STM32F103+WS2812调试问题（DMA+PWM）

2019-07-21 08:17发布

前段时间在学习DMA，想着有RGB灯珠，就开始写WS2812的驱动，但是昨晚进硬件故障中断里面，但在句子前面加了大括号就好了，现在能发光，但是不能改变颜 {MOD}是哪里出问题了[mw_shl_code=c,true]
#define H0 25
#define H1 50

u8 buff[24]={0};

void WS2812_init()//ws2812³õÊ¼»¯Òý½Å£¬¶¨Ê±Æ÷(PWM)£¬DMA£¬ÖÐ¶Ï
{
GPIO_InitTypeDef  GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);
//GPIO_PinRemapConfig(GPIO_Remap_TIM4,ENABLE);

//ÆµÂÊ=72M/((arr+1)*(psc+1))(µ¥Î»£ºHz)
TIM_TimeBaseStructure.TIM_Period = 89;//90    800KHz 1.25us 1ÖÜÆÚ
TIM_TimeBaseStructure.TIM_Prescaler = 0;//1
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;//0£»Ê±ÖÓ·Ö¸î
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//ÏòÉÏ¼ÆÊýÄ£Ê½
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;//ÖØ¸´¼ÆÊýÖµ
TIM_TimeBaseInit(TIM4,&TIM_TimeBaseStructure);

//TIMÊä³ö±È½Ï¹¦ÄÜ
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//Ñ¡Ôñ¶¨Ê±Æ÷Ä£Ê½:TIMÂö³å¿í¶Èµ÷ÖÆÄ£Ê½1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//±È½ÏÊä³öÊ¹ÄÜ
TIM_OCInitStructure.TIM_Pulse = 0;//ÉèÖÃ´ý×°Èë²¶»ñ±È½Ï¼Ä´æÆ÷µÄÂö³åÖµ
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;////Êä³ö¼«ÐÔ:TIMÊä³ö±È½Ï¼«ÐÔ¸ß
TIM_OC1Init(TIM4,&TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM4,TIM_OCPreload_Enable);//Ê¹ÄÜTIM4 PWM CH1
TIM_DMACmd(TIM4,TIM_DMA_CC1,ENABLE);//Ê¹ÓÃTIM4 CCR1 DMA
//TIM_Cmd(TIM4,ENABLE);

//DMA1 ÅäÖÃ
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&TIM4->CCR1;//Ä¿±êµØÖ·ÎªTIM4CCR1¼Ä´æÆ÷
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)buff;//Êý¾Ý´æ´¢µØÖ·
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//ÄÚ´æµØÖ·¼Ä´æÆ÷µÝÔö
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//ÍâÉèµØÖ·¼Ä´æÆ÷²»±ä
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;//ÍâÉèÊý¾Ý¿í¶È8Î»
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//Êý¾Ý¿í¶ÈÎª8Î»
DMA_InitStructure.DMA_BufferSize = 30*LEN;//DMAÍ¨µÀ»º´æ´óÐ¡
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;//Êý¾Ý´«Êä·½Ïò´ÓÄÚ´æµ½ÍâÉè
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//¹¤×÷Ä£Ê½->Ñ»·Ä£Ê½.(Õý³£Ä£Ê½)
DMA_InitStructure.DMA_Priority = DMA_Priority_High;//DMAÍ¨µÀÓÅÏÈ¼¶
DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;//²»Ê¹ÓÃÄÚ´æµ½ÄÚ´æ´«Êä
DMA_Init(DMA1_Channel1,&DMA_InitStructure);//Í¨µÀ1³õÊ¼»¯
DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE);//DMAÍ¨µÀ1´«ÊäÍê³ÉÖÐ¶Ï

NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 8;//ÇÀÕ¼
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;//Ë³´Ó
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

}
//buf:Êý¾Ý´æ´¢µØ
//color:ÐèÒªÊä³öµÄÑÕÉ«
void fill_led(u8 *buf,u8 *color)
{
int i;
for(i=0;i<8;i++)//green
buf=((color[1]<<i) & 0x80) ? H1:H0;
for(i=0;i<8;i++)//red
buf[8+i]=((color[0]<<i) & 0x80) ? H1:H0;
for(i=0;i<8;i++)//blue
buf[16+i]=((color[2]<<i) & 0x80) ? H1:H0;
}
//¿ªÆôDMA´«Êä
void ws2812_send(u8 (*color)[3])
{
u8 i;
for(i=0;i<3;i++)
fill_led(buff,color);
DMA_Cmd(DMA1_Channel1,ENABLE);
TIM_Cmd(TIM4,ENABLE);
}
/*void ws2812_send(u8 (*color)[3])
{
u8 i;
for(i=0;i<3;i++)
fill_led(buff,color);
}*/

void DMA1_Channel1_IRQHandler(void)
{
if(DMA_GetITStatus(DMA1_IT_TC1)==SET)
{
DMA_ClearITPendingBit(DMA1_IT_TC1);

DMA_Cmd(DMA1_Channel1,DISABLE);
TIM_Cmd(TIM4,DISABLE);
delay_us(55);
}
}
#define H0 25
#define H1 50

u8 buff[24]={0};

void WS2812_init()//ws2812³õÊ¼»¯Òý½Å£¬¶¨Ê±Æ÷(PWM)£¬DMA£¬ÖÐ¶Ï
{
GPIO_InitTypeDef  GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure);
//GPIO_PinRemapConfig(GPIO_Remap_TIM4,ENABLE);

//ÆµÂÊ=72M/((arr+1)*(psc+1))(µ¥Î»£ºHz)
TIM_TimeBaseStructure.TIM_Period = 89;//90    800KHz 1.25us 1ÖÜÆÚ
TIM_TimeBaseStructure.TIM_Prescaler = 0;//1
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;//0£»Ê±ÖÓ·Ö¸î
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//ÏòÉÏ¼ÆÊýÄ£Ê½
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;//ÖØ¸´¼ÆÊýÖµ
TIM_TimeBaseInit(TIM4,&TIM_TimeBaseStructure);

//TIMÊä³ö±È½Ï¹¦ÄÜ
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//Ñ¡Ôñ¶¨Ê±Æ÷Ä£Ê½:TIMÂö³å¿í¶Èµ÷ÖÆÄ£Ê½1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//±È½ÏÊä³öÊ¹ÄÜ
TIM_OCInitStructure.TIM_Pulse = 0;//ÉèÖÃ´ý×°Èë²¶»ñ±È½Ï¼Ä´æÆ÷µÄÂö³åÖµ
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;////Êä³ö¼«ÐÔ:TIMÊä³ö±È½Ï¼«ÐÔ¸ß
TIM_OC1Init(TIM4,&TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM4,TIM_OCPreload_Enable);//Ê¹ÄÜTIM4 PWM CH1
TIM_DMACmd(TIM4,TIM_DMA_CC1,ENABLE);//Ê¹ÓÃTIM4 CCR1 DMA
//TIM_Cmd(TIM4,ENABLE);

//DMA1 ÅäÖÃ
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&TIM4->CCR1;//Ä¿±êµØÖ·ÎªTIM4CCR1¼Ä´æÆ÷
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)buff;//Êý¾Ý´æ´¢µØÖ·
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//ÄÚ´æµØÖ·¼Ä´æÆ÷µÝÔö
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//ÍâÉèµØÖ·¼Ä´æÆ÷²»±ä
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;//ÍâÉèÊý¾Ý¿í¶È8Î»
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//Êý¾Ý¿í¶ÈÎª8Î»
DMA_InitStructure.DMA_BufferSize = 30*LEN;//DMAÍ¨µÀ»º´æ´óÐ¡
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;//Êý¾Ý´«Êä·½Ïò´ÓÄÚ´æµ½ÍâÉè
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//¹¤×÷Ä£Ê½->Ñ»·Ä£Ê½.(Õý³£Ä£Ê½)
DMA_InitStructure.DMA_Priority = DMA_Priority_High;//DMAÍ¨µÀÓÅÏÈ¼¶
DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;//²»Ê¹ÓÃÄÚ´æµ½ÄÚ´æ´«Êä
DMA_Init(DMA1_Channel1,&DMA_InitStructure);//Í¨µÀ1³õÊ¼»¯
DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE);//DMAÍ¨µÀ1´«ÊäÍê³ÉÖÐ¶Ï

NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 8;//ÇÀÕ¼
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;//Ë³´Ó
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

}
//buf:Êý¾Ý´æ´¢µØ
//color:ÐèÒªÊä³öµÄÑÕÉ«
void fill_led(u8 *buf,u8 *color)
{
int i;
for(i=0;i<8;i++)//green
buf=((color[1]<<i) & 0x80) ? H1:H0;
for(i=0;i<8;i++)//red
buf[8+i]=((color[0]<<i) & 0x80) ? H1:H0;
for(i=0;i<8;i++)//blue
buf[16+i]=((color[2]<<i) & 0x80) ? H1:H0;
}
//¿ªÆôDMA´«Êä
void ws2812_send(u8 (*color)[3])
{
u8 i;
for(i=0;i<3;i++)
fill_led(buff,color);
DMA_Cmd(DMA1_Channel1,ENABLE);
TIM_Cmd(TIM4,ENABLE);
}
/*void ws2812_send(u8 (*color)[3])
{
u8 i;
for(i=0;i<3;i++)
fill_led(buff,color);
}*/

void DMA1_Channel1_IRQHandler(void)
{
if(DMA_GetITStatus(DMA1_IT_TC1)==SET)
{
DMA_ClearITPendingBit(DMA1_IT_TC1);

DMA_Cmd(DMA1_Channel1,DISABLE);
TIM_Cmd(TIM4,DISABLE);
delay_us(55);
}
}[/mw_shl_code]

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5条回答

正点原子
1楼-- · 2019-07-21 13:53

参考这里：http://www.openedv.com/forum.php ... ighlight=ATK-RGBLED

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正点原子
2楼-- · 2019-07-21 17:36

精彩回答 2 元偷偷看……

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way7539512
3楼-- · 2019-07-21 21:38

谢谢原子哥，现在还是没有成功，求助

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way7539512
4楼-- · 2019-07-21 22:25

谢谢原子哥找的连接，正在学习中。

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宋宋
5楼-- · 2019-07-22 00:09

原子哥，这个STM32F103C8T6 对接10个IO的灯圈（一个灯圈包含4颗灯珠WS2812） + 一个灯带 (一个灯带包含70颗灯珠) + 3路串口同时运行，使用3.0的库的话整个能运行么

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