micropython/ports/mimxrt/main.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Damien P. George
* Copyright (c) 2020 Jim Mussared
*
* 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/compile.h"
#include "py/runtime.h"
#include "py/gc.h"
#include "py/mperrno.h"
#include "py/stackctrl.h"
#include "shared/readline/readline.h"
#include "shared/runtime/gchelper.h"
#include "shared/runtime/pyexec.h"
#include "ticks.h"
#include "tusb.h"
#include "led.h"
#include "pendsv.h"
#include "modmachine.h"
#if MICROPY_PY_LWIP
#include "lwip/init.h"
#include "lwip/apps/mdns.h"
#endif
#include "systick.h"
#include "extmod/modnetwork.h"
extern uint8_t _sstack, _estack, _gc_heap_start, _gc_heap_end;
void board_init(void);
int main(void) {
board_init();
ticks_init();
tusb_init();
led_init();
pendsv_init();
mp_stack_set_top(&_estack);
mp_stack_set_limit(&_estack - &_sstack - 1024);
#if MICROPY_PY_LWIP
// lwIP doesn't allow to reinitialise itself by subsequent calls to this function
// because the system timeout list (next_timeout) is only ever reset by BSS clearing.
// So for now we only init the lwIP stack once on power-up.
lwip_init();
#if LWIP_MDNS_RESPONDER
mdns_resp_init();
#endif
systick_enable_dispatch(SYSTICK_DISPATCH_LWIP, mod_network_lwip_poll_wrapper);
#endif
for (;;) {
gc_init(&_gc_heap_start, &_gc_heap_end);
mp_init();
#if MICROPY_PY_NETWORK
mod_network_init();
#endif
// Initialise sub-systems.
readline_init0();
// Execute _boot.py to set up the filesystem.
pyexec_frozen_module("_boot.py");
// Execute user scripts.
int ret = pyexec_file_if_exists("boot.py");
if (ret & PYEXEC_FORCED_EXIT) {
goto soft_reset_exit;
}
// Do not execute main.py if boot.py failed
if (pyexec_mode_kind == PYEXEC_MODE_FRIENDLY_REPL && ret != 0) {
ret = pyexec_file_if_exists("main.py");
if (ret & PYEXEC_FORCED_EXIT) {
goto soft_reset_exit;
}
}
for (;;) {
if (pyexec_mode_kind == PYEXEC_MODE_RAW_REPL) {
if (pyexec_raw_repl() != 0) {
break;
}
} else {
if (pyexec_friendly_repl() != 0) {
break;
}
}
}
soft_reset_exit:
mp_printf(MP_PYTHON_PRINTER, "MPY: soft reboot\n");
machine_pin_irq_deinit();
#if MICROPY_PY_NETWORK
mod_network_deinit();
#endif
mimxrt: Support PWM using the FLEXPWM and QTMR modules. Frequency range 15Hz/18Hz to > 1 MHz, with decreasing resolution of the duty cycle. The basic API is supported as documentated, except that keyword parameters are accepted for both the instatiaton and the PWM.init() call. Extensions: support PWM for channel pairs. Channel pairs are declared by supplying 2-element tuples for the pins. The two channels of a pair must be the A/B channel of a FLEXPWM module. These form than a complementary pair. Additional supported keyword arguments: - center=value Defines the center position of a pulse within the pulse cycle. The align keyword is actually shortcut for center. - sync=True|False: If set to True, the channels will be synchronized to a submodule 0 channel, which has already to be enabled. - align=PWM.MIDDLE | PMW.BEGIN | PWM.END. It defines, whether synchronized channels are Center-Aligned or Edge-aligned. The channels must be either complementary a channel pair or a group of synchronized channels. It may as well be applied to a single channel, but withiout any benefit. - invert= 0..3. Controls ouput inversion of the pins. Bit 0 controls the first pin, bit 1 the second. - deadtime=time_ns time of complementary channels for delaying the rising slope. - xor=0|1|2 xor causes the output of channel A and B to be xored. If applied to a X channel, it shows the value oif A ^ B. If applied to an A or B channel, both channel show the xored signal for xor=1. For xor=2, the xored signal is split between channels A and B. See also the Reference Manual, chapter about double pulses. The behavior of xor=2 can also be achieved using the center method for locating a pulse within a clock period. The output is enabled for board pins only. CPU pins may still be used for FLEXPWM, e.g. as sync source, but the signal will not be routed to the output. That applies only to FLEXPWM pins. The use of QTMR pins which are not board pins will be rejected. As part of this commit, the _WFE() statement is removed from ticks_delay_us64() to prevent PWM glitching during calls to sleep().
2021-07-26 11:48:25 +01:00
machine_pwm_deinit_all();
gc_sweep_all();
mp_deinit();
}
return 0;
}
void gc_collect(void) {
gc_collect_start();
gc_helper_collect_regs_and_stack();
gc_collect_end();
}
void nlr_jump_fail(void *val) {
for (;;) {
}
}
#ifndef NDEBUG
void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) {
mp_printf(MP_PYTHON_PRINTER, "Assertion '%s' failed, at file %s:%d\n", expr, file, line);
for (;;) {
}
}
#endif
const char mimxrt_help_text[] =
"Welcome to MicroPython!\n"
"\n"
"For online help please visit https://micropython.org/help/.\n"
"\n"
"For access to the hardware use the 'machine' module. \n"
"\n"
"Quick overview of some objects:\n"
" machine.Pin(pin) -- get a pin, eg machine.Pin(0)\n"
" machine.Pin(pin, m, [p]) -- get a pin and configure it for IO mode m, pull mode p\n"
" methods: init(..), value([v]), high(), low())\n"
"\n"
" Pins are numbered board specific, either 0-n, or 'D0'-'Dn', or 'A0' - 'An',\n"
" according to the boards's pinout sheet.\n"
" Pin IO modes are: Pin.IN, Pin.OUT, Pin.OPEN_DRAIN\n"
" Pin pull modes are: Pin.PULL_UP, Pin.PULL_UP_47K, Pin.PULL_UP_22K, Pin.PULL_DOWN, Pin.PULL_HOLD\n"
" machine.ADC(pin) -- make an analog object from a pin\n"
" methods: read_u16()\n"
" machine.UART(id, baudrate=115200) -- create an UART object (id=1 - 8, board-specific)\n"
" methods: init(), write(buf), any()\n"
" buf=read(n), readinto(buf), buf=readline()\n"
" The RX and TX pins are fixed and board-specific.\n"
" machine.SoftI2C() -- create a Soft I2C object\n"
" machine.I2C(id) -- create a HW I2C object\n"
" methods: readfrom(addr, buf, stop=True), writeto(addr, buf, stop=True)\n"
" readfrom_mem(addr, memaddr, arg), writeto_mem(addr, memaddr, arg)\n"
" SoftI2C allows to use any pin for sda and scl, HW I2C id's and pins are fixed\n"
" machine.SoftSPI(baudrate=1000000) -- create a Soft SPI object\n"
" machine.SPI(id, baudrate=1000000) -- create a HW SPI object\n"
" methods: read(nbytes, write=0x00), write(buf), write_readinto(wr_buf, rd_buf)\n"
" SoftSPI allows to use any pin for SPI, HW SPI id's and pins are fixed\n"
" machine.Timer(id, freq, callback) -- create a hardware timer object (id=0,1,2)\n"
" eg: machine.Timer(freq=1, callback=lambda t:print(t))\n"
" machine.RTC() -- create a Real Time Clock object\n"
" methods: init(), datetime([dateime_tuple]), now()\n"
" machine.PWM(pin, freq, duty_u16[, kw_opts]) -- create a PWM object\n"
" methods: init(), duty_u16([value]), duty_ns([value]), freq([value])\n"
"\n"
"Useful control commands:\n"
" CTRL-C -- interrupt a running program\n"
" CTRL-D -- on a blank line, do a soft reset of the board\n"
" CTRL-E -- on a blank line, enter paste mode\n"
"\n"
"For further help on a specific object, type help(obj)\n"
"For a list of available modules, type help('modules')\n"
;