ws2812B+单片机驱动
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效果
呼吸
流水
跑马
随机灯带
WS2812B 驱动
数据协议
采用单线归零码，每个像素点(灯),在接受到自己的24bit数据后，将剩下的数据再处理放大后，发出去，也就是每经过一个点，数据少24bit。
| RES | 帧单位,低电平时间 | 330us以上 |
|---|---|---|
| T0L | 0码,低电平时间 | 750ns~1.6us |
| T0H | 0码，高电平时间 | 220ns~420ns |
| T1H | 1码,高电平时间 | 750ns~1.6us |
| T1L | 0码,低电平时间 | 220ns~420ns |
注意一点就行了:比例3：1,
比如:
T0L 750ns
则
T0H 250ns
其对时序要求还是很高的，因此一定要满足要求，不要再数据发的过程中做一些耗时的操作
24bit数据结构
|G7|G6|G5|G4|G3|G2|G1|G0|R7|R6|R5|R4|R3|R2|R1|R0|B7|B6|B5|B4|B3|B2|B1|B0|
高位在前,按照GRB顺序
程序
注意stc15的话，该程序的晶振需设置为24M
main.c
#include <stc15f2k60s2.h>
#include <stdio.h>
#include "ws.h"
#include <INTRINS.H>
#define uchar unsigned char
#define uint unsigned int
#define LEDCNT 50 //灯的数目
sbit k1 = P3^0; //按键一 控制模式
sbit k2 = P3^1; //按键二 关闭灯光
//成员依次为计时最大值，计时数，是否完成计时
typedef struct delay
uint max;
uint cnt;
uchar ok;
t_delay;
//灯的切换速度(因为定时器是2ms，所以300*2=600ms,以下同理)
t_delay delaytime = 300, 0, 0;
//流水灯的速度(可以设置一个变量然后使用按键控制,都是可以的)
t_delay liushui_time = 30, 0, 0;
//呼吸灯呼吸的速度
t_delay huxi_time = 100, 0, 0;
//GRB
//流水灯流完一次改变颜色
code ws_t wsData[] = 255,0, 0, 0, 255, 0, 0, 0, 250;
//跑马灯的设置
code ws_t PAOMACODE[] = 255, 0, 0, 0, 255, 0, 0, 0, 255;
unsigned int SEED = 0;//随机数种子
//当前按键值，上一次按键值，按键计数
uchar key, tmpKey, keyCnt;
enum
K_GT,
K_AS,
K_WA
keyState = K_GT;
enum
HUXI,
LIUSHUI,
PAOMA,
SUIJI,
XIMIE
gloState = LIUSHUI;
//单次获取按键
uchar GetKey()
if (k1 == 0)
return 1;
else if(k2 == 0)
return 2;
return 0;
//自我设定定时器运行
void TimeRun(t_delay *time)
if (time->cnt++ < time->max)
;
else
time->cnt = 0;
time->ok = 1;
void Timer1Init(void) // 2毫秒@12.000MHz
AUXR |= 0x40; //定时器时钟1T模式
TMOD &= 0x0F; //设置定时器模式
TL1 = 0x80; //设置定时初值
TH1 = 0x44; //设置定时初值
TF1 = 0; //清除TF1标志
TR1 = 1; //定时器1开始计时
ET1 = 1;
//为了调试用的
void UartInit(void)
SCON = 0x50;
AUXR |= 0x01;
AUXR |= 0x04;
T2L = 0xE0;
T2H = 0xFE;
AUXR |= 0x10;
ES = 0;
void Timer1Handle() interrupt 3
switch (keyState)
case K_GT:
tmpKey = GetKey();
keyState = K_AS;
keyCnt = 0;
break;
case K_AS:
if (keyCnt++ < 10);
else if (tmpKey == GetKey())
if (tmpKey != key)
key = tmpKey;
keyState = K_WA;
else
keyState = K_GT;
else
keyState = K_GT;
break;
//在定时器中计算一个定时
TimeRun(&delaytime);
TimeRun(&liushui_time);
TimeRun(&huxi_time);
void Liushui()
static uchar i = 0;
static uchar color = 0;
if(liushui_time.ok == 1)
liushui_time.ok = 0;
SendLiushui(LEDCNT, i, wsData[color]);
i = (i + 1)%LEDCNT;
if(i == 0)
color = (color + 1)%3;
void Paoma()
static uchar i = 0;
if(delaytime.ok == 1)
delaytime.ok = 0;
SendPaoma(LEDCNT, PAOMACODE[i]);
i = (i + 1)%3;
void Suiji()
if(delaytime.ok == 1)
delaytime.ok = 0;
SendSuiji(LEDCNT);
void Huxi()
static uchar i = 0;
if(huxi_time.ok == 1)
huxi_time.ok = 0;
SendHuxi(LEDCNT, i);
i = (i + 1)%30;
void main()
Timer1Init();
UartInit();
EA = 1;
while (1)
switch(gloState)
case LIUSHUI:
Liushui();
break;
case PAOMA:
Paoma();
break;
case SUIJI:
Suiji();
break;
case HUXI:
Huxi();
break;
if(keyState == K_WA)
if(key == 1)
if(gloState == XIMIE)
gloState = HUXI;
else
gloState = (gloState + 1)%4;
else if(key == 2)//如果按键二按下，则熄灭全部灯
SendXime(LEDCNT);
gloState = XIMIE;
keyState = K_GT;
ws.c
#include <STC15F2K60S2.H>
#include <INTRINS.H>
#include <stdio.h>
#include <stdlib.h>
#include "ws.h"
sbit LED = P2^4; //灯带的数据输入
//呼吸灯的值(这部分可以写一个RGB2HSV转换，这里我直接查找的值)
code ws_t HUXICODE[] = 32,11,227, 29,10,201,23,7,165, 21,7,143, 17,5,122,15,5,101,12,4,81, 6,2,43, 3,1,18, 0,0,0,
31,219,4, 27,188,3,23,167,3, 21,146,3, 18,125,2,15,104,2,12,84,1, 7,52,1, 5,33,1, 0,0,0,
218,100,3, 188,86,3,167,77,3, 149,68,2, 125,57,2,104,48,2,84,38,1, 63,29,1, 26,12,0, 0,0,0;
//每一帧至少的间隙
void Delay300us() //@24.000MHz
unsigned char i, j;
i = 1;
j = 146;
do
while (--j);
while (--i);
//发送24个bit数据
void WS_SendData(ws_t *_data)
uchar i = 0;
uchar j = 0;
uchar *p = (uchar*)_data;
EA = 0;
for (i = 0; i < 3; i++)
uchar tmpData;
tmpData = *(p++);
for (j = 0; j < 8; j++)
if (((tmpData>>(7-j)) & 0x01) == 0)
LED = 1;
_nop_();_nop_();_nop_();
LED = 0;
_nop_();_nop_();_nop_();_nop_();_nop_(); _nop_();_nop_();_nop_();_nop_();
else
LED = 1;
_nop_();_nop_();_nop_();_nop_();_nop_(); _nop_();_nop_();_nop_();_nop_();
LED = 0;
_nop_();_nop_();_nop_();
EA = 1;
//流水灯
//总个数，哪一个灯亮，亮什么值
void SendLiushui(uchar num,uchar whichLight, ws_t _data)
uint i = 0;
ws_t ximieValue = 0, 0, 0;
for(i = 0; i< num+1; i++)
//到该亮的地方才亮
if((i >= whichLight) && (i <= whichLight + 5))
WS_SendData(&_data);
else
WS_SendData(&ximieValue);
Delay300us();
//熄灭所有灯
void SendXime(uchar num)
uint i = 0;
ws_t ximieValue = 0, 0, 0;
for(i = 0; i< num+1; i++)
WS_SendData(&ximieValue);
LED = 0;
Delay300us();
//跑马灯
void SendPaoma(uchar num, ws_t _data)
static uchar start = 0;
uint i = 0;
ws_t ximieValue = 0, 0, 0;
for(i = 0; i< num+1; i++)
//一半亮一半不亮
if((i%2) == start)
WS_SendData(&_data);
else
WS_SendData(&ximieValue);
start = (start + 1)%2;
Delay300us();
void SendSuiji(uchar num)
uint i = 0;
for(i = 0; i< num+1; i++)
//随机颜色
ws_t suijiValue = 0,0,0;
suijiValue.green = SEED>>8;
suijiValue.red = SEED;
suijiValue.blue = ~SEED;
SEED = SEED + 455;
WS_SendData(&suijiValue);
Delay300us();
//根据已经设定的值来亮
void SendHuxi(uchar num, uchar lightLevel)
uint i = 0;
for(i = 0; i< num+1; i++)
WS_SendData(&HUXICODE[lightLevel]);
Delay300us();
ws.h
#ifndef _WS_H
#define _WS_H
#define uchar unsigned char
#define uint unsigned int
extern unsigned int SEED;//随机种子
typedef struct ws
uchar green;
uchar red;
uchar blue;
ws_t;
void WS_SendData(ws_t* _data);
void SendLiushui以上是关于ws2812B+单片机驱动的主要内容，如果未能解决你的问题，请参考以下文章