STM32F4+DMA+PWM+TIME, DMA调不通pwm指令
单片机源程序如下:
- #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]; //发送数据缓冲区
- const u8 TEXT_TO_SEND[]={"ALIENTEK Explorer STM32F4 DMA 串口实验"};
-
- int main(void)
- {
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//设置系统中断优先级分组2
- delay_init(168); //初始化延时函数
- uart_init(115200); //初始化串口波特率为115200
- LED_Init(); //初始化LED
- LCD_Init(); //LCD初始化
- KEY_Init(); //按键初始化
-
- 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;//设置字体为蓝色
- WS2812_WriteRGB_Num3();
- while(1)
- {
- WS2812_WriteRGB_init(); //PWM指令
- TIM_DMACmd(TIM2, TIM_DMA_CC1, ENABLE); //使能TIM2
- MYDMA_Enable(); //开始一次DMA传输！
- while(1)
- {
- if(DMA_GetFlagStatus(DMA1_Stream5,DMA_FLAG_TCIF3)!=RESET)//等待DMA1_Steam5传输完成
- {
- DMA_ClearFlag(DMA1_Stream5,DMA_FLAG_TCIF3);//清除DMA1_Steam5传输完成标志
- break;
- }
- }
-
- delay_ms(500);
- WS2812_WriteRGB_Num3(); //PWM波形指令
- TIM_DMACmd(TIM2, TIM_DMA_CC1, ENABLE); //使能TIM2
- MYDMA_Enable(); //开始一次DMA传输！
- while(1)
- {
- if(DMA_GetFlagStatus(DMA1_Stream5,DMA_FLAG_TCIF3)!=RESET)//等待DMA1_Steam5传输完成
- {
- DMA_ClearFlag(DMA1_Stream5,DMA_FLAG_TCIF3);//清除DMA1_Steam5传输完成标志
- break;
- }
- }
-
- }
- }
所有程序51hei提供下载(管理提醒:多人回帖说此文件不能用 谨慎下载):
STM32F4+PWM+TIME+DMA.7z
(340.74 KB, 下载次数: 100)
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