我们我用IIC dma方式通讯，怎么失败？找不出原因？麻烦各位高手帮忙找找
[code]/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : main.c
* Author : MCD Application Team
* Version : V2.0.3
* Date : 09/22/2008
* Description : Main program body
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "i2c_comm_dma.h"
#include <stdio.h>
/* Private typedef -----------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
/* Private define ------------------------------------------------------------*/
#define EEPROM_WriteAddress1 0x05
#define EEPROM_ReadAddress1 0x05
#define BufferSize1 (countof(Tx1_Buffer)-1)
#define BufferSize2 (countof(Tx2_Buffer)-1)
#define EEPROM_WriteAddress2 (EEPROM_WriteAddress1 + BufferSize1)
#define EEPROM_ReadAddress2 (EEPROM_ReadAddress1 + BufferSize1)
/* Private macro -------------------------------------------------------------*/
#define countof(a) (sizeof(a) / sizeof(*(a)))
/* Private variables ---------------------------------------------------------*/
//u8 Tx1_Buffer[] = "/* STM32F10x I2C Firmware ";
//u8 Tx2_Buffer[] = "Library Example */";
u8 Tx1_Buffer[] = {0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x40};
u8 Tx2_Buffer[] = {0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x50};
u8 Rx1_Buffer[BufferSize1], Rx2_Buffer[BufferSize2];
volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED;
ErrorStatus HSEStartUpStatus;
/* Private functions ---------------------------------------------------------*/
void RCC_Configuration(void);
void NVIC_Configuration(void);
TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength);
I2C_InitTypeDef I2C_InitStructure;
I2C_Result re;
u32 i;
void USART1_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
/* config USART1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
/* USART1 GPIO config */
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* USART1 mode config */
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}
int fputc(int ch, FILE *f)
{
/* ½«PrintfÄÚÈÝ·¢Íù´®¿Ú */
USART_SendData(USART1, (unsigned char) ch);
while (!(USART1->SR & USART_FLAG_TXE));
return (ch);
}
void delay(u32 nCount)
{
u32 j;
for(j=nCount;j>0;j--);
return;
}
/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
debug();
#endif
/* System clocks configuration ---------------------------------------------*/
RCC_Configuration();
/* NVIC configuration ------------------------------------------------------*/
NVIC_Configuration();
USART1_Config();
// PA.7 for toggle test
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
//*((u8 *)0x4001080c) |=0x80;
//*((u8* )0x4001080c) &= 0x7f;
I2C_Comm_Init(I2C1, 400000, 0x0);
delay(0xffffff);
printf("hello world\r\n");
#if 1 // Test A: act as master of I2C1 to commucate with I2C slave on other board
/*treat other stm32 as mcu, so not offset*/
I2C_Comm_MasterSend(I2C1, 0xb0, 0xff, Tx1_Buffer, 6);
// printf("i2c_comm_state=%d\r\n",i2c_comm_state);
while(i2c_comm_state != COMM_DONE);
/*treat other stm32 as e2prom, so valid offet=7 */
// I2C_Comm_MasterSend(I2C1, 0xb0, 0x07, Tx1_Buffer, 6);
// while(i2c_comm_state != COMM_DONE);
for(i=0;i<BufferSize1;i++)
printf("Tx1_Buffer=%x\r\n",Tx1_Buffer);
printf("i2c_comm_state=%d\r\n",i2c_comm_state);
I2C_Comm_MasterReceive(I2C1, 0xb0, 0xff, Rx1_Buffer, 6);
while(i2c_comm_state != COMM_DONE);
I2C_Comm_MasterReceive(I2C1, 0xb0, 0x07, Rx1_Buffer, 6);
while(i2c_comm_state != COMM_DONE);
for(i=0;i<BufferSize1;i++)
printf("Rx1_Buffer=%x\r\n",Rx1_Buffer);
printf("i2c_comm_state=%d\r\n",i2c_comm_state);
/*treat other stm32 as e2prom, so valid offet=3 */
#endif
#if 1 // Test B: act as master of I2C1 to communicate with e2prom on the same board
// if uncomment this block, traced info in ISR of test_index++ should be comment
I2C_Comm_MasterSend(I2C1, 0xa0, 0, Tx1_Buffer, 8);
while(i2c_comm_state != COMM_DONE);
I2C_Comm_MasterReceive(I2C1, 0xa0, 0, Rx1_Buffer, 8);
while(i2c_comm_state != COMM_DONE);
TransferStatus2 = Buffercmp(Tx1_Buffer, Rx1_Buffer, 5);
#endif
/*uncomment below code if bus not restore to idle state*/
{
GPIO_InitTypeDef GPIO_InitStructure;
// if master-receiver do not send NAK, then DAT would remain low
// then let PB.7 to be GPIO and let it high
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, DISABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_WriteBit( GPIOB, GPIO_Pin_6|GPIO_Pin_7, Bit_SET);
}
while (1);
}
/*******************************************************************************
* Function Name : RCC_Configuration
* Description : Configures the different system clocks.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void RCC_Configuration(void)
{
/* RCC system reset(for debug purpose) */
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures Vector Table base location.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void NVIC_Configuration(void)
{
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
}
/*******************************************************************************
* Function Name : Buffercmp
* Description : Compares two buffers.
* Input : - pBuffer1, pBuffer2: buffers to be compared.
* : - BufferLength: buffer's length
* Output : None
* Return : PASSED: pBuffer1 identical to pBuffer2
* FAILED: pBuffer1 differs from pBuffer2
*******************************************************************************/
TestStatus Buffercmp(u8* pBuffer1, u8* pBuffer2, u16 BufferLength)
{
while(BufferLength--)
{
if(*pBuffer1 != *pBuffer2)
{
return FAILED;
}
pBuffer1++;
pBuffer2++;
}
return PASSED;
}
#ifdef DEBUG
/*******************************************************************************
* Function Name : assert_failed
* Description : Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* Input : - file: pointer to the source file name
* - line: assert_param error line source number
* Output : None
* Return : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif |
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