/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2017 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 "boards/board.h" #include "supervisor/port.h" // ASF 4 #include "atmel_start_pins.h" #include "hal/include/hal_delay.h" #include "hal/include/hal_gpio.h" #include "hal/include/hal_init.h" #include "hal/include/hal_usb_device.h" #include "hpl/gclk/hpl_gclk_base.h" #include "hpl/pm/hpl_pm_base.h" #ifdef SAMD21 #include "hri/hri_pm_d21.h" #endif #ifdef SAMD51 #include "hri/hri_rstc_d51.h" #endif #include "common-hal/analogio/AnalogIn.h" #include "common-hal/analogio/AnalogOut.h" #include "common-hal/audiobusio/PDMIn.h" #include "common-hal/audiobusio/I2SOut.h" #include "common-hal/audioio/AudioOut.h" #include "common-hal/microcontroller/Pin.h" #include "common-hal/pulseio/PulseIn.h" #include "common-hal/pulseio/PulseOut.h" #include "common-hal/pulseio/PWMOut.h" #include "common-hal/rtc/RTC.h" #include "common-hal/touchio/TouchIn.h" #include "common-hal/usb_hid/Device.h" #include "samd/cache.h" #include "samd/clocks.h" #include "samd/events.h" #include "samd/external_interrupts.h" #include "samd/dma.h" #include "shared-bindings/rtc/__init__.h" #include "tick.h" #include "usb.h" #ifdef CIRCUITPY_GAMEPAD_TICKS #include "shared-module/gamepad/__init__.h" #endif extern volatile bool mp_msc_enabled; #if defined(SAMD21) && defined(ENABLE_MICRO_TRACE_BUFFER) // Stores 2 ^ TRACE_BUFFER_MAGNITUDE_PACKETS packets. // 7 -> 128 packets #define TRACE_BUFFER_MAGNITUDE_PACKETS 7 // Size in uint32_t. Two per packet. #define TRACE_BUFFER_SIZE (1 << (TRACE_BUFFER_MAGNITUDE_PACKETS + 1)) // Size in bytes. 4 bytes per uint32_t. #define TRACE_BUFFER_SIZE_BYTES (TRACE_BUFFER_SIZE << 2) __attribute__((__aligned__(TRACE_BUFFER_SIZE_BYTES))) uint32_t mtb[TRACE_BUFFER_SIZE]; #endif safe_mode_t port_init(void) { #if defined(SAMD21) // Set brownout detection to ~2.7V. Default from factory is 1.7V, // which is too low for proper operation of external SPI flash chips (they are 2.7-3.6V). // Disable while changing level. SYSCTRL->BOD33.bit.ENABLE = 0; SYSCTRL->BOD33.bit.LEVEL = 39; // 2.77V with hysteresis off. Table 37.20 in datasheet. SYSCTRL->BOD33.bit.ENABLE = 1; #ifdef ENABLE_MICRO_TRACE_BUFFER REG_MTB_POSITION = ((uint32_t) (mtb - REG_MTB_BASE)) & 0xFFFFFFF8; REG_MTB_FLOW = (((uint32_t) mtb - REG_MTB_BASE) + TRACE_BUFFER_SIZE_BYTES) & 0xFFFFFFF8; REG_MTB_MASTER = 0x80000000 + (TRACE_BUFFER_MAGNITUDE_PACKETS - 1); #else // Triple check that the MTB is off. Switching between debug and non-debug // builds can leave it set over reset and wreak havok as a result. REG_MTB_MASTER = 0x00000000 + 6; #endif #endif #if defined(SAMD51) // Set brownout detection to ~2.7V. Default from factory is 1.7V, // which is too low for proper operation of external SPI flash chips (they are 2.7-3.6V). // Disable while changing level. SUPC->BOD33.bit.ENABLE = 0; SUPC->BOD33.bit.LEVEL = 200; // 2.7V: 1.5V + LEVEL * 6mV. SUPC->BOD33.bit.ENABLE = 1; // MPU (Memory Protection Unit) setup. // We hoped we could make the QSPI region be non-cachable with the MPU, // but the CMCC doesn't seem to pay attention to the MPU settings. // Leaving this code here disabled, // because it was hard enough to figure out, and maybe there's // a mistake that could make it work in the future. #if 0 // Designate QSPI memory mapped region as not cachable. // Turn off MPU in case it is on. MPU->CTRL = 0; // Configure region 0. MPU->RNR = 0; // Region base: start of QSPI mapping area. // QSPI region runs from 0x04000000 up to and not including 0x05000000: 16 megabytes MPU->RBAR = QSPI_AHB; MPU->RASR = 0b011 << MPU_RASR_AP_Pos | // full read/write access for privileged and user mode 0b000 << MPU_RASR_TEX_Pos | // caching not allowed, strongly ordered 1 << MPU_RASR_S_Pos | // sharable 0 << MPU_RASR_C_Pos | // not cachable 0 << MPU_RASR_B_Pos | // not bufferable 0b10111 << MPU_RASR_SIZE_Pos | // 16MB region size 1 << MPU_RASR_ENABLE_Pos // enable this region ; // Turn off regions 1-7. for (uint32_t i = 1; i < 8; i ++) { MPU->RNR = i; MPU->RBAR = 0; MPU->RASR = 0; } // Turn on MPU. Turn on PRIVDEFENA, which defines a default memory // map for all privileged access, so we don't have to set up other regions // besides QSPI. MPU->CTRL = MPU_CTRL_PRIVDEFENA_Msk | MPU_CTRL_ENABLE_Msk; #endif samd_peripherals_enable_cache(); #endif // On power on start or external reset, set _ezero to the canary word. If it // gets killed, we boot in safe mode. _ezero is the boundary between statically // allocated memory including the fixed MicroPython heap and the stack. If either // misbehaves, the canary will not be intact after soft reset. #ifdef CIRCUITPY_CANARY_WORD #ifdef SAMD21 bool power_on_or_external_reset = hri_pm_get_RCAUSE_POR_bit(PM) || hri_pm_get_RCAUSE_EXT_bit(PM); bool system_reset = hri_pm_get_RCAUSE_SYST_bit(PM); #endif #ifdef SAMD51 bool power_on_or_external_reset = hri_rstc_get_RCAUSE_POR_bit(RSTC) || hri_rstc_get_RCAUSE_EXT_bit(RSTC); bool system_reset = hri_rstc_get_RCAUSE_SYST_bit(RSTC); #endif if (power_on_or_external_reset) { _ezero = CIRCUITPY_CANARY_WORD; } else if (system_reset) { // If we're starting from a system reset we're likely coming from the // bootloader or hard fault handler. If we're coming from the handler // the canary will be CIRCUITPY_SAFE_RESTART_WORD and we don't want to // revive the canary so that a second hard fault won't restart. Resets // from anywhere else are ok. if (_ezero == CIRCUITPY_SAFE_RESTART_WORD) { _ezero = ~CIRCUITPY_CANARY_WORD; } else { _ezero = CIRCUITPY_CANARY_WORD; } } #endif #ifdef SAMD21 hri_nvmctrl_set_CTRLB_RWS_bf(NVMCTRL, 2); _pm_init(); #endif clock_init(); board_init(); // Configure millisecond timer initialization. tick_init(); #ifndef PIRKEY_M0 rtc_init(); #endif init_shared_dma(); #ifdef CIRCUITPY_CANARY_WORD // Run in safe mode if the canary is corrupt. if (_ezero != CIRCUITPY_CANARY_WORD) { return HARD_CRASH; } #endif #ifdef SAMD21 if (PM->RCAUSE.bit.BOD33 == 1 || PM->RCAUSE.bit.BOD12 == 1) { return BROWNOUT; } #endif #ifdef SAMD51 if (RSTC->RCAUSE.bit.BODVDD == 1 || RSTC->RCAUSE.bit.BODCORE == 1) { return BROWNOUT; } #endif if (board_requests_safe_mode()) { return USER_SAFE_MODE; } return NO_SAFE_MODE; } void reset_port(void) { // Reset all SERCOMs except the ones being used by on-board devices. Sercom *sercom_instances[SERCOM_INST_NUM] = SERCOM_INSTS; for (int i = 0; i < SERCOM_INST_NUM; i++) { #ifdef SPI_FLASH_SERCOM if (sercom_instances[i] == SPI_FLASH_SERCOM) { continue; } #endif #ifdef MICROPY_HW_APA102_SERCOM if (sercom_instances[i] == MICROPY_HW_APA102_SERCOM) { continue; } #endif // SWRST is same for all modes of SERCOMs. sercom_instances[i]->SPI.CTRLA.bit.SWRST = 1; } #ifdef EXPRESS_BOARD audioout_reset(); #if !defined(__SAMD51G19A__) && !defined(__SAMD51G18A__) i2sout_reset(); #endif audio_dma_reset(); //pdmin_reset(); #endif #ifdef SAMD21 touchin_reset(); #endif eic_reset(); pulseout_reset(); pwmout_reset(); #ifndef PIRKEY_M0 analogin_reset(); analogout_reset(); rtc_reset(); #endif reset_gclks(); #ifdef CIRCUITPY_GAMEPAD_TICKS gamepad_reset(); #endif reset_event_system(); reset_all_pins(); // Output clocks for debugging. // not supported by SAMD51G; uncomment for SAMD51J or update for 51G // #ifdef SAMD51 // gpio_set_pin_function(PIN_PA10, GPIO_PIN_FUNCTION_M); // GCLK4, D3 // gpio_set_pin_function(PIN_PA11, GPIO_PIN_FUNCTION_M); // GCLK5, A4 // gpio_set_pin_function(PIN_PB14, GPIO_PIN_FUNCTION_M); // GCLK0, D5 // gpio_set_pin_function(PIN_PB15, GPIO_PIN_FUNCTION_M); // GCLK1, D6 // #endif usb_hid_reset(); if (usb_connected()) { save_usb_clock_calibration(); } } /** * \brief Default interrupt handler for unused IRQs. */ __attribute__((used)) void HardFault_Handler(void) { while (true) { asm(""); } for (uint32_t i = 0; i < 100000; i++) { asm("noop;"); } }