268 lines
10 KiB
C
268 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) 2020-2021 Damien P. George
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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 "py/runtime.h"
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#include "py/mphal.h"
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#include "shared/runtime/pyexec.h"
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#include "extmod/machine_bitstream.h"
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#include "extmod/machine_i2c.h"
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#include "extmod/machine_mem.h"
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#include "extmod/machine_pulse.h"
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#include "extmod/machine_pwm.h"
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#include "extmod/machine_signal.h"
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#include "extmod/machine_spi.h"
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#include "modmachine.h"
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#include "uart.h"
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#include "hardware/clocks.h"
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#include "hardware/pll.h"
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#include "hardware/structs/rosc.h"
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#include "hardware/structs/scb.h"
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#include "hardware/structs/syscfg.h"
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#include "hardware/watchdog.h"
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#include "hardware/xosc.h"
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#include "pico/bootrom.h"
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#include "pico/stdlib.h"
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#include "pico/unique_id.h"
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#if MICROPY_PY_MACHINE
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#define RP2_RESET_PWRON (1)
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#define RP2_RESET_WDT (3)
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STATIC mp_obj_t machine_unique_id(void) {
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pico_unique_board_id_t id;
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pico_get_unique_board_id(&id);
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return mp_obj_new_bytes(id.id, sizeof(id.id));
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}
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MP_DEFINE_CONST_FUN_OBJ_0(machine_unique_id_obj, machine_unique_id);
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STATIC mp_obj_t machine_soft_reset(void) {
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pyexec_system_exit = PYEXEC_FORCED_EXIT;
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mp_raise_type(&mp_type_SystemExit);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_soft_reset_obj, machine_soft_reset);
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STATIC mp_obj_t machine_reset(void) {
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watchdog_reboot(0, SRAM_END, 0);
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for (;;) {
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__wfi();
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}
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_obj, machine_reset);
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STATIC mp_obj_t machine_reset_cause(void) {
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int reset_cause;
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if (watchdog_caused_reboot()) {
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reset_cause = RP2_RESET_WDT;
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} else {
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reset_cause = RP2_RESET_PWRON;
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}
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return MP_OBJ_NEW_SMALL_INT(reset_cause);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_cause_obj, machine_reset_cause);
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NORETURN mp_obj_t machine_bootloader(size_t n_args, const mp_obj_t *args) {
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MICROPY_BOARD_ENTER_BOOTLOADER(n_args, args);
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rosc_hw->ctrl = ROSC_CTRL_ENABLE_VALUE_ENABLE << ROSC_CTRL_ENABLE_LSB;
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reset_usb_boot(0, 0);
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for (;;) {
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}
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_bootloader_obj, 0, 1, machine_bootloader);
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STATIC mp_obj_t machine_freq(size_t n_args, const mp_obj_t *args) {
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if (n_args == 0) {
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return MP_OBJ_NEW_SMALL_INT(mp_hal_get_cpu_freq());
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} else {
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mp_int_t freq = mp_obj_get_int(args[0]);
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if (!set_sys_clock_khz(freq / 1000, false)) {
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mp_raise_ValueError(MP_ERROR_TEXT("cannot change frequency"));
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}
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#if MICROPY_HW_ENABLE_UART_REPL
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setup_default_uart();
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mp_uart_init();
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#endif
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return mp_const_none;
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}
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_freq_obj, 0, 1, machine_freq);
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STATIC mp_obj_t machine_idle(void) {
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best_effort_wfe_or_timeout(make_timeout_time_ms(1));
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);
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STATIC mp_obj_t machine_lightsleep(size_t n_args, const mp_obj_t *args) {
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mp_int_t delay_ms = 0;
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bool use_timer_alarm = false;
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if (n_args == 1) {
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delay_ms = mp_obj_get_int(args[0]);
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if (delay_ms <= 1) {
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// Sleep is too small, just use standard delay.
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mp_hal_delay_ms(delay_ms);
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return mp_const_none;
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}
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use_timer_alarm = delay_ms < (1ULL << 32) / 1000;
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if (use_timer_alarm) {
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// Use timer alarm to wake.
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} else {
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// TODO: Use RTC alarm to wake.
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mp_raise_ValueError(MP_ERROR_TEXT("sleep too long"));
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}
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}
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const uint32_t xosc_hz = XOSC_MHZ * 1000000;
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// Disable USB and ADC clocks.
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clock_stop(clk_usb);
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clock_stop(clk_adc);
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// CLK_REF = XOSC
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clock_configure(clk_ref, CLOCKS_CLK_REF_CTRL_SRC_VALUE_XOSC_CLKSRC, 0, xosc_hz, xosc_hz);
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// CLK_SYS = CLK_REF
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clock_configure(clk_sys, CLOCKS_CLK_SYS_CTRL_SRC_VALUE_CLK_REF, 0, xosc_hz, xosc_hz);
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// CLK_RTC = XOSC / 256
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clock_configure(clk_rtc, 0, CLOCKS_CLK_RTC_CTRL_AUXSRC_VALUE_XOSC_CLKSRC, xosc_hz, xosc_hz / 256);
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// CLK_PERI = CLK_SYS
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clock_configure(clk_peri, 0, CLOCKS_CLK_PERI_CTRL_AUXSRC_VALUE_CLK_SYS, xosc_hz, xosc_hz);
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// Disable PLLs.
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pll_deinit(pll_sys);
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pll_deinit(pll_usb);
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// Disable ROSC.
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rosc_hw->ctrl = ROSC_CTRL_ENABLE_VALUE_DISABLE << ROSC_CTRL_ENABLE_LSB;
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if (n_args == 0) {
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xosc_dormant();
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} else {
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uint32_t sleep_en0 = clocks_hw->sleep_en0;
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uint32_t sleep_en1 = clocks_hw->sleep_en1;
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clocks_hw->sleep_en0 = CLOCKS_SLEEP_EN0_CLK_RTC_RTC_BITS;
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if (use_timer_alarm) {
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// Use timer alarm to wake.
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clocks_hw->sleep_en1 = CLOCKS_SLEEP_EN1_CLK_SYS_TIMER_BITS;
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timer_hw->alarm[3] = timer_hw->timerawl + delay_ms * 1000;
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} else {
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// TODO: Use RTC alarm to wake.
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clocks_hw->sleep_en1 = 0;
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}
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scb_hw->scr |= M0PLUS_SCR_SLEEPDEEP_BITS;
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__wfi();
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scb_hw->scr &= ~M0PLUS_SCR_SLEEPDEEP_BITS;
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clocks_hw->sleep_en0 = sleep_en0;
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clocks_hw->sleep_en1 = sleep_en1;
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}
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// Enable ROSC.
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rosc_hw->ctrl = ROSC_CTRL_ENABLE_VALUE_ENABLE << ROSC_CTRL_ENABLE_LSB;
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// Bring back all clocks.
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clocks_init();
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_lightsleep_obj, 0, 1, machine_lightsleep);
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STATIC mp_obj_t machine_deepsleep(size_t n_args, const mp_obj_t *args) {
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machine_lightsleep(n_args, args);
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return machine_reset();
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_deepsleep_obj, 0, 1, machine_deepsleep);
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STATIC mp_obj_t machine_disable_irq(void) {
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uint32_t state = MICROPY_BEGIN_ATOMIC_SECTION();
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return mp_obj_new_int(state);
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}
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MP_DEFINE_CONST_FUN_OBJ_0(machine_disable_irq_obj, machine_disable_irq);
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STATIC mp_obj_t machine_enable_irq(mp_obj_t state_in) {
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uint32_t state = mp_obj_get_int(state_in);
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MICROPY_END_ATOMIC_SECTION(state);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(machine_enable_irq_obj, machine_enable_irq);
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STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_umachine) },
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{ MP_ROM_QSTR(MP_QSTR_unique_id), MP_ROM_PTR(&machine_unique_id_obj) },
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{ MP_ROM_QSTR(MP_QSTR_soft_reset), MP_ROM_PTR(&machine_soft_reset_obj) },
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{ MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&machine_reset_obj) },
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{ MP_ROM_QSTR(MP_QSTR_reset_cause), MP_ROM_PTR(&machine_reset_cause_obj) },
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{ MP_ROM_QSTR(MP_QSTR_bootloader), MP_ROM_PTR(&machine_bootloader_obj) },
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{ MP_ROM_QSTR(MP_QSTR_freq), MP_ROM_PTR(&machine_freq_obj) },
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{ MP_ROM_QSTR(MP_QSTR_idle), MP_ROM_PTR(&machine_idle_obj) },
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{ MP_ROM_QSTR(MP_QSTR_lightsleep), MP_ROM_PTR(&machine_lightsleep_obj) },
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{ MP_ROM_QSTR(MP_QSTR_deepsleep), MP_ROM_PTR(&machine_deepsleep_obj) },
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{ MP_ROM_QSTR(MP_QSTR_disable_irq), MP_ROM_PTR(&machine_disable_irq_obj) },
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{ MP_ROM_QSTR(MP_QSTR_enable_irq), MP_ROM_PTR(&machine_enable_irq_obj) },
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#if MICROPY_PY_MACHINE_BITSTREAM
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{ MP_ROM_QSTR(MP_QSTR_bitstream), MP_ROM_PTR(&machine_bitstream_obj) },
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#endif
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{ MP_ROM_QSTR(MP_QSTR_time_pulse_us), MP_ROM_PTR(&machine_time_pulse_us_obj) },
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{ MP_ROM_QSTR(MP_QSTR_mem8), MP_ROM_PTR(&machine_mem8_obj) },
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{ MP_ROM_QSTR(MP_QSTR_mem16), MP_ROM_PTR(&machine_mem16_obj) },
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{ MP_ROM_QSTR(MP_QSTR_mem32), MP_ROM_PTR(&machine_mem32_obj) },
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{ MP_ROM_QSTR(MP_QSTR_ADC), MP_ROM_PTR(&machine_adc_type) },
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{ MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&machine_hw_i2c_type) },
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{ MP_ROM_QSTR(MP_QSTR_SoftI2C), MP_ROM_PTR(&mp_machine_soft_i2c_type) },
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{ MP_ROM_QSTR(MP_QSTR_I2S), MP_ROM_PTR(&machine_i2s_type) },
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{ MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&machine_pin_type) },
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{ MP_ROM_QSTR(MP_QSTR_PWM), MP_ROM_PTR(&machine_pwm_type) },
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{ MP_ROM_QSTR(MP_QSTR_RTC), MP_ROM_PTR(&machine_rtc_type) },
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{ MP_ROM_QSTR(MP_QSTR_Signal), MP_ROM_PTR(&machine_signal_type) },
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{ MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&machine_spi_type) },
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{ MP_ROM_QSTR(MP_QSTR_SoftSPI), MP_ROM_PTR(&mp_machine_soft_spi_type) },
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{ MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&machine_timer_type) },
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{ MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&machine_uart_type) },
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{ MP_ROM_QSTR(MP_QSTR_WDT), MP_ROM_PTR(&machine_wdt_type) },
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{ MP_ROM_QSTR(MP_QSTR_PWRON_RESET), MP_ROM_INT(RP2_RESET_PWRON) },
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{ MP_ROM_QSTR(MP_QSTR_WDT_RESET), MP_ROM_INT(RP2_RESET_WDT) },
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};
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STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);
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const mp_obj_module_t mp_module_machine = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t *)&machine_module_globals,
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};
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MP_REGISTER_MODULE(MP_QSTR_umachine, mp_module_machine);
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#endif // MICROPY_PY_MACHINE
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