STM32F4+DMA+PWM+TIME,調(diào)通pwm

ID:604707 · 發(fā)表于 2019-8-28 13:47

STM32F4+DMA+PWM+TIME, DMA調(diào)不通pwm指令

單片機源程序如下:

#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "lcd.h"
#include "key.h"
#include "dma.h"
extern u8 SendBuff[SEND_BUF_SIZE]; //發(fā)送數(shù)據(jù)緩沖區(qū)
const u8 TEXT_TO_SEND[]={"ALIENTEK Explorer STM32F4 DMA 串口實驗"};
int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//設置系統(tǒng)中斷優(yōu)先級分組2
delay_init(168); //初始化延時函數(shù)
uart_init(115200); //初始化串口波特率為115200
LED_Init(); //初始化LED
LCD_Init(); //LCD初始化
KEY_Init(); //按鍵初始化
Timer2_init();
MYDMA_Config();
POINT_COLOR=RED;
LCD_ShowString(30,50,200,16,16,"Explorer STM32F4");
LCD_ShowString(30,70,200,16,16,"DMA TEST");
LCD_ShowString(30,90,200,16,16,"ATOM@ALIENTEK");
LCD_ShowString(30,110,200,16,16,"2014/5/6");
LCD_ShowString(30,130,200,16,16,"KEY0:Start");
POINT_COLOR=BLUE;//設置字體為藍色
WS2812_WriteRGB_Num3();
while(1)
{
WS2812_WriteRGB_init(); //PWM指令
TIM_DMACmd(TIM2, TIM_DMA_CC1, ENABLE); //使能TIM2
MYDMA_Enable(); //開始一次DMA傳輸！
while(1)
{
if(DMA_GetFlagStatus(DMA1_Stream5,DMA_FLAG_TCIF3)!=RESET)//等待DMA1_Steam5傳輸完成
{
DMA_ClearFlag(DMA1_Stream5,DMA_FLAG_TCIF3);//清除DMA1_Steam5傳輸完成標志
break;
}
}
delay_ms(500);
WS2812_WriteRGB_Num3(); //PWM波形指令
TIM_DMACmd(TIM2, TIM_DMA_CC1, ENABLE); //使能TIM2
MYDMA_Enable(); //開始一次DMA傳輸！
while(1)
{
if(DMA_GetFlagStatus(DMA1_Stream5,DMA_FLAG_TCIF3)!=RESET)//等待DMA1_Steam5傳輸完成
{
DMA_ClearFlag(DMA1_Stream5,DMA_FLAG_TCIF3);//清除DMA1_Steam5傳輸完成標志
break;
}
}
}
}

復制代碼

所有程序51hei提供下載(管理提醒:多人回帖說此文件不能用謹慎下載):

STM32F4+PWM+TIME+DMA.7z (340.74 KB, 下載次數(shù): 100)

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STM32F4+DMA+PWM+TIME,調(diào)通pwm

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