Hi there,
i start to use aSTM32G031 Nucleo with some W2812b . I configure timer1 PWM output but when i try to generate the PWM i just say a lot of noise. I use one library i wrote for another microcontroller and i'm sure work. I share my configuration and i hope someone can help me .
and the code
uint8_t led[led_number][3];
HAL_TIM_PWM_Init(&htim1);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
for(uint8_t cont=0; cont<255;cont++){
for(uint8_t nLed=0; nLed<led_number;nLed++){
led[nLed][0]=cont;
led[nLed][1]=0;
led[nLed][2]=0;
}
ws2812sendData(led);
HAL_Delay(30);
}
for(uint8_t cont=255; cont>0;cont--){
for(uint8_t nLed=0; nLed<led_number;nLed++){
led[nLed][0]=cont;
led[nLed][1]=0;
led[nLed][2]=0;
}
ws2812sendData(led);
HAL_Delay(30);
}
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}WS2812B.C
#include "WS2812.h"
#include "stm32g0xx_hal.h"
#include <stdio.h>
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
extern TIM_HandleTypeDef htim1;
extern DMA_HandleTypeDef hdma_tim1_ch4;
#define time &htim1
uint8_t indx=0;
uint8_t ws2812_hi;
uint8_t ws2812_lo;
uint8_t datasentflag=0;
uint16_t pwmData[(24*led_number)+50];
uint32_t time_period;
uint8_t i=0;
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
void HAL_TIM_PWM_PulseFinishedCallback(TIM_HandleTypeDef *htim)
{
HAL_TIM_PWM_Stop_DMA(&htim1, TIM_CHANNEL_4);
datasentflag=1;
}
/**
* @brief
* @param None
* @retval None
*/
void ws2812_init(void){
uint32_t frequency;
frequency = HAL_RCC_GetSysClockFreq();
time_period = (frequency / ws2812_fequ)-1 ;
ws2812_lo = time_period / 3;
ws2812_hi = (time_period * 2)/3;
}
/**
* @brief
* @param None
* @retval None
*/
void ws2812_fill_black(void){
indx=0;;
for(indx = 0 ; indx < led_data_size ; indx ++){
pwmData[indx]= ws2812_lo;
indx++;
}
ws2812_reset();
ws2812Send();
}
/**
* @brief
* @param None
* @retval None
*/
void ws2812sendData(uint8_t led[led_number][3]){
indx=0;
uint32_t color;
for(i=0; i < led_number ;i++){
color = ((led[i][1]<<16) | (led[i][0]<<8) | (led[i][2]));
for(int8_t u=23; u>=0; u--){
if (color&(1<<u))
{
pwmData[indx] = ws2812_hi;
}
else{
pwmData[indx] = ws2812_lo;
}
indx++;
}
}
for (uint8_t y=0; y<50; y++){
pwmData[indx] = ws2812_rst;
indx++;
}
ws2812Send();
}
/**
* @brief
* @param None
* @retval None
*/
void ws2812_reset(void){
for(indx = 0 ; indx < reset ; indx ++){
pwmData[indx]= ws2812_rst;
indx++;
}
HAL_TIM_PWM_Start_DMA(&htim1, TIM_CHANNEL_4, (uint32_t *)pwmData, 50);
while (!datasentflag){};
datasentflag = 0;
}
/**
* @brief
* @param None
* @retval None
*/
void ws2812Send(void){
HAL_TIM_PWM_Start_DMA(&htim1, TIM_CHANNEL_4, (uint32_t *)pwmData, indx);
while (!datasentflag){};
datasentflag = 0;
}Thanks a lot
Sergio
