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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 <math.h>
#include <string.h>
#include "py/mphal.h"
#include "common-hal/microcontroller/Processor.h"
#include "shared-bindings/microcontroller/Processor.h"
#include "shared-bindings/microcontroller/ResetReason.h"
#include "src/rp2_common/hardware_adc/include/hardware/adc.h"
#include "src/rp2_common/hardware_clocks/include/hardware/clocks.h"
#include "src/rp2040/hardware_regs/include/hardware/regs/vreg_and_chip_reset.h"
#include "src/rp2040/hardware_regs/include/hardware/regs/watchdog.h"
#include "src/rp2040/hardware_structs/include/hardware/structs/vreg_and_chip_reset.h"
#include "src/rp2040/hardware_structs/include/hardware/structs/watchdog.h"
float common_hal_mcu_processor_get_temperature(void) {
adc_init();
adc_set_temp_sensor_enabled(true);
adc_select_input(4);
uint16_t value = adc_read();
adc_set_temp_sensor_enabled(false);
float voltage = value * 3.3 / (1 << 12);
// TODO: turn the ADC back off
return 27 - (voltage - 0.706) / 0.001721;
}
float common_hal_mcu_processor_get_voltage(void) {
return 3.3f;
}
uint32_t common_hal_mcu_processor_get_frequency(void) {
return clock_get_hz(clk_sys);
}
void common_hal_mcu_processor_get_uid(uint8_t raw_id[]) {
pico_unique_board_id_t retrieved_id;
pico_get_unique_board_id(&retrieved_id);
memcpy(raw_id, retrieved_id.id, COMMON_HAL_MCU_PROCESSOR_UID_LENGTH);
}
mcu_reset_reason_t common_hal_mcu_processor_get_reset_reason(void) {
mcu_reset_reason_t reason = RESET_REASON_UNKNOWN;
uint32_t watchdog_reset_reg = watchdog_hw->reason;
uint32_t chip_reset_reg = vreg_and_chip_reset_hw->chip_reset;
if (chip_reset_reg & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_PSM_RESTART_BITS) {
reason = RESET_REASON_RESCUE_DEBUG;
}
if (chip_reset_reg & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_RUN_BITS) {
reason = RESET_REASON_RESET_PIN;
}
if (chip_reset_reg & VREG_AND_CHIP_RESET_CHIP_RESET_HAD_POR_BITS) {
// NOTE: This register is also used for brownout, but there is no way to differentiate between power on and brown out
reason = RESET_REASON_POWER_ON;
}
// Check watchdog after chip reset since watchdog doesn't clear chip_reset, while chip_reset clears the watchdog
if (watchdog_reset_reg & WATCHDOG_REASON_TIMER_BITS) {
// This bit can also be set during a software reset because the pico-sdk performs a software reset by setting an extremely low timeout on the watchdog, rather than triggering a watchdog reset manually
reason = RESET_REASON_WATCHDOG;
}
if (watchdog_reset_reg & WATCHDOG_REASON_FORCE_BITS) {
reason = RESET_REASON_SOFTWARE;
}
return reason;
}
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