文章目录
- 效果
- 呼吸
- 流水
- 跑马
- 随机灯带
- WS2812B 驱动
- 数据协议
- 24bit数据结构
- 程序
- main.c
- ws.c
- ws.h
- 待做
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;}elsekeyState = K_GT;}elsekeyState = 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 intextern 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(uchar num,uchar whichLight, ws_t _data);
void SendXime(uchar num);
void SendPaoma(uchar num, ws_t _data);
unsigned int random(unsigned int xxx);
void SendSuiji(uchar num);
void SendHuxi(uchar num, uchar lightLevel);
#endif
待做
RGB2HSV
