circuitpython/ports/mimxrt10xx/common-hal/pulseio/PulseOut.c

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2019-11-02 11:52:26 -04:00
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
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* SPDX-FileCopyrightText: Copyright (c) 2016 Damien P. George
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* Copyright (c) 2019 Artur Pacholec
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "common-hal/pulseio/PulseOut.h"
#include <stdint.h>
#include "mpconfigport.h"
#include "py/gc.h"
#include "py/runtime.h"
#include "shared-bindings/pulseio/PulseOut.h"
#include "supervisor/shared/translate.h"
// TODO
// This timer is shared amongst all PulseOut objects under the assumption that
// the code is single threaded.
//static uint8_t refcount = 0;
//
//static uint8_t pulseout_tc_index = 0xff;
//
//static __IO PORT_PINCFG_Type *active_pincfg = NULL;
//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;
//
//static void turn_on(__IO PORT_PINCFG_Type * pincfg) {
// pincfg->reg = PORT_PINCFG_PMUXEN;
//}
//
//static void turn_off(__IO PORT_PINCFG_Type * pincfg) {
// pincfg->reg = PORT_PINCFG_RESETVALUE;
//}
//
//void pulse_finish(void) {
// pulse_index++;
//
// if (active_pincfg == NULL) {
// return;
// }
// // Always turn it off.
// turn_off(active_pincfg);
// if (pulse_index >= pulse_length) {
// return;
// }
// current_compare = (current_compare + pulse_buffer[pulse_index] * 3 / 4) & 0xffff;
// Tc* tc = tc_insts[pulseout_tc_index];
// tc->COUNT16.CC[0].reg = current_compare;
// if (pulse_index % 2 == 0) {
// turn_on(active_pincfg);
// }
//}
void pulseout_interrupt_handler(uint8_t index) {
// if (index != pulseout_tc_index) return;
// Tc* tc = tc_insts[index];
// if (!tc->COUNT16.INTFLAG.bit.MC0) return;
//
// pulse_finish();
//
// // Clear the interrupt bit.
// tc->COUNT16.INTFLAG.reg = TC_INTFLAG_MC0;
}
void pulseout_reset() {
// refcount = 0;
// pulseout_tc_index = 0xff;
// active_pincfg = NULL;
}
void common_hal_pulseio_pulseout_construct(pulseio_pulseout_obj_t* self,
const pwmio_pwmout_obj_t* carrier) {
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// if (refcount == 0) {
// // Find a spare timer.
// Tc *tc = NULL;
// int8_t index = TC_INST_NUM - 1;
// for (; index >= 0; index--) {
// if (tc_insts[index]->COUNT16.CTRLA.bit.ENABLE == 0) {
// tc = tc_insts[index];
// break;
// }
// }
// if (tc == NULL) {
// mp_raise_RuntimeError(translate("All timers in use"));
// }
//
// pulseout_tc_index = index;
//
// set_timer_handler(true, index, TC_HANDLER_PULSEOUT);
// // We use GCLK0 for SAMD21 and GCLK1 for SAMD51 because they both run at 48mhz making our
// // math the same across the boards.
// #ifdef SAMD21
// turn_on_clocks(true, index, 0);
// #endif
// #ifdef SAMD51
// turn_on_clocks(true, index, 1);
// #endif
//
//
// #ifdef SAMD21
// tc->COUNT16.CTRLA.reg = TC_CTRLA_MODE_COUNT16 |
// TC_CTRLA_PRESCALER_DIV64 |
// TC_CTRLA_WAVEGEN_NFRQ;
// #endif
// #ifdef SAMD51
// tc_reset(tc);
// tc_set_enable(tc, false);
// tc->COUNT16.CTRLA.reg = TC_CTRLA_MODE_COUNT16 | TC_CTRLA_PRESCALER_DIV64;
// tc->COUNT16.WAVE.reg = TC_WAVE_WAVEGEN_NFRQ;
// #endif
//
// tc_set_enable(tc, true);
// tc->COUNT16.CTRLBSET.reg = TC_CTRLBSET_CMD_STOP;
// }
// refcount++;
//
// self->pin = carrier->pin->number;
//
// PortGroup *const port_base = &PORT->Group[GPIO_PORT(self->pin)];
// self->pincfg = &port_base->PINCFG[self->pin % 32];
//
// // Set the port to output a zero.
// port_base->OUTCLR.reg = 1 << (self->pin % 32);
// port_base->DIRSET.reg = 1 << (self->pin % 32);
//
// // Turn off the pinmux which should connect the port output.
// turn_off(self->pincfg);
}
bool common_hal_pulseio_pulseout_deinited(pulseio_pulseout_obj_t* self) {
// return self->pin == NO_PIN;
return false;
}
void common_hal_pulseio_pulseout_deinit(pulseio_pulseout_obj_t* self) {
// if (common_hal_pulseio_pulseout_deinited(self)) {
// return;
// }
// PortGroup *const port_base = &PORT->Group[GPIO_PORT(self->pin)];
// port_base->DIRCLR.reg = 1 << (self->pin % 32);
//
// turn_on(self->pincfg);
//
// refcount--;
// if (refcount == 0) {
// tc_reset(tc_insts[pulseout_tc_index]);
// pulseout_tc_index = 0xff;
// }
// self->pin = NO_PIN;
}
void common_hal_pulseio_pulseout_send(pulseio_pulseout_obj_t* self, uint16_t* pulses, uint16_t length) {
// if (active_pincfg != NULL) {
// mp_raise_RuntimeError(translate("Another send is already active"));
// }
// active_pincfg = self->pincfg;
// pulse_buffer = pulses;
// pulse_index = 0;
// pulse_length = length;
//
// current_compare = pulses[0] * 3 / 4;
// Tc* tc = tc_insts[pulseout_tc_index];
// tc->COUNT16.CC[0].reg = current_compare;
//
// // Clear our interrupt in case it was set earlier
// tc->COUNT16.INTFLAG.reg = TC_INTFLAG_MC0;
// tc->COUNT16.INTENSET.reg = TC_INTENSET_MC0;
// tc_enable_interrupts(pulseout_tc_index);
// turn_on(active_pincfg);
// tc->COUNT16.CTRLBSET.reg = TC_CTRLBSET_CMD_RETRIGGER;
//
// while(pulse_index < length) {
// // Do other things while we wait. The interrupts will handle sending the
// // signal.
// RUN_BACKGROUND_TASKS;
// }
//
// tc->COUNT16.CTRLBSET.reg = TC_CTRLBSET_CMD_STOP;
// tc->COUNT16.INTENCLR.reg = TC_INTENCLR_MC0;
// tc_disable_interrupts(pulseout_tc_index);
// active_pincfg = NULL;
}