349 lines
10 KiB
C
349 lines
10 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) 2021 Scott Shawcroft for Adafruit Industries
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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 <string.h>
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#include <stdlib.h>
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#include "supervisor/background_callback.h"
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#include "supervisor/board.h"
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#include "supervisor/port.h"
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#include "bindings/rp2pio/StateMachine.h"
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#include "genhdr/mpversion.h"
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#include "shared-bindings/audiopwmio/PWMAudioOut.h"
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#include "shared-bindings/busio/I2C.h"
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#include "shared-bindings/busio/SPI.h"
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#include "shared-bindings/countio/Counter.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "shared-bindings/rtc/__init__.h"
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#include "shared-bindings/pwmio/PWMOut.h"
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#if CIRCUITPY_SSL
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#include "common-hal/ssl/__init__.h"
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#endif
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#if CIRCUITPY_WIFI
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#include "common-hal/wifi/__init__.h"
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#endif
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#include "common-hal/rtc/RTC.h"
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#include "common-hal/busio/UART.h"
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#include "supervisor/shared/safe_mode.h"
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#include "supervisor/shared/stack.h"
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#include "supervisor/shared/tick.h"
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#include "src/rp2040/hardware_structs/include/hardware/structs/watchdog.h"
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#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
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#include "src/rp2_common/hardware_uart/include/hardware/uart.h"
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#include "src/rp2_common/hardware_sync/include/hardware/sync.h"
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#include "src/rp2_common/hardware_timer/include/hardware/timer.h"
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#if CIRCUITPY_CYW43
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#include "py/mphal.h"
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#include "pico/cyw43_arch.h"
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#endif
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#include "src/common/pico_time/include/pico/time.h"
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#include "src/common/pico_binary_info/include/pico/binary_info.h"
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#include "pico/bootrom.h"
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#include "hardware/watchdog.h"
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#include "supervisor/serial.h"
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#include "tusb.h"
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#include <cmsis_compiler.h>
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critical_section_t background_queue_lock;
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extern volatile bool mp_msc_enabled;
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STATIC void _tick_callback(uint alarm_num);
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STATIC void _binary_info(void) {
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// Binary info readable with `picotool`.
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bi_decl(bi_program_name("CircuitPython"));
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bi_decl(bi_program_version_string(MICROPY_GIT_TAG));
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bi_decl(bi_program_build_date_string(MICROPY_BUILD_DATE));
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bi_decl(bi_program_url("https://circuitpython.org"));
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bi_decl(bi_program_build_attribute("BOARD=" CIRCUITPY_BOARD_ID));
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// TODO: Add build attribute for debug builds. Needs newer CircuitPython with CIRCUITPY_DEBUG.
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}
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extern uint32_t _ld_dtcm_bss_start;
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extern uint32_t _ld_dtcm_bss_size;
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extern uint32_t _ld_dtcm_data_destination;
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extern uint32_t _ld_dtcm_data_size;
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extern uint32_t _ld_dtcm_data_flash_copy;
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extern uint32_t _ld_itcm_destination;
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extern uint32_t _ld_itcm_size;
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extern uint32_t _ld_itcm_flash_copy;
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safe_mode_t port_init(void) {
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_binary_info();
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// Set brown out.
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// Load from the XIP memory space that doesn't cache. That way we don't
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// evict anything else. The code we're loading is linked to the RAM address
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// anyway.
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size_t nocache = 0x03000000;
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// Copy all of the "tightly coupled memory" code and data to run from RAM.
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// This lets us use the 16k cache for dynamically used data and code.
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// We must do this before we try and call any of its code or load the data.
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uint32_t *itcm_flash_copy = (uint32_t *)(((size_t)&_ld_itcm_flash_copy) | nocache);
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for (uint32_t i = 0; i < ((size_t)&_ld_itcm_size) / 4; i++) {
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(&_ld_itcm_destination)[i] = itcm_flash_copy[i];
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}
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// Copy all of the data to run from DTCM.
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uint32_t *dtcm_flash_copy = (uint32_t *)(((size_t)&_ld_dtcm_data_flash_copy) | nocache);
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for (uint32_t i = 0; i < ((size_t)&_ld_dtcm_data_size) / 4; i++) {
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(&_ld_dtcm_data_destination)[i] = dtcm_flash_copy[i];
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}
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// Clear DTCM bss.
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for (uint32_t i = 0; i < ((size_t)&_ld_dtcm_bss_size) / 4; i++) {
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(&_ld_dtcm_bss_start)[i] = 0;
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}
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// Set up the critical section to protect the background task queue.
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critical_section_init(&background_queue_lock);
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#if CIRCUITPY_CYW43
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never_reset_pin_number(23);
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never_reset_pin_number(24);
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never_reset_pin_number(25);
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never_reset_pin_number(29);
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#endif
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// Reset everything into a known state before board_init.
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reset_port();
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// Initialize RTC
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common_hal_rtc_init();
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// For the tick.
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hardware_alarm_claim(0);
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hardware_alarm_set_callback(0, _tick_callback);
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// Check brownout.
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#if CIRCUITPY_CYW43
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// A small number of samples of pico w need an additional delay before
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// initializing the cyw43 chip. Delays inside cyw43_arch_init_with_country
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// are intended to meet the power on timing requirements, but apparently
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// are inadequate. We'll back off this long delay based on future testing.
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mp_hal_delay_ms(1000);
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// Change this as a placeholder as to how to init with country code.
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// Default country code is CYW43_COUNTRY_WORLDWIDE)
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if (cyw43_arch_init_with_country(PICO_CYW43_ARCH_DEFAULT_COUNTRY_CODE)) {
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serial_write("WiFi init failed\n");
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} else {
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cyw_ever_init = true;
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}
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#endif
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if (board_requests_safe_mode()) {
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return SAFE_MODE_USER;
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}
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return SAFE_MODE_NONE;
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}
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void reset_port(void) {
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#if CIRCUITPY_BUSIO
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reset_i2c();
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reset_spi();
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reset_uart();
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#endif
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#if CIRCUITPY_COUNTIO
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reset_countio();
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#endif
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#if CIRCUITPY_PWMIO
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pwmout_reset();
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#endif
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#if CIRCUITPY_RP2PIO
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reset_rp2pio_statemachine();
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#endif
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#if CIRCUITPY_RTC
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rtc_reset();
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#endif
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#if CIRCUITPY_AUDIOPWMIO
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audiopwmout_reset();
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#endif
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#if CIRCUITPY_AUDIOCORE
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audio_dma_reset();
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#endif
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#if CIRCUITPY_SSL
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ssl_reset();
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#endif
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#if CIRCUITPY_WATCHDOG
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watchdog_reset();
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#endif
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#if CIRCUITPY_WIFI
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wifi_reset();
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#endif
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reset_all_pins();
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}
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void reset_to_bootloader(void) {
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reset_usb_boot(0, 0);
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while (true) {
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}
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}
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void reset_cpu(void) {
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watchdog_reboot(0, SRAM_END, 0);
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watchdog_start_tick(12);
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while (true) {
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__wfi();
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}
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}
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// From the linker script
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extern uint32_t _ld_cp_dynamic_mem_start;
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extern uint32_t _ld_cp_dynamic_mem_end;
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uint32_t *port_stack_get_limit(void) {
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Warray-bounds"
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return port_stack_get_top() - (CIRCUITPY_DEFAULT_STACK_SIZE + CIRCUITPY_EXCEPTION_STACK_SIZE) / sizeof(uint32_t);
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#pragma GCC diagnostic pop
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}
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uint32_t *port_stack_get_top(void) {
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return &_ld_cp_dynamic_mem_end;
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}
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uint32_t *port_heap_get_bottom(void) {
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return &_ld_cp_dynamic_mem_start;
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}
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uint32_t *port_heap_get_top(void) {
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return port_stack_get_limit();
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}
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uint32_t __uninitialized_ram(saved_word);
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void port_set_saved_word(uint32_t value) {
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// Store in RAM because the watchdog scratch registers don't survive
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// resetting by pulling the RUN pin low.
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saved_word = value;
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}
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uint32_t port_get_saved_word(void) {
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return saved_word;
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}
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static volatile bool ticks_enabled;
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static volatile bool _woken_up;
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uint64_t port_get_raw_ticks(uint8_t *subticks) {
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uint64_t microseconds = time_us_64();
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return 1024 * (microseconds / 1000000) + (microseconds % 1000000) / 977;
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}
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STATIC void _tick_callback(uint alarm_num) {
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if (ticks_enabled) {
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supervisor_tick();
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hardware_alarm_set_target(0, delayed_by_us(get_absolute_time(), 977));
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}
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_woken_up = true;
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}
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// Enable 1/1024 second tick.
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void port_enable_tick(void) {
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ticks_enabled = true;
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hardware_alarm_set_target(0, delayed_by_us(get_absolute_time(), 977));
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}
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// Disable 1/1024 second tick.
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void port_disable_tick(void) {
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// One additional _tick_callback may occur, but it will just return
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// whenever !ticks_enabled. Cancel is not called just in case
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// it could nuke a timeout set by port_interrupt_after_ticks.
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ticks_enabled = false;
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}
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// This is called by sleep, we ignore it when our ticks are enabled because
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// they'll wake us up earlier. If we don't, we'll mess up ticks by overwriting
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// the next RTC wake up time.
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void port_interrupt_after_ticks(uint32_t ticks) {
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if (!ticks_enabled) {
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hardware_alarm_set_target(0, delayed_by_us(get_absolute_time(), ticks * 977));
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}
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_woken_up = false;
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}
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void port_idle_until_interrupt(void) {
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common_hal_mcu_disable_interrupts();
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if (!background_callback_pending() && !tud_task_event_ready() && !tuh_task_event_ready() && !_woken_up) {
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__DSB();
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__WFI();
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}
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common_hal_mcu_enable_interrupts();
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}
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/**
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* \brief Default interrupt handler for unused IRQs.
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*/
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extern void HardFault_Handler(void); // provide a prototype to avoid a missing-prototypes diagnostic
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__attribute__((used)) void __not_in_flash_func(HardFault_Handler)(void) {
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// Only safe mode from core 0 which is running CircuitPython. Core 1 faulting
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// should not be fatal to CP. (Fingers crossed.)
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if (get_core_num() == 0) {
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reset_into_safe_mode(SAFE_MODE_HARD_FAULT);
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}
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while (true) {
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asm ("nop;");
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}
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}
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void port_yield() {
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#if CIRCUITPY_CYW43
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cyw43_arch_poll();
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#endif
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}
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void port_boot_info(void) {
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#if CIRCUITPY_CYW43
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mp_printf(&mp_plat_print, "MAC");
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for (int i = 0; i < 6; i++) {
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mp_printf(&mp_plat_print, ":%02X", cyw43_state.mac[i]);
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}
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mp_printf(&mp_plat_print, "\n");
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#endif
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}
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