STM32定时器触发AD采样+DMA传输问题

endlesswind 提问时间：2008-9-3 17:21 /

试验环境：EWARM 4.41A + J-link + 目标板试验内容：TIM1->CC1触发ADC采样，单通道，采样结果使用DMA传输到SRAM中。
问题：下载程序提示SRAM校验错误，拔下J-link一端的USB口再插上，下载OK --->停止程序，再下载，提示错误，再拔下J-link USB口，再下载，OK---> ...如此反复。

仔细看了下Debuglog,发现存放DMA传输到的目标内存数据校验错误(IAR debugger选项中的verify download选上)，如下：
Verify error at address 0x2000007C, target byte: 0x3F, byte in file: 0x01
分析：可能是停止程序的时候，TIM1和ADC,DMA都没有停下来，下载的时候，DMA一直写数据到开辟的内存中，导致那部分内存数据校验错误。
以上只是个人的一些看法，不知道不否正确，有没有哪位帮分析下。

/******************************************************************************/
附录1：试验程序源码：
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define ADC1_DR_Address ((u32)0x4001244C)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
TIM1_TimeBaseInitTypeDef TIM1_TimeBaseStructure;
TIM1_OCInitTypeDef TIM1_OCInitStructure;
TIM1_BDTRInitTypeDef TIM1_BDTRInitStructure;
u16 ADC_RegularConvertedValueTab[32];
ErrorStatus HSEStartUpStatus;

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);

/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* 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();
/* GPIO configuration ------------------------------------------------------*/
GPIO_Configuration();
TIM1_DeInit();
/* Time Base configuration */
TIM1_TimeBaseStructure.TIM1_Prescaler = 0x00;
TIM1_TimeBaseStructure.TIM1_CounterMode = TIM1_CounterMode_Up;
TIM1_TimeBaseStructure.TIM1_Period = 3599;
TIM1_TimeBaseStructure.TIM1_ClockDivision = 0x00;
TIM1_TimeBaseStructure.TIM1_RepetitionCounter = 0x00;
TIM1_TimeBaseInit(&TIM1_TimeBaseStructure);
/* Channel1 Configuration in PWM mode */
TIM1_OCInitStructure.TIM1_OCMode = TIM1_OCMode_PWM1;
TIM1_OCInitStructure.TIM1_OutputState = TIM1_OutputState_Enable;
TIM1_OCInitStructure.TIM1_OutputNState = TIM1_OutputNState_Enable;
TIM1_OCInitStructure.TIM1_Pulse = 100;
TIM1_OCInitStructure.TIM1_OCPolarity = TIM1_OCPolarity_Low;
TIM1_OCInitStructure.TIM1_OCNPolarity = TIM1_OCNPolarity_High;
TIM1_OCInitStructure.TIM1_OCIdleState = TIM1_OCIdleState_Set;
TIM1_OCInitStructure.TIM1_OCNIdleState = TIM1_OCIdleState_Reset;
TIM1_OC1Init(&TIM1_OCInitStructure);
/* TIM1 main Output Enable */
TIM1_CtrlPWMOutputs(ENABLE);
/* TIM1 counter enable */
TIM1_Cmd(ENABLE);
/* DMA Channel1 Configuration ----------------------------------------------*/
DMA_DeInit(DMA_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_RegularConvertedValueTab;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 32;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA_Channel1, &DMA_InitStructure);
/* Enable DMA channel1 */
DMA_Cmd(DMA_Channel1, ENABLE);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channel14 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_13Cycles5);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 external trigger */
ADC_ExternalTrigConvCmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* TIM1 counter enable */
//TIM1_Cmd(ENABLE);

/* Test on channel1 transfer complete flag */
while(!DMA_GetFlagStatus(DMA_FLAG_TC1));
/* Clear channel1 transfer complete flag */
DMA_ClearFlag(DMA_FLAG_TC1);
/* TIM1 counter disable */
//TIM1_Cmd(DISABLE);
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);
/* ADCCLK = PCLK2/4 */
RCC_ADCCLKConfig(RCC_PCLK2_Div4);

/* PLLCLK = 8MHz * 7 = 56 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_7);
/* 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)
{
}
}

/* Enable peripheral clocks --------------------------------------------------*/
/* Enable DMA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA, ENABLE);
/* Enable GPIOA, GPIOC, ADC1 and TIM1 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC |
RCC_APB2Periph_ADC1 | RCC_APB2Periph_TIM1, ENABLE);
}
/*******************************************************************************
* Function Name : GPIO_Configuration
* Description : Configures the different GPIO ports.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Configure PC.01 and PC.04 (ADC Channel11 and Channel14) as analog input */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name : NVIC_Configuration
* Description : Configures NVIC and 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
}

/******************************************************************************/

附录2：Debug Log
Thu Jan 03 20:00:46 2008: DLL version: V3.62a, compiled Feb 23 2007 17:06:09
Thu Jan 03 20:00:46 2008: Firmware: J-Link compiled Jun 14 2007 14:36:33 ARM Rev.5
Thu Jan 03 20:00:46 2008: JTAG speed is initially set to: 32 kHz
Thu Jan 03 20:00:46 2008: Found Cortex-M3, Little endian.
Thu Jan 03 20:00:46 2008: TPIU fitted.
Thu Jan 03 20:00:46 2008: FPUnit: 6 code (BP) slots and 2 literal slots
Thu Jan 03 20:00:46 2008: Software reset was performed
Thu Jan 03 20:00:46 2008: Initial reset was performed
Thu Jan 03 20:00:46 2008: J-Link found 2 JTAG devices. ARM core Id: 3BA00477(Cortex M3), ARM core Id: 00000000(ARM9)
Thu Jan 03 20:00:46 2008: Device at TAP0 selected
Thu Jan 03 20:00:47 2008: 3080 bytes downloaded and verified (5.20 Kbytes/sec)
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000007C, target byte: 0x42, byte in file: 0x01
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000007D, target byte: 0x08, byte in file: 0x80
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000007E, target byte: 0xCE, byte in file: 0x70
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000007F, target byte: 0x07, byte in file: 0x47
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000080, target byte: 0x42, byte in file: 0x50
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000081, target byte: 0x08, byte in file: 0xF0
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000082, target byte: 0xCF, byte in file: 0x00
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000083, target byte: 0x07, byte in file: 0x60
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000084, target byte: 0x43, byte in file: 0x81
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000085, target byte: 0x08, byte in file: 0x05
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000086, target byte: 0xCE, byte in file: 0x02
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000087, target byte: 0x07, byte in file: 0xD0
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000088, target byte: 0x42, byte in file: 0x5F
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000089, target byte: 0x08, byte in file: 0xF0
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000008A, target byte: 0xCE, byte in file: 0xFF
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000008B, target byte: 0x07, byte in file: 0x30
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000008C, target byte: 0x42, byte in file: 0x70
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000008D, target byte: 0x08, byte in file: 0x47
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000008E, target byte: 0xCF, byte in file: 0x2E
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000008F, target byte: 0x07, byte in file: 0x49
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000090, target byte: 0x41, byte in file: 0x0A
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000091, target byte: 0x08, byte in file: 0x68
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000092, target byte: 0xCE, byte in file: 0xD2
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000094, target byte: 0x41, byte in file: 0xFB
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000095, target byte: 0x08, byte in file: 0xD4
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000096, target byte: 0xCB, byte in file: 0x2D
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000097, target byte: 0x07, byte in file: 0x4A
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000098, target byte: 0x42, byte in file: 0x13
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000099, target byte: 0x08, byte in file: 0x68
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000009A, target byte: 0xCD, byte in file: 0x53
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000009B, target byte: 0x07, byte in file: 0xF0
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000005C, target byte: 0x40, byte in file: 0x15
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000005D, target byte: 0x08, byte in file: 0x00
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000005E, target byte: 0xC8, byte in file: 0x00
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000005F, target byte: 0x07, byte in file: 0x20
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000060, target byte: 0x3E, byte in file: 0x03
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000061, target byte: 0x08, byte in file: 0x4C
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000062, target byte: 0xD3, byte in file: 0x4F
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000063, target byte: 0x07, byte in file: 0xF0
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000064, target byte: 0x49, byte in file: 0x00
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000065, target byte: 0x08, byte in file: 0x00
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000066, target byte: 0xD2, byte in file: 0xA0
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000067, target byte: 0x07, byte in file: 0x47
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000068, target byte: 0x45, byte in file: 0x02
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000069, target byte: 0x08, byte in file: 0x4C
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000006A, target byte: 0xD1, byte in file: 0x03
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000006B, target byte: 0x07, byte in file: 0x4D
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000006C, target byte: 0x42, byte in file: 0xAE
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000006D, target byte: 0x08, byte in file: 0x46
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000006E, target byte: 0xCE, byte in file: 0x20
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000006F, target byte: 0x07, byte in file: 0x47
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000070, target byte: 0x41, byte in file: 0xC1
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000071, target byte: 0x08, byte in file: 0x05
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000072, target byte: 0xCA, byte in file: 0x00
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000073, target byte: 0x07, byte in file: 0x20
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000074, target byte: 0x40, byte in file: 0xC9
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000075, target byte: 0x08, byte in file: 0x06
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000076, target byte: 0xC9, byte in file: 0x00
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000077, target byte: 0x07, byte in file: 0x20
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x20000078, target byte: 0x3B, byte in file: 0x9D
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000007A, target byte: 0xD1, byte in file: 0x00
Thu Jan 03 20:00:47 2008: Warning:
Verify error at address 0x2000007B, target byte: 0x07, byte in file: 0x20
Thu Jan 03 20:00:47 2008: There were warnings during download of FLASH loader, see Log Window
Thu Jan 03 20:00:48 2008: Failed to load flash loader: C:\Program Files\IAR Systems\Embedded Workbench 4.0 Evaluation\ARM\config\flashloader\ST\FlashSTM32F10x.d79

出处：jessemok