Posted on May 17, 2011 at 13:00Hi,
I have seen jki has the same problem and have solve it. May be I do something wrong, but I2C1 does not run. Please help.
I am using I2C1 and FSMC on a STM32F103VC. On the PB6 and PB7 and after RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, DISABLE), I2C1 works well. After RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC , ENABLE) and remap I2C1 to PB8 & PB9 I2C1 does not work.
I do following:
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |
RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD |
RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO |
RCC_APB2Periph_USART1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2 | RCC_APB1Periph_I2C1 | RCC_APB1Periph_PWR |
RCC_APB1Periph_SPI2 | RCC_APB1Periph_BKP |
RCC_APB1Periph_TIM2 |RCC_APB1Periph_DAC, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC | RCC_AHBPeriph_DMA1, ENABLE);
……….
#define GPIO_PIN_I2C1SCL GPIO_Pin_8
#define GPIO_PIN_I2C1SDA GPIO_Pin_9
GPIO_PinRemapConfig(GPIO_Remap_I2C1, ENABLE);
// Configure GPIOB Pin8 (SCL) & Pin9 (SDA) as I2C1
GPIO_InitStructure.GPIO_Pin = GPIO_PIN_I2C1SCL | GPIO_PIN_I2C1SDA;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIO_I2C1, &GPIO_InitStructure);
…….
Regards
Klaus Haber
