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