Unidad de 16 canales WS2812B con problema STM32

Creo que, hasta que reduzcas el tamaño del problema, tendrás dificultades. No podemos hacer magia. (Es poco probable que alguien en la comunidad configure un sistema similar, especialmente sin esquemas y tal vez fotos, y encuentre el error).

Por lo tanto, solo podemos trabajar con el código que publica y la información en su pregunta.

Elimina todo lo extra del programa. Retire el otro DMA, temporizadores adicionales, etc.

Si el único problema es que algún pin no cambia, entonces no es necesario conducir el WS2812, así que retírelo también.

AFAICT, todo lo que necesita para probar esto son algunos LED tontos en los pines que no parecen cambiar, un temporizador, el controlador DMA y algunos datos de prueba.

Reduciendo el problema al caso más pequeño que demuestra que el problema no es que yo sea flojo y te pida que hagas un trabajo innecesario.

El proceso de reducir un sistema a su caso más simple es una técnica de resolución de problemas muy poderosa. Pasar por ese proceso puede ser suficiente para que usted mismo descubra los errores. Al menos, reducir la complejidad del sistema debería eliminar algunas fuentes potenciales de errores, lo que ayudará a la comunidad a ayudarlo.

Finalmente encontré el error en la biblioteca.

equivocado:

DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)WS2812_IO_High; //("&" mistaked)

verdadero:

DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&WS2812_IO_High;

Aquí está la biblioteca correcta completa para WS2812B.c

    //WS2812B.c

#include "stm32f10x.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_tim.h"
#include "stm32f10x_dma.h"


#define WS2812_DEADPERIOD 19
uint16_t WS2812_IO_High = 0xFFFF;
uint16_t WS2812_IO_Low = 0x0000;
volatile uint8_t WS2812_TC = 1;
volatile uint8_t TIM4_overflows = 0;
uint16_t WS2812_IO_framedata[6144];  //WS2812 framebuffer    buffersize = (#LEDs / 16) * 24 

uint8_t allow_update=0;

void GPIOB_init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure; 
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
    GPIO_PinRemapConfig(GPIO_Remap_SWJ_NoJTRST, ENABLE);    
    GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); 
    GPIO_InitStructure.GPIO_Pin = 0xFFFF;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void TIM4_init(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    uint16_t PrescalerValue;

    // TIM4 Periph clock enable
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

    PrescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;
    /* Time base configuration */
    TIM_TimeBaseStructure.TIM_Period = 29; // 800kHz
    TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

    TIM_ARRPreloadConfig(TIM4, DISABLE);

    /* Timing Mode configuration: Channel 1 */
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable;
    TIM_OCInitStructure.TIM_Pulse = 8;
    TIM_OC1Init(TIM4, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Disable);  

    /* Timing Mode configuration: Channel 2 */
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable;
    TIM_OCInitStructure.TIM_Pulse = 17;
    TIM_OC2Init(TIM4, &TIM_OCInitStructure);
    TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Disable);

    /* configure TIM4 interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}



/* Transmit the frambuffer with buffersize number of bytes to the LEDs 
 * buffersize = (#LEDs / 16) * 24 */
void WS2812_sendbuf(uint32_t buffersize)
{       
    // transmission complete flag, indicate that transmission is taking place
    WS2812_TC = 0;

    // clear all relevant DMA flags
    DMA_ClearFlag(DMA1_FLAG_TC7 | DMA1_FLAG_HT7 | DMA1_FLAG_GL7 | DMA1_FLAG_TE7);
    DMA_ClearFlag(DMA1_FLAG_TC1 | DMA1_FLAG_HT1 | DMA1_FLAG_GL1 | DMA1_FLAG_TE1);
    DMA_ClearFlag(DMA1_FLAG_HT4 | DMA1_FLAG_GL4 | DMA1_FLAG_TE4);

    // configure the number of bytes to be transferred by the DMA controller
    DMA_SetCurrDataCounter(DMA1_Channel7, buffersize);                              //dma channel 2 --> 7
    DMA_SetCurrDataCounter(DMA1_Channel1, buffersize);                              //dma channel 5 --> 1        
    DMA_SetCurrDataCounter(DMA1_Channel4, buffersize);                              //dma channel 7 --> 4        

    // clear all TIM4 flags
    TIM4->SR = 0;

    // enable the corresponding DMA channels
    DMA_Cmd(DMA1_Channel7, ENABLE);
    DMA_Cmd(DMA1_Channel1, ENABLE);
    DMA_Cmd(DMA1_Channel4, ENABLE);

    // IMPORTANT: enable the TIM4 DMA requests AFTER enabling the DMA channels!
    TIM_DMACmd(TIM4, TIM_DMA_CC1, ENABLE);
    TIM_DMACmd(TIM4, TIM_DMA_CC2, ENABLE);
    TIM_DMACmd(TIM4, TIM_DMA_Update, ENABLE);

    // preload counter with 29 so TIM4 generates UEV directly to start DMA transfer
    TIM_SetCounter(TIM4, 29);

    // start TIM4
    TIM_Cmd(TIM4, ENABLE);
}

/* DMA1 Channel7 Interrupt Handler gets executed once the complete framebuffer has been transmitted to the LEDs */
void DMA1_Channel4_IRQHandler(void)
{
    // clear DMA7 transfer complete interrupt flag
    DMA_ClearITPendingBit(DMA1_IT_TC4); 
    // enable TIM4 Update interrupt to append 50us dead period
    TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);
    // disable the DMA channels
    DMA_Cmd(DMA1_Channel7, DISABLE);    
    DMA_Cmd(DMA1_Channel1, DISABLE);
    DMA_Cmd(DMA1_Channel4, DISABLE);
    // IMPORTANT: disable the DMA requests, too!
    TIM_DMACmd(TIM4, TIM_DMA_CC1, DISABLE);
    TIM_DMACmd(TIM4, TIM_DMA_CC2, DISABLE);
    TIM_DMACmd(TIM4, TIM_DMA_Update, DISABLE);
}

/* TIM4 Interrupt Handler gets executed on every TIM4 Update if enabled */
void TIM4_IRQHandler(void)
{
    // Clear TIM4 Interrupt Flag
    TIM_ClearITPendingBit(TIM4, TIM_IT_Update);

    /* check if certain number of overflows has occured yet 
     * this ISR is used to guarantee a 50us dead time on the data lines
     * before another frame is transmitted */
    if (TIM4_overflows < (uint8_t)WS2812_DEADPERIOD)
    {
        // count the number of occured overflows
        TIM4_overflows++;
    }
    else
    {
        // clear the number of overflows
        TIM4_overflows = 0; 
        // stop TIM4 now because dead period has been reached
        TIM_Cmd(TIM4, DISABLE);
        /* disable the TIM4 Update interrupt again 
         * so it doesn't occur while transmitting data */
        TIM_ITConfig(TIM4, TIM_IT_Update, DISABLE);
        // finally indicate that the data frame has been transmitted
        WS2812_TC = 1;  
    }
}

/* This function sets the color of a single pixel in the framebuffer 
 * 
 * Arguments:
 * row = the channel number/LED strip the pixel is in from 0 to 15
 * column = the column/LED position in the LED string from 0 to number of LEDs per strip
 * red, green, blue = the RGB color triplet that the pixel should display 
 */
void WS2812_framedata_setPixel(uint8_t row, uint16_t column, uint8_t red, uint8_t green, uint8_t blue)
{
    uint8_t i;
    for (i = 0; i < 8; i++)
    {
        // clear the data for pixel 
        WS2812_IO_framedata[((column*24)+i)] &= ~(0x01<<row);
        WS2812_IO_framedata[((column*24)+8+i)] &= ~(0x01<<row);
        WS2812_IO_framedata[((column*24)+16+i)] &= ~(0x01<<row);
        // write new data for pixel
        WS2812_IO_framedata[((column*24)+i)]    |= ((((green<<i) & 0x80)>>7)<<row);
        WS2812_IO_framedata[((column*24)+8+i)]  |= ((((red<<i)   & 0x80)>>7)<<row);
        WS2812_IO_framedata[((column*24)+16+i)] |= ((((blue<<i)  & 0x80)>>7)<<row);
    }
}

/* This function is a wrapper function to set all LEDs in the complete row to the specified color
 * 
 * Arguments:
 * row = the channel number/LED strip to set the color of from 0 to 15
 * columns = the number of LEDs in the strip to set to the color from 0 to number of LEDs per strip
 * red, green, blue = the RGB color triplet that the pixels should display 
 */
void WS2812_framedata_setRow(uint8_t row, uint16_t columns, uint8_t red, uint8_t green, uint8_t blue)
{
    uint8_t i;
    for (i = 0; i < columns; i++)
    {
        WS2812_framedata_setPixel(row, i, red, green, blue);
    }
}

void WS2812_framedata_setChannel(uint8_t Channel, uint8_t red, uint8_t green, uint8_t blue)
{
    uint16_t i;
    for (i = 0; i < 256; i++)
    {
        WS2812_framedata_setPixel(Channel, i, red, green, blue);
    }
}

/* This function is a wrapper function to set all the LEDs in the column to the specified color
 * 
 * Arguments:
 * rows = the number of channels/LED strips to set the row in from 0 to 15
 * column = the column/LED position in the LED string from 0 to number of LEDs per strip
 * red, green, blue = the RGB color triplet that the pixels should display 
 */
void WS2812_framedata_setColumn(uint8_t rows, uint16_t column, uint8_t red, uint8_t green, uint8_t blue)
{
    uint8_t i;
    for (i = 0; i < rows; i++)
    {
        WS2812_framedata_setPixel(i, column, red, green, blue);
    }
}


void DMA_init(void)   //port b için 
{
    DMA_InitTypeDef DMA_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    // TIM4 Update event
    /* DMA1 Channel2 configuration ----------------------------------------------*/
    DMA_DeInit(DMA1_Channel7);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&GPIOB->ODR;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&WS2812_IO_High;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = 0;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel7, &DMA_InitStructure);

    // TIM4 CC1 event
    /* DMA1 Channel1 configuration ----------------------------------------------*/
    DMA_DeInit(DMA1_Channel1);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&GPIOB->ODR;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&WS2812_IO_framedata;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = 0;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel1, &DMA_InitStructure);

    // TIM4 CC2 event
    /* DMA1 Channel7 configuration ----------------------------------------------*/
    DMA_DeInit(DMA1_Channel4);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&GPIOB->ODR;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&WS2812_IO_Low;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = 0;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel4, &DMA_InitStructure);

    /* configure DMA1 Channel7 interrupt */
    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
    /* enable DMA1 Channel7 transfer complete interrupt */
    DMA_ITConfig(DMA1_Channel4, DMA_IT_TC, ENABLE);
}

uint8_t Get_WS2812_TC()
{
  return  WS2812_TC;
}


void WS2812B_Init()
  {
      GPIOB_init();
      DMA_init();
      TIM4_init();
  }

y WS2812B.h:

    void WS2812_sendbuf(uint32_t buffersize);
void WS2812_framedata_setPixel(uint8_t row, uint16_t column, uint8_t red, uint8_t green, uint8_t blue);
void WS2812_framedata_setRow(uint8_t row, uint16_t columns, uint8_t red, uint8_t green, uint8_t blue);
void WS2812_framedata_setColumn(uint8_t rows, uint16_t column, uint8_t red, uint8_t green, uint8_t blue);
void WS2812B_Init();
uint8_t Get_WS2812_TC();

finalmente mi main.c simple como referencia

    //Bismillah.

#include "WS2812B.h"


uint16_t led=0;
uint16_t ch=0;


int main()  
{  
  WS2812B_Init();

  for (ch=0;ch<16;ch++)
  {
      for(led=0;led<100;led++)
      {
          WS2812_framedata_setPixel(ch,led,255,255,255);  //set all led to white
      }
  }
      WS2812_sendbuf(2400);   
      while(!Get_WS2812_TC());
}