You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.2 KiB
83 lines
2.2 KiB
#include "platform.h"
|
|
#include "ws2812.h"
|
|
|
|
#define FREQ_STEP (PLAT_AHB_MHZ/20.0f)
|
|
#define NPX_DELAY_SHORT (uint32_t)(FREQ_STEP*1.5f)
|
|
#define NPX_DELAY_LONG (uint32_t)(FREQ_STEP*3.5f)
|
|
#define NPX_DELAY_SHOW (uint32_t)(FREQ_STEP*50)
|
|
|
|
static inline __attribute__((always_inline))
|
|
void ws2812_byte(GPIO_TypeDef *port, uint32_t ll_pin, uint8_t b)
|
|
{
|
|
for (register volatile uint8_t i = 0; i < 8; i++) {
|
|
LL_GPIO_SetOutputPin(port, ll_pin);
|
|
|
|
// duty cycle determines bit value
|
|
if (b & 0x80) {
|
|
__asm_loop(NPX_DELAY_LONG);
|
|
LL_GPIO_ResetOutputPin(port, ll_pin);
|
|
__asm_loop(NPX_DELAY_SHORT);
|
|
} else {
|
|
__asm_loop(NPX_DELAY_SHORT);
|
|
LL_GPIO_ResetOutputPin(port, ll_pin);
|
|
__asm_loop(NPX_DELAY_LONG);
|
|
}
|
|
|
|
b <<= 1; // shift to next bit
|
|
}
|
|
}
|
|
|
|
/** Set many RGBs from packed stream */
|
|
void ws2812_load_raw(GPIO_TypeDef *port, uint32_t ll_pin, const uint8_t *rgbs, uint32_t count)
|
|
{
|
|
vPortEnterCritical();
|
|
uint8_t b, g, r;
|
|
for (uint32_t i = 0; i < count; i++) {
|
|
r = *rgbs++;
|
|
g = *rgbs++;
|
|
b = *rgbs++;
|
|
ws2812_byte(port, ll_pin, g);
|
|
ws2812_byte(port, ll_pin, r);
|
|
ws2812_byte(port, ll_pin, b);
|
|
}
|
|
vPortExitCritical();
|
|
__asm_loop(NPX_DELAY_SHOW);
|
|
}
|
|
|
|
/** Set many RGBs from uint32 stream */
|
|
void ws2812_load_sparse(GPIO_TypeDef *port, uint32_t ll_pin, const uint8_t *rgbs, uint32_t count,
|
|
bool order_bgr, bool zero_before)
|
|
{
|
|
vPortEnterCritical();
|
|
uint8_t b, g, r;
|
|
for (uint32_t i = 0; i < count; i++) {
|
|
if (zero_before) rgbs++; // skip
|
|
if (order_bgr) {
|
|
b = *rgbs++;
|
|
g = *rgbs++;
|
|
r = *rgbs++;
|
|
} else {
|
|
r = *rgbs++;
|
|
g = *rgbs++;
|
|
b = *rgbs++;
|
|
}
|
|
if (!zero_before) rgbs++; // skip
|
|
|
|
ws2812_byte(port, ll_pin, g);
|
|
ws2812_byte(port, ll_pin, r);
|
|
ws2812_byte(port, ll_pin, b);
|
|
}
|
|
vPortExitCritical();
|
|
__asm_loop(NPX_DELAY_SHOW);
|
|
}
|
|
|
|
/** Set many RGBs */
|
|
void ws2812_clear(GPIO_TypeDef *port, uint32_t ll_pin, uint32_t count)
|
|
{
|
|
vPortEnterCritical();
|
|
for (uint32_t i = 0; i < count*3; i++) {
|
|
ws2812_byte(port, ll_pin, 0);
|
|
}
|
|
vPortExitCritical();
|
|
__asm_loop(NPX_DELAY_SHOW);
|
|
}
|
|
|