288 lines
12 KiB
C
288 lines
12 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2020 Philipp Ebensberger
|
|
*
|
|
* 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 <stdint.h>
|
|
|
|
#include "fsl_gpio.h"
|
|
#include "fsl_iomuxc.h"
|
|
|
|
#include "py/runtime.h"
|
|
#include "py/mphal.h"
|
|
#include "pin.h"
|
|
#include "mphalport.h"
|
|
|
|
// Local functions
|
|
STATIC mp_obj_t machine_pin_obj_init_helper(const machine_pin_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args);
|
|
|
|
// Class Methods
|
|
STATIC void machine_pin_obj_print(const mp_print_t *print, mp_obj_t o, mp_print_kind_t kind);
|
|
STATIC mp_obj_t machine_pin_obj_call(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args);
|
|
mp_obj_t mp_pin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args);
|
|
|
|
// Instance Methods
|
|
STATIC mp_obj_t machine_pin_off(mp_obj_t self_in);
|
|
STATIC mp_obj_t machine_pin_on(mp_obj_t self_in);
|
|
STATIC mp_obj_t machine_pin_value(size_t n_args, const mp_obj_t *args);
|
|
STATIC mp_obj_t machine_pin_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args);
|
|
|
|
// Local data
|
|
enum {
|
|
PIN_INIT_ARG_MODE = 0,
|
|
PIN_INIT_ARG_PULL,
|
|
PIN_INIT_ARG_VALUE,
|
|
PIN_INIT_ARG_DRIVE,
|
|
};
|
|
|
|
// Pin mapping dictionaries
|
|
const mp_obj_type_t machine_pin_cpu_pins_obj_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_cpu,
|
|
.locals_dict = (mp_obj_t)&machine_pin_cpu_pins_locals_dict,
|
|
};
|
|
|
|
const mp_obj_type_t machine_pin_board_pins_obj_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_board,
|
|
.locals_dict = (mp_obj_t)&machine_pin_board_pins_locals_dict,
|
|
};
|
|
|
|
// Simplified mode setting used by the extmod modules
|
|
void machine_pin_set_mode(const machine_pin_obj_t *self, uint8_t mode) {
|
|
gpio_pin_config_t pin_config = {kGPIO_DigitalInput, 1, kGPIO_NoIntmode};
|
|
|
|
pin_config.direction = (mode == PIN_MODE_IN ? kGPIO_DigitalInput : kGPIO_DigitalOutput);
|
|
GPIO_PinInit(self->gpio, self->pin, &pin_config);
|
|
if (mode == PIN_MODE_OPEN_DRAIN) {
|
|
uint32_t pad_config = *(uint32_t *)self->configRegister;
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_ODE(0b1) | IOMUXC_SW_PAD_CTL_PAD_DSE(0b110);
|
|
IOMUXC_SetPinMux(self->muxRegister, PIN_AF_MODE_ALT5, 0, 0, self->configRegister, 1U); // Software Input On Field: Input Path is determined by functionality
|
|
IOMUXC_SetPinConfig(self->muxRegister, PIN_AF_MODE_ALT5, 0, 0, self->configRegister, pad_config);
|
|
}
|
|
}
|
|
|
|
STATIC mp_obj_t machine_pin_obj_call(mp_obj_t self_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
|
|
mp_arg_check_num(n_args, n_kw, 0, 1, false);
|
|
machine_pin_obj_t *self = self_in;
|
|
|
|
if (n_args == 0) {
|
|
return MP_OBJ_NEW_SMALL_INT(mp_hal_pin_read(self));
|
|
} else {
|
|
mp_hal_pin_write(self, mp_obj_is_true(args[0]));
|
|
return mp_const_none;
|
|
}
|
|
}
|
|
|
|
STATIC mp_obj_t machine_pin_obj_init_helper(const machine_pin_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
|
|
static const mp_arg_t allowed_args[] = {
|
|
[PIN_INIT_ARG_MODE] { MP_QSTR_mode, MP_ARG_REQUIRED | MP_ARG_INT },
|
|
[PIN_INIT_ARG_PULL] { MP_QSTR_pull, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE}},
|
|
[PIN_INIT_ARG_VALUE] { MP_QSTR_value, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL}},
|
|
[PIN_INIT_ARG_DRIVE] { MP_QSTR_drive, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = PIN_DRIVE_POWER_3}},
|
|
// TODO: Implement additional arguments
|
|
/*
|
|
{ MP_QSTR_af, MP_ARG_INT, {.u_int = -1}}, // legacy
|
|
{ MP_QSTR_alt, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1}},*/
|
|
};
|
|
|
|
// Parse args
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
|
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
|
|
|
// Get io mode
|
|
uint mode = args[PIN_INIT_ARG_MODE].u_int;
|
|
if (!IS_GPIO_MODE(mode)) {
|
|
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("invalid pin mode: %d"), mode);
|
|
}
|
|
|
|
// Handle configuration for GPIO
|
|
if ((mode == PIN_MODE_IN) || (mode == PIN_MODE_OUT) || (mode == PIN_MODE_OPEN_DRAIN)) {
|
|
gpio_pin_config_t pin_config;
|
|
const machine_pin_af_obj_t *af_obj;
|
|
uint32_t pad_config = 0UL;
|
|
uint8_t pull = PIN_PULL_DISABLED;
|
|
|
|
// Generate pin configuration
|
|
if ((args[PIN_INIT_ARG_VALUE].u_obj != MP_OBJ_NULL) && (mp_obj_is_true(args[PIN_INIT_ARG_VALUE].u_obj))) {
|
|
pin_config.outputLogic = 1U;
|
|
} else {
|
|
pin_config.outputLogic = 0U;
|
|
}
|
|
pin_config.direction = mode == PIN_MODE_IN ? kGPIO_DigitalInput : kGPIO_DigitalOutput;
|
|
pin_config.interruptMode = kGPIO_NoIntmode;
|
|
|
|
af_obj = pin_find_af(self, PIN_AF_MODE_ALT5); // GPIO is always ALT5
|
|
if (af_obj == NULL) {
|
|
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("requested AF %d not available for pin %d"), PIN_AF_MODE_ALT5, mode);
|
|
}
|
|
|
|
// Generate pad configuration
|
|
if (args[PIN_INIT_ARG_PULL].u_obj != mp_const_none) {
|
|
pull = (uint8_t)mp_obj_get_int(args[PIN_INIT_ARG_PULL].u_obj);
|
|
}
|
|
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_SRE(0U); // Slow Slew Rate
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_SPEED(0b01); // medium(100MHz)
|
|
|
|
if (mode == PIN_MODE_OPEN_DRAIN) {
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_ODE(0b1); // Open Drain Enabled
|
|
} else {
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_ODE(0b0); // Open Drain Disabled
|
|
}
|
|
|
|
if (pull == PIN_PULL_DISABLED) {
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_PKE(0); // Pull/Keeper Disabled
|
|
} else if (pull == PIN_PULL_HOLD) {
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_PKE(1) | // Pull/Keeper Enabled
|
|
IOMUXC_SW_PAD_CTL_PAD_PUE(0); // Keeper selected
|
|
} else {
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_PKE(1) | // Pull/Keeper Enabled
|
|
IOMUXC_SW_PAD_CTL_PAD_PUE(1) | // Pull selected
|
|
IOMUXC_SW_PAD_CTL_PAD_PUS(pull);
|
|
}
|
|
|
|
if (mode == PIN_MODE_IN) {
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_DSE(0b000) | // output driver disabled
|
|
IOMUXC_SW_PAD_CTL_PAD_HYS(1U); // Hysteresis enabled
|
|
} else {
|
|
uint drive = args[PIN_INIT_ARG_DRIVE].u_int;
|
|
if (!IS_GPIO_DRIVE(drive)) {
|
|
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("invalid drive strength: %d"), drive);
|
|
}
|
|
|
|
pad_config |= IOMUXC_SW_PAD_CTL_PAD_DSE(drive) |
|
|
IOMUXC_SW_PAD_CTL_PAD_HYS(0U); // Hysteresis disabled
|
|
}
|
|
|
|
// Configure PAD as GPIO
|
|
IOMUXC_SetPinMux(self->muxRegister, af_obj->af_mode, 0, 0, self->configRegister, 1U); // Software Input On Field: Input Path is determined by functionality
|
|
IOMUXC_SetPinConfig(self->muxRegister, af_obj->af_mode, 0, 0, self->configRegister, pad_config);
|
|
GPIO_PinInit(self->gpio, self->pin, &pin_config);
|
|
}
|
|
|
|
return mp_const_none;
|
|
}
|
|
|
|
STATIC void machine_pin_obj_print(const mp_print_t *print, mp_obj_t o, mp_print_kind_t kind) {
|
|
(void)kind;
|
|
const machine_pin_obj_t *self = MP_OBJ_TO_PTR(o);
|
|
mp_printf(print, "Pin(%s)", qstr_str(self->name));
|
|
}
|
|
|
|
// pin(id, mode, pull, ...)
|
|
mp_obj_t mp_pin_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
|
mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
|
|
|
|
const machine_pin_obj_t *pin = pin_find(args[0]);
|
|
|
|
if (n_args > 1 || n_kw > 0) {
|
|
// pin mode given, so configure this GPIO
|
|
mp_map_t kw_args;
|
|
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
|
|
machine_pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args);
|
|
}
|
|
|
|
return (mp_obj_t)pin;
|
|
}
|
|
|
|
// pin.off()
|
|
STATIC mp_obj_t machine_pin_off(mp_obj_t self_in) {
|
|
machine_pin_obj_t *self = self_in;
|
|
mp_hal_pin_low(self);
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_pin_off_obj, machine_pin_off);
|
|
|
|
// pin.on()
|
|
STATIC mp_obj_t machine_pin_on(mp_obj_t self_in) {
|
|
machine_pin_obj_t *self = self_in;
|
|
mp_hal_pin_high(self);
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_pin_on_obj, machine_pin_on);
|
|
|
|
// pin.value([value])
|
|
STATIC mp_obj_t machine_pin_value(size_t n_args, const mp_obj_t *args) {
|
|
return machine_pin_obj_call(args[0], (n_args - 1), 0, args + 1);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_pin_value_obj, 1, 2, machine_pin_value);
|
|
|
|
// pin.init(mode, pull, [kwargs])
|
|
STATIC mp_obj_t machine_pin_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
|
|
return machine_pin_obj_init_helper(args[0], n_args - 1, args + 1, kw_args);
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_KW(machine_pin_init_obj, 1, machine_pin_init);
|
|
|
|
STATIC const mp_rom_map_elem_t machine_pin_locals_dict_table[] = {
|
|
// instance methods
|
|
{ MP_ROM_QSTR(MP_QSTR_off), MP_ROM_PTR(&machine_pin_off_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_on), MP_ROM_PTR(&machine_pin_on_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_low), MP_ROM_PTR(&machine_pin_off_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_high), MP_ROM_PTR(&machine_pin_on_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&machine_pin_value_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_pin_init_obj) },
|
|
// class attributes
|
|
{ MP_ROM_QSTR(MP_QSTR_board), MP_ROM_PTR(&machine_pin_board_pins_obj_type) },
|
|
{ MP_ROM_QSTR(MP_QSTR_cpu), MP_ROM_PTR(&machine_pin_cpu_pins_obj_type) },
|
|
// class constants
|
|
{ MP_ROM_QSTR(MP_QSTR_IN), MP_ROM_INT(PIN_MODE_IN) },
|
|
{ MP_ROM_QSTR(MP_QSTR_OUT), MP_ROM_INT(PIN_MODE_OUT) },
|
|
{ MP_ROM_QSTR(MP_QSTR_OPEN_DRAIN), MP_ROM_INT(PIN_MODE_OPEN_DRAIN) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_PULL_UP), MP_ROM_INT(PIN_PULL_UP_100K) },
|
|
{ MP_ROM_QSTR(MP_QSTR_PULL_UP_47K), MP_ROM_INT(PIN_PULL_UP_47K) },
|
|
{ MP_ROM_QSTR(MP_QSTR_PULL_UP_22K), MP_ROM_INT(PIN_PULL_UP_22K) },
|
|
{ MP_ROM_QSTR(MP_QSTR_PULL_DOWN), MP_ROM_INT(PIN_PULL_DOWN_100K) },
|
|
{ MP_ROM_QSTR(MP_QSTR_PULL_HOLD), MP_ROM_INT(PIN_PULL_HOLD) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_DRIVER_OFF), MP_ROM_INT(PIN_DRIVE_OFF) },
|
|
{ MP_ROM_QSTR(MP_QSTR_POWER_0), MP_ROM_INT(PIN_DRIVE_POWER_0) }, // R0 (150 Ohm @3.3V / 260 Ohm @ 1.8V)
|
|
{ MP_ROM_QSTR(MP_QSTR_POWER_1), MP_ROM_INT(PIN_DRIVE_POWER_1) }, // R0/2
|
|
{ MP_ROM_QSTR(MP_QSTR_POWER_2), MP_ROM_INT(PIN_DRIVE_POWER_2) }, // R0/3
|
|
{ MP_ROM_QSTR(MP_QSTR_POWER_3), MP_ROM_INT(PIN_DRIVE_POWER_3) }, // R0/4
|
|
{ MP_ROM_QSTR(MP_QSTR_POWER_4), MP_ROM_INT(PIN_DRIVE_POWER_4) }, // R0/5
|
|
{ MP_ROM_QSTR(MP_QSTR_POWER_5), MP_ROM_INT(PIN_DRIVE_POWER_5) }, // R0/6
|
|
{ MP_ROM_QSTR(MP_QSTR_POWER_6), MP_ROM_INT(PIN_DRIVE_POWER_6) }, // R0/7
|
|
|
|
};
|
|
STATIC MP_DEFINE_CONST_DICT(machine_pin_locals_dict, machine_pin_locals_dict_table);
|
|
|
|
const mp_obj_type_t machine_pin_type = {
|
|
{&mp_type_type},
|
|
.name = MP_QSTR_Pin,
|
|
.print = machine_pin_obj_print,
|
|
.call = machine_pin_obj_call,
|
|
.make_new = mp_pin_make_new,
|
|
.locals_dict = (mp_obj_dict_t *)&machine_pin_locals_dict,
|
|
};
|
|
|
|
// FIXME: Create actual pin_af type!!!
|
|
const mp_obj_type_t machine_pin_af_type = {
|
|
{&mp_type_type},
|
|
.name = MP_QSTR_PinAF,
|
|
.print = machine_pin_obj_print,
|
|
.make_new = mp_pin_make_new,
|
|
.locals_dict = (mp_obj_dict_t *)&machine_pin_locals_dict,
|
|
};
|