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path: root/drivers/avr/serial.c
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Diffstat (limited to 'drivers/avr/serial.c')
-rw-r--r--drivers/avr/serial.c82
1 files changed, 24 insertions, 58 deletions
diff --git a/drivers/avr/serial.c b/drivers/avr/serial.c
index 3647bee0d3..9a7345a53d 100644
--- a/drivers/avr/serial.c
+++ b/drivers/avr/serial.c
@@ -224,15 +224,8 @@
# define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY / 2)
# define SLAVE_INT_WIDTH_US 1
-# ifndef SERIAL_USE_MULTI_TRANSACTION
-# define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
-# else
-# define SLAVE_INT_ACK_WIDTH_UNIT 2
-# define SLAVE_INT_ACK_WIDTH 4
-# endif
-
-static SSTD_t *Transaction_table = NULL;
-static uint8_t Transaction_table_size = 0;
+# define SLAVE_INT_ACK_WIDTH_UNIT 2
+# define SLAVE_INT_ACK_WIDTH 4
inline static void serial_delay(void) ALWAYS_INLINE;
inline static void serial_delay(void) { _delay_us(SERIAL_DELAY); }
@@ -259,16 +252,12 @@ inline static void serial_low(void) { writePinLow(SOFT_SERIAL_PIN); }
inline static void serial_high(void) ALWAYS_INLINE;
inline static void serial_high(void) { writePinHigh(SOFT_SERIAL_PIN); }
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size) {
- Transaction_table = sstd_table;
- Transaction_table_size = (uint8_t)sstd_table_size;
+void soft_serial_initiator_init(void) {
serial_output();
serial_high();
}
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size) {
- Transaction_table = sstd_table;
- Transaction_table_size = (uint8_t)sstd_table_size;
+void soft_serial_target_init(void) {
serial_input_with_pullup();
// Enable INT0-INT7
@@ -395,19 +384,14 @@ static inline uint8_t nibble_bits_count(uint8_t bits) {
// interrupt handle to be used by the target device
ISR(SERIAL_PIN_INTERRUPT) {
-# ifndef SERIAL_USE_MULTI_TRANSACTION
- serial_low();
- serial_output();
- SSTD_t *trans = Transaction_table;
-# else
// recive transaction table index
uint8_t tid, bits;
uint8_t pecount = 0;
sync_recv();
- bits = serial_read_chunk(&pecount, 7);
+ bits = serial_read_chunk(&pecount, 8);
tid = bits >> 3;
- bits = (bits & 7) != nibble_bits_count(tid);
- if (bits || pecount > 0 || tid > Transaction_table_size) {
+ bits = (bits & 7) != (nibble_bits_count(tid) & 7);
+ if (bits || pecount > 0 || tid > NUM_TOTAL_TRANSACTIONS) {
return;
}
serial_delay_half1();
@@ -415,18 +399,22 @@ ISR(SERIAL_PIN_INTERRUPT) {
serial_high(); // response step1 low->high
serial_output();
_delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT * SLAVE_INT_ACK_WIDTH);
- SSTD_t *trans = &Transaction_table[tid];
+ split_transaction_desc_t *trans = &split_transaction_table[tid];
serial_low(); // response step2 ack high->low
-# endif
+
+ // If the transaction has a callback, we can execute it now
+ if (trans->slave_callback) {
+ trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans));
+ }
// target send phase
- if (trans->target2initiator_buffer_size > 0) serial_send_packet((uint8_t *)trans->target2initiator_buffer, trans->target2initiator_buffer_size);
+ if (trans->target2initiator_buffer_size > 0) serial_send_packet((uint8_t *)split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size);
// target switch to input
change_sender2reciver();
// target recive phase
if (trans->initiator2target_buffer_size > 0) {
- if (serial_recive_packet((uint8_t *)trans->initiator2target_buffer, trans->initiator2target_buffer_size)) {
+ if (serial_recive_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
*trans->status = TRANSACTION_ACCEPTED;
} else {
*trans->status = TRANSACTION_DATA_ERROR;
@@ -448,14 +436,12 @@ ISR(SERIAL_PIN_INTERRUPT) {
// TRANSACTION_NO_RESPONSE
// TRANSACTION_DATA_ERROR
// this code is very time dependent, so we need to disable interrupts
-# ifndef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_transaction(void) {
- SSTD_t *trans = Transaction_table;
-# else
int soft_serial_transaction(int sstd_index) {
- if (sstd_index > Transaction_table_size) return TRANSACTION_TYPE_ERROR;
- SSTD_t *trans = &Transaction_table[sstd_index];
-# endif
+ if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR;
+ split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
+
+ if (!trans->status) return TRANSACTION_TYPE_ERROR; // not registered
+
cli();
// signal to the target that we want to start a transaction
@@ -463,27 +449,11 @@ int soft_serial_transaction(int sstd_index) {
serial_low();
_delay_us(SLAVE_INT_WIDTH_US);
-# ifndef SERIAL_USE_MULTI_TRANSACTION
- // wait for the target response
- serial_input_with_pullup();
- _delay_us(SLAVE_INT_RESPONSE_TIME);
-
- // check if the target is present
- if (serial_read_pin()) {
- // target failed to pull the line low, assume not present
- serial_output();
- serial_high();
- *trans->status = TRANSACTION_NO_RESPONSE;
- sei();
- return TRANSACTION_NO_RESPONSE;
- }
-
-# else
// send transaction table index
int tid = (sstd_index << 3) | (7 & nibble_bits_count(sstd_index));
sync_send();
_delay_sub_us(TID_SEND_ADJUST);
- serial_write_chunk(tid, 7);
+ serial_write_chunk(tid, 8);
serial_delay_half1();
// wait for the target response (step1 low->high)
@@ -504,12 +474,11 @@ int soft_serial_transaction(int sstd_index) {
}
_delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
}
-# endif
// initiator recive phase
// if the target is present syncronize with it
if (trans->target2initiator_buffer_size > 0) {
- if (!serial_recive_packet((uint8_t *)trans->target2initiator_buffer, trans->target2initiator_buffer_size)) {
+ if (!serial_recive_packet((uint8_t *)split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
serial_output();
serial_high();
*trans->status = TRANSACTION_DATA_ERROR;
@@ -523,7 +492,7 @@ int soft_serial_transaction(int sstd_index) {
// initiator send phase
if (trans->initiator2target_buffer_size > 0) {
- serial_send_packet((uint8_t *)trans->initiator2target_buffer, trans->initiator2target_buffer_size);
+ serial_send_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size);
}
// always, release the line when not in use
@@ -534,9 +503,8 @@ int soft_serial_transaction(int sstd_index) {
return TRANSACTION_END;
}
-# ifdef SERIAL_USE_MULTI_TRANSACTION
int soft_serial_get_and_clean_status(int sstd_index) {
- SSTD_t *trans = &Transaction_table[sstd_index];
+ split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
cli();
int retval = *trans->status;
*trans->status = 0;
@@ -544,8 +512,6 @@ int soft_serial_get_and_clean_status(int sstd_index) {
sei();
return retval;
}
-# endif
-
#endif
// Helix serial.c history
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-10 02:27:25 +0000