stm32 DMA数据搬运 操作寄存器+库函数

Library/inc/dma.h

#include     void Dma_Init(DMA_Channel_TypeDef * DMA_CHx,u32 P_Adress ,u32 M_Address);void Dma_Enable(DMA_Channel_TypeDef * DMA_CHx,u16 Number);

直接操作寄存器输出：

the CPU spend : 972us!

CPU Transmit Success!

the DMA spend : 5us!

DMA Transmit Success!

库函数操作

mian.c

#include "stm32f10x.h"#include "stdio.h"#include "string.h"#define     PRINTF_ON  1#define  BufferSize  32vu16 LeftDataCounter;vu32 Tick;uc32 SRC_Const_Buffer[BufferSize] = {    0x01020304,0x05060708,0x090A0B0C,0x0D0E0F10,0x21314,0x15161718,0x191A1B1C,0x1D1E1F20,0x21324,0x25262728,0x292A2B2C,0x2D2E2F30,0x31324,0x35363738,0x393A3B3C,0x3D3E3F40,0x41424344,0x45464748,0x494A4B4C,0x4D4E4F50,0x51525354,0x65758,0x595A5B5C,0x5D5E5F60,0x61626364,0x65768,0x696A6B6C,0x6D6E6F70,0x71727374,0x75768,0x797A7B7C,0x7D7E7F80};u32 DST_Buffer[BufferSize];u8 i=0,DMASpendTime=0,CPUSpendTime=0;void RCC_Configuration(void);void GPIO_Configuration(void);void NVIC_Configuration(void);void USART_Configuration(void);void DMA_Configuration(void);int main(void){RCC_Configuration();GPIO_Configuration();NVIC_Configuration();USART_Configuration();DMA_Configuration();SysTick_Config(72);Tick = 0;while(i
stm32f10x_it.c
#include "stm32f10x_it.h"#include "stdio.h"extern vu32 Tick;extern vu16 LeftDataCounter;void SysTick_Handler(void){Tick++;}void DMA1_Channel6_IRQHandler(void){LeftDataCounter = DMA_GetCurrDataCounter(DMA1_Channel6);   //获取剩余待传输数据DMA_ClearITPendingBit(DMA1_IT_GL6);}
库函数输出：
Transmit Success!
the CPU spend : 68us!
the DMA spend : 7us!