STC15单片机驱动WS2812

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我们先来看时序图！

#include <STC15F2K60S2.H>#include "intrins.h"sbit WS2812 = P1^7;#define numLEDs 8   //灯的个数unsigned char buf_R[numLEDs] = {0};//颜色缓存unsigned char buf_G[numLEDs] = {0};unsigned char buf_B[numLEDs] = {0};void RGB_Set_Up();  //送0码void RGB_Set_Down(); //送1码void HAL_Delay(unsigned int t){unsigned int x,y;  for(x=114;x>0;x--)  for(y=t;y>0;y--);} //复位延时void Delay50us()//@22.1184MHz{unsigned char i, j;_nop_();_nop_();i = 2;j = 15;do{while (--j);} while (--i);}//1码，高电平850ns 低电平400ns 误差正负150nsvoid RGB_Set_Up(){WS2812 = 1;  //经过逻辑分析仪调试的的延时_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();   _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();_nop_(); WS2812 = 0;}//1码，高电平400ns 低电平850ns 误差正负150nsvoid RGB_Set_Down(){WS2812 = 1;  //经过逻辑分析仪调试的的延时_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_();  WS2812 = 0;}//发送24位数据void Send_2811_24bits(unsigned char G8,unsigned char R8,unsigned char B8){    unsigned int n = 0;  //发送G8位for(n=0;n<8;n++){G8<<=n;if(G8&0x80 == 0x80){RGB_Set_Up();}else  {  RGB_Set_Down();}}//发送R8位for(n=0;n<8;n++){R8<<=n;if(R8&0x80 == 0x80){RGB_Set_Up();}else  {RGB_Set_Down();}}//发送B8位  for(n=0;n<8;n++){B8<<=n;if(B8&0x80 == 0x80){RGB_Set_Up();}else  {  RGB_Set_Down();}}}//复位码void RGB_Rst(){WS2812 = 0;Delay50us();}//把24位数据GRB码转RGBvoid Set_Colour(unsigned char r,unsigned char g,unsigned char b){  unsigned char i;for(i=0;i<numLEDs;i++)  {buf_R[i] = r; //缓冲  buf_G[i] = g;  buf_B[i] = b;}for(i=0;i<numLEDs;i++){Send_2811_24bits(buf_G[i],buf_R[i],buf_B[i]);//发送显示}}//某一个点显示的颜色void SetPointColour(unsigned int num,unsigned char r,unsigned char g,unsigned char b){  unsigned char i;for(i=0;i<numLEDs;i++)  {buf_R[num] = r;//缓冲  buf_G[num] = g;  buf_B[num] = b;}for(i=0;i<numLEDs;i++){Send_2811_24bits(buf_G[i],buf_R[i],buf_B[i]);//发送显示}}//颜色交换24位不拆分发void SetPixelColor(unsigned char num,unsigned long c){  unsigned char i;for(i=0;i<numLEDs;i++)  {buf_R[num] = (unsigned char)(c>>16);  buf_G[num] = (unsigned char)(c>>8);  buf_B[num] = (unsigned char)(c);}for(i=0;i<numLEDs;i++){Send_2811_24bits(buf_G[i],buf_R[i],buf_B[i]);}}//复位void PixelUpdate(){RGB_Rst();}//颜色unsigned long Color(unsigned char r, unsigned char g, unsigned char b){  return ((unsigned long)r << 16) | ((unsigned long)g <<  8) | b;}//颜色算法unsigned long Wheel(unsigned char WheelPos){  WheelPos = 255 - WheelPos;  if(WheelPos < 85) {    return Color(255 - WheelPos * 3, 0, WheelPos * 3);  }  if(WheelPos < 170) {    WheelPos -= 85;    return Color(0, WheelPos * 3, 255 - WheelPos * 3);  }  WheelPos -= 170;  return Color(WheelPos * 3, 255 - WheelPos * 3, 0);}//彩虹void rainbow(unsigned int wait){  unsigned int i, j;  for(j=0; j<256; j++) {    for(i=0; i<numLEDs; i++){      SetPixelColor(i, Wheel((i+j) & 255));    }PixelUpdate();    HAL_Delay(wait);  }}//稍微不同的是，这使得彩虹均匀分布void rainbowCycle(unsigned int wait) {  unsigned int i, j;  for(j=0;j<256*5;j++) { // 5 cycles of all colors on wheel  车轮上所有颜色的5个循环    for(i=0;i<numLEDs;i++)  {     SetPixelColor(i, Wheel(((i * 256 / numLEDs) + j) & 255));    }  PixelUpdate();    HAL_Delay (wait);  }}//Theatre-style crawling lights.呼吸灯void theaterChase(unsigned long c, unsigned int wait) {int j,q;unsigned int i;  for (j=0; j<10; j++) {  //do 10 cycles of chasing  做10个循环    for (q=0; q < 3; q++) {      for (i=0; i<numLEDs; i=i+3){        SetPixelColor(i+q, c);    //turn every third pixel on  把每一个第三个像素      }PixelUpdate();      HAL_Delay(wait);      for (i=0; i<numLEDs; i=i+3) {       SetPixelColor(i+q, 0);        //turn every third pixel off   把每一个第三个像素关掉      }PixelUpdate();    }  }}//Theatre-style crawling lights with rainbow effect//带有彩虹效果的戏剧式爬行灯void theaterChaseRainbow(unsigned int wait) {int j,q;unsigned int i;  for (j=0; j < 256; j++) {     // cycle all 256 colors in the wheel 在轮子上循环所有256色    for (q=0; q < 3; q++){      for (i=0; i < numLEDs; i=i+3) {        SetPixelColor(i+q, Wheel( (i+j) % 255));    //turn every third pixel off 把每一个第三个像素      }      PixelUpdate();      HAL_Delay(wait);      for (i=0; i < numLEDs; i=i+3){        SetPixelColor(i+q, 0);        //turn every third pixel off  把每一个第三个像素关掉      }    }  }}// Fill the dots one after the other with a color//用一种颜色填充这些圆点void colorWipe(unsigned long c, unsigned int wait) {unsigned int i=0;  for( i=0; i<numLEDs; i++) {    SetPixelColor(i, c);    PixelUpdate();    HAL_Delay(wait);  }}void main(){  while(1){  rainbow(45);        rainbowCycle(40);        theaterChase(Color(0,0,255),80); // Blue  theaterChase(Color(0,255,0),80); // Blue  theaterChase(Color(255,0,0),80); // Blue    theaterChaseRainbow(40);colorWipe(255,255);}}

以上是全部代码