STM32F4-Discovery I2C Problemi

[Bertan]

Merhabalar

     I2C kullanarak kitin üstündeki CS43L22 entegresinden veri okumaya çalşıyorum.Ama program her seferinde "while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));" satırında takılıyor.Programın I2C kısmını https://www.picproje.org/index.php?topic=59518.0 başlığındaki gibi yapıyorum.

Program :

#include "stm32f4xx.h"                  // Device header
#include <stdio.h>
#include <stdlib.h>

uint8_t readI2CData(uint8_t bytesToregs)
{
  uint8_t tmp=0;

  I2C_GenerateSTART(I2C1, ENABLE);

  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

  I2C_Send7bitAddress(I2C1, 0x94, I2C_Direction_Transmitter); // 0x94 cihaz i2c adresi
	
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));   // Program bu satırda takılıyor.

  I2C_SendData(I2C1, bytesToregs);

  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

  I2C_GenerateSTART(I2C1, ENABLE);
 
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));

  I2C_Send7bitAddress(I2C1, 0x94, I2C_Direction_Receiver);
 
  while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

  I2C_GenerateSTOP(I2C1, ENABLE);
 
  while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));

  tmp = I2C_ReceiveData(I2C1);

  return (tmp);
}


int main()
{	
	
	uint8_t data;
	char str[50];
	
	GPIO_InitTypeDef GPIO_InitStructure ;
	USART_InitTypeDef USART_InitStructure ;
	I2C_InitTypeDef I2C_InitStruct;
	
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE) ;
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);

	GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF ;                    //USART
	GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_2 | GPIO_Pin_3 ;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP ;
	GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz ;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2) ;
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2) ;
	
	GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF ;                      //I2C
	GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_6 | GPIO_Pin_9 ;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_OD ;
	GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz ;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
	GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_I2C1);	// SCL
	GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_I2C1);      // SDA
		
	USART_InitStructure.USART_BaudRate            = 57600 ;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None ;
	USART_InitStructure.USART_Mode                = USART_Mode_Tx | USART_Mode_Rx ;
	USART_InitStructure.USART_Parity              = USART_Parity_No ;
	USART_InitStructure.USART_StopBits            = USART_StopBits_1 ;
	USART_InitStructure.USART_WordLength          = USART_WordLength_8b ;
	USART_Init(USART2, &USART_InitStructure) ;
	USART_Cmd(USART2, ENABLE) ;
	
	I2C_DeInit(I2C1);
	
	I2C_InitStruct.I2C_ClockSpeed = 100000; 		
	I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;		
	I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;	
	I2C_InitStruct.I2C_OwnAddress1 = 0x00;			
	I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;		
	I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; 
	I2C_Init(I2C1, &I2C_InitStruct);
	I2C_Cmd(I2C1, ENABLE);

	data = readI2CData(0x01)>>3;	
	sprintf(str,"%d\n",data);
	USART_put(USART2 ,str);
	
  while(1);
	
}

Yardımcı olursanız sevinirim.Teşekkürler.

[DaRt]

cs43l22'nin enable pinini yüksek yapmadan çip i2cden iletişim kurmaz. Discovery kitte bu pin d4'e bağlıdır. Sanırım siz bu pini yüksek yapmamışsınız. Bu şekilde deneyin.

[Bertan]

Teşekkür ederim , dediğiniz gibi yaptım çalıştı