led_matrix works now

[qmk_firmware.git] / drivers / arm / i2c_master.c

diff --git a/drivers/arm/i2c_master.c b/drivers/arm/i2c_master.c
index 2a7badd351f29a8834410a0dd3385d260f297d68..1c3da2a1a28aff0f42b43b0cabeae4f05496f3a7 100644 (file)
--- a/drivers/arm/i2c_master.c
+++ b/drivers/arm/i2c_master.c
@@ -26,12 +26,13 @@
  */
 
 #include "i2c_master.h"
+#include "quantum.h"
 #include <string.h>
 #include <hal.h>
 
 static uint8_t i2c_address;
 
-// This configures the I2C clock to 400Mhz assuming a 72Mhz clock
+// This configures the I2C clock to 400khz assuming a 72Mhz clock
 // For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
 static const I2CConfig i2cconfig = {
   STM32_TIMINGR_PRESC(15U) |
@@ -41,13 +42,17 @@ static const I2CConfig i2cconfig = {
   0
 };
 
+__attribute__ ((weak))
 void i2c_init(void)
 {
-  palSetGroupMode(GPIOB, GPIOB_PIN6 | GPIOB_PIN7, 0, PAL_MODE_INPUT); // Try releasing special pins for a short time
+  // Try releasing special pins for a short time
+  palSetPadMode(I2C1_BANK, I2C1_SCL, PAL_MODE_INPUT);
+  palSetPadMode(I2C1_BANK, I2C1_SDA, PAL_MODE_INPUT);
+
   chThdSleepMilliseconds(10);
 
-  palSetPadMode(GPIOB, 6, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_PUPDR_PULLUP);
-  palSetPadMode(GPIOB, 7, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_PUPDR_PULLUP);
+  palSetPadMode(I2C1_BANK, I2C1_SCL, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN);
+  palSetPadMode(I2C1_BANK, I2C1_SDA, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN);
 
   //i2cInit(); //This is invoked by halInit() so no need to redo it.
 }
@@ -62,6 +67,7 @@ uint8_t i2c_start(uint8_t address)
 
 uint8_t i2c_transmit(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout)
 {
+  // FIXME: Next steps: Add a print here, copy this file to your rgb_matrix firmware. Compare both.
   i2c_address = address;
   i2cStart(&I2C_DRIVER, &i2cconfig);
   return i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), data, length, 0, 0, MS2ST(timeout));