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circuitpython/ports/stm32/boardctrl.c
Jim Mussared 986ad6bf1d stm32/boardctrl: Use HAL_Delay instead of mp_hal_delay_ms. 
Not safe to use mp_hal_delay_ms before boot if threading is enabled,
because threading will not have been initialised, and
MICROPY_EVENT_POLL_HOOK assumes threading is initialised.

HAL_Delay doesn't call MICROPY_EVENT_POLL_HOOK, but is still
power-efficient like mp_hal_delay_ms (unlike mp_hal_delay_us).

Fixes #7816.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
2022-08-26 12:48:04 +10:00

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013-2020 Damien P. George
*
* 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 <string.h>
#include "py/runtime.h"
#include "py/objstr.h"
#include "py/mphal.h"
#include "shared/runtime/pyexec.h"
#include "boardctrl.h"
#include "powerctrl.h"
#include "led.h"
#include "usrsw.h"
NORETURN void boardctrl_fatal_error(const char *msg) {
for (volatile uint delay = 0; delay < 10000000; delay++) {
}
led_state(1, 1);
led_state(2, 1);
led_state(3, 1);
led_state(4, 1);
mp_hal_stdout_tx_strn("\nFATAL ERROR:\n", 14);
mp_hal_stdout_tx_strn(msg, strlen(msg));
for (uint i = 0;;) {
led_toggle(((i++) & 3) + 1);
for (volatile uint delay = 0; delay < 10000000; delay++) {
}
if (i >= 16) {
// to conserve power
__WFI();
}
}
}
STATIC void flash_error(int n) {
for (int i = 0; i < n; i++) {
led_state(PYB_LED_RED, 1);
led_state(PYB_LED_GREEN, 0);
mp_hal_delay_ms(250);
led_state(PYB_LED_RED, 0);
led_state(PYB_LED_GREEN, 1);
mp_hal_delay_ms(250);
}
led_state(PYB_LED_GREEN, 0);
}
#if MICROPY_HW_USES_BOOTLOADER
void boardctrl_maybe_enter_mboot(size_t n_args, const void *args_in) {
const mp_obj_t *args = args_in;
if (n_args == 0 || !mp_obj_is_true(args[0])) {
// By default, with no args given, we enter the custom bootloader (mboot)
powerctrl_enter_bootloader(0x70ad0000, MBOOT_VTOR);
}
if (n_args == 1 && mp_obj_is_str_or_bytes(args[0])) {
// With a string/bytes given, pass its data to the custom bootloader
size_t len;
const char *data = mp_obj_str_get_data(args[0], &len);
void *mboot_region = (void *)*((volatile uint32_t *)MBOOT_VTOR);
memmove(mboot_region, data, len);
powerctrl_enter_bootloader(0x70ad0080, MBOOT_VTOR);
}
}
#endif
#if !MICROPY_HW_USES_BOOTLOADER
STATIC uint update_reset_mode(uint reset_mode) {
// Note: Must use HAL_Delay here as MicroPython is not yet initialised
// and mp_hal_delay_ms will attempt to invoke the scheduler.
#if MICROPY_HW_HAS_SWITCH
if (switch_get()) {
// The original method used on the pyboard is appropriate if you have 2
// or more LEDs.
#if defined(MICROPY_HW_LED2)
for (uint i = 0; i < 100; i++) {
led_state(2, reset_mode & 1);
led_state(3, reset_mode & 2);
led_state(4, reset_mode & 4);
for (uint j = 0; j < 30; ++j) {
HAL_Delay(20);
if (!switch_get()) {
goto select_mode;
}
}
if (++reset_mode > BOARDCTRL_RESET_MODE_FACTORY_FILESYSTEM) {
reset_mode = BOARDCTRL_RESET_MODE_NORMAL;
}
}
select_mode:
// flash the selected reset mode
for (uint i = 0; i < 6; i++) {
led_state(2, 0);
led_state(3, 0);
led_state(4, 0);
HAL_Delay(50);
led_state(2, reset_mode & 1);
led_state(3, reset_mode & 2);
led_state(4, reset_mode & 4);
HAL_Delay(50);
}
HAL_Delay(400);
#elif defined(MICROPY_HW_LED1)
// For boards with only a single LED, we'll flash that LED the
// appropriate number of times, with a pause between each one
for (uint i = 0; i < 10; i++) {
led_state(1, 0);
for (uint j = 0; j < reset_mode; j++) {
if (!switch_get()) {
break;
}
led_state(1, 1);
HAL_Delay(100);
led_state(1, 0);
HAL_Delay(200);
}
HAL_Delay(400);
if (!switch_get()) {
break;
}
if (++reset_mode > BOARDCTRL_RESET_MODE_FACTORY_FILESYSTEM) {
reset_mode = BOARDCTRL_RESET_MODE_NORMAL;
}
}
// Flash the selected reset mode
for (uint i = 0; i < 2; i++) {
for (uint j = 0; j < reset_mode; j++) {
led_state(1, 1);
HAL_Delay(100);
led_state(1, 0);
HAL_Delay(200);
}
HAL_Delay(400);
}
#else
#error Need a reset mode update method
#endif
}
#endif
return reset_mode;
}
#endif
void boardctrl_before_soft_reset_loop(boardctrl_state_t *state) {
#if !MICROPY_HW_USES_BOOTLOADER
// Update the reset_mode via the default
// method which uses the board switch/button and LEDs.
state->reset_mode = update_reset_mode(BOARDCTRL_RESET_MODE_NORMAL);
#endif
}
void boardctrl_top_soft_reset_loop(boardctrl_state_t *state) {
// Turn on a single LED to indicate start up.
#if defined(MICROPY_HW_LED2)
led_state(1, 0);
led_state(2, 1);
#else
led_state(1, 1);
led_state(2, 0);
#endif
led_state(3, 0);
led_state(4, 0);
}
int boardctrl_run_boot_py(boardctrl_state_t *state) {
bool run_boot_py = state->reset_mode != BOARDCTRL_RESET_MODE_SAFE_MODE;
if (run_boot_py) {
// Run boot.py, if it exists.
const char *boot_py = "boot.py";
int ret = pyexec_file_if_exists(boot_py);
// Take action based on the execution result.
if (ret & PYEXEC_FORCED_EXIT) {
return BOARDCTRL_GOTO_SOFT_RESET_EXIT;
}
if (!ret) {
// There was an error, prevent main.py from running and flash LEDs.
state->reset_mode = BOARDCTRL_RESET_MODE_SAFE_MODE;
flash_error(4);
}
}
// Turn boot-up LEDs off
#if !defined(MICROPY_HW_LED2)
// If there is only one LED on the board then it's used to signal boot-up
// and so we turn it off here. Otherwise LED(1) is used to indicate dirty
// flash cache and so we shouldn't change its state.
led_state(1, 0);
#endif
led_state(2, 0);
led_state(3, 0);
led_state(4, 0);
return BOARDCTRL_CONTINUE;
}
int boardctrl_run_main_py(boardctrl_state_t *state) {
bool run_main_py = state->reset_mode != BOARDCTRL_RESET_MODE_SAFE_MODE
&& pyexec_mode_kind == PYEXEC_MODE_FRIENDLY_REPL;
if (run_main_py) {
// Run main.py (or what it was configured to be), if it exists.
const char *main_py;
if (MP_STATE_PORT(pyb_config_main) == MP_OBJ_NULL) {
main_py = "main.py";
} else {
main_py = mp_obj_str_get_str(MP_STATE_PORT(pyb_config_main));
}
int ret = pyexec_file_if_exists(main_py);
// Take action based on the execution result.
if (ret & PYEXEC_FORCED_EXIT) {
return BOARDCTRL_GOTO_SOFT_RESET_EXIT;
}
if (!ret) {
flash_error(3);
}
}
return BOARDCTRL_CONTINUE;
}
void boardctrl_start_soft_reset(boardctrl_state_t *state) {
state->log_soft_reset = true;
}
void boardctrl_end_soft_reset(boardctrl_state_t *state) {
// Set reset_mode to normal boot.
state->reset_mode = BOARDCTRL_RESET_MODE_NORMAL;
}
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