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fix ws2812

This commit is contained in:
Marc Poulhiès 2016-05-20 23:02:59 +02:00
parent 632545e338
commit ebd3650197
2 changed files with 18 additions and 10 deletions
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24
ws2812.c
View File

@ -35,13 +35,19 @@ int ws2812_write(ws2812_t *dev, char *b, unsigned len) {
return 0;
}
#define ZERO_BIT_PULSE 0x8 // 1000 (0000) ~250ns
#define ONE_BIT_PULSE 0xE // 1110 (0000) ~750ns
#define ZERO_BIT_PULSE 0x08 // 1000 (0000) ~250ns
#define ONE_BIT_PULSE 0x0E // 1110 (0000) ~750ns
#define W00 0x88
#define W01 0x8E
#define W10 0xE8
#define W11 0xEE
#define CONCAT(bit0, bit1) (bit0 | (bit1 << 4))
#define W00 CONCAT(ZERO_BIT_PULSE, ZERO_BIT_PULSE)
#define W01 CONCAT(ZERO_BIT_PULSE, ONE_BIT_PULSE)
#define W10 CONCAT(ONE_BIT_PULSE, ZERO_BIT_PULSE)
#define W11 CONCAT(ONE_BIT_PULSE, ONE_BIT_PULSE)
/* #define W00 0x88 // 1000 1000 */
/* #define W01 0x8E // 1000 1110 */
/* #define W10 0xE8 */
/* #define W11 0xEE */
void ws2812_fill_rgb(ws2812_rgb_t *leds, unsigned len, char* buffer){
int out_count = 0;
@ -58,16 +64,16 @@ void ws2812_fill_rgb(ws2812_rgb_t *leds, unsigned len, char* buffer){
buffer[out_count] = W00;
break;
case 0x1:
buffer[out_count] = W01;
buffer[out_count] = W10;
break;
case 0x2:
buffer[out_count] = W10;
buffer[out_count] = W01;
break;
case 0x3:
buffer[out_count] = W11;
break;
}
cur_byte<<2;
cur_byte<<=2;
/* buffer[out_count] = cur_byte & 0x80 ? ONE_BIT_PULSE : ZERO_BIT_PULSE; */
/* cur_byte <<=1; */

4
ws2812.h
View File

@ -7,7 +7,9 @@ typedef struct {
} ws2812_t;
typedef struct __attribute__((packed)) {
char g,r,b;
char b;
char r;
char g;
} ws2812_rgb_t;
#define BLUE {0x00, 0x00, 0xFF}