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Only try to recover I2C if SDA is low.

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This commit is contained in:
László Monda
2017-10-04 01:22:22 +02:00
parent 2027940b4c
commit efb0f982d2
1 changed files with 8 additions and 1 deletions
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9
right/src/init_peripherals.c
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@@ -29,12 +29,19 @@ void delay(void)
void recoverI2c(void)
{
PORT_SetPinMux(I2C_MAIN_BUS_SDA_PORT, I2C_MAIN_BUS_SDA_PIN, kPORT_MuxAsGpio);
GPIO_PinInit(I2C_MAIN_BUS_SDA_GPIO, I2C_MAIN_BUS_SDA_PIN, &(gpio_pin_config_t){kGPIO_DigitalOutput, 1});
PORT_SetPinMux(I2C_MAIN_BUS_SCL_PORT, I2C_MAIN_BUS_SCL_PIN, kPORT_MuxAsGpio);
GPIO_PinInit(I2C_MAIN_BUS_SCL_GPIO, I2C_MAIN_BUS_SCL_PIN, &(gpio_pin_config_t){kGPIO_DigitalOutput, 1});
bool isOn = true;
for (int i=0; i<20; i++) {
GPIO_PinInit(I2C_MAIN_BUS_SDA_GPIO, I2C_MAIN_BUS_SDA_PIN, &(gpio_pin_config_t){kGPIO_DigitalInput});
bool isSdaHigh = GPIO_ReadPinInput(I2C_MAIN_BUS_SDA_GPIO, I2C_MAIN_BUS_SDA_PIN);
GPIO_PinInit(I2C_MAIN_BUS_SDA_GPIO, I2C_MAIN_BUS_SDA_PIN, &(gpio_pin_config_t){kGPIO_DigitalOutput, 1});
if (isSdaHigh) {
return;
}
GPIO_WritePinOutput(I2C_MAIN_BUS_SCL_GPIO, I2C_MAIN_BUS_SCL_PIN, isOn);
delay();
isOn = !isOn;