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AlexanderBrevig/ERRATA_2-13-7.c

Created February 13, 2017 02:05
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ERRATA_2-13-7.c
// http://www.stmicroelectronics.com.cn/content/ccc/resource/technical/document/errata_sheet/7d/02/75/64/17/fc/4d/fd/CD00190234.pdf/files/CD00190234.pdf/jcr:content/translations/en.CD00190234.pdf
// ERRATA 2.13.7
// disable I2C1
CLEAR_BIT(hi2c1.Instance->CR1, I2C_CR1_PE);
// make output open drain
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
// force high
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6|GPIO_PIN_7, GPIO_PIN_SET);
while (HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_6|GPIO_PIN_7) != GPIO_PIN_SET) {}
//force SDA low
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_RESET);
while (HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_7) != GPIO_PIN_RESET) {}
//force SCL low
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_RESET);
while (HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_6) != GPIO_PIN_RESET) {}
//force SCL high
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_SET);
while (HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_6) != GPIO_PIN_SET) {}
//force SDA high
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_SET);
while (HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_7) != GPIO_PIN_SET) {}
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
SET_BIT(hi2c1.Instance->CR1, I2C_CR1_SWRST);
CLEAR_BIT(hi2c1.Instance->CR1, I2C_CR1_SWRST);
SET_BIT(hi2c1.Instance->CR1, I2C_CR1_PE);
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