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optimize pwm interrupt handler for better precision

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This commit is contained in:
Me No Dev 2015-12-21 13:50:29 +02:00
parent 5edcaa0eed
commit 1ae423021a
1 changed files with 8 additions and 7 deletions
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15
cores/esp8266/core_esp8266_wiring_pwm.c
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@ -94,18 +94,19 @@ void ICACHE_RAM_ATTR pwm_timer_isr(){
static uint16_t steps[17];
static uint32_t masks[17];
if(current_step < stepcount){
GPOC = masks[current_step] & 0xFFFF;
if(masks[current_step] & 0x10000) GP16O &= ~1;
T1L = (pwm_steps[current_step+1] * pwm_multiplier);
TEIE |= TEIE1;
if(masks[current_step] & 0xFFFF) GPOC = masks[current_step] & 0xFFFF;
if(masks[current_step] & 0x10000) GP16O = 0;
current_step++;
timer1_write(pwm_steps[current_step] * pwm_multiplier);
} else {
current_step = 0;
stepcount = 0;
if(pwm_mask == 0) return;
GPOS = pwm_mask & 0xFFFF;
if(pwm_mask & 0x10000) GP16O |= 1;
timer1_write(pwm_steps[0] * pwm_multiplier);
T1L = (pwm_steps[current_step+1] * pwm_multiplier);
TEIE |= TEIE1;
if(pwm_mask & 0xFFFF) GPOS = pwm_mask & 0xFFFF;
if(pwm_mask & 0x10000) GP16O = 1;
stepcount = pwm_steps_len;
memcpy(steps, pwm_steps, (stepcount + 1) * 2);
memcpy(masks, pwm_steps_mask, stepcount * 4);