RGB stm32单片机ws2812LED控制，使用的是硬件驱动PWM + DMA
单片机源程序如下:
- #include "ws2812b.h"
- #include "stdlib.h"
- #include "delay.h"
- void WS2812_Send(uint8_t (*color)[3], uint16_t len)
- {
- uint8_t i;
- uint16_t memaddr;
- uint16_t buffersize;
- buffersize = (len*24)+43; // number of bytes needed is #LEDs * 24 bytes + 42 trailing bytes
- memaddr = 0; // reset buffer memory index
- while (len)
- {
-
- for(i=0; i<8; i++) // RED
- {
- LED_BYTE_Buffer[memaddr] = ((color[len-1][1]<<i) & 0x0080) ? TIMING_ONE:TIMING_ZERO;
- memaddr++;
- }
-
- for(i=0; i<8; i++) // GREEN data
- {
- LED_BYTE_Buffer[memaddr] = ((color[len-1][0]<<i) & 0x0080) ? TIMING_ONE:TIMING_ZERO;
- memaddr++;
- }
-
- for(i=0; i<8; i++) // BLUE
- {
- LED_BYTE_Buffer[memaddr] = ((color[len-1][2]<<i) & 0x0080) ? TIMING_ONE:TIMING_ZERO;
- memaddr++;
- }
- len--;
- }
- //===================================================================//
- //bug：最后一个周期波形是高电平，故增加一个低电平的波形
- LED_BYTE_Buffer[memaddr] = 0;
- //===================================================================//
- memaddr++;
- while(memaddr < buffersize)
- {
- LED_BYTE_Buffer[memaddr] = 0;
- memaddr++;
- }
- DMA_SetCurrDataCounter(DMA1_Channel7, buffersize); // load number of bytes to be transferred
- DMA_Cmd(DMA1_Channel7, ENABLE); // enable DMA channel 7
- TIM_Cmd(TIM2, ENABLE); // enable Timer 2
- while(!DMA_GetFlagStatus(DMA1_FLAG_TC7)) ; // wait until transfer complete
- DMA_Cmd(DMA1_Channel7, DISABLE); // disable DMA channel 7
- DMA_ClearFlag(DMA1_FLAG_TC7); // clear DMA1 Channel 7 transfer complete flag
- TIM_Cmd(TIM2, DISABLE); // disable Timer 2
- }
- void WS2812_Random() //随机闪灯
- {
- uint8_t rgb0[1][3];
- rgb0[0][0] = rand()%256;
- rgb0[0][1] = rand()%256;
- rgb0[0][2] = rand()%256;
- WS2812_Send(&rgb0[0],1);
- delay_s(1);
- }
- void WS2812_Red_BLN() //红色呼吸灯
- {
- u16 i;
- uint8_t rgb0[256][3] ={0,0,0};
- for(i=0;i<=255;i++)
- {
- rgb0[i][0] = i;
- }
- for(i=0;i<=255;i++)
- {
- WS2812_Send(&rgb0[i],1);
- delay_ms(5);
- }
- for(i=0;i<=255;i++)
- {
- rgb0[i][0] = (255 - i);
- }
- for(i=0;i<=255;i++)
- {
- WS2812_Send(&rgb0[i],1);
- delay_ms(5);
- }
- delay_ms(500);
-
- }
- void WS2812_Green_BLN() //绿色呼吸灯
- {
- u16 i;
- uint8_t rgb0[256][3] ={0,0,0};
- for(i=0;i<=255;i++)
- {
- rgb0[i][1] = i;
- }
- for(i=0;i<=255;i++)
- {
- WS2812_Send(&rgb0[i],1);
- delay_ms(5);
- }
- for(i=0;i<=255;i++)
- {
- rgb0[i][1] = (255 - i);
- }
- for(i=0;i<=255;i++)
- {
- WS2812_Send(&rgb0[i],1);
- delay_ms(5);
- }
- delay_ms(500);
- }
- void WS2812_Blue_BLN() //蓝色呼吸灯
- {
- u16 i;
- uint8_t rgb0[256][3] ={0,0,0};
- for(i=0;i<=255;i++)
- {
- rgb0[i][2] = i;
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
所有资料51hei提供下载:
WS2812B（PWM+DMA）.7z
(185.22 KB, 下载次数: 211)
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