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tinygo/src/machine/machine_esp32s3_pwm.go
T
Dima 47282be619 esp3s3 & esp32c3 PWM implements (#5215) 
* esp3s3 pwm

* esp32s3-pwm: added spi alias for esp32s3 for tests

* esp32s3-pwm: fix linters

* esp32s3-pwm: fix rename

* esp32s3-pwm: replace if to switch

* esp32s3-pwm: chip specific registry

* esp32s3-pwm: fix linters
2026-04-05 14:15:40 +02:00

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//go:build esp32s3
package machine
import "device/esp"
// LEDC PWM for ESP32-S3: 4 timers (PWM0–PWM3), 8 channels per timer; each timer has its own frequency.
// Range: frequency from a few Hz up to ~40 MHz (at 1-bit resolution); duty resolution 1–15 bits
// (higher frequency gives lower resolution). Clock source: APB 80 MHz. Low-speed mode only.
// Duty must not equal 2^resolution (overflow risk). See ESP-IDF LEDC driver, TRM LED PWM Controller.
// GPIO matrix output signal indices for LEDC (soc/gpio_sig_map.h)
const (
LEDC_LS_SIG_OUT0_IDX = 73
)
const ledcChannelsS3 = 8
var (
PWM0 = &LEDCPWM{SigOutBase: LEDC_LS_SIG_OUT0_IDX, NumChannels: ledcChannelsS3, timerNum: 0}
PWM1 = &LEDCPWM{SigOutBase: LEDC_LS_SIG_OUT0_IDX, NumChannels: ledcChannelsS3, timerNum: 1}
PWM2 = &LEDCPWM{SigOutBase: LEDC_LS_SIG_OUT0_IDX, NumChannels: ledcChannelsS3, timerNum: 2}
PWM3 = &LEDCPWM{SigOutBase: LEDC_LS_SIG_OUT0_IDX, NumChannels: ledcChannelsS3, timerNum: 3}
)
// chanOp implements LEDC low-speed channel ops for ESP32-S3 (channels 0–7).
func (pwm *LEDCPWM) chanOp(ch uint8, op ledcChanOp, duty uint32, inverting bool) {
invVal := uint32(0)
if inverting {
invVal = 1
}
switch ch {
case 0:
switch op {
case ledcChanOpInit:
esp.LEDC.SetCH0_CONF0_TIMER_SEL(uint32(pwm.timerNum))
esp.LEDC.SetCH0_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH0_CONF0_IDLE_LV(0)
esp.LEDC.SetCH0_HPOINT_HPOINT(0)
esp.LEDC.SetCH0_DUTY_DUTY(0)
esp.LEDC.SetCH0_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH0_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH0_CONF1_DUTY_INC(1)
esp.LEDC.SetCH0_CONF1_DUTY_START(1)
esp.LEDC.SetCH0_CONF0_PARA_UP(1)
case ledcChanOpSetDuty:
esp.LEDC.SetCH0_DUTY_DUTY(duty)
esp.LEDC.SetCH0_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH0_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH0_CONF1_DUTY_INC(1)
esp.LEDC.SetCH0_CONF1_DUTY_START(1)
esp.LEDC.SetCH0_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH0_CONF0_PARA_UP(1)
case ledcChanOpSetInvert:
esp.LEDC.SetCH0_CONF0_IDLE_LV(invVal)
}
case 1:
switch op {
case ledcChanOpInit:
esp.LEDC.SetCH1_CONF0_TIMER_SEL(uint32(pwm.timerNum))
esp.LEDC.SetCH1_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH1_CONF0_IDLE_LV(0)
esp.LEDC.SetCH1_HPOINT_HPOINT(0)
esp.LEDC.SetCH1_DUTY_DUTY(0)
esp.LEDC.SetCH1_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH1_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH1_CONF1_DUTY_INC(1)
esp.LEDC.SetCH1_CONF1_DUTY_START(1)
esp.LEDC.SetCH1_CONF0_PARA_UP(1)
case ledcChanOpSetDuty:
esp.LEDC.SetCH1_DUTY_DUTY(duty)
esp.LEDC.SetCH1_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH1_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH1_CONF1_DUTY_INC(1)
esp.LEDC.SetCH1_CONF1_DUTY_START(1)
esp.LEDC.SetCH1_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH1_CONF0_PARA_UP(1)
case ledcChanOpSetInvert:
esp.LEDC.SetCH1_CONF0_IDLE_LV(invVal)
}
case 2:
switch op {
case ledcChanOpInit:
esp.LEDC.SetCH2_CONF0_TIMER_SEL(uint32(pwm.timerNum))
esp.LEDC.SetCH2_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH2_CONF0_IDLE_LV(0)
esp.LEDC.SetCH2_HPOINT_HPOINT(0)
esp.LEDC.SetCH2_DUTY_DUTY(0)
esp.LEDC.SetCH2_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH2_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH2_CONF1_DUTY_INC(1)
esp.LEDC.SetCH2_CONF1_DUTY_START(1)
esp.LEDC.SetCH2_CONF0_PARA_UP(1)
case ledcChanOpSetDuty:
esp.LEDC.SetCH2_DUTY_DUTY(duty)
esp.LEDC.SetCH2_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH2_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH2_CONF1_DUTY_INC(1)
esp.LEDC.SetCH2_CONF1_DUTY_START(1)
esp.LEDC.SetCH2_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH2_CONF0_PARA_UP(1)
case ledcChanOpSetInvert:
esp.LEDC.SetCH2_CONF0_IDLE_LV(invVal)
}
case 3:
switch op {
case ledcChanOpInit:
esp.LEDC.SetCH3_CONF0_TIMER_SEL(uint32(pwm.timerNum))
esp.LEDC.SetCH3_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH3_CONF0_IDLE_LV(0)
esp.LEDC.SetCH3_HPOINT_HPOINT(0)
esp.LEDC.SetCH3_DUTY_DUTY(0)
esp.LEDC.SetCH3_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH3_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH3_CONF1_DUTY_INC(1)
esp.LEDC.SetCH3_CONF1_DUTY_START(1)
esp.LEDC.SetCH3_CONF0_PARA_UP(1)
case ledcChanOpSetDuty:
esp.LEDC.SetCH3_DUTY_DUTY(duty)
esp.LEDC.SetCH3_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH3_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH3_CONF1_DUTY_INC(1)
esp.LEDC.SetCH3_CONF1_DUTY_START(1)
esp.LEDC.SetCH3_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH3_CONF0_PARA_UP(1)
case ledcChanOpSetInvert:
esp.LEDC.SetCH3_CONF0_IDLE_LV(invVal)
}
case 4:
switch op {
case ledcChanOpInit:
esp.LEDC.SetCH4_CONF0_TIMER_SEL(uint32(pwm.timerNum))
esp.LEDC.SetCH4_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH4_CONF0_IDLE_LV(0)
esp.LEDC.SetCH4_HPOINT_HPOINT(0)
esp.LEDC.SetCH4_DUTY_DUTY(0)
esp.LEDC.SetCH4_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH4_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH4_CONF1_DUTY_INC(1)
esp.LEDC.SetCH4_CONF1_DUTY_START(1)
esp.LEDC.SetCH4_CONF0_PARA_UP(1)
case ledcChanOpSetDuty:
esp.LEDC.SetCH4_DUTY_DUTY(duty)
esp.LEDC.SetCH4_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH4_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH4_CONF1_DUTY_INC(1)
esp.LEDC.SetCH4_CONF1_DUTY_START(1)
esp.LEDC.SetCH4_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH4_CONF0_PARA_UP(1)
case ledcChanOpSetInvert:
esp.LEDC.SetCH4_CONF0_IDLE_LV(invVal)
}
case 5:
switch op {
case ledcChanOpInit:
esp.LEDC.SetCH5_CONF0_TIMER_SEL(uint32(pwm.timerNum))
esp.LEDC.SetCH5_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH5_CONF0_IDLE_LV(0)
esp.LEDC.SetCH5_HPOINT_HPOINT(0)
esp.LEDC.SetCH5_DUTY_DUTY(0)
esp.LEDC.SetCH5_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH5_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH5_CONF1_DUTY_INC(1)
esp.LEDC.SetCH5_CONF1_DUTY_START(1)
esp.LEDC.SetCH5_CONF0_PARA_UP(1)
case ledcChanOpSetDuty:
esp.LEDC.SetCH5_DUTY_DUTY(duty)
esp.LEDC.SetCH5_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH5_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH5_CONF1_DUTY_INC(1)
esp.LEDC.SetCH5_CONF1_DUTY_START(1)
esp.LEDC.SetCH5_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH5_CONF0_PARA_UP(1)
case ledcChanOpSetInvert:
esp.LEDC.SetCH5_CONF0_IDLE_LV(invVal)
}
case 6:
switch op {
case ledcChanOpInit:
esp.LEDC.SetCH6_CONF0_TIMER_SEL(uint32(pwm.timerNum))
esp.LEDC.SetCH6_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH6_CONF0_IDLE_LV(0)
esp.LEDC.SetCH6_HPOINT_HPOINT(0)
esp.LEDC.SetCH6_DUTY_DUTY(0)
esp.LEDC.SetCH6_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH6_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH6_CONF1_DUTY_INC(1)
esp.LEDC.SetCH6_CONF1_DUTY_START(1)
esp.LEDC.SetCH6_CONF0_PARA_UP(1)
case ledcChanOpSetDuty:
esp.LEDC.SetCH6_DUTY_DUTY(duty)
esp.LEDC.SetCH6_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH6_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH6_CONF1_DUTY_INC(1)
esp.LEDC.SetCH6_CONF1_DUTY_START(1)
esp.LEDC.SetCH6_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH6_CONF0_PARA_UP(1)
case ledcChanOpSetInvert:
esp.LEDC.SetCH6_CONF0_IDLE_LV(invVal)
}
case 7:
switch op {
case ledcChanOpInit:
esp.LEDC.SetCH7_CONF0_TIMER_SEL(uint32(pwm.timerNum))
esp.LEDC.SetCH7_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH7_CONF0_IDLE_LV(0)
esp.LEDC.SetCH7_HPOINT_HPOINT(0)
esp.LEDC.SetCH7_DUTY_DUTY(0)
esp.LEDC.SetCH7_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH7_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH7_CONF1_DUTY_INC(1)
esp.LEDC.SetCH7_CONF1_DUTY_START(1)
esp.LEDC.SetCH7_CONF0_PARA_UP(1)
case ledcChanOpSetDuty:
esp.LEDC.SetCH7_DUTY_DUTY(duty)
esp.LEDC.SetCH7_CONF1_DUTY_CYCLE(1)
esp.LEDC.SetCH7_CONF1_DUTY_NUM(1)
esp.LEDC.SetCH7_CONF1_DUTY_INC(1)
esp.LEDC.SetCH7_CONF1_DUTY_START(1)
esp.LEDC.SetCH7_CONF0_SIG_OUT_EN(1)
esp.LEDC.SetCH7_CONF0_PARA_UP(1)
case ledcChanOpSetInvert:
esp.LEDC.SetCH7_CONF0_IDLE_LV(invVal)
}
}
}
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