esp8266/modpybpin.c - lite/micropython - Linaro Git Browser

 /*
  * This file is part of the Micro Python project, http://micropython.org/
  *
  * The MIT License (MIT)
  *
  * Copyright (c) 2013, 2014, 2015 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 <stdint.h>
 #include <string.h>

 #include "c_types.h"
 #include "user_interface.h"
 #include "gpio.h"

 #include "py/nlr.h"
 #include "py/runtime.h"
 #include "modpyb.h"

 #define GPIO_MODE_INPUT (0)
 #define GPIO_MODE_OUTPUT (1)
 #define GPIO_MODE_OPEN_DRAIN (2) // synthesised
 #define GPIO_PULL_NONE (0)
 #define GPIO_PULL_UP (1)
 // Removed in SDK 1.1.0
 //#define GPIO_PULL_DOWN (2)

 STATIC const pyb_pin_obj_t pyb_pin_obj[] = {
     {{&pyb_pin_type}, 0, 0, PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0},
     {{&pyb_pin_type}, 1, 1, PERIPHS_IO_MUX_U0TXD_U, FUNC_GPIO1},
     {{&pyb_pin_type}, 2, 2, PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2},
     {{&pyb_pin_type}, 3, 3, PERIPHS_IO_MUX_U0RXD_U, FUNC_GPIO3},
     {{&pyb_pin_type}, 4, 4, PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4},
     {{&pyb_pin_type}, 5, 5, PERIPHS_IO_MUX_GPIO5_U, FUNC_GPIO5},
     {{&pyb_pin_type}, 9, 9, PERIPHS_IO_MUX_SD_DATA2_U, FUNC_GPIO9},
     {{&pyb_pin_type}, 10, 10, PERIPHS_IO_MUX_SD_DATA3_U, FUNC_GPIO10},
     {{&pyb_pin_type}, 12, 12, PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12},
     {{&pyb_pin_type}, 13, 13, PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13},
     {{&pyb_pin_type}, 14, 14, PERIPHS_IO_MUX_MTMS_U, FUNC_GPIO14},
     {{&pyb_pin_type}, 15, 15, PERIPHS_IO_MUX_MTDO_U, FUNC_GPIO15},
     // GPIO16 is special, belongs to different register set, and
     // otherwise handled specially.
     {{&pyb_pin_type}, 16, 16, -1, -1},
 };

 STATIC uint8_t pin_mode[16 + 1];

 pyb_pin_obj_t *mp_obj_get_pin_obj(mp_obj_t pin_in) {
     if (mp_obj_get_type(pin_in) != &pyb_pin_type) {
         nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "expecting a pin"));
     }
     pyb_pin_obj_t *self = pin_in;
     return self;
 }

 uint mp_obj_get_pin(mp_obj_t pin_in) {
     return mp_obj_get_pin_obj(pin_in)->phys_port;
 }

 int pin_get(uint pin) {
     if (pin == 16) {
         return READ_PERI_REG(RTC_GPIO_IN_DATA) & 1;
     }
     return GPIO_INPUT_GET(pin);
 }

 void pin_set(uint pin, int value) {
     if (pin == 16) {
         int out_en = (pin_mode[pin] == GPIO_MODE_OUTPUT);
         WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | 1);
         WRITE_PERI_REG(RTC_GPIO_CONF, READ_PERI_REG(RTC_GPIO_CONF) & ~1);
         WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & ~1) | out_en);
         WRITE_PERI_REG(RTC_GPIO_OUT, (READ_PERI_REG(RTC_GPIO_OUT) & ~1) | value);
         return;
     }

     uint32_t enable = 0;
     uint32_t disable = 0;
     switch (pin_mode[pin]) {
         case GPIO_MODE_INPUT:
             value = -1;
             disable = 1;
             break;

         case GPIO_MODE_OUTPUT:
             enable = 1;
             break;

         case GPIO_MODE_OPEN_DRAIN:
             if (value == -1) {
                 return;
             } else if (value == 0) {
                 enable = 1;
             } else {
                 value = -1;
                 disable = 1;
             }
             break;
     }

     enable <<= pin;
     disable <<= pin;
     if (value == -1) {
         gpio_output_set(0, 0, enable, disable);
     } else {
         gpio_output_set(value << pin, (1 - value) << pin, enable, disable);
     }
 }

 STATIC void pyb_pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
     pyb_pin_obj_t *self = self_in;

     // pin name
     mp_printf(print, "Pin(%u)", self->pin_id);
 }

 // pin.init(mode, pull=Pin.PULL_NONE, af=-1)
 STATIC mp_obj_t pyb_pin_obj_init_helper(pyb_pin_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     static const mp_arg_t allowed_args[] = {
         { MP_QSTR_mode, MP_ARG_REQUIRED | MP_ARG_INT },
         { MP_QSTR_pull, MP_ARG_INT, {.u_int = GPIO_PULL_NONE}},
         { MP_QSTR_value, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL}},
     };

     // parse args
     struct {
         mp_arg_val_t mode, pull, value;
     } args;
     mp_arg_parse_all(n_args, pos_args, kw_args,
         MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t*)&args);

     // get io mode
     uint mode = args.mode.u_int;

     // get pull mode
     uint pull = args.pull.u_int;

     // get initial value
     int value;
     if (args.value.u_obj == MP_OBJ_NULL) {
         value = -1;
     } else {
         value = mp_obj_is_true(args.value.u_obj);
     }

     // save the mode
     pin_mode[self->phys_port] = mode;

     // configure the GPIO as requested
     if (self->phys_port == 16) {
         // TODO: Set pull up/pull down
     } else {
         PIN_FUNC_SELECT(self->periph, self->func);
         #if 0
         // Removed in SDK 1.1.0
         if ((pull & GPIO_PULL_DOWN) == 0) {
             PIN_PULLDWN_DIS(self->periph);
         }
         #endif
         if ((pull & GPIO_PULL_UP) == 0) {
             PIN_PULLUP_DIS(self->periph);
         }
         #if 0
         if ((pull & GPIO_PULL_DOWN) != 0) {
             PIN_PULLDWN_EN(self->periph);
         }
         #endif
         if ((pull & GPIO_PULL_UP) != 0) {
             PIN_PULLUP_EN(self->periph);
         }
     }

     pin_set(self->phys_port, value);

     return mp_const_none;
 }

 // constructor(id, ...)
 STATIC mp_obj_t pyb_pin_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
     mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);

     // Run an argument through the mapper and return the result.
     int wanted_pin = mp_obj_get_int(args[0]);
     pyb_pin_obj_t *pin = NULL;
     for (int i = 0; i < MP_ARRAY_SIZE(pyb_pin_obj); i++) {
         if (pyb_pin_obj[i].pin_id == wanted_pin) {
             pin = (pyb_pin_obj_t*)&pyb_pin_obj[i];
             break;
         }
     }
     if (pin == NULL) {
         nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "invalid pin"));
     }

     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);
         pyb_pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args);
     }

     return (mp_obj_t)pin;
 }

 // fast method for getting/setting pin value
 STATIC mp_obj_t pyb_pin_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);
     pyb_pin_obj_t *self = self_in;
     if (n_args == 0) {
         // get pin
         return MP_OBJ_NEW_SMALL_INT(GPIO_INPUT_GET(self->phys_port));
     } else {
         // set pin
         pin_set(self->phys_port, mp_obj_is_true(args[0]));
         return mp_const_none;
     }
 }

 // pin.init(mode, pull)
 STATIC mp_obj_t pyb_pin_obj_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
     return pyb_pin_obj_init_helper(args[0], n_args - 1, args + 1, kw_args);
 }
 MP_DEFINE_CONST_FUN_OBJ_KW(pyb_pin_init_obj, 1, pyb_pin_obj_init);

 // pin.value([value])
 STATIC mp_obj_t pyb_pin_value(mp_uint_t n_args, const mp_obj_t *args) {
     return pyb_pin_call(args[0], n_args - 1, 0, args + 1);
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_pin_value_obj, 1, 2, pyb_pin_value);

 // pin.low()
 STATIC mp_obj_t pyb_pin_low(mp_obj_t self_in) {
     pyb_pin_obj_t *self = self_in;
     pin_set(self->phys_port, 0);
     return mp_const_none;
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_low_obj, pyb_pin_low);

 // pin.high()
 STATIC mp_obj_t pyb_pin_high(mp_obj_t self_in) {
     pyb_pin_obj_t *self = self_in;
     pin_set(self->phys_port, 1);
     return mp_const_none;
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_high_obj, pyb_pin_high);

 STATIC const mp_map_elem_t pyb_pin_locals_dict_table[] = {
     // instance methods
     { MP_OBJ_NEW_QSTR(MP_QSTR_init),    (mp_obj_t)&pyb_pin_init_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_value),   (mp_obj_t)&pyb_pin_value_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_low),     (mp_obj_t)&pyb_pin_low_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_high),    (mp_obj_t)&pyb_pin_high_obj },

     // class constants
     { MP_OBJ_NEW_QSTR(MP_QSTR_IN),        MP_OBJ_NEW_SMALL_INT(GPIO_MODE_INPUT) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_OUT),       MP_OBJ_NEW_SMALL_INT(GPIO_MODE_OUTPUT) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_OPEN_DRAIN), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_OPEN_DRAIN) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_PULL_NONE), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_NONE) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_PULL_UP),   MP_OBJ_NEW_SMALL_INT(GPIO_PULL_UP) },
     //{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_DOWN), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_DOWN) },
 };

 STATIC MP_DEFINE_CONST_DICT(pyb_pin_locals_dict, pyb_pin_locals_dict_table);

 const mp_obj_type_t pyb_pin_type = {
     { &mp_type_type },
     .name = MP_QSTR_Pin,
     .print = pyb_pin_print,
     .make_new = pyb_pin_make_new,
     .call = pyb_pin_call,
     .locals_dict = (mp_obj_t)&pyb_pin_locals_dict,
 };
	/*
	* This file is part of the Micro Python project, http://micropython.org/
	*
	* The MIT License (MIT)
	*
	* Copyright (c) 2013, 2014, 2015 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 <stdint.h>
	#include <string.h>

	#include "c_types.h"
	#include "user_interface.h"
	#include "gpio.h"

	#include "py/nlr.h"
	#include "py/runtime.h"
	#include "modpyb.h"

	#define GPIO_MODE_INPUT (0)
	#define GPIO_MODE_OUTPUT (1)
	#define GPIO_MODE_OPEN_DRAIN (2) // synthesised
	#define GPIO_PULL_NONE (0)
	#define GPIO_PULL_UP (1)
	// Removed in SDK 1.1.0
	//#define GPIO_PULL_DOWN (2)

	STATIC const pyb_pin_obj_t pyb_pin_obj[] = {
	{{&pyb_pin_type}, 0, 0, PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0},
	{{&pyb_pin_type}, 1, 1, PERIPHS_IO_MUX_U0TXD_U, FUNC_GPIO1},
	{{&pyb_pin_type}, 2, 2, PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2},
	{{&pyb_pin_type}, 3, 3, PERIPHS_IO_MUX_U0RXD_U, FUNC_GPIO3},
	{{&pyb_pin_type}, 4, 4, PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4},
	{{&pyb_pin_type}, 5, 5, PERIPHS_IO_MUX_GPIO5_U, FUNC_GPIO5},
	{{&pyb_pin_type}, 9, 9, PERIPHS_IO_MUX_SD_DATA2_U, FUNC_GPIO9},
	{{&pyb_pin_type}, 10, 10, PERIPHS_IO_MUX_SD_DATA3_U, FUNC_GPIO10},
	{{&pyb_pin_type}, 12, 12, PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12},
	{{&pyb_pin_type}, 13, 13, PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13},
	{{&pyb_pin_type}, 14, 14, PERIPHS_IO_MUX_MTMS_U, FUNC_GPIO14},
	{{&pyb_pin_type}, 15, 15, PERIPHS_IO_MUX_MTDO_U, FUNC_GPIO15},
	// GPIO16 is special, belongs to different register set, and
	// otherwise handled specially.
	{{&pyb_pin_type}, 16, 16, -1, -1},
	};

	STATIC uint8_t pin_mode[16 + 1];

	pyb_pin_obj_t *mp_obj_get_pin_obj(mp_obj_t pin_in) {
	if (mp_obj_get_type(pin_in) != &pyb_pin_type) {
	nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "expecting a pin"));
	}
	pyb_pin_obj_t *self = pin_in;
	return self;
	}

	uint mp_obj_get_pin(mp_obj_t pin_in) {
	return mp_obj_get_pin_obj(pin_in)->phys_port;
	}

	int pin_get(uint pin) {
	if (pin == 16) {
	return READ_PERI_REG(RTC_GPIO_IN_DATA) & 1;
	}
	return GPIO_INPUT_GET(pin);
	}

	void pin_set(uint pin, int value) {
	if (pin == 16) {
	int out_en = (pin_mode[pin] == GPIO_MODE_OUTPUT);
	WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) \| 1);
	WRITE_PERI_REG(RTC_GPIO_CONF, READ_PERI_REG(RTC_GPIO_CONF) & ~1);
	WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & ~1) \| out_en);
	WRITE_PERI_REG(RTC_GPIO_OUT, (READ_PERI_REG(RTC_GPIO_OUT) & ~1) \| value);
	return;
	}

	uint32_t enable = 0;
	uint32_t disable = 0;
	switch (pin_mode[pin]) {
	case GPIO_MODE_INPUT:
	value = -1;
	disable = 1;
	break;

	case GPIO_MODE_OUTPUT:
	enable = 1;
	break;

	case GPIO_MODE_OPEN_DRAIN:
	if (value == -1) {
	return;
	} else if (value == 0) {
	enable = 1;
	} else {
	value = -1;
	disable = 1;
	}
	break;
	}

	enable <<= pin;
	disable <<= pin;
	if (value == -1) {
	gpio_output_set(0, 0, enable, disable);
	} else {
	gpio_output_set(value << pin, (1 - value) << pin, enable, disable);
	}
	}

	STATIC void pyb_pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
	pyb_pin_obj_t *self = self_in;

	// pin name
	mp_printf(print, "Pin(%u)", self->pin_id);
	}

	// pin.init(mode, pull=Pin.PULL_NONE, af=-1)
	STATIC mp_obj_t pyb_pin_obj_init_helper(pyb_pin_obj_t self, mp_uint_t n_args, const mp_obj_t pos_args, mp_map_t *kw_args) {
	static const mp_arg_t allowed_args[] = {
	{ MP_QSTR_mode, MP_ARG_REQUIRED \| MP_ARG_INT },
	{ MP_QSTR_pull, MP_ARG_INT, {.u_int = GPIO_PULL_NONE}},
	{ MP_QSTR_value, MP_ARG_KW_ONLY \| MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL}},
	};

	// parse args
	struct {
	mp_arg_val_t mode, pull, value;
	} args;
	mp_arg_parse_all(n_args, pos_args, kw_args,
	MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t*)&args);

	// get io mode
	uint mode = args.mode.u_int;

	// get pull mode
	uint pull = args.pull.u_int;

	// get initial value
	int value;
	if (args.value.u_obj == MP_OBJ_NULL) {
	value = -1;
	} else {
	value = mp_obj_is_true(args.value.u_obj);
	}

	// save the mode
	pin_mode[self->phys_port] = mode;

	// configure the GPIO as requested
	if (self->phys_port == 16) {
	// TODO: Set pull up/pull down
	} else {
	PIN_FUNC_SELECT(self->periph, self->func);
	#if 0
	// Removed in SDK 1.1.0
	if ((pull & GPIO_PULL_DOWN) == 0) {
	PIN_PULLDWN_DIS(self->periph);
	}
	#endif
	if ((pull & GPIO_PULL_UP) == 0) {
	PIN_PULLUP_DIS(self->periph);
	}
	#if 0
	if ((pull & GPIO_PULL_DOWN) != 0) {
	PIN_PULLDWN_EN(self->periph);
	}
	#endif
	if ((pull & GPIO_PULL_UP) != 0) {
	PIN_PULLUP_EN(self->periph);
	}
	}

	pin_set(self->phys_port, value);

	return mp_const_none;
	}

	// constructor(id, ...)
	STATIC mp_obj_t pyb_pin_make_new(const mp_obj_type_t type, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t args) {
	mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);

	// Run an argument through the mapper and return the result.
	int wanted_pin = mp_obj_get_int(args[0]);
	pyb_pin_obj_t *pin = NULL;
	for (int i = 0; i < MP_ARRAY_SIZE(pyb_pin_obj); i++) {
	if (pyb_pin_obj[i].pin_id == wanted_pin) {
	pin = (pyb_pin_obj_t*)&pyb_pin_obj[i];
	break;
	}
	}
	if (pin == NULL) {
	nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "invalid pin"));
	}

	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);
	pyb_pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args);
	}

	return (mp_obj_t)pin;
	}

	// fast method for getting/setting pin value
	STATIC mp_obj_t pyb_pin_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);
	pyb_pin_obj_t *self = self_in;
	if (n_args == 0) {
	// get pin
	return MP_OBJ_NEW_SMALL_INT(GPIO_INPUT_GET(self->phys_port));
	} else {
	// set pin
	pin_set(self->phys_port, mp_obj_is_true(args[0]));
	return mp_const_none;
	}
	}

	// pin.init(mode, pull)
	STATIC mp_obj_t pyb_pin_obj_init(mp_uint_t n_args, const mp_obj_t args, mp_map_t kw_args) {
	return pyb_pin_obj_init_helper(args[0], n_args - 1, args + 1, kw_args);
	}
	MP_DEFINE_CONST_FUN_OBJ_KW(pyb_pin_init_obj, 1, pyb_pin_obj_init);

	// pin.value([value])
	STATIC mp_obj_t pyb_pin_value(mp_uint_t n_args, const mp_obj_t *args) {
	return pyb_pin_call(args[0], n_args - 1, 0, args + 1);
	}
	STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_pin_value_obj, 1, 2, pyb_pin_value);

	// pin.low()
	STATIC mp_obj_t pyb_pin_low(mp_obj_t self_in) {
	pyb_pin_obj_t *self = self_in;
	pin_set(self->phys_port, 0);
	return mp_const_none;
	}
	STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_low_obj, pyb_pin_low);

	// pin.high()
	STATIC mp_obj_t pyb_pin_high(mp_obj_t self_in) {
	pyb_pin_obj_t *self = self_in;
	pin_set(self->phys_port, 1);
	return mp_const_none;
	}
	STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_pin_high_obj, pyb_pin_high);

	STATIC const mp_map_elem_t pyb_pin_locals_dict_table[] = {
	// instance methods
	{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&pyb_pin_init_obj },
	{ MP_OBJ_NEW_QSTR(MP_QSTR_value), (mp_obj_t)&pyb_pin_value_obj },
	{ MP_OBJ_NEW_QSTR(MP_QSTR_low), (mp_obj_t)&pyb_pin_low_obj },
	{ MP_OBJ_NEW_QSTR(MP_QSTR_high), (mp_obj_t)&pyb_pin_high_obj },

	// class constants
	{ MP_OBJ_NEW_QSTR(MP_QSTR_IN), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_INPUT) },
	{ MP_OBJ_NEW_QSTR(MP_QSTR_OUT), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_OUTPUT) },
	{ MP_OBJ_NEW_QSTR(MP_QSTR_OPEN_DRAIN), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_OPEN_DRAIN) },
	{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_NONE), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_NONE) },
	{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_UP), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_UP) },
	//{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_DOWN), MP_OBJ_NEW_SMALL_INT(GPIO_PULL_DOWN) },
	};

	STATIC MP_DEFINE_CONST_DICT(pyb_pin_locals_dict, pyb_pin_locals_dict_table);

	const mp_obj_type_t pyb_pin_type = {
	{ &mp_type_type },
	.name = MP_QSTR_Pin,
	.print = pyb_pin_print,
	.make_new = pyb_pin_make_new,
	.call = pyb_pin_call,
	.locals_dict = (mp_obj_t)&pyb_pin_locals_dict,
	};