247 lines
8.4 KiB
C
247 lines
8.4 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017-2018 Scott Shawcroft for Adafruit Industries
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* Copyright (c) 2019 Artur Pacholec
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "common-hal/pulseio/PulseIn.h"
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#include <stdint.h>
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#include "background.h"
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#include "mpconfigport.h"
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#include "py/gc.h"
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#include "py/runtime.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "shared-bindings/pulseio/PulseIn.h"
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#include "supervisor/shared/translate.h"
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// TODO
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//static void pulsein_set_config(pulseio_pulsein_obj_t* self, bool first_edge) {
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// uint32_t sense_setting;
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// if (!first_edge) {
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// sense_setting = EIC_CONFIG_SENSE0_BOTH_Val;
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// configure_eic_channel(self->channel, sense_setting);
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// return;
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// } else if (self->idle_state) {
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// sense_setting = EIC_CONFIG_SENSE0_FALL_Val;
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// } else {
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// sense_setting = EIC_CONFIG_SENSE0_RISE_Val;
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// }
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// set_eic_handler(self->channel, EIC_HANDLER_PULSEIN);
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// turn_on_eic_channel(self->channel, sense_setting);
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//}
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//void pulsein_interrupt_handler(uint8_t channel) {
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// // Grab the current time first.
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// uint32_t current_us;
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// uint64_t current_ms;
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// current_tick(¤t_ms, ¤t_us);
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//
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// // current_tick gives us the remaining us until the next tick but we want the number since the
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// // last ms.
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// current_us = 1000 - current_us;
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// pulseio_pulsein_obj_t* self = get_eic_channel_data(channel);
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// if (!supervisor_background_tasks_ok() || self->errored_too_fast) {
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// self->errored_too_fast = true;
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// common_hal_pulseio_pulsein_pause(self);
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// return;
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// }
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// if (self->first_edge) {
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// self->first_edge = false;
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// pulsein_set_config(self, false);
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// } else {
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// uint32_t ms_diff = current_ms - self->last_ms;
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// uint16_t us_diff = current_us - self->last_us;
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// uint32_t total_diff = us_diff;
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// if (self->last_us > current_us) {
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// total_diff = 1000 + current_us - self->last_us;
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// if (ms_diff > 1) {
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// total_diff += (ms_diff - 1) * 1000;
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// }
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// } else {
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// total_diff += ms_diff * 1000;
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// }
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// uint16_t duration = 0xffff;
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// if (total_diff < duration) {
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// duration = total_diff;
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// }
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//
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// uint16_t i = (self->start + self->len) % self->maxlen;
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// self->buffer[i] = duration;
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// if (self->len < self->maxlen) {
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// self->len++;
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// } else {
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// self->start++;
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// }
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// }
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// self->last_ms = current_ms;
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// self->last_us = current_us;
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//}
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void common_hal_pulseio_pulsein_construct(pulseio_pulsein_obj_t* self,
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const mcu_pin_obj_t* pin, uint16_t maxlen, bool idle_state) {
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// if (!pin->has_extint) {
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// mp_raise_RuntimeError(translate("No hardware support on pin"));
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// }
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// if (eic_get_enable() && !eic_channel_free(pin->extint_channel)) {
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// mp_raise_RuntimeError(translate("EXTINT channel already in use"));
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// }
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//
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// self->buffer = (uint16_t *) m_malloc(maxlen * sizeof(uint16_t), false);
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// if (self->buffer == NULL) {
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// mp_raise_msg_varg(&mp_type_MemoryError, translate("Failed to allocate RX buffer of %d bytes"), maxlen * sizeof(uint16_t));
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// }
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// self->channel = pin->extint_channel;
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// self->pin = pin->number;
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// self->maxlen = maxlen;
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// self->idle_state = idle_state;
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// self->start = 0;
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// self->len = 0;
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// self->first_edge = true;
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// self->last_us = 0;
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// self->last_ms = 0;
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// self->errored_too_fast = false;
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//
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// set_eic_channel_data(pin->extint_channel, (void*) self);
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//
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// // Check to see if the EIC is enabled and start it up if its not.'
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// if (eic_get_enable() == 0) {
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// turn_on_external_interrupt_controller();
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// }
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//
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// gpio_set_pin_function(pin->number, GPIO_PIN_FUNCTION_A);
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//
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// turn_on_cpu_interrupt(self->channel);
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//
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// claim_pin(pin);
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//
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// // Set config will enable the EIC.
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// pulsein_set_config(self, true);
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}
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bool common_hal_pulseio_pulsein_deinited(pulseio_pulsein_obj_t* self) {
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// return self->pin == NO_PIN;
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return true;
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}
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void common_hal_pulseio_pulsein_deinit(pulseio_pulsein_obj_t* self) {
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// if (common_hal_pulseio_pulsein_deinited(self)) {
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// return;
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// }
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// set_eic_handler(self->channel, EIC_HANDLER_NO_INTERRUPT);
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// turn_off_eic_channel(self->channel);
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// reset_pin_number(self->pin);
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// self->pin = NO_PIN;
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}
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void common_hal_pulseio_pulsein_pause(pulseio_pulsein_obj_t* self) {
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// uint32_t mask = 1 << self->channel;
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// EIC->INTENCLR.reg = mask << EIC_INTENSET_EXTINT_Pos;
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}
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void common_hal_pulseio_pulsein_resume(pulseio_pulsein_obj_t* self,
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uint16_t trigger_duration) {
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// // Make sure we're paused.
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// common_hal_pulseio_pulsein_pause(self);
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//
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// // Reset erroring
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// self->errored_too_fast = false;
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//
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// // Send the trigger pulse.
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// if (trigger_duration > 0) {
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// gpio_set_pin_pull_mode(self->pin, GPIO_PULL_OFF);
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// gpio_set_pin_direction(self->pin, GPIO_DIRECTION_OUT);
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// gpio_set_pin_level(self->pin, !self->idle_state);
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// common_hal_mcu_delay_us((uint32_t)trigger_duration);
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// gpio_set_pin_level(self->pin, self->idle_state);
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// }
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//
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// // Reconfigure the pin and make sure its set to detect the first edge.
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// self->first_edge = true;
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// self->last_ms = 0;
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// self->last_us = 0;
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// gpio_set_pin_function(self->pin, GPIO_PIN_FUNCTION_A);
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// uint32_t mask = 1 << self->channel;
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// // Clear previous interrupt state and re-enable it.
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// EIC->INTFLAG.reg = mask << EIC_INTFLAG_EXTINT_Pos;
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// EIC->INTENSET.reg = mask << EIC_INTENSET_EXTINT_Pos;
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//
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// pulsein_set_config(self, true);
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}
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void common_hal_pulseio_pulsein_clear(pulseio_pulsein_obj_t* self) {
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// common_hal_mcu_disable_interrupts();
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// self->start = 0;
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// self->len = 0;
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// common_hal_mcu_enable_interrupts();
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}
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uint16_t common_hal_pulseio_pulsein_popleft(pulseio_pulsein_obj_t* self) {
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// if (self->len == 0) {
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// mp_raise_IndexError_varg(translate("pop from empty %q"), MP_QSTR_PulseIn);
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// }
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// common_hal_mcu_disable_interrupts();
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// uint16_t value = self->buffer[self->start];
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// self->start = (self->start + 1) % self->maxlen;
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// self->len--;
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// common_hal_mcu_enable_interrupts();
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//
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// return value;
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return 0;
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}
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uint16_t common_hal_pulseio_pulsein_get_maxlen(pulseio_pulsein_obj_t* self) {
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// return self->maxlen;
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return 0;
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}
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uint16_t common_hal_pulseio_pulsein_get_len(pulseio_pulsein_obj_t* self) {
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// return self->len;
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return 0;
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}
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bool common_hal_pulseio_pulsein_get_paused(pulseio_pulsein_obj_t* self) {
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// uint32_t mask = 1 << self->channel;
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// return (EIC->INTENSET.reg & (mask << EIC_INTENSET_EXTINT_Pos)) == 0;
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return true;
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}
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uint16_t common_hal_pulseio_pulsein_get_item(pulseio_pulsein_obj_t* self,
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int16_t index) {
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// common_hal_mcu_disable_interrupts();
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// if (index < 0) {
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// index += self->len;
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// }
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// if (index < 0 || index >= self->len) {
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// common_hal_mcu_enable_interrupts();
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// mp_raise_IndexError_varg(translate("%q index out of range"), MP_QSTR_PulseIn);
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// }
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// uint16_t value = self->buffer[(self->start + index) % self->maxlen];
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// common_hal_mcu_enable_interrupts();
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// return value;
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return 0;
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}
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