ws2812b芯片驅動程序

ID:576951 · 發表于 2019-7-3 10:36

ws2812b驅動程序

單片機源程序如下:

#include "bsp_ws2812b.h"
#include "bsp.h"
#define TIM4CCR1ADDR 0x40000834
#define TIM4CCR2ADDR 0x40000838
volatile uint8_t LEDbuffer[LED_BUFFER_SIZE];
static GPIO_InitTypeDef tim4ch1pwm =
{
.GPIO_Pin = GPIO_Pin_6,
.GPIO_Speed = GPIO_Speed_50MHz,
.GPIO_Mode = GPIO_Mode_AF_PP
};
static GPIO_InitTypeDef tim4ch2pwm =
{
.GPIO_Pin = GPIO_Pin_7,
.GPIO_Speed = GPIO_Speed_50MHz,
.GPIO_Mode = GPIO_Mode_AF_PP
};
static DMA_InitTypeDef dmachan1 =
{
.DMA_PeripheralBaseAddr = ( uint32_t )&TIM4->CCR1,
.DMA_MemoryBaseAddr = ( uint32_t ) ( &LEDbuffer[0] ),
.DMA_DIR = DMA_DIR_PeripheralDST,
.DMA_BufferSize = LED_BUFFER_SIZE + 1,
.DMA_PeripheralInc = DMA_PeripheralInc_Disable,
.DMA_MemoryInc = DMA_MemoryInc_Enable,
.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord,
.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte,
.DMA_Mode = DMA_Mode_Circular,
.DMA_Priority = DMA_Priority_High,
.DMA_M2M = DMA_M2M_Disable
};
static DMA_InitTypeDef dmachan4 =
{
.DMA_PeripheralBaseAddr = ( uint32_t )&TIM4->CCR2,
.DMA_MemoryBaseAddr = ( uint32_t ) ( &LEDbuffer[0] ),
.DMA_DIR = DMA_DIR_PeripheralDST,
.DMA_BufferSize = LED_BUFFER_SIZE + 1,
.DMA_PeripheralInc = DMA_PeripheralInc_Disable,
.DMA_MemoryInc = DMA_MemoryInc_Enable,
.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord,
.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte,
.DMA_Mode = DMA_Mode_Circular,
.DMA_Priority = DMA_Priority_High,
.DMA_M2M = DMA_M2M_Disable
};
static TIM_TimeBaseInitTypeDef tim4 =
{
.TIM_Period = TIMER_PERIOD - 1,
.TIM_Prescaler = 0,
.TIM_ClockDivision = TIM_CKD_DIV1,
.TIM_CounterMode = TIM_CounterMode_Up
};
static TIM_OCInitTypeDef timingmode =
{
.TIM_OCMode = TIM_OCMode_PWM1,
.TIM_OutputState = TIM_OutputState_Enable,
.TIM_Pulse = 0,
.TIM_OCPolarity = TIM_OCPolarity_High
};
/*************************************************************
* 函數名 : WS2812_Init
* 函數描述 : 初始化
* 返回值 : none
* 輸入參數 : none
* 輸出參數 : none
*************************************************************/
void WS2812_Init ()
{
RCC_APB2PeriphClockCmd ( RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE );
// RCC_APB2PeriphClockCmd ( RCC_APB2Periph_GPIOB, ENABLE );
RCC_APB1PeriphClockCmd ( RCC_APB1Periph_TIM4, ENABLE );
GPIO_Init ( GPIOB, &tim4ch1pwm );
GPIO_Init ( GPIOB, &tim4ch2pwm );
/* 初始化時基 */
TIM_TimeBaseInit ( TIM4, &tim4 );
/* 初始化channel1 */
TIM_OC1PreloadConfig ( TIM4, TIM_OCPreload_Enable );
TIM_OC1Init ( TIM4, &timingmode );
/* 初始化channel2 */
TIM_OC2PreloadConfig ( TIM4, TIM_OCPreload_Enable );
TIM_OC2Init ( TIM4, &timingmode );
// /* 初始化DMA1 */
RCC_AHBPeriphClockCmd ( RCC_AHBPeriph_DMA1, ENABLE );
/* 初始化DMA1通道 */
DMA_Init ( DMA1_Channel1, &dmachan1 );
DMA_Init ( DMA1_Channel4, &dmachan4 );
TIM_DMACmd ( TIM4, TIM_DMA_CC1, ENABLE );
TIM_DMACmd ( TIM4, TIM_DMA_CC2, ENABLE );
/* 使能DMA中斷 */
DMA_ITConfig ( DMA1_Channel1, DMA_IT_TC | DMA_IT_TE, ENABLE );
DMA_ITConfig ( DMA1_Channel4, DMA_IT_TC | DMA_IT_TE, ENABLE );
// TIM_Cmd ( TIM4, ENABLE );
}
/*************************************************************
* 函數名 : WS2812_update
* 函數描述 : DMA發送數據
* 輸入參數 : none
* 輸出參數 : none
* 返回值 : none
*************************************************************/
void WS2812_update ( uint8_t group )
{
TIM_Cmd ( TIM4, ENABLE );
if ( group == GROUP_A ) // GROUP_A只有1盞LED燈
{
DMA_SetCurrDataCounter ( DMA1_Channel1, LED_BUFFER_SIZE );
DMA_Cmd ( DMA1_Channel1, ENABLE );
TIM_DMACmd ( TIM4, TIM_DMA_Update, ENABLE ); // 使能TIM4 DMA請求
}
else
{
DMA_SetCurrDataCounter ( DMA1_Channel4, LED_BUFFER_SIZE );
DMA_Cmd ( DMA1_Channel4, ENABLE );
TIM_DMACmd ( TIM4, TIM_DMA_Update, ENABLE ); // 使能TIM4 DMA請求
}
}
/*************************************************************
* 函數名 : SetLedColor
* 函數描述 : 設置某一盞LED顏色
* 輸入參數 : index 需要點亮的LED序號（第一盞、第二盞.....）
* 輸出參數 : none
* 返回值 : none
*************************************************************/
void SetLedColor ( uint8_t index, uint8_t RED, uint8_t GREEN, uint8_t BLUE )
{
uint8_t tempBuffer[24] = {0};
uint8_t i;
for ( i = 0; i < 8; i++ ) // GREEN data
tempBuffer[i] = ( ( GREEN << i ) & 0x80 ) ? WS2812_1 : WS2812_0;
for ( i = 0; i < 8; i++ ) // RED
tempBuffer[8 + i] = ( ( RED << i ) & 0x80 ) ? WS2812_1 : WS2812_0;
for ( i = 0; i < 8; i++ ) // BLUE
tempBuffer[16 + i] = ( ( BLUE << i ) & 0x80 ) ? WS2812_1 : WS2812_0;
for ( i = 0; i < 24; i++ )
LEDbuffer[RESET_SLOTS_BEGIN + index * 24 + i] = tempBuffer[i];
}
void SetWholeColor ( uint8_t group, uint8_t red, uint8_t green, uint8_t blue )
{
uint32_t index;
if ( group == GROUP_A ) // GROUP_A只有一盞LED燈
{
// SetLedColor ( 0, RED, GREEN, BLUE );
for ( index = 0; index < LED_NUMBER; index++ )
SetLedColor ( index, red, green, blue );
}
else
{
for ( index = 0; index < LED_NUMBER; index++ )
SetLedColor ( index, red, green, blue );
}
}
/****************************************************************
* 函數名：DMA1_Channel1_IRQHandler
* 函數描述：channel1中斷處理
* 輸入參數：none
* 輸出參數：none
* 返回類型：void
*****************************************************************/
void DMA1_Channel1_IRQHandler()
{
OSIntEnter();
TIM_Cmd ( TIM4, DISABLE );
TIM_DMACmd ( TIM4, TIM_DMA_Update, DISABLE ); // 禁止請求
DMA_Cmd ( DMA1_Channel1, DISABLE );
DMA_ClearFlag ( DMA1_FLAG_TC1 );
memset ( ( char * ) LEDbuffer, 0, LED_BUFFER_SIZE );
……………………
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ID:59830 · 發表于 2020-5-6 17:22

手上一塊 8個WS2812彩燈，沒有資料不知道怎么驅動，想找一下資料。參考一下.謝謝你的分享

ID:877820 · 發表于 2021-1-15 14:55

參考一下

ID:861657 · 發表于 2021-1-27 10:03

16個WS2812也可以驅動嗎

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ws2812b芯片驅動程序