126 lines
4.7 KiB
C
126 lines
4.7 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 <math.h>
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#include <string.h>
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#include "py/mphal.h"
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#include "py/runtime.h"
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#include "common-hal/microcontroller/Processor.h"
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#include "shared-bindings/microcontroller/Processor.h"
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#include "shared-bindings/microcontroller/ResetReason.h"
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#include "shared-bindings/time/__init__.h"
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#include "pico/stdlib.h"
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#include "src/rp2_common/hardware_adc/include/hardware/adc.h"
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#include "src/rp2_common/hardware_clocks/include/hardware/clocks.h"
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#include "src/rp2_common/hardware_vreg/include/hardware/vreg.h"
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#include "src/rp2_common/hardware_watchdog/include/hardware/watchdog.h"
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#include "src/rp2040/hardware_regs/include/hardware/regs/vreg_and_chip_reset.h"
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#include "src/rp2040/hardware_regs/include/hardware/regs/watchdog.h"
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#include "src/rp2040/hardware_structs/include/hardware/structs/vreg_and_chip_reset.h"
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#include "src/rp2040/hardware_structs/include/hardware/structs/watchdog.h"
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float common_hal_mcu_processor_get_temperature(void) {
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adc_init();
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adc_set_temp_sensor_enabled(true);
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adc_select_input(4);
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uint16_t value = adc_read();
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adc_set_temp_sensor_enabled(false);
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float voltage = value * 3.3 / (1 << 12);
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// TODO: turn the ADC back off
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return 27 - (voltage - 0.706) / 0.001721;
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}
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float common_hal_mcu_processor_get_voltage(void) {
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return NAN;
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}
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uint32_t common_hal_mcu_processor_get_frequency(void) {
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return clock_get_hz(clk_sys);
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}
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void common_hal_mcu_processor_set_frequency(mcu_processor_obj_t *self, uint32_t frequency) {
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uint vco, postdiv1, postdiv2;
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uint32_t freq_khz = frequency / 1000;
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if (!check_sys_clock_khz(freq_khz, &vco, &postdiv1, &postdiv2)) {
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mp_arg_error_invalid(MP_QSTR_frequency);
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}
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// These voltages are approximate based on the PicoDVI examples.
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enum vreg_voltage voltage = VREG_VOLTAGE_1_10;
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if (freq_khz >= 400000) {
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voltage = VREG_VOLTAGE_1_30;
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} else if (freq_khz >= 300000) {
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voltage = VREG_VOLTAGE_1_20;
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} else if (freq_khz > 133000) {
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voltage = VREG_VOLTAGE_1_20;
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}
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vreg_set_voltage(voltage);
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// Wait for a stable voltage
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common_hal_time_delay_ms(10);
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set_sys_clock_khz(freq_khz, false);
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}
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void common_hal_mcu_processor_get_uid(uint8_t raw_id[]) {
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pico_unique_board_id_t retrieved_id;
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pico_get_unique_board_id(&retrieved_id);
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memcpy(raw_id, retrieved_id.id, COMMON_HAL_MCU_PROCESSOR_UID_LENGTH);
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}
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mcu_reset_reason_t common_hal_mcu_processor_get_reset_reason(void) {
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mcu_reset_reason_t reason = RESET_REASON_UNKNOWN;
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uint32_t chip_reset_reg = vreg_and_chip_reset_hw->chip_reset;
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if (chip_reset_reg & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_PSM_RESTART_BITS) {
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reason = RESET_REASON_RESCUE_DEBUG;
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}
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if (chip_reset_reg & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_RUN_BITS) {
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reason = RESET_REASON_RESET_PIN;
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}
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if (chip_reset_reg & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_POR_BITS) {
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// NOTE: This register is also used for brownout, but there is no way to differentiate between power on and brown out
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reason = RESET_REASON_POWER_ON;
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}
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// Check watchdog after chip reset since watchdog doesn't clear chip_reset, while chip_reset clears the watchdog
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// The watchdog is used for software reboots such as resetting after copying a UF2 via the bootloader.
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if (watchdog_caused_reboot()) {
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reason = RESET_REASON_SOFTWARE;
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}
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// Actual watchdog usage will set a special value that this function detects.
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if (watchdog_enable_caused_reboot()) {
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reason = RESET_REASON_WATCHDOG;
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}
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return reason;
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}
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