热门标签
热门文章
- 1STM32单片机基本原理与应用（四）
- 2你的服务器还安全吗?用户数据是否面临泄露风险?_服务器被攻击了用户有风险吗
- 3《Learning to Reweight Examples for Robust Deep Learning》笔记
- 4HardFault_Handler异常（死机）的处理
- 5爬虫-1-基础和urllib_编写一个程序,使用urllib爬取关于“大数据”的百度搜页面。
- 6【CSAPP】探究BombLab奥秘：Phase_2的解密与实战
- 7wxwidgets的多语言支持_wxcrafter切换语言
- 8完美平方数_完美平方数第 2020 个完美平方数是多少?
- 9MYSQL解决“plugin caching_sha2_password could not be loaded”
- 10通过 Desktop 学 Docker 也太简单了_docker desktop 4.26 使用
当前位置: article > 正文
STM32+PWM+DMA驱动WS2812彩灯模块（附源码）_stm32驱动ws2812
作者：我家自动化 | 2024-02-09 09:39:48
赞
踩
stm32驱动ws2812
WS2812模块介绍
WS2812是一颗数字LED灯珠，采用单总线通讯，每颗灯珠支持24bit的颜色控制，也即RGB888，信号线通过DIN输入，经过一颗灯珠之后，信号线上前24bit数据会被该灯珠锁存，之后将剩下的数据信号整形之后通过DOUT输出
经典电路
C1为VDD的滤波电容，一般大小为100NF。
实物展示
点亮灯光
// An highlighted block void controlMultipleLEDs() { // 控制LED 0 colors[0][0] = 255; // 设置为红色 colors[0][1] = 0; colors[0][2] = 0; // 控制LED 1 colors[1][0] = 0; // 设置为绿色 colors[1][1] = 255; colors[1][2] = 0; // 控制LED 2 colors[2][0] = 0; // 设置为蓝色 colors[2][1] = 255; colors[2][2] = 0; // 控制LED 3 colors[3][0] = 100; colors[3][1] = 200; colors[3][2] = 155; // 控制LED 4 colors[4][0] = 55; colors[4][1] = 0; colors[4][2] = 0; // 调用WS2812_Send函数发送颜色数据 WS2812_Send(colors, NUM_LEDS); }
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
WS2812.c
// An highlighted block #include "ws2812b.h" #include "stdlib.h" #include "delay.h" #define NUM_LEDS 10 // 假设有5个LED uint8_t colors[NUM_LEDS][3]; // 每个LED有3个颜色通道（RGB） 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 if(len>NUM_LEDS){// len=NUM_LEDS; //控制灯光的数量 } // 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 } //呼吸灯代码// 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_ms(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; } for(i=0;i<=255;i++) { WS2812_Send(&rgb0[i],1); delay_ms(5); } for(i=0;i<=255;i++) { rgb0[i][2] = (255 - i); } for(i=0;i<=255;i++) { WS2812_Send(&rgb0[i],1); delay_ms(5); } delay_ms(500); } //单色灯代码// //初始化灯光 void InitLED() { u16 i = 0; for (i = 0; i < NUM_LEDS; i++) { colors[i][0] = 255; // 红色通道 colors[i][1] = 0; // 绿色通道 colors[i][2] = 0; // 蓝色通道 // 调用WS2812_Send函数发送颜色数据 WS2812_Send(colors, NUM_LEDS); } delay_ms(1000); } void controlMultipleLEDs() { // 控制LED 0 colors[0][0] = 255; // 设置为红色 colors[0][1] = 0; colors[0][2] = 0; // 控制LED 1 colors[1][0] = 0; // 设置为绿色 colors[1][1] = 255; colors[1][2] = 0; // 控制LED 2 colors[2][0] = 0; // 设置为蓝色 colors[2][1] = 255; colors[2][2] = 0; // 控制LED 3 colors[3][0] = 100; // 设置为蓝色 colors[3][1] = 200; colors[3][2] = 155; // 控制LED 4 colors[4][0] = 55; // 设置为蓝色 colors[4][1] = 0; colors[4][2] = 0; // 调用WS2812_Send函数发送颜色数据 WS2812_Send(colors, NUM_LEDS); } void controlDiffentLEDs() { u16 i; u16 j; u16 a; u16 b; // 控制LED 0 for(i=0;i<255;i++){ for(a=100;a<255;a++){ for(b=255;b>0;b--){ for(j=0;j<NUM_LEDS;j++){ colors[j][0] = i; // 设置为红色 colors[j][1] = a; colors[j][2] = b; // 调用WS2812_Send函数发送颜色数据 WS2812_Send(colors, NUM_LEDS); delay_ms(1); } } } } }
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
- 66
- 67
- 68
- 69
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77
- 78
- 79
- 80
- 81
- 82
- 83
- 84
- 85
- 86
- 87
- 88
- 89
- 90
- 91
- 92
- 93
- 94
- 95
- 96
- 97
- 98
- 99
- 100
- 101
- 102
- 103
- 104
- 105
- 106
- 107
- 108
- 109
- 110
- 111
- 112
- 113
- 114
- 115
- 116
- 117
- 118
- 119
- 120
- 121
- 122
- 123
- 124
- 125
- 126
- 127
- 128
- 129
- 130
- 131
- 132
- 133
- 134
- 135
- 136
- 137
- 138
- 139
- 140
- 141
- 142
- 143
- 144
- 145
- 146
- 147
- 148
- 149
- 150
- 151
- 152
- 153
- 154
- 155
- 156
- 157
- 158
- 159
- 160
- 161
- 162
- 163
- 164
- 165
- 166
- 167
- 168
- 169
- 170
- 171
- 172
- 173
- 174
- 175
- 176
- 177
- 178
- 179
- 180
- 181
- 182
- 183
- 184
- 185
- 186
- 187
- 188
- 189
- 190
- 191
- 192
- 193
- 194
- 195
- 196
- 197
- 198
- 199
- 200
- 201
- 202
- 203
- 204
- 205
- 206
- 207
- 208
- 209
- 210
- 211
- 212
- 213
- 214
- 215
- 216
- 217
- 218
- 219
- 220
- 221
- 222
- 223
- 224
- 225
- 226
pwm.c
// An highlighted block #include "pwm.h" void TIM2_PWM_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); /* GPIOA Configuration: TIM2 Channel 1 as alternate function push-pull */ GPIO_PinRemapConfig(GPIO_FullRemap_TIM2, ENABLE); //TIM2选择全复用功能使能 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = arr; // 800kHz TIM_TimeBaseStructure.TIM_Prescaler = psc; TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); /* PWM4 Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = 0;//初始化占空比 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OC4Init(TIM2, &TIM_OCInitStructure); TIM_OC4PreloadConfig(TIM2,TIM_OCPreload_Enable);//修复DMA数据丢失 TIM_ARRPreloadConfig(TIM2,ENABLE);//ARPE使能 TIM_Cmd(TIM2, ENABLE); //使能TIM9 }
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
DMA.c
// An highlighted block #include "dma.h" uint16_t LED_BYTE_Buffer[300]; void TIM2_DMA_Init(void){ //DMA初始化设置 /* configure DMA */ DMA_InitTypeDef DMA_InitStructure;//定义DMA初始化结构体 /* DMA clock enable */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE); //使能DMA时钟（用于SPI的数据传输） /* DMA1 Channel7 Config for PWM4 by TIM2_CH4*/ DMA_DeInit(DMA1_Channel7); DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)TIM2_CCR4_Address; // physical address of Timer 3 CCR1 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)LED_BYTE_Buffer; // this is the buffer memory DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; // data shifted from memory to peripheral DMA_InitStructure.DMA_BufferSize = 300; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; // automatically increase buffer index DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; // stop DMA feed after buffer size is reached DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA1_Channel7, &DMA_InitStructure); /* TIM2 DMA Request enable */ TIM_DMACmd(TIM2, TIM_DMA_CC4, ENABLE); TIM_DMACmd(TIM2, TIM_DMA_Update, ENABLE); } void SPI2_DMA_Init(void){ //DMA初始化设置 /* configure DMA */ DMA_InitTypeDef DMA_InitStructure;//定义DMA初始化结构体 /* DMA clock enable */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE); //使能DMA时钟（用于SPI的数据传输） /* DMA1 Channel7 Config for PWM4 by TIM2_CH4*/ DMA_DeInit(DMA1_Channel5); DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(SPI2->DR); // physical address of Timer 3 CCR1 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)LED_BYTE_Buffer; // this is the buffer memory DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; // data shifted from memory to peripheral DMA_InitStructure.DMA_BufferSize = 300; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; // automatically increase buffer index DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; // stop DMA feed after buffer size is reached DMA_InitStructure.DMA_Priority = DMA_Priority_Medium; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA1_Channel5, &DMA_InitStructure); }
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
- 33
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45
- 46
- 47
- 48
- 49
- 50
- 51
- 52
- 53
- 54
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63
- 64
- 65
main.c
// An highlighted block #include "dma.h" #include "pwm.h" #include "delay.h" #include "ws2812b.h" #include "stm32f10x.h" #include "sys.h" //需要更改标准库中的sys.h和delay.h int main (void){ RCC_Configuration();//系统时钟初始化 TIM2_PWM_Init(77,0); //初始化PWM TIM2_DMA_Init(); //初始化DMA InitLED(); while(1){ //WS2812_Red_BLN(); //红色呼吸灯 // WS2812_Green_BLN(); //绿色呼吸灯 // WS2812_Blue_BLN(); //蓝色呼吸灯 // WS2812_Random(); //随机闪灯 //controlMultipleLEDs(); controlDiffentLEDs(); } }
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
- 29
- 30
- 31
- 32
需要源码可评论留言。
声明：本文内容由网友自发贡献，不代表【wpsshop博客】立场，版权归原作者所有，本站不承担相应法律责任。如您发现有侵权的内容，请联系我们。转载请注明出处：https://www.wpsshop.cn/w/我家自动化/article/detail/71113?site
推荐阅读
相关标签
