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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 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 <string.h>
#include <stdlib.h>
#include "supervisor/board.h"
#include "supervisor/port.h"
#include "bindings/rp2pio/StateMachine.h"
#include "genhdr/mpversion.h"
#include "shared-bindings/audiopwmio/PWMAudioOut.h"
#include "shared-bindings/busio/I2C.h"
#include "shared-bindings/busio/SPI.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "shared-bindings/rtc/__init__.h"
#include "shared-bindings/pwmio/PWMOut.h"
#include "common-hal/rtc/RTC.h"
#include "common-hal/busio/UART.h"
#include "supervisor/shared/safe_mode.h"
#include "supervisor/shared/stack.h"
#include "supervisor/shared/tick.h"
#include "src/rp2040/hardware_structs/include/hardware/structs/watchdog.h"
#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
#include "src/rp2_common/hardware_uart/include/hardware/uart.h"
#include "src/rp2_common/hardware_sync/include/hardware/sync.h"
#include "src/rp2_common/hardware_timer/include/hardware/timer.h"
#include "src/common/pico_time/include/pico/time.h"
#include "src/common/pico_binary_info/include/pico/binary_info.h"
#include "tusb.h"
#include "pico/bootrom.h"
#include "hardware/watchdog.h"
extern volatile bool mp_msc_enabled;
STATIC void _tick_callback(uint alarm_num);
STATIC void _binary_info(void) {
// Binary info readable with `picotool`.
bi_decl(bi_program_name("CircuitPython"));
bi_decl(bi_program_version_string(MICROPY_GIT_TAG));
bi_decl(bi_program_build_date_string(MICROPY_BUILD_DATE));
bi_decl(bi_program_url("https://circuitpython.org"));
bi_decl(bi_program_build_attribute("BOARD=" CIRCUITPY_BOARD_ID));
// TODO: Add build attribute for debug builds. Needs newer CircuitPython with CIRCUITPY_DEBUG.
}
safe_mode_t port_init(void) {
_binary_info();
// Set brown out.
// Reset everything into a known state before board_init.
reset_port();
// Initialize RTC
common_hal_rtc_init();
// For the tick.
hardware_alarm_claim(0);
hardware_alarm_set_callback(0, _tick_callback);
// Check brownout.
if (board_requests_safe_mode()) {
return USER_SAFE_MODE;
}
return NO_SAFE_MODE;
}
void reset_port(void) {
#if CIRCUITPY_BUSIO
reset_i2c();
reset_spi();
reset_uart();
#endif
#if CIRCUITPY_PWMIO
pwmout_reset();
#endif
#if CIRCUITPY_RP2PIO
reset_rp2pio_statemachine();
#endif
#if CIRCUITPY_RTC
rtc_reset();
#endif
#if CIRCUITPY_AUDIOPWMIO
audiopwmout_reset();
#endif
#if CIRCUITPY_AUDIOCORE
audio_dma_reset();
#endif
reset_all_pins();
}
void reset_to_bootloader(void) {
reset_usb_boot(0, 0);
while (true) {
}
}
void reset_cpu(void) {
watchdog_reboot(0, SRAM_END, 0);
watchdog_start_tick(12);
while (true) {
__wfi();
}
}
bool port_has_fixed_stack(void) {
return false;
}
// From the linker script
extern uint32_t __HeapLimit;
extern uint32_t __StackTop;
uint32_t *port_stack_get_limit(void) {
return &__HeapLimit;
}
uint32_t *port_stack_get_top(void) {
return &__StackTop;
}
uint32_t *port_heap_get_bottom(void) {
return port_stack_get_limit();
}
uint32_t *port_heap_get_top(void) {
return port_stack_get_top();
}
void port_set_saved_word(uint32_t value) {
// NOTE: This doesn't survive pressing the reset button (aka toggling RUN).
watchdog_hw->scratch[0] = value;
}
uint32_t port_get_saved_word(void) {
return watchdog_hw->scratch[0];
}
uint64_t port_get_raw_ticks(uint8_t *subticks) {
uint64_t microseconds = time_us_64();
return 1024 * (microseconds / 1000000) + (microseconds % 1000000) / 977;
}
STATIC void _tick_callback(uint alarm_num) {
supervisor_tick();
hardware_alarm_set_target(0, delayed_by_us(get_absolute_time(), 977));
}
// Enable 1/1024 second tick.
void port_enable_tick(void) {
hardware_alarm_set_target(0, delayed_by_us(get_absolute_time(), 977));
}
// Disable 1/1024 second tick.
void port_disable_tick(void) {
// hardware_alarm_cancel(0);
}
// This is called by sleep, we ignore it when our ticks are enabled because
// they'll wake us up earlier. If we don't, we'll mess up ticks by overwriting
// the next RTC wake up time.
void port_interrupt_after_ticks(uint32_t ticks) {
}
void port_idle_until_interrupt(void) {
common_hal_mcu_disable_interrupts();
if (!tud_task_event_ready()) {
// asm volatile ("dsb 0xF":::"memory");
// __wfi();
}
common_hal_mcu_enable_interrupts();
}
/**
* \brief Default interrupt handler for unused IRQs.
*/
__attribute__((used)) void HardFault_Handler(void) {
#ifdef ENABLE_MICRO_TRACE_BUFFER
// Turn off the micro trace buffer so we don't fill it up in the infinite
// loop below.
REG_MTB_MASTER = 0x00000000 + 6;
#endif
reset_into_safe_mode(HARD_CRASH);
while (true) {
asm ("nop;");
}
}
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