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Implement pulseout for RP2040

This commit is contained in:
root 2021-05-17 16:24:45 -05:00
parent 0ac107b733
commit 11ef36d09d
3 changed files with 34 additions and 18 deletions
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2
ports/raspberrypi/Makefile
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@ -106,7 +106,7 @@ INC += -I. \
-I$(BUILD)
# Pico specific configuration
CFLAGS += -DRASPBERRYPI -DPICO_ON_DEVICE=1 -DPICO_NO_BINARY_INFO=0 -DPICO_TIME_DEFAULT_ALARM_POOL_DISABLED=1 -DPICO_DIVIDER_CALL_IDIV0=0 -DPICO_DIVIDER_CALL_LDIV0=0 -DPICO_DIVIDER_HARDWARE=1 -DPICO_DOUBLE_ROM=1 -DPICO_FLOAT_ROM=1 -DPICO_MULTICORE=1 -DPICO_BITS_IN_RAM=0 -DPICO_DIVIDER_IN_RAM=0 -DPICO_DOUBLE_PROPAGATE_NANS=0 -DPICO_DOUBLE_IN_RAM=0 -DPICO_MEM_IN_RAM=0 -DPICO_FLOAT_IN_RAM=0 -DPICO_FLOAT_PROPAGATE_NANS=1 -DPICO_NO_FLASH=0 -DPICO_COPY_TO_RAM=0 -DPICO_DISABLE_SHARED_IRQ_HANDLERS=0 -DPICO_NO_BI_BOOTSEL_VIA_DOUBLE_RESET=0
CFLAGS += -DRASPBERRYPI -DPICO_ON_DEVICE=1 -DPICO_NO_BINARY_INFO=0 -DPICO_TIME_DEFAULT_ALARM_POOL_DISABLED=0 -DPICO_DIVIDER_CALL_IDIV0=0 -DPICO_DIVIDER_CALL_LDIV0=0 -DPICO_DIVIDER_HARDWARE=1 -DPICO_DOUBLE_ROM=1 -DPICO_FLOAT_ROM=1 -DPICO_MULTICORE=1 -DPICO_BITS_IN_RAM=0 -DPICO_DIVIDER_IN_RAM=0 -DPICO_DOUBLE_PROPAGATE_NANS=0 -DPICO_DOUBLE_IN_RAM=0 -DPICO_MEM_IN_RAM=0 -DPICO_FLOAT_IN_RAM=0 -DPICO_FLOAT_PROPAGATE_NANS=1 -DPICO_NO_FLASH=0 -DPICO_COPY_TO_RAM=0 -DPICO_DISABLE_SHARED_IRQ_HANDLERS=0 -DPICO_NO_BI_BOOTSEL_VIA_DOUBLE_RESET=0
OPTIMIZATION_FLAGS ?= -O3
# TinyUSB defines
CFLAGS += -DTUD_OPT_RP2040_USB_DEVICE_ENUMERATION_FIX=1 -DCFG_TUSB_MCU=OPT_MCU_RP2040 -DCFG_TUD_MIDI_RX_BUFSIZE=128 -DCFG_TUD_CDC_RX_BUFSIZE=256 -DCFG_TUD_MIDI_TX_BUFSIZE=128 -DCFG_TUD_CDC_TX_BUFSIZE=256 -DCFG_TUD_MSC_BUFSIZE=1024

46
ports/raspberrypi/common-hal/pulseio/PulseOut.c
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@ -27,31 +27,38 @@
#include "common-hal/pulseio/PulseOut.h"
#include <stdint.h>
#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
#include "mpconfigport.h"
#include "py/gc.h"
#include "py/runtime.h"
#include "shared-bindings/pulseio/PulseOut.h"
#include "shared-bindings/pwmio/PWMOut.h"
#include "common-hal/pwmio/PWMOut.h"
#include "supervisor/shared/translate.h"
#include "src/rp2_common/hardware_pwm/include/hardware/pwm.h"
#include "src/common/pico_time/include/pico/time.h"
static uint8_t refcount = 0;
static uint16_t *pulse_buffer = NULL;
static volatile uint16_t pulse_index = 0;
static uint16_t pulse_length;
static volatile uint32_t current_compare = 0;
pwmio_pwmout_obj_t *pwmout_obj;
volatile uint16_t current_duty_cycle;
void pulse_finish(void) {
pulse_index++;
// Always turn it off.
// Turn pwm pin off by settting duty cyle to 1.
common_hal_pwmio_pwmout_set_duty_cycle(pwmout_obj,1);
if (pulse_index >= pulse_length) {
return;
}
current_compare = (current_compare + pulse_buffer[pulse_index] * 3 / 4) & 0xffff;
add_alarm_in_us( pulse_buffer[pulse_index], pulseout_interrupt_handler, NULL, false);
if (pulse_index % 2 == 0) {
common_hal_pwmio_pwmout_set_duty_cycle(pwmout_obj,current_duty_cycle);
}
}
int64_t pulseout_interrupt_handler(alarm_id_t id, void *user_data) {
pulse_finish();
return 0;
}
void pulseout_reset() {
@ -63,12 +70,13 @@ void common_hal_pulseio_pulseout_construct(pulseio_pulseout_obj_t *self,
const mcu_pin_obj_t *pin,
uint32_t frequency,
uint16_t duty_cycle) {
mp_raise_NotImplementedError(translate("Unsupported operation"));
refcount++;
pwmout_obj = (pwmio_pwmout_obj_t *)carrier;
current_duty_cycle = common_hal_pwmio_pwmout_get_duty_cycle(pwmout_obj);
self->pin = carrier->pin->number;
self->slice = carrier->slice;
pwm_set_enabled (pwmout_obj->slice,false);
}
bool common_hal_pulseio_pulseout_deinited(pulseio_pulseout_obj_t *self) {
@ -79,8 +87,6 @@ void common_hal_pulseio_pulseout_deinit(pulseio_pulseout_obj_t *self) {
if (common_hal_pulseio_pulseout_deinited(self)) {
return;
}
refcount--;
self->pin = NO_PIN;
}
@ -90,6 +96,14 @@ void common_hal_pulseio_pulseout_send(pulseio_pulseout_obj_t *self, uint16_t *pu
pulse_index = 0;
pulse_length = length;
current_compare = pulses[0] * 3 / 4;
add_alarm_in_us( pulses[0], pulseout_interrupt_handler, NULL, false);
common_hal_pwmio_pwmout_set_duty_cycle(pwmout_obj,current_duty_cycle);
pwm_set_enabled (pwmout_obj->slice,true);
while(pulse_index < length) {
// Do other things while we wait. The interrupts will handle sending the
// signal.
RUN_BACKGROUND_TASKS;
}
pwm_set_enabled (pwmout_obj->slice,false);
}

4
ports/raspberrypi/common-hal/pulseio/PulseOut.h
View File

@ -28,6 +28,7 @@
#define MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PULSEIO_PULSEOUT_H
#include "common-hal/microcontroller/Pin.h"
#include "src/common/pico_time/include/pico/time.h"
#include "py/obj.h"
@ -36,9 +37,10 @@
typedef struct {
mp_obj_base_t base;
uint8_t pin;
uint8_t slice;
} pulseio_pulseout_obj_t;
void pulseout_reset(void);
void pulseout_interrupt_handler(uint8_t index);
int64_t pulseout_interrupt_handler(alarm_id_t id, void *user_data);
#endif // MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PULSEIO_PULSEOUT_H