Posted on April 24, 2012 at 09:13Hello everybody,
I have some troubel to communicate with m24LR64. I use a STM32L- Discovery.
I try to see something in the oscilloscope but nothing, could you help me to see what is wrong in my code:
#define I2C2_SLAVE_ADDRESS7 0xA0 // EEPROM I2C Address
#define ClockSpeed 200000 // 200 KHz
#include ''mainsee.h''
void I2Cmain(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
/* I2C1 and I2C2 Periph clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
/* GPIOB Periph clock enable */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
/* Configure I2C2 pins: SCL and SDA ----------------------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOB, GPIO_Pin_10, GPIO_AF_I2C2);
GPIO_PinAFConfig(GPIOB, GPIO_Pin_11, GPIO_AF_I2C2);
//I2C_DeInit(I2C2);
/* I2C2 configuration ------------------------------------------------------*/
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = I2C2_SLAVE_ADDRESS7;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = ClockSpeed;
I2C_Init(I2C2, &I2C_InitStructure);
/* Enable I2C2 -------------------------------------------------------------*/
I2C_Cmd(I2C2, ENABLE);
/* Send I2C1 START condition */
I2C_GenerateSTART(I2C2, ENABLE);
/* Test on I2C1 EV5 and clear it */
// while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
/* Send EEPROM slave Address for write */
//I2C_Send7bitAddress(I2C2, I2C2_SLAVE_ADDRESS7, I2C_Direction_Transmitter); }
/* Test on I2C1 EV6 and clear it */
// while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
while(1){
/* Send I2C1 EEPROM internal address */
I2C_SendData(I2C2, 0x00); }
/* Test on I2C1 EV8 and clear it */
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send I2C1 EEPROM data */
I2C_SendData(I2C2, 0x05);
/* Test on I2C1 EV8 and clear it */
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
/* Send I2C1 STOP Condition */
I2C_GenerateSTOP(I2C2, ENABLE);
while(1); // Do not exit
}
Thank you very much in advance to help me.
P.S: Sorry for the english, i'm French.
