stm32f103ze+WS2812b可調控RGB燈源程序，使用spI+dma進行調光

ID:125878 · 發表于 2019-7-10 10:50

基于stm32f103ze+WS2812b可調控RGB燈，使用spI+dma進行調光，調光編碼可自己百度尋找修改本程序

單片機源程序如下:

#include "ws2812.h"
/*WS2812B Timing sequence
________
| | T0L |
0 code |<------>|<-------------->|
| T0H |________________|
___________
| | T1L |
1 code |<--------->|<--------- -->|
| T1H |______________|
RET code
| Treset |
|<------------------------->|
|___________________________|
Data transefer time:
T0H 0 code ,high voltage time 0.4us ±150ns
T1H 1 code ,high voltage time 0.8us ±150ns
T0L 0 code , low voltage time 0.85us ±150ns
T1L 1 code ,low voltage time 0.45us ±150ns
RES low voltage time Above 50us
*/
int8_t WS2812_Init(void)
{
return 0;
}
static int8_t WS2812_BitCode_Packet(uint8_t bit_val,uint8_t *spi_packet_buf)
{
if(bit_val == 0){
spi_packet_buf[0] = 0xFF;
spi_packet_buf[1] = 0x00;
spi_packet_buf[2] = 0x00;
return 0;
}
else if(bit_val == 1){
spi_packet_buf[0] = 0xFF;
spi_packet_buf[1] = 0xFF;
spi_packet_buf[2] = 0x00;
return 0;
}
else
return -1;
}
static int8_t WS2812_OnePixel_Packet(T_RGB_CTRL sRGBVal,uint8_t *packet_buf)
{
uint8_t bit_cnt;
uint8_t color_cnt;
uint8_t bit_pos;
uint8_t singlecolor_val;
for(color_cnt = 0; color_cnt < 3; color_cnt++){
if(color_cnt == 0)
singlecolor_val = sRGBVal.G_Val;
else if(color_cnt == 1)
singlecolor_val = sRGBVal.R_Val;
else if(color_cnt == 2)
singlecolor_val = sRGBVal.B_Val;
for(bit_cnt = 0; bit_cnt < 8; bit_cnt++){
bit_pos = (7 - bit_cnt);
if(singlecolor_val & (1 << bit_pos) )
WS2812_BitCode_Packet(1,packet_buf);
else
WS2812_BitCode_Packet(0,packet_buf);
packet_buf += SPI_BYTE_LEN_PER_PIXEL;
}
}
return 0;
}
uint32_t WS2812_Pixels_Packet(uint32_t pixel_num,uint32_t *rgb_buf,uint8_t* spi_packet_buf)
{
uint32_t pixel_index;
T_RGB_CTRL rgb_ctrl_val;
uint32_t spi_packet_buf_index = 0;
for(pixel_index = 0; pixel_index < pixel_num; pixel_index++){
rgb_ctrl_val.R_Val = (uint8_t)(rgb_buf[pixel_index] >> 16);
rgb_ctrl_val.G_Val = (uint8_t)(rgb_buf[pixel_index] >> 8);
rgb_ctrl_val.B_Val = (uint8_t)(rgb_buf[pixel_index] >> 0);
WS2812_OnePixel_Packet(rgb_ctrl_val,spi_packet_buf + spi_packet_buf_index);
spi_packet_buf_index += SPI_BYTE_LEN_PER_PIXEL * 24;
}
return spi_packet_buf_index;
}