I2C driver docs (#4298)
* I2C driver docs - Added I2C driver docs. - Changed arm master i2c driver to have a weak i2c_init as it is impossible to account for all possible port configuration in the STM32 world. * Update docs/i2c_driver.md Co-Authored-By: yiancar <yiangosyiangou@cytanet.com.cy> * Update docs/i2c_driver.md Co-Authored-By: yiancar <yiangosyiangou@cytanet.com.cy> * Update docs/i2c_driver.md Co-Authored-By: yiancar <yiangosyiangou@cytanet.com.cy> * Update docs/i2c_driver.md Co-Authored-By: yiancar <yiangosyiangou@cytanet.com.cy> * GPIO release fix
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4 changed files with 89 additions and 1 deletions
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@ -26,6 +26,7 @@
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*/
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#include "i2c_master.h"
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#include "quantum.h"
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#include <string.h>
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#include <hal.h>
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@ -41,9 +42,11 @@ static const I2CConfig i2cconfig = {
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0
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};
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__attribute__ ((weak))
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void i2c_init(void)
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{
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palSetGroupMode(GPIOB, GPIOB_PIN6 | GPIOB_PIN7, 0, PAL_MODE_INPUT); // Try releasing special pins for a short time
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setPinInput(B6); // Try releasing special pins for a short time
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setPinInput(B7);
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chThdSleepMilliseconds(10);
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palSetPadMode(GPIOB, 6, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_PUPDR_PULLUP);
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