mirror of
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272 lines
8.0 KiB
C
272 lines
8.0 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) 2023 Damien P. George
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* Copyright (c) 2024 OpenMV LLC.
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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 "py/mphal.h"
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#include "py/ringbuf.h"
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#include "py/runtime.h"
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#include "py/stream.h"
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#include "extmod/misc.h"
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#include "shared/runtime/interrupt_char.h"
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#include "shared/runtime/softtimer.h"
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#include "shared/timeutils/timeutils.h"
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#include "shared/tinyusb/mp_usbd.h"
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#include "shared/tinyusb/mp_usbd_cdc.h"
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#include "tusb.h"
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#include "mpuart.h"
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#include "pendsv.h"
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#include "se_services.h"
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#include "system_tick.h"
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#ifndef MICROPY_HW_STDIN_BUFFER_LEN
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#define MICROPY_HW_STDIN_BUFFER_LEN 512
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#endif
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static uint8_t stdin_ringbuf_array[MICROPY_HW_STDIN_BUFFER_LEN];
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ringbuf_t stdin_ringbuf = { stdin_ringbuf_array, sizeof(stdin_ringbuf_array) };
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uintptr_t mp_hal_stdio_poll(uintptr_t poll_flags) {
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uintptr_t ret = 0;
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#if MICROPY_HW_USB_CDC
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ret |= mp_usbd_cdc_poll_interfaces(poll_flags);
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#endif
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#if MICROPY_HW_ENABLE_UART_REPL
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if (poll_flags & MP_STREAM_POLL_WR) {
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ret |= MP_STREAM_POLL_WR;
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}
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#endif
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#if MICROPY_PY_OS_DUPTERM
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ret |= mp_os_dupterm_poll(poll_flags);
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#endif
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return ret;
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}
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// Receive single character
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int mp_hal_stdin_rx_chr(void) {
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for (;;) {
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#if MICROPY_HW_USB_CDC
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mp_usbd_cdc_poll_interfaces(0);
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#endif
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int c = ringbuf_get(&stdin_ringbuf);
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if (c != -1) {
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return c;
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}
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#if MICROPY_PY_OS_DUPTERM
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int dupterm_c = mp_os_dupterm_rx_chr();
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if (dupterm_c >= 0) {
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return dupterm_c;
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}
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#endif
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mp_event_wait_indefinite();
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}
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}
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// Send string of given length
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mp_uint_t mp_hal_stdout_tx_strn(const char *str, size_t len) {
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#if MICROPY_HW_ENABLE_UART_REPL || MICROPY_HW_USB_CDC || MICROPY_PY_OS_DUPTERM
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mp_uint_t ret = len;
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bool did_write = false;
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#endif
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#if MICROPY_HW_ENABLE_UART_REPL
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mp_uart_write_strn_repl(str, len);
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did_write = true;
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#endif
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#if MICROPY_HW_USB_CDC
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mp_uint_t cdc_res = mp_usbd_cdc_tx_strn(str, len);
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if (cdc_res > 0) {
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did_write = true;
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ret = MIN(cdc_res, ret);
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}
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#endif
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#if MICROPY_PY_OS_DUPTERM
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int dupterm_res = mp_os_dupterm_tx_strn(str, len);
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if (dupterm_res >= 0) {
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did_write = true;
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ret = MIN((mp_uint_t)dupterm_res, ret);
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}
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#endif
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return did_write ? ret : 0;
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}
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mp_uint_t mp_hal_ticks_cpu(void) {
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return system_tick_get_u32();
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}
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mp_uint_t mp_hal_ticks_us(void) {
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// Convert system tick to microsecond counter.
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#if MICROPY_HW_SYSTEM_TICK_USE_SYSTICK
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return system_tick_get_u64();
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#elif MICROPY_HW_SYSTEM_TICK_USE_LPTIMER
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return system_tick_get_u64() * 1000000 / system_tick_source_hz;
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#else
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return system_tick_get_u64() / system_core_clock_mhz;
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#endif
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}
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mp_uint_t mp_hal_ticks_ms(void) {
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// Convert system tick to millisecond counter.
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#if MICROPY_HW_SYSTEM_TICK_USE_SYSTICK
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return system_tick_get_u64() / 1000ULL;
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#elif MICROPY_HW_SYSTEM_TICK_USE_LPTIMER
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return system_tick_get_u64() * 1000ULL / system_tick_source_hz;
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#else
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return system_tick_get_u64() / (SystemCoreClock / 1000);
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#endif
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}
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void mp_hal_delay_us(mp_uint_t us) {
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#if MICROPY_HW_SYSTEM_TICK_USE_SYSTICK
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uint64_t ticks_delay = (uint64_t)us;
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#elif MICROPY_HW_SYSTEM_TICK_USE_LPTIMER
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uint64_t ticks_delay = (uint64_t)us * system_tick_source_hz / 1000000;
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#else
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uint64_t ticks_delay = (uint64_t)us * system_core_clock_mhz;
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#endif
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uint64_t start = system_tick_get_u64();
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while (system_tick_get_u64() - start < ticks_delay) {
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}
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}
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void mp_hal_delay_ms(mp_uint_t ms) {
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uint32_t t0 = mp_hal_ticks_ms();
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mp_event_handle_nowait();
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for (;;) {
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uint32_t t1 = mp_hal_ticks_ms();
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if (t1 - t0 >= ms) {
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break;
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}
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mp_event_wait_ms(ms - (t1 - t0));
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}
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}
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uint64_t mp_hal_time_ns(void) {
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uint32_t microseconds;
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uint32_t s = mp_hal_time_get(µseconds);
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return (uint64_t)s * 1000000000ULL + (uint64_t)microseconds * 1000ULL;
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}
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void mp_hal_pin_config(const machine_pin_obj_t *pin, uint32_t mode,
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uint32_t pull, uint32_t speed, uint32_t drive, uint32_t alt, bool ren) {
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uint8_t alt_func = PINMUX_ALTERNATE_FUNCTION_0;
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uint8_t pad_ctrl = drive | speed | (ren ? PADCTRL_READ_ENABLE : 0);
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// Configure pull-up or pull-down.
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if (pull & MP_HAL_PIN_PULL_UP) {
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pad_ctrl |= PADCTRL_DRIVER_DISABLED_PULL_UP;
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}
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if (pull & MP_HAL_PIN_PULL_DOWN) {
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pad_ctrl |= PADCTRL_DRIVER_DISABLED_PULL_DOWN;
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}
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// Configure open-drain mode.
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if (mode == MP_HAL_PIN_MODE_OPEN_DRAIN) {
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pad_ctrl |= PADCTRL_DRIVER_OPEN_DRAIN;
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}
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// For ALT mode, find alternate function.
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if (mode == MP_HAL_PIN_MODE_ALT) {
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for (mp_uint_t i = 0; i < MP_ARRAY_SIZE(pin->alt); i++) {
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if (alt == pin->alt[i]) {
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alt_func = i;
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break;
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}
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}
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if (alt_func == PINMUX_ALTERNATE_FUNCTION_0) {
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mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("invalid pin af: %d"), alt);
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}
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}
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// Set pad config.
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pinconf_set(pin->port, pin->pin, alt_func, pad_ctrl);
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// For INPUT/OUTPUT/OD modes, set the GPIO direction.
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switch (mode) {
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case MP_HAL_PIN_MODE_INPUT:
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gpio_set_direction_input(pin->gpio, pin->pin);
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break;
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case MP_HAL_PIN_MODE_OUTPUT:
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case MP_HAL_PIN_MODE_OPEN_DRAIN:
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gpio_set_direction_output(pin->gpio, pin->pin);
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break;
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default:
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break;
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}
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}
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void system_tick_schedule_callback(void) {
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pendsv_schedule_dispatch(PENDSV_DISPATCH_SOFT_TIMER, soft_timer_handler);
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}
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#if !defined(MICROPY_SOFT_TIMER_TICKS_MS)
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uint32_t soft_timer_get_ms(void) {
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return mp_hal_ticks_ms();
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}
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void soft_timer_schedule_at_ms(uint32_t ticks_ms) {
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int32_t ms = soft_timer_ticks_diff(ticks_ms, mp_hal_ticks_ms());
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ms = MAX(0, ms);
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ms = MIN(ms, 4000000); // ensure ms * 1000 doesn't overflow
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system_tick_schedule_after_us(ms * 1000);
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}
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#endif
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/*******************************************************************************/
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// MAC address
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// Generate a random locally administered MAC address (LAA)
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void mp_hal_generate_laa_mac(int idx, uint8_t buf[6]) {
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uint8_t id[8];
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se_services_get_unique_id(id);
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buf[0] = 0x02; // LAA range
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buf[1] = id[4];
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buf[2] = id[3];
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buf[3] = id[2];
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buf[4] = id[1];
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buf[5] = (id[0] << 2) | idx;
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}
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// A board can override this if needed
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MP_WEAK void mp_hal_get_mac(int idx, uint8_t buf[6]) {
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mp_hal_generate_laa_mac(idx, buf);
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}
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void mp_hal_get_mac_ascii(int idx, size_t chr_off, size_t chr_len, char *dest) {
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static const char hexchr[16] = "0123456789ABCDEF";
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uint8_t mac[6];
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mp_hal_get_mac(idx, mac);
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for (; chr_len; ++chr_off, --chr_len) {
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*dest++ = hexchr[mac[chr_off >> 1] >> (4 * (1 - (chr_off & 1))) & 0xf];
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}
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}
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