summaryrefslogtreecommitdiff
path: root/keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c
diff options
context:
space:
mode:
authorJoel Challis <git@zvecr.com>2020-03-18 18:14:45 +0000
committerGitHub <noreply@github.com>2020-03-18 11:14:45 -0700
commitb6316c502499fd245cfb5ad468d7870d229f55d4 (patch)
tree9f61de0140fccabaa7f499008cc3ec03931e8414 /keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c
parentfc4ef6934dc8596882428d11877d065ca6272129 (diff)
[Keymap] I2C scanner (#8454)
* Add i2c scanner keymap * Add bodge for chibios * Fix readme title * make chibios bodge a little cleaner * fix typo in readme
Diffstat (limited to 'keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c')
-rw-r--r--keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c b/keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c
new file mode 100644
index 0000000000..262bd588f2
--- /dev/null
+++ b/keyboards/handwired/onekey/keymaps/i2c_scanner/keymap.c
@@ -0,0 +1,66 @@
+#include QMK_KEYBOARD_H
+
+#include "i2c_master.h"
+#include "debug.h"
+
+#define TIMEOUT 50
+
+// TODO: remove patch
+#ifdef PROTOCOL_CHIBIOS
+# pragma message("ChibiOS is currently 'best effort' and might not report accurate results")
+
+i2c_status_t i2c_start_bodge(uint8_t address, uint16_t timeout) {
+ i2c_start(address);
+
+ // except on ChibiOS where the only way is do do "something"
+ uint8_t data = 0;
+ return i2c_readReg(address, 0, &data, sizeof(data), TIMEOUT);
+}
+
+# define i2c_start i2c_start_bodge
+#endif
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ LAYOUT(KC_A) //
+};
+
+void do_scan(void) {
+ uint8_t nDevices = 0;
+
+ dprintf("Scanning...\n");
+
+ for (uint8_t address = 1; address < 127; address++) {
+ // The i2c_scanner uses the return value of
+ // i2c_start to see if a device did acknowledge to the address.
+ i2c_status_t error = i2c_start(address << 1, TIMEOUT);
+ if (error == I2C_STATUS_SUCCESS) {
+ i2c_stop();
+ dprintf(" I2C device found at address 0x%02X\n", address);
+ nDevices++;
+ } else {
+ // dprintf(" Unknown error (%u) at address 0x%02X\n", error, address);
+ }
+ }
+
+ if (nDevices == 0)
+ dprintf("No I2C devices found\n");
+ else
+ dprintf("done\n");
+}
+
+uint16_t scan_timer = 0;
+
+void matrix_scan_user(void) {
+ if (timer_elapsed(scan_timer) > 5000) {
+ do_scan();
+ scan_timer = timer_read();
+ }
+}
+
+void keyboard_post_init_user(void) {
+ debug_enable = true;
+ debug_matrix = true;
+
+ i2c_init();
+ scan_timer = timer_read();
+}