Hi,
RCC->APB1ENR |= RCC_APB1ENR_I2C2EN;
immeditly after turning on the I2C2 Clock I get a busy flag for I2C2.
Its then reset with:
GPIOF->MODER |= GPIO_MODER_MODER0_1 | GPIO_MODER_MODER1_1;
But when PUPDR is executed, the flag is busy again:
GPIOF->PUPDR &= ~(GPIO_PUPDR_PUPDR0_0 | GPIO_PUPDR_PUPDR1_0);
I can then reset the busy flag with:
I2C2->CR1 |= I2C_CR1_SWRST;
But after deactivating the SWRST the Busy flag is again active.
What is a bit odd, I had yesterday used the same code and had a full working I2C communication. (The selected SCL speed is 100khz, PF0 &PF1 and I'm using the STM32F429DISCOI Board.)
I also tried to use the PF0 and PF1 Pins as GPIO and ground them manual but no luck there as well.
Full I2C Init code:
RCC->APB1RSTR |= RCC_APB1RSTR_I2C2RST;
RCC->APB1RSTR &= ~(RCC_APB1RSTR_I2C2RST);
RCC->APB1ENR |= RCC_APB1ENR_I2C2EN;
GPIOF->AFR[0] |= (1 << 2) | (1 << 6);
GPIOF->MODER |= GPIO_MODER_MODER0_1 | GPIO_MODER_MODER1_1;
GPIOF->OTYPER |= GPIO_OTYPER_OT_0 | GPIO_OTYPER_OT_1;
GPIOF->PUPDR &= ~(GPIO_PUPDR_PUPDR0_0 | GPIO_PUPDR_PUPDR1_0);
GPIOF->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR0_0 | GPIO_OSPEEDER_OSPEEDR1_0;
I2C2->CR1 |= I2C_CR1_SWRST;
I2C2->CR1 &= ~(I2C_CR1_SWRST);
I2C2->CR2 &= ~(I2C_CR2_FREQ);
I2C2->CR2 |= 30;
I2C2->CCR &= ~I2C_CCR_CCR;
I2C2->CCR |= 150;
I2C2->TRISE |= (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) | (1 << 4);
I2C2->CR1 |= I2C_CR1_PE | I2C_CR1_ACK;
Can someone tell me how to fix this?
Thank you
