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circuitpython/stmhal/help.c

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4.9 KiB

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 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 <stdio.h>
#include "py/nlr.h"
#include "py/obj.h"
STATIC const char *help_text =
"Welcome to MicroPython!\n"
"\n"
"For online help please visit http://micropython.org/help/.\n"
"\n"
"Quick overview of commands for the board:\n"
" pyb.info() -- print some general information\n"
" pyb.delay(n) -- wait for n milliseconds\n"
" pyb.millis() -- get number of milliseconds since hard reset\n"
" pyb.Switch() -- create a switch object\n"
" Switch methods: (), callback(f)\n"
" pyb.LED(n) -- create an LED object for LED n (n=1,2,3,4)\n"
" LED methods: on(), off(), toggle(), intensity(<n>)\n"
" pyb.Pin(pin) -- get a pin, eg pyb.Pin('X1')\n"
" pyb.Pin(pin, m, [p]) -- get a pin and configure it for IO mode m, pull mode p\n"
" Pin methods: init(..), value([v]), high(), low()\n"
" pyb.ExtInt(pin, m, p, callback) -- create an external interrupt object\n"
" pyb.ADC(pin) -- make an analog object from a pin\n"
" ADC methods: read(), read_timed(buf, freq)\n"
" pyb.DAC(port) -- make a DAC object\n"
" DAC methods: triangle(freq), write(n), write_timed(buf, freq)\n"
" pyb.RTC() -- make an RTC object; methods: datetime([val])\n"
" pyb.rng() -- get a 30-bit hardware random number\n"
" pyb.Servo(n) -- create Servo object for servo n (n=1,2,3,4)\n"
" Servo methods: calibration(..), angle([x, [t]]), speed([x, [t]])\n"
" pyb.Accel() -- create an Accelerometer object\n"
" Accelerometer methods: x(), y(), z(), tilt(), filtered_xyz()\n"
"\n"
"Pins are numbered X1-X12, X17-X22, Y1-Y12, or by their MCU name\n"
"Pin IO modes are: pyb.Pin.IN, pyb.Pin.OUT_PP, pyb.Pin.OUT_OD\n"
"Pin pull modes are: pyb.Pin.PULL_NONE, pyb.Pin.PULL_UP, pyb.Pin.PULL_DOWN\n"
"Additional serial bus objects: pyb.I2C(n), pyb.SPI(n), pyb.UART(n)\n"
"\n"
"Control commands:\n"
" CTRL-A -- on a blank line, enter raw REPL mode\n"
" CTRL-B -- on a blank line, enter normal REPL mode\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"
;
STATIC void pyb_help_print_info_about_object(mp_obj_t name_o, mp_obj_t value) {
printf(" ");
mp_obj_print(name_o, PRINT_STR);
printf(" -- ");
mp_obj_print(value, PRINT_STR);
printf("\n");
}
STATIC mp_obj_t pyb_help(uint n_args, const mp_obj_t *args) {
if (n_args == 0) {
// print a general help message
printf("%s", help_text);
} else {
// try to print something sensible about the given object
printf("object ");
mp_obj_print(args[0], PRINT_STR);
printf(" is of type %s\n", mp_obj_get_type_str(args[0]));
mp_map_t *map = NULL;
if (MP_OBJ_IS_TYPE(args[0], &mp_type_module)) {
map = mp_obj_dict_get_map(mp_obj_module_get_globals(args[0]));
} else {
mp_obj_type_t *type;
if (MP_OBJ_IS_TYPE(args[0], &mp_type_type)) {
type = args[0];
} else {
type = mp_obj_get_type(args[0]);
}
if (type->locals_dict != MP_OBJ_NULL && MP_OBJ_IS_TYPE(type->locals_dict, &mp_type_dict)) {
map = mp_obj_dict_get_map(type->locals_dict);
}
}
if (map != NULL) {
for (uint i = 0; i < map->alloc; i++) {
if (map->table[i].key != MP_OBJ_NULL) {
pyb_help_print_info_about_object(map->table[i].key, map->table[i].value);
}
}
}
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_help_obj, 0, 1, pyb_help);