STM32学习-DMA测试 - - Powered by Discuz!

/*******************************************************************************
STM32学习日志(8)----DMA测试
编译环境: EWARM V5.30
硬件环境: 南京万利 EK-STM32F
主芯片 : STM32F103VBT6
STM32 FW: V3.0.0
作者 : szlihongtao
时间 : 2010-06-30
*******************************************************************************/
/**
******************************************************************************
* @file Project/Template/main.c
* @author MCD Application Team
* @version V3.0.0
* @date 04/06/2009
* @brief Main program body
******************************************************************************
* @copy
*
* 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.
*
* <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "stm32_m.h"
/** @addtogroup Template_Project
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
#define BufferSize 47 // >=32的任意数
uc32 SRC_Const_Buffer[BufferSize]= {0x01020304,0x05060708,0x090A0B0C,0x0D0E0F10,
0x11121314,0x15161718,0x191A1B1C,0x1D1E1F20,
0x21222324,0x25262728,0x292A2B2C,0x2D2E2F30,
0x31323334,0x35363738,0x393A3B3C,0x3D3E3F40,
0x41424344,0x45464748,0x494A4B4C,0x4D4E4F50,
0x51525354,0x55565758,0x595A5B5C,0x5D5E5F60,
0x61626364,0x65666768,0x696A6B6C,0x6D6E6F70,
0x71727374,0x75767778,0x797A7B7C,0x7D7E7F80};
u32 DST_Buffer[BufferSize];
INT16U tmr_test;
//******************************************************************************
// 延时50ms
//******************************************************************************
static void delay(void)
{
INT32U i;
static INT32U jjj=5240*50;
for (i=0; i<jjj; i++);
}
//******************************************************************************
static void delayms(INT16U cnt)
{
INT16U i;
while(cnt--)
for (i=0; i<7333; i++);
}
//******************************************************************************
// 时钟设置初始化
//******************************************************************************
static void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
/*
RCC_AdjustHSICalibrationValue 调整内部高速晶振（HSI）校准值
RCC_ITConfig 使能或者失能指定的RCC中断
RCC_ClearFlag 清除RCC的复位标志位
RCC_GetITStatus 检查指定的RCC中断发生与否
RCC_ClearITPendingBit 清除RCC的中断待处理位
*/
/* RCC system reset(for debug purpose) */
// 时钟系统复位
RCC_DeInit();
// 使能外部的8M晶振
// 设置外部高速晶振（HSE）
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
// 使能或者失能内部高速晶振（HSI）
RCC_HSICmd(DISABLE);
// 等待HSE起振
// 该函数将等待直到HSE就绪，或者在超时的情况下退出
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* HCLK = SYSCLK */
// 设置AHB时钟（HCLK）
RCC_HCLKConfig(RCC_SYSCLK_Div1); // 72 MHz
/* PCLK1 = HCLK/2 */
// 设置低速AHB时钟（PCLK1）
RCC_PCLK1Config(RCC_HCLK_Div2); // 36 MHz
/* PCLK2 = HCLK */
// 设置高速AHB时钟（PCLK2）
RCC_PCLK2Config(RCC_HCLK_Div1); // 72 MHz
/* ADCCLK = PCLK2/8 */
// 设置ADC时钟（ADCCLK）
RCC_ADCCLKConfig(RCC_PCLK2_Div8);
// 设置USB时钟（USBCLK）
// USB时钟 = PLL时钟除以1.5
RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_1Div5);
// 设置外部低速晶振（LSE）
RCC_LSEConfig(RCC_LSE_OFF);
// 使能或者失能内部低速晶振（LSI）
// LSE晶振OFF
RCC_LSICmd(DISABLE);
// 设置RTC时钟（RTCCLK）
// 选择HSE时钟频率除以128作为RTC时钟
RCC_RTCCLKConfig(RCC_RTCCLKSource_HSE_Div128);
// 使能或者失能RTC时钟
// RTC时钟的新状态
RCC_RTCCLKCmd(DISABLE);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* PLLCLK = 8MHz * 9 = 72 MHz */
// 设置PLL时钟源及倍频系数
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
// 使能或者失能PLL
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
// 检查指定的RCC标志位设置与否
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
// 设置系统时钟（SYSCLK）
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
// 返回用作系统时钟的时钟源
while(RCC_GetSYSCLKSource() != 0x08)
{
}
}
// 使能或者失能AHB外设时钟
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1
|RCC_AHBPeriph_DMA2
|RCC_AHBPeriph_SRAM
|RCC_AHBPeriph_FLITF
|RCC_AHBPeriph_CRC
|RCC_AHBPeriph_FSMC
|RCC_AHBPeriph_SDIO,DISABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);// DMA1时钟使能
// 使能或者失能APB1外设时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_ALL,DISABLE);
// 强制或者释放高速APB（APB2）外设复位
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ALL,ENABLE);
// 退出复位状态
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ALL,DISABLE);
// 强制或者释放低速APB（APB1）外设复位
RCC_APB1PeriphResetCmd(RCC_APB1Periph_ALL,ENABLE);
// 强制或者释放后备域复位
RCC_BackupResetCmd(ENABLE);
// 使能或者失能时钟安全系统
RCC_ClockSecuritySystemCmd(DISABLE);
}
//******************************************************************************
// NVIC设置
//******************************************************************************
static void NVIC_Configuration(void)
{
}
//******************************************************************************
// SysTick设置初始化
//******************************************************************************
static void SysTick_Config1(void)
{
#define SystemFreq 72000000.0 // 单位为Hz
#define TB_SysTick 100000.0 // 单位为uS,与示波器实测一致
INT32U ticks;
ticks=(INT32U)((TB_SysTick/1000000.0)*SystemFreq);
ticks=ticks;
//SysTick_Config(ticks);
}
//******************************************************************************
// GPIO设置
//******************************************************************************
static void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
// 使能或者失能APB2外设时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOD, &GPIO_InitStructure);
}
//******************************************************************************
// LED5亮
//******************************************************************************
void Led_RW_ON(void)
{
GPIO_SetBits(GPIOC,GPIO_Pin_4);
}
//******************************************************************************
// LED5灭
//******************************************************************************
void Led_RW_OFF(void)
{
GPIO_ResetBits(GPIOC,GPIO_Pin_4);
}
//******************************************************************************
static void DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
// 注意，当程序需要多次使用dma功能的时候，下面的语句必须添加，否则，第2次的DMA无法完成
#if 0
DMA_DeInit(DMA1_Channel1);
#else
DMA_Cmd(DMA1_Channel1, DISABLE);
#endif
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)SRC_Const_Buffer;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)DST_Buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = BufferSize;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
/* Enable DMA Channel6 Transfer Complete interrupt */
DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, DISABLE);
/* Get Current Data Counter value before transfer begins */
//CurrDataCounter_Begin = DMA_GetCurrDataCounter(DMA1_Channel1);
DMA_ClearFlag(DMA1_FLAG_TC1);
}
/*******************************************************************************
* Function Name : Buffercmp
* Description : Compares two buffers.
* Input : - pBuffer, pBuffer1: buffers to be compared.
* : - BufferLength: buffer's length
* Output : None
* Return : PASSED: pBuffer identical to pBuffer1
* FAILED: pBuffer differs from pBuffer1
*******************************************************************************/
TestStatus Buffercmp(uc32* pBuffer, u32* pBuffer1, u16 BufferLength)
{
while (BufferLength--)
{
if (*pBuffer++ != *pBuffer1++)
return FAILED;
}
return PASSED;
}
//******************************************************************************
// 主程序
//******************************************************************************
int main(void)
{
INT16U i;
RCC_Configuration();
GPIO_Configuration();
NVIC_Configuration();
SysTick_Config1();
delay();
//------------------------------------------------------------------------------
for (;;)
{
for (i=0;i<BufferSize;++i)
DST_Buffer[i]=0;
DMA_Configuration();
DMA_Cmd(DMA1_Channel1, ENABLE);
while((DMA_GetFlagStatus(DMA1_IT_TC1))== RESET); // 等待DMA传送完成
if (PASSED == Buffercmp(SRC_Const_Buffer, DST_Buffer, BufferSize))
Led_RW_ON(); // led亮表示OK
else
Led_RW_OFF();
GPIOC->ODR ^= GPIO_Pin_7; // led2 toogle
delayms(80);
}
//------------------------------------------------------------------------------
}
//******************************************************************************
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval : None
*/
void assert_failed(uint8_t* file, uint32_t 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
/**
* @}
*/
//******************************************************************************
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
//******************************************************************************
/*
LED2---------PC7
LED3---------PC6
LED4---------PC5
LED5---------PC4
KEY2---------PD3
KEY3---------PD4
*/

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