circuitpython/ports/samd/mphalport.h

144 lines
4.4 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019-2021 Damien P. George
* Copyright (c) 2022 Robert Hammelrath
*
* 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.
*/
#ifndef MICROPY_INCLUDED_SAMD_MPHALPORT_H
#define MICROPY_INCLUDED_SAMD_MPHALPORT_H
#include "py/mpconfig.h"
// ASF4
#include "hal_gpio.h"
#include "hpl_time_measure.h"
#include "sam.h"
extern int mp_interrupt_char;
extern volatile uint32_t systick_ms;
extern volatile uint32_t systick_ms_upper;
void mp_hal_set_interrupt_char(int c);
// Define an alias fo systick_ms, because the shared softtimer.c uses
// the symbol uwTick for the systick ms counter.
#define uwTick systick_ms
#define mp_hal_delay_us_fast mp_hal_delay_us
static inline mp_uint_t mp_hal_ticks_ms(void) {
return systick_ms;
}
static inline mp_uint_t mp_hal_ticks_us(void) {
#if defined(MCU_SAMD21)
return REG_TC4_COUNT32_COUNT;
#elif defined(MCU_SAMD51)
TC0->COUNT32.CTRLBSET.reg = TC_CTRLBSET_CMD_READSYNC;
while (TC0->COUNT32.CTRLBSET.reg != 0) {
}
return REG_TC0_COUNT32_COUNT >> 3;
#else
return systick_ms * 1000;
#endif
}
// ticks_cpu is limited to a 1 ms period, since the CPU SysTick counter
// is used for the 1 ms SysTick_Handler interrupt.
static inline mp_uint_t mp_hal_ticks_cpu(void) {
return (system_time_t)SysTick->VAL;
}
static inline uint64_t mp_hal_time_ns(void) {
return ((uint64_t)systick_ms + (uint64_t)systick_ms_upper * 0x100000000) * 1000000;
}
// C-level pin HAL
#include "py/obj.h"
#define MP_HAL_PIN_FMT "%u"
#define mp_hal_pin_obj_t uint
extern uint32_t machine_pin_open_drain_mask[];
mp_hal_pin_obj_t mp_hal_get_pin_obj(mp_obj_t pin_in);
void mp_hal_set_pin_mux(mp_hal_pin_obj_t pin, uint8_t mux);
void mp_hal_clr_pin_mux(mp_hal_pin_obj_t pin);
static inline unsigned int mp_hal_pin_name(mp_hal_pin_obj_t pin) {
return pin;
}
static inline void mp_hal_pin_input(mp_hal_pin_obj_t pin) {
gpio_set_pin_direction(pin, GPIO_DIRECTION_IN);
machine_pin_open_drain_mask[pin / 32] &= ~(1 << (pin % 32));
}
static inline void mp_hal_pin_output(mp_hal_pin_obj_t pin) {
gpio_set_pin_direction(pin, GPIO_DIRECTION_OUT);
machine_pin_open_drain_mask[pin / 32] &= ~(1 << (pin % 32));
}
static inline void mp_hal_pin_open_drain(mp_hal_pin_obj_t pin) {
gpio_set_pin_direction(pin, GPIO_DIRECTION_IN);
gpio_set_pin_pull_mode(pin, GPIO_PULL_UP);
machine_pin_open_drain_mask[pin / 32] |= 1 << (pin % 32);
}
static inline unsigned int mp_hal_get_pin_direction(mp_hal_pin_obj_t pin) {
return (PORT->Group[pin / 32].DIR.reg & (1 << (pin % 32))) >> (pin % 32);
}
static inline int mp_hal_pin_read(mp_hal_pin_obj_t pin) {
return gpio_get_pin_level(pin);
}
static inline void mp_hal_pin_write(mp_hal_pin_obj_t pin, int v) {
gpio_set_pin_level(pin, v);
}
static inline void mp_hal_pin_low(mp_hal_pin_obj_t pin) {
gpio_set_pin_level(pin, 0);
}
static inline void mp_hal_pin_high(mp_hal_pin_obj_t pin) {
gpio_set_pin_level(pin, 1);
}
static inline void mp_hal_pin_od_low(mp_hal_pin_obj_t pin) {
gpio_set_pin_direction(pin, GPIO_DIRECTION_OUT);
gpio_set_pin_level(pin, 0);
}
static inline void mp_hal_pin_od_high(mp_hal_pin_obj_t pin) {
gpio_set_pin_direction(pin, GPIO_DIRECTION_IN);
gpio_set_pin_pull_mode(pin, GPIO_PULL_UP);
}
#endif // MICROPY_INCLUDED_SAMD_MPHALPORT_H