Problem with I2C

[dnm_es]

Posted on July 15, 2014 at 13:46

Hello my name is Dani, I'm starting with bus I2C and the microcontroler stm32f103rd, I have made the next code, it doesn't work. I would like to control a light sensor.

The program stops in:

  while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));    

GPIO_InitTypeDef GPIO_InitStructure;

I2C_InitTypeDef I2C_InitStructure;

int main( void )

{       SysTick_Setup();      I2C_DeInit(I2C1);     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);   RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);     /* Configure I2C1 pins: SCL and SDA */   GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6;   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;   GPIO_Init(GPIOB, &GPIO_InitStructure);      GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_7;    GPIO_Init(GPIOB, &GPIO_InitStructure);     /* Enable I2C1 reset state */   RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, ENABLE);   /* Release I2C1 from reset state */   RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, DISABLE);     /* I2C configuration */   I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;   I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;   I2C_InitStructure.I2C_OwnAddress1 = 0x01;   I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;   I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;   I2C_InitStructure.I2C_ClockSpeed = 100000;     I2C_SoftwareResetCmd(I2C1,ENABLE);   I2C_SoftwareResetCmd(I2C1,DISABLE);     /* Apply I2C configuration after enabling it */   I2C_Cmd(I2C1,ENABLE);     I2C_Init(I2C1, &I2C_InitStructure);              while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));              I2C_GenerateSTART(I2C1, ENABLE);                                 /* Send I2C1 START condition */   while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));       /* Test on I2C1 EV5 and clear it */                 I2C_Send7bitAddress(I2C1, I2C_SLAVE_ADDRESS7  , I2C_Direction_Transmitter);   while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));   /* Test on EV6 and clear it */   I2C_ClearITPendingBit(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED);                    I2C_SendData(I2C1, 0x01);         while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));                   I2C_GenerateSTOP(I2C1, ENABLE);     while(!I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE));   lsb = I2C_ReceiveData(I2C1);       I2C_GenerateSTOP(I2C1, ENABLE);   } This code works with stm32f103RB  but not with stm32f103RD. Thanks in advance.