_1gaf29deddc94ea98a59daa0bde1aefd9d9}
+
+Initialize a device.
+
+You must call this before using the device in question.
+
+#### Parameters
+* `device` the device to initialize
+
+#### `public void `[`midi_device_process`](#group__midi__device__setup__process_1gaa3d5993d0e998a1b59bbf5ab9c7b492b)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__midi__device__setup__process_1gaa3d5993d0e998a1b59bbf5ab9c7b492b}
+
+Process input data.
+
+This method drives the input processing, you must call this method frequently if you expect to have your input callbacks called.
+
+#### Parameters
+* `device` the device to process
+
diff --git a/docs/internals/midi_util.md b/docs/internals/midi_util.md
new file mode 100644
index 0000000000..97821bd180
--- /dev/null
+++ b/docs/internals/midi_util.md
@@ -0,0 +1,54 @@
+# group `midi_util` {#group__midi__util}
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`enum `[`midi_packet_length_t`](#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e)            | An enumeration of the possible packet length values.
+`public bool `[`midi_is_statusbyte`](#group__midi__util_1ga12e3b42ff9cbb4b4f2bc455fc8743ee5)`(uint8_t theByte)`            | Test to see if the byte given is a status byte.
+`public bool `[`midi_is_realtime`](#group__midi__util_1gad2f52c363e34a8000d80c983c324e2d7)`(uint8_t theByte)`            | Test to see if the byte given is a realtime message.
+`public `[`midi_packet_length_t`](#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e)` `[`midi_packet_length`](#group__midi__util_1gaa168b43af6ae9de0debce1625e4b8175)`(uint8_t status)`            | Find the length of the packet associated with the status byte given.
+
+## Members
+
+#### `enum `[`midi_packet_length_t`](#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e) {#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e}
+
+ Values                         | Descriptions                                
+--------------------------------|---------------------------------------------
+UNDEFINED            | 
+ONE            | 
+TWO            | 
+THREE            | 
+
+An enumeration of the possible packet length values.
+
+#### `public bool `[`midi_is_statusbyte`](#group__midi__util_1ga12e3b42ff9cbb4b4f2bc455fc8743ee5)`(uint8_t theByte)` {#group__midi__util_1ga12e3b42ff9cbb4b4f2bc455fc8743ee5}
+
+Test to see if the byte given is a status byte.
+
+#### Parameters
+* `theByte` the byte to test 
+
+#### Returns
+true if the byte given is a midi status byte
+
+#### `public bool `[`midi_is_realtime`](#group__midi__util_1gad2f52c363e34a8000d80c983c324e2d7)`(uint8_t theByte)` {#group__midi__util_1gad2f52c363e34a8000d80c983c324e2d7}
+
+Test to see if the byte given is a realtime message.
+
+#### Parameters
+* `theByte` the byte to test 
+
+#### Returns
+true if it is a realtime message, false otherwise
+
+#### `public `[`midi_packet_length_t`](#group__midi__util_1gae29ff56aee2b430ffe53933b97e5e79e)` `[`midi_packet_length`](#group__midi__util_1gaa168b43af6ae9de0debce1625e4b8175)`(uint8_t status)` {#group__midi__util_1gaa168b43af6ae9de0debce1625e4b8175}
+
+Find the length of the packet associated with the status byte given.
+
+#### Parameters
+* `status` the status byte 
+
+#### Returns
+the length of the packet, will return UNDEFINED if the byte is not a status byte or if it is a sysex status byte
+
diff --git a/docs/internals/send_functions.md b/docs/internals/send_functions.md
new file mode 100644
index 0000000000..b331508008
--- /dev/null
+++ b/docs/internals/send_functions.md
@@ -0,0 +1,241 @@
+# group `send_functions` {#group__send__functions}
+
+These are the functions you use to send midi data through a device.
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`public void `[`midi_send_cc`](#group__send__functions_1gaaf884811c92df405ca8fe1a00082f960)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t val)`            | Send a control change message (cc) via the given device.
+`public void `[`midi_send_noteon`](#group__send__functions_1ga467bcf46dbf03ec269ce565b46bc2775)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t vel)`            | Send a note on message via the given device.
+`public void `[`midi_send_noteoff`](#group__send__functions_1gaedb7d8805425eef5d47d57ddcb4c7a49)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t vel)`            | Send a note off message via the given device.
+`public void `[`midi_send_aftertouch`](#group__send__functions_1ga0014847571317a0e34b2ef46a6bc584f)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t note_num,uint8_t amt)`            | Send an after touch message via the given device.
+`public void `[`midi_send_pitchbend`](#group__send__functions_1gae5a4a1e71611e7534be80af9ce3d3491)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,int16_t amt)`            | Send a pitch bend message via the given device.
+`public void `[`midi_send_programchange`](#group__send__functions_1ga7b15588ef25e5e1ff09c2afc3151ce86)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num)`            | Send a program change message via the given device.
+`public void `[`midi_send_channelpressure`](#group__send__functions_1gaf23e69fdf812e89c0036f51f88ab2e1b)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t amt)`            | Send a channel pressure message via the given device.
+`public void `[`midi_send_clock`](#group__send__functions_1ga4e1b11a7cdb0875f6e03ce7c79c581aa)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a clock message via the given device.
+`public void `[`midi_send_tick`](#group__send__functions_1ga2b43c7d433d940c5b907595aac947972)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a tick message via the given device.
+`public void `[`midi_send_start`](#group__send__functions_1ga1569749a8d58ccc56789289d7c7245cc)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a start message via the given device.
+`public void `[`midi_send_continue`](#group__send__functions_1gaed5dc29d754a27372e89ab8bc20ee120)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a continue message via the given device.
+`public void `[`midi_send_stop`](#group__send__functions_1ga026e1a620276cb653ac501aa0d12a988)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a stop message via the given device.
+`public void `[`midi_send_activesense`](#group__send__functions_1ga9b6e4c6ce4719d2604187b325620db37)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send an active sense message via the given device.
+`public void `[`midi_send_reset`](#group__send__functions_1ga3671e39a6d93ca9568fc493001af1b1b)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a reset message via the given device.
+`public void `[`midi_send_tcquarterframe`](#group__send__functions_1ga5b85639910eec280bb744c934d0fd45a)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t time)`            | Send a tc quarter frame message via the given device.
+`public void `[`midi_send_songposition`](#group__send__functions_1gab1c9eeef3b57a8cd2e6128d18e85eb7f)`(`[`MidiDevice`](#struct__midi__device)` * device,uint16_t pos)`            | Send a song position message via the given device.
+`public void `[`midi_send_songselect`](#group__send__functions_1ga42de7838ba70d949af9a50f9facc3c50)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t song)`            | Send a song select message via the given device.
+`public void `[`midi_send_tunerequest`](#group__send__functions_1ga8db6c7e04d48e4d2266dd59118ca0656)`(`[`MidiDevice`](#struct__midi__device)` * device)`            | Send a tune request message via the given device.
+`public void `[`midi_send_byte`](#group__send__functions_1ga857e85eb90b288385642d4d991e09881)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t b)`            | Send a byte via the given device.
+`public void `[`midi_send_data`](#group__send__functions_1ga36e2f2e45369d911b76969361679054b)`(`[`MidiDevice`](#struct__midi__device)` * device,uint16_t count,uint8_t byte0,uint8_t byte1,uint8_t byte2)`            | Send up to 3 bytes of data.
+`public void `[`midi_send_array`](#group__send__functions_1ga245243cb1da18d2cea18d4b18d846ead)`(`[`MidiDevice`](#struct__midi__device)` * device,uint16_t count,uint8_t * array)`            | Send an array of formatted midi data.
+
+## Members
+
+#### `public void `[`midi_send_cc`](#group__send__functions_1gaaf884811c92df405ca8fe1a00082f960)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t val)` {#group__send__functions_1gaaf884811c92df405ca8fe1a00082f960}
+
+Send a control change message (cc) via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `num` the cc num 
+
+* `val` the value of that cc num
+
+#### `public void `[`midi_send_noteon`](#group__send__functions_1ga467bcf46dbf03ec269ce565b46bc2775)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t vel)` {#group__send__functions_1ga467bcf46dbf03ec269ce565b46bc2775}
+
+Send a note on message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `num` the note number 
+
+* `vel` the note velocity
+
+#### `public void `[`midi_send_noteoff`](#group__send__functions_1gaedb7d8805425eef5d47d57ddcb4c7a49)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num,uint8_t vel)` {#group__send__functions_1gaedb7d8805425eef5d47d57ddcb4c7a49}
+
+Send a note off message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `num` the note number 
+
+* `vel` the note velocity
+
+#### `public void `[`midi_send_aftertouch`](#group__send__functions_1ga0014847571317a0e34b2ef46a6bc584f)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t note_num,uint8_t amt)` {#group__send__functions_1ga0014847571317a0e34b2ef46a6bc584f}
+
+Send an after touch message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `note_num` the note number 
+
+* `amt` the after touch amount
+
+#### `public void `[`midi_send_pitchbend`](#group__send__functions_1gae5a4a1e71611e7534be80af9ce3d3491)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,int16_t amt)` {#group__send__functions_1gae5a4a1e71611e7534be80af9ce3d3491}
+
+Send a pitch bend message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `amt` the bend amount range: -8192..8191, 0 means no bend
+
+#### `public void `[`midi_send_programchange`](#group__send__functions_1ga7b15588ef25e5e1ff09c2afc3151ce86)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t num)` {#group__send__functions_1ga7b15588ef25e5e1ff09c2afc3151ce86}
+
+Send a program change message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `num` the program to change to
+
+#### `public void `[`midi_send_channelpressure`](#group__send__functions_1gaf23e69fdf812e89c0036f51f88ab2e1b)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t chan,uint8_t amt)` {#group__send__functions_1gaf23e69fdf812e89c0036f51f88ab2e1b}
+
+Send a channel pressure message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `chan` the channel to send on, 0-15 
+
+* `amt` the amount of channel pressure
+
+#### `public void `[`midi_send_clock`](#group__send__functions_1ga4e1b11a7cdb0875f6e03ce7c79c581aa)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__send__functions_1ga4e1b11a7cdb0875f6e03ce7c79c581aa}
+
+Send a clock message via the given device.
+
+#### Parameters
+* `device` the device to use for sending
+
+#### `public void `[`midi_send_tick`](#group__send__functions_1ga2b43c7d433d940c5b907595aac947972)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__send__functions_1ga2b43c7d433d940c5b907595aac947972}
+
+Send a tick message via the given device.
+
+#### Parameters
+* `device` the device to use for sending
+
+#### `public void `[`midi_send_start`](#group__send__functions_1ga1569749a8d58ccc56789289d7c7245cc)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__send__functions_1ga1569749a8d58ccc56789289d7c7245cc}
+
+Send a start message via the given device.
+
+#### Parameters
+* `device` the device to use for sending
+
+#### `public void `[`midi_send_continue`](#group__send__functions_1gaed5dc29d754a27372e89ab8bc20ee120)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__send__functions_1gaed5dc29d754a27372e89ab8bc20ee120}
+
+Send a continue message via the given device.
+
+#### Parameters
+* `device` the device to use for sending
+
+#### `public void `[`midi_send_stop`](#group__send__functions_1ga026e1a620276cb653ac501aa0d12a988)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__send__functions_1ga026e1a620276cb653ac501aa0d12a988}
+
+Send a stop message via the given device.
+
+#### Parameters
+* `device` the device to use for sending
+
+#### `public void `[`midi_send_activesense`](#group__send__functions_1ga9b6e4c6ce4719d2604187b325620db37)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__send__functions_1ga9b6e4c6ce4719d2604187b325620db37}
+
+Send an active sense message via the given device.
+
+#### Parameters
+* `device` the device to use for sending
+
+#### `public void `[`midi_send_reset`](#group__send__functions_1ga3671e39a6d93ca9568fc493001af1b1b)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__send__functions_1ga3671e39a6d93ca9568fc493001af1b1b}
+
+Send a reset message via the given device.
+
+#### Parameters
+* `device` the device to use for sending
+
+#### `public void `[`midi_send_tcquarterframe`](#group__send__functions_1ga5b85639910eec280bb744c934d0fd45a)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t time)` {#group__send__functions_1ga5b85639910eec280bb744c934d0fd45a}
+
+Send a tc quarter frame message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `time` the time of this quarter frame, range 0..16383
+
+#### `public void `[`midi_send_songposition`](#group__send__functions_1gab1c9eeef3b57a8cd2e6128d18e85eb7f)`(`[`MidiDevice`](#struct__midi__device)` * device,uint16_t pos)` {#group__send__functions_1gab1c9eeef3b57a8cd2e6128d18e85eb7f}
+
+Send a song position message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `pos` the song position
+
+#### `public void `[`midi_send_songselect`](#group__send__functions_1ga42de7838ba70d949af9a50f9facc3c50)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t song)` {#group__send__functions_1ga42de7838ba70d949af9a50f9facc3c50}
+
+Send a song select message via the given device.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `song` the song to select
+
+#### `public void `[`midi_send_tunerequest`](#group__send__functions_1ga8db6c7e04d48e4d2266dd59118ca0656)`(`[`MidiDevice`](#struct__midi__device)` * device)` {#group__send__functions_1ga8db6c7e04d48e4d2266dd59118ca0656}
+
+Send a tune request message via the given device.
+
+#### Parameters
+* `device` the device to use for sending
+
+#### `public void `[`midi_send_byte`](#group__send__functions_1ga857e85eb90b288385642d4d991e09881)`(`[`MidiDevice`](#struct__midi__device)` * device,uint8_t b)` {#group__send__functions_1ga857e85eb90b288385642d4d991e09881}
+
+Send a byte via the given device.
+
+This is a generic method for sending data via the given midi device. This would be useful for sending sysex data or messages that are not implemented in this API, if there are any. Please contact the author if you find some so we can add them.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `b` the byte to send
+
+#### `public void `[`midi_send_data`](#group__send__functions_1ga36e2f2e45369d911b76969361679054b)`(`[`MidiDevice`](#struct__midi__device)` * device,uint16_t count,uint8_t byte0,uint8_t byte1,uint8_t byte2)` {#group__send__functions_1ga36e2f2e45369d911b76969361679054b}
+
+Send up to 3 bytes of data.
+
+% 4 is applied to count so that you can use this to pass sysex through
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `count` the count of bytes to send, %4 is applied 
+
+* `byte0` the first byte 
+
+* `byte1` the second byte, ignored if cnt % 4 != 2 
+
+* `byte2` the third byte, ignored if cnt % 4 != 3
+
+#### `public void `[`midi_send_array`](#group__send__functions_1ga245243cb1da18d2cea18d4b18d846ead)`(`[`MidiDevice`](#struct__midi__device)` * device,uint16_t count,uint8_t * array)` {#group__send__functions_1ga245243cb1da18d2cea18d4b18d846ead}
+
+Send an array of formatted midi data.
+
+Can be used for sysex.
+
+#### Parameters
+* `device` the device to use for sending 
+
+* `count` the count of bytes to send 
+
+* `array` the array of bytes
+
diff --git a/docs/internals/sysex_tools.md b/docs/internals/sysex_tools.md
new file mode 100644
index 0000000000..55dbe9e164
--- /dev/null
+++ b/docs/internals/sysex_tools.md
@@ -0,0 +1,61 @@
+# group `sysex_tools` {#group__sysex__tools}
+
+## Summary
+
+ Members                        | Descriptions                                
+--------------------------------|---------------------------------------------
+`public uint16_t `[`sysex_encoded_length`](#group__sysex__tools_1ga061e5607030412d6e62e2390d8013f0a)`(uint16_t decoded_length)`            | Compute the length of a message after it is encoded.
+`public uint16_t `[`sysex_decoded_length`](#group__sysex__tools_1ga121fc227d3acc1c0ea08c9a5c26fa3b0)`(uint16_t encoded_length)`            | Compute the length of a message after it is decoded.
+`public uint16_t `[`sysex_encode`](#group__sysex__tools_1ga54d77f8d32f92a6f329daefa2b314742)`(uint8_t * encoded,const uint8_t * source,uint16_t length)`            | Encode data so that it can be transmitted safely in a sysex message.
+`public uint16_t `[`sysex_decode`](#group__sysex__tools_1gaaad1d9ba2d5eca709a0ab4ba40662229)`(uint8_t * decoded,const uint8_t * source,uint16_t length)`            | Decode encoded data.
+
+## Members
+
+#### `public uint16_t `[`sysex_encoded_length`](#group__sysex__tools_1ga061e5607030412d6e62e2390d8013f0a)`(uint16_t decoded_length)` {#group__sysex__tools_1ga061e5607030412d6e62e2390d8013f0a}
+
+Compute the length of a message after it is encoded.
+
+#### Parameters
+* `decoded_length` The length, in bytes, of the message to encode.
+
+#### Returns
+The length, in bytes, of the message after encodeing.
+
+#### `public uint16_t `[`sysex_decoded_length`](#group__sysex__tools_1ga121fc227d3acc1c0ea08c9a5c26fa3b0)`(uint16_t encoded_length)` {#group__sysex__tools_1ga121fc227d3acc1c0ea08c9a5c26fa3b0}
+
+Compute the length of a message after it is decoded.
+
+#### Parameters
+* `encoded_length` The length, in bytes, of the encoded message.
+
+#### Returns
+The length, in bytes, of the message after it is decoded.
+
+#### `public uint16_t `[`sysex_encode`](#group__sysex__tools_1ga54d77f8d32f92a6f329daefa2b314742)`(uint8_t * encoded,const uint8_t * source,uint16_t length)` {#group__sysex__tools_1ga54d77f8d32f92a6f329daefa2b314742}
+
+Encode data so that it can be transmitted safely in a sysex message.
+
+#### Parameters
+* `encoded` The output data buffer, must be at least sysex_encoded_length(length) bytes long. 
+
+* `source` The input buffer of data to be encoded. 
+
+* `length` The number of bytes from the input buffer to encode.
+
+#### Returns
+number of bytes encoded.
+
+#### `public uint16_t `[`sysex_decode`](#group__sysex__tools_1gaaad1d9ba2d5eca709a0ab4ba40662229)`(uint8_t * decoded,const uint8_t * source,uint16_t length)` {#group__sysex__tools_1gaaad1d9ba2d5eca709a0ab4ba40662229}
+
+Decode encoded data.
+
+#### Parameters
+* `decoded` The output data buffer, must be at least sysex_decoded_length(length) bytes long. 
+
+* `source` The input buffer of data to be decoded. 
+
+* `length` The number of bytes from the input buffer to decode.
+
+#### Returns
+number of bytes decoded.
+