148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
|
|
*
|
|
* 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 <stdbool.h>
|
|
#include <stdint.h>
|
|
|
|
#include "timers.h"
|
|
|
|
#include "common-hal/pulseio/PulseOut.h"
|
|
|
|
const uint16_t prescaler[8] = {1, 2, 4, 8, 16, 64, 256, 1024};
|
|
|
|
Tc* const tc_insts[TC_INST_NUM] = TC_INSTS;
|
|
Tcc* const tcc_insts[TCC_INST_NUM] = TCC_INSTS;
|
|
|
|
IRQn_Type const tc_irq[TC_INST_NUM] = {
|
|
#ifdef TC0
|
|
TC0_IRQn,
|
|
#endif
|
|
#ifdef TC1
|
|
TC1_IRQn,
|
|
#endif
|
|
#ifdef TC2
|
|
TC2_IRQn,
|
|
#endif
|
|
#ifdef TC3
|
|
TC3_IRQn,
|
|
#endif
|
|
#ifdef TC4
|
|
TC4_IRQn,
|
|
#endif
|
|
#ifdef TC5
|
|
TC5_IRQn,
|
|
#endif
|
|
#ifdef TC6
|
|
TC6_IRQn,
|
|
#endif
|
|
#ifdef TC7
|
|
TC7_IRQn,
|
|
#endif
|
|
};
|
|
|
|
void tc_enable_interrupts(uint8_t tc_index) {
|
|
NVIC_DisableIRQ(tc_irq[tc_index]);
|
|
NVIC_ClearPendingIRQ(tc_irq[tc_index]);
|
|
NVIC_EnableIRQ(tc_irq[tc_index]);
|
|
}
|
|
|
|
void tc_disable_interrupts(uint8_t tc_index) {
|
|
NVIC_DisableIRQ(tc_irq[tc_index]);
|
|
NVIC_ClearPendingIRQ(tc_irq[tc_index]);
|
|
}
|
|
|
|
void tcc_set_enable(Tcc* tcc, bool enable) {
|
|
tcc->CTRLA.bit.ENABLE = enable;
|
|
while (tcc->SYNCBUSY.bit.ENABLE != 0) {
|
|
/* Wait for sync */
|
|
}
|
|
}
|
|
|
|
void tc_reset(Tc* tc) {
|
|
tc->COUNT16.CTRLA.bit.SWRST = 1;
|
|
while (tc->COUNT16.CTRLA.bit.SWRST == 1) {
|
|
}
|
|
}
|
|
|
|
void shared_timer_handler(bool is_tc, uint8_t index) {
|
|
// Add calls to interrupt handlers for specific functionality here.
|
|
if (is_tc) {
|
|
pulseout_interrupt_handler(index);
|
|
}
|
|
}
|
|
|
|
#ifdef SAMD51
|
|
#define TC_OFFSET 0
|
|
#endif
|
|
#ifdef SAMD21
|
|
#define TC_OFFSET 3
|
|
#endif
|
|
|
|
void TCC0_Handler(void) {
|
|
shared_timer_handler(false, 0);
|
|
}
|
|
void TCC1_Handler(void) {
|
|
shared_timer_handler(false, 1);
|
|
}
|
|
void TCC2_Handler(void) {
|
|
shared_timer_handler(false, 2);
|
|
}
|
|
// TC0 - TC2 only exist on the SAMD51
|
|
#ifdef TC0
|
|
void TC0_Handler(void) {
|
|
shared_timer_handler(true, 0);
|
|
}
|
|
#endif
|
|
#ifdef TC1
|
|
void TC1_Handler(void) {
|
|
shared_timer_handler(true, 1);
|
|
}
|
|
#endif
|
|
#ifdef TC2
|
|
void TC2_Handler(void) {
|
|
shared_timer_handler(true, 2);
|
|
}
|
|
#endif
|
|
void TC3_Handler(void) {
|
|
shared_timer_handler(true, 3 - TC_OFFSET);
|
|
}
|
|
void TC4_Handler(void) {
|
|
shared_timer_handler(true, 4 - TC_OFFSET);
|
|
}
|
|
void TC5_Handler(void) {
|
|
shared_timer_handler(true, 5 - TC_OFFSET);
|
|
}
|
|
#ifdef TC6
|
|
void TC6_Handler(void) {
|
|
shared_timer_handler(true, 6 - TC_OFFSET);
|
|
}
|
|
#endif
|
|
#ifdef TC7
|
|
void TC7_Handler(void) {
|
|
shared_timer_handler(true, 7 - TC_OFFSET);
|
|
}
|
|
#endif
|