227 lines
6.7 KiB
C
227 lines
6.7 KiB
C
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <stm32f4xx_hal.h>
|
|
|
|
#include "misc.h"
|
|
#include "mpconfig.h"
|
|
#include "qstr.h"
|
|
#include "obj.h"
|
|
#include "runtime.h"
|
|
#include "nlr.h"
|
|
|
|
#include "pin.h"
|
|
|
|
// Usage Model:
|
|
//
|
|
// All Board Pins are predefined as pyb.Pin.board.Name
|
|
//
|
|
// x1_pin = pyb.Pin.board.X1
|
|
//
|
|
// g = pyb.gpio(pyb.Pin.board.X1, 0)
|
|
//
|
|
// CPU pins which correspond to the board pins are available
|
|
// as pyb.cpu.Name. For the CPU pins, the names are the port letter
|
|
// followed by the pin number. On the PYBV4, pyb.Pin.board.X1 and
|
|
// pyb.Pin.cpu.B6 are the same pin.
|
|
//
|
|
// You can also use strings:
|
|
//
|
|
// g = pyb.gpio('X1', 0)
|
|
//
|
|
// Users can add their own names:
|
|
//
|
|
// pyb.Pin("LeftMotorDir", pyb.Pin.cpu.C12)
|
|
// g = pyb.gpio("LeftMotorDir", 0)
|
|
//
|
|
// and can query mappings
|
|
//
|
|
// pin = pyb.Pin("LeftMotorDir");
|
|
//
|
|
// Users can also add their own mapping function:
|
|
//
|
|
// def MyMapper(pin_name):
|
|
// if pin_name == "LeftMotorDir":
|
|
// return pyb.Pin.cpu.A0
|
|
//
|
|
// pyb.Pin.mapper(MyMapper)
|
|
//
|
|
// So, if you were to call: pyb.gpio("LeftMotorDir", 0)
|
|
// then "LeftMotorDir" is passed directly to the mapper function.
|
|
//
|
|
// To summarize, the following order determines how things get mapped into
|
|
// an ordinal pin number:
|
|
//
|
|
// 1 - Directly specify a pin object
|
|
// 2 - User supplied mapping function
|
|
// 3 - User supplied mapping (object must be usable as a dictionary key)
|
|
// 4 - Supply a string which matches a board pin
|
|
// 5 - Supply a string which matches a CPU port/pin
|
|
//
|
|
// You can set pyb.Pin.debug(True) to get some debug information about
|
|
// how a particular object gets mapped to a pin.
|
|
|
|
static void pin_map_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
(void)self_in;
|
|
print(env, "<PinMap>");
|
|
}
|
|
|
|
static mp_obj_t pin_map_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args) {
|
|
pin_map_obj_t *self = self_in;
|
|
mp_check_nargs(n_args, 1, 2, n_kw, false);
|
|
|
|
if (n_args > 1) {
|
|
if (!self->map_dict) {
|
|
self->map_dict = mp_obj_new_dict(1);
|
|
}
|
|
mp_obj_dict_store(self->map_dict, args[0], args[1]);
|
|
return mp_const_none;
|
|
}
|
|
|
|
// Run an argument through the mapper and return the result.
|
|
return (mp_obj_t)pin_map_user_obj(args[0]);
|
|
}
|
|
|
|
static mp_obj_t pin_map_obj_mapper(uint n_args, mp_obj_t *args) {
|
|
pin_map_obj_t *self = args[0];
|
|
if (n_args > 1) {
|
|
self->mapper = args[1];
|
|
return mp_const_none;
|
|
}
|
|
return self->mapper;
|
|
}
|
|
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pin_map_obj_mapper_obj, 1, 2, pin_map_obj_mapper);
|
|
|
|
static mp_obj_t pin_map_obj_debug(uint n_args, mp_obj_t *args) {
|
|
pin_map_obj_t *self = args[0];
|
|
if (n_args > 1) {
|
|
self->debug = mp_obj_is_true(args[1]);
|
|
return mp_const_none;
|
|
}
|
|
return MP_BOOL(self->debug);
|
|
}
|
|
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pin_map_obj_debug_obj, 1, 2, pin_map_obj_debug);
|
|
|
|
static void pin_map_load_attr(mp_obj_t self_in, qstr attr_qstr, mp_obj_t *dest) {
|
|
(void)self_in;
|
|
const char *attr = qstr_str(attr_qstr);
|
|
|
|
if (strcmp(attr, "mapper") == 0) {
|
|
dest[0] = (mp_obj_t)&pin_map_obj_mapper_obj;
|
|
dest[1] = self_in;
|
|
}
|
|
if (strcmp(attr, "debug") == 0) {
|
|
dest[0] = (mp_obj_t)&pin_map_obj_debug_obj;
|
|
dest[1] = self_in;
|
|
}
|
|
if (strcmp(attr, pin_board_pins_obj.name) == 0) {
|
|
dest[0] = (mp_obj_t)&pin_board_pins_obj;
|
|
dest[1] = MP_OBJ_NULL;
|
|
}
|
|
if (strcmp(attr, pin_cpu_pins_obj.name) == 0) {
|
|
dest[0] = (mp_obj_t)&pin_cpu_pins_obj;
|
|
dest[1] = MP_OBJ_NULL;
|
|
}
|
|
}
|
|
|
|
static const mp_obj_type_t pin_map_obj_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_PinMap,
|
|
.print = pin_map_obj_print,
|
|
.call = pin_map_call,
|
|
.load_attr = pin_map_load_attr,
|
|
};
|
|
|
|
static const pin_map_obj_t pin_map_obj_init = {
|
|
{ &pin_map_obj_type },
|
|
.mapper = MP_OBJ_NULL,
|
|
.map_dict = MP_OBJ_NULL,
|
|
.debug = false,
|
|
};
|
|
|
|
pin_map_obj_t pin_map_obj;
|
|
|
|
void pin_map_init(void) {
|
|
pin_map_obj = pin_map_obj_init;
|
|
}
|
|
|
|
// C API used to convert a user-supplied pin name into an ordinal pin number.
|
|
const pin_obj_t *pin_map_user_obj(mp_obj_t user_obj) {
|
|
const pin_obj_t *pin_obj;
|
|
|
|
// If a pin was provided, then use it
|
|
if (MP_OBJ_IS_TYPE(user_obj, &pin_obj_type)) {
|
|
pin_obj = user_obj;
|
|
if (pin_map_obj.debug) {
|
|
printf("Pin map passed pin ");
|
|
mp_obj_print((mp_obj_t)pin_obj, PRINT_STR);
|
|
printf("\n");
|
|
}
|
|
return pin_obj;
|
|
}
|
|
|
|
if (pin_map_obj.mapper) {
|
|
pin_obj = mp_call_function_1(pin_map_obj.mapper, user_obj);
|
|
if (pin_obj != mp_const_none) {
|
|
if (!MP_OBJ_IS_TYPE(pin_obj, &pin_obj_type)) {
|
|
nlr_jump(mp_obj_new_exception_msg(&mp_type_ValueError, "Pin.mapper didn't return a Pin object"));
|
|
}
|
|
if (pin_map_obj.debug) {
|
|
printf("Pin.mapper maps ");
|
|
mp_obj_print(user_obj, PRINT_REPR);
|
|
printf(" to ");
|
|
mp_obj_print((mp_obj_t)pin_obj, PRINT_STR);
|
|
printf("\n");
|
|
}
|
|
return pin_obj;
|
|
}
|
|
// The pin mapping function returned mp_const_none, fall through to
|
|
// other lookup methods.
|
|
}
|
|
|
|
if (pin_map_obj.map_dict) {
|
|
mp_map_t *pin_map_map = mp_obj_dict_get_map(pin_map_obj.map_dict);
|
|
mp_map_elem_t *elem = mp_map_lookup(pin_map_map, user_obj, MP_MAP_LOOKUP);
|
|
if (elem != NULL && elem->value != NULL) {
|
|
pin_obj = elem->value;
|
|
if (pin_map_obj.debug) {
|
|
printf("Pin.map_dict maps ");
|
|
mp_obj_print(user_obj, PRINT_REPR);
|
|
printf(" to ");
|
|
mp_obj_print((mp_obj_t)pin_obj, PRINT_STR);
|
|
printf("\n");
|
|
}
|
|
return pin_obj;
|
|
}
|
|
}
|
|
|
|
// See if the pin name matches a board pin
|
|
const char *pin_name = mp_obj_str_get_str(user_obj);
|
|
pin_obj = pin_find_named_pin(pin_board_pins, pin_name);
|
|
if (pin_obj) {
|
|
if (pin_map_obj.debug) {
|
|
printf("Pin.board maps ");
|
|
mp_obj_print(user_obj, PRINT_REPR);
|
|
printf(" to ");
|
|
mp_obj_print((mp_obj_t)pin_obj, PRINT_STR);
|
|
printf("\n");
|
|
}
|
|
return pin_obj;
|
|
}
|
|
|
|
// See if the pin name matches a cpu pin
|
|
pin_obj = pin_find_named_pin(pin_cpu_pins, pin_name);
|
|
if (pin_obj) {
|
|
if (pin_map_obj.debug) {
|
|
printf("Pin.cpu maps ");
|
|
mp_obj_print(user_obj, PRINT_REPR);
|
|
printf(" to ");
|
|
mp_obj_print((mp_obj_t)pin_obj, PRINT_STR);
|
|
printf("\n");
|
|
}
|
|
return pin_obj;
|
|
}
|
|
|
|
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "pin '%s' not a valid pin identifier", pin_name));
|
|
}
|