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circuitpython/cc3200/mods/pybpin.c
danicampora 9e44383e3f cc3200: Add power management framework. Add mpcallback class. 
Supports suspend and hibernate modes. Waking is possible throug GPIO
and WLAN.
The mpcallback class is generic and can be reused by other classes.
2015-03-11 17:00:33 +01:00

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2015 Daniel Campora
*
* 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 "py/mpconfig.h"
#include MICROPY_HAL_H
#include "py/obj.h"
#include "py/runtime.h"
#include "py/gc.h"
#include "py/mpstate.h"
#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "rom_map.h"
#include "pin.h"
#include "prcm.h"
#include "gpio.h"
#include "interrupt.h"
#include "pybpin.h"
#include "pybsleep.h"
#include "mpcallback.h"
#include "mpexception.h"
#include "mperror.h"
/// \moduleref pyb
/// \class Pin - control I/O pins
///
/// A pin is the basic object to control I/O pins. It has methods to set
/// the mode of the pin (input or output) and methods to get and set the
/// digital logic level. For analog control of a pin, see the ADC class.
///
/// Usage Model:
///
/// All CPU Pins are predefined as pyb.Pin.cpu.Name
///
/// GPIO9_pin = pyb.Pin.cpu.GPIO9
///
/// g = pyb.Pin(pyb.Pin.cpu.GPIO9, 0, pyb.Pin.IN)
///
/// CPU pins which correspond to the board pins are available
/// as `pyb.cpu.Name`.
///
/// You can also use strings:
///
/// g = pyb.Pin('GPIO9', 0)
///
/// And finally, you can also pass a pin number directly:
///
/// g = pyb.Pin(64, 0)
///
/// To summarise, the following order determines how things get mapped into
/// an ordinal pin number:
///
/// 1. Directly specify a Pin object
/// 2. Supply a string which matches a CPU pin name
/// 3. Provide a pin number
///
/// \Interrupts:
//// You can also configure the Pin to generate interrupts
///
/// Example callback:
///
/// def pincb(pin):
/// print(pin.pin())
///
/// extint = pyb.Pin('GPIO10', 0, pyb.Pin.INT_RISING, pyb.GPIO.STD_PD, pyb.S2MA)
/// extint.callback (intmode=pyb.Pin.INT_RISING, handler=pincb)
/// # the callback can be triggered manually
/// extint.callback()()
/// # to disable the callback
/// extint.callback().disable()
///
/// Now every time a falling edge is seen on the gpio pin, the callback will be
/// called. Caution: mechanical pushbuttons have "bounce" and pushing or
/// releasing a switch will often generate multiple edges.
/// See: http://www.eng.utah.edu/~cs5780/debouncing.pdf for a detailed
/// explanation, along with various techniques for debouncing.
///
/// All pin objects go through the pin mapper to come up with one of the
/// gpio pins.
///
/// There is also a C API, so that drivers which require Pin interrupts
/// can also use this code. See pybextint.h for the available functions.
/******************************************************************************
DECLARE PRIVATE FUNCTIONS
******************************************************************************/
STATIC void GPIOA0IntHandler (void);
STATIC void GPIOA1IntHandler (void);
STATIC void GPIOA2IntHandler (void);
STATIC void GPIOA3IntHandler (void);
STATIC void EXTI_Handler(uint port);
STATIC void pin_obj_configure (const pin_obj_t *self);
STATIC void pin_extint_enable (mp_obj_t self_in);
STATIC void pin_extint_disable (mp_obj_t self_in);
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
STATIC const mp_cb_methods_t pin_cb_methods;
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
void pin_init0(void) {
}
// C API used to convert a user-supplied pin name into an ordinal pin number.
pin_obj_t *pin_find(mp_obj_t user_obj) {
pin_obj_t *pin_obj;
// If a pin was provided, then use it
if (MP_OBJ_IS_TYPE(user_obj, &pin_type)) {
pin_obj = user_obj;
return pin_obj;
}
// See if the pin name matches a cpu pin
pin_obj = pin_find_named_pin(&pin_cpu_pins_locals_dict, user_obj);
if (pin_obj) {
return pin_obj;
}
// See if the pin number matches a cpu pin
mp_int_t pin_num;
if (mp_obj_get_int_maybe(user_obj, &pin_num)) {
// The Pins dictionary has pin indexes, so we must substract one from the value passed
pin_obj = pin_find_pin(&pin_cpu_pins_locals_dict, (pin_num - 1));
if (pin_obj) {
return pin_obj;
}
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
void pin_verify_af (uint af) {
if (af > PIN_MODE_15) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
}
void pin_config (pin_obj_t *self, uint af, uint mode, uint type, uint strength) {
// configure the pin in analog mode
self->af = af;
self->mode = mode;
self->type = type;
self->strength = strength;
pin_obj_configure ((const pin_obj_t *)self);
// mark the pin as used
self->used = true;
// register it with the sleep module
pybsleep_add ((const mp_obj_t)self, (WakeUpCB_t)pin_obj_configure);
}
void pin_extint_register(pin_obj_t *self, uint32_t intmode, uint32_t priority) {
void *handler;
uint32_t intnum;
// configure the interrupt type
MAP_GPIOIntTypeSet(self->port, self->bit, intmode);
switch (self->port) {
case GPIOA0_BASE:
handler = GPIOA0IntHandler;
intnum = INT_GPIOA0;
break;
case GPIOA1_BASE:
handler = GPIOA1IntHandler;
intnum = INT_GPIOA1;
break;
case GPIOA2_BASE:
handler = GPIOA2IntHandler;
intnum = INT_GPIOA2;
break;
case GPIOA3_BASE:
default:
handler = GPIOA3IntHandler;
intnum = INT_GPIOA3;
break;
}
MAP_GPIOIntRegister(self->port, handler);
// set the interrupt to the lowest priority, to make sure that
// no other ISRs will be preemted by this one
MAP_IntPrioritySet(intnum, priority);
}
/******************************************************************************
DEFINE PRIVATE FUNCTIONS
******************************************************************************/
STATIC void pin_obj_configure (const pin_obj_t *self) {
// Skip all this if the pin is to be used in analog mode
if (self->type != PYBPIN_ANALOG_TYPE) {
// verify the alternate function
pin_verify_af (self->af);
// PIN_MODE_0 means it stays as a pin, else, another peripheral will take control of it
if (self->af == PIN_MODE_0) {
// enable the peripheral clock for the GPIO port of this pin
switch (self->port) {
case PORT_A0:
MAP_PRCMPeripheralClkEnable(PRCM_GPIOA0, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
break;
case PORT_A1:
MAP_PRCMPeripheralClkEnable(PRCM_GPIOA1, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
break;
case PORT_A2:
MAP_PRCMPeripheralClkEnable(PRCM_GPIOA2, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
break;
case PORT_A3:
MAP_PRCMPeripheralClkEnable(PRCM_GPIOA3, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
break;
default:
break;
}
// configure the direction
MAP_GPIODirModeSet(self->port, self->bit, self->mode);
}
// now set the alternate function, strenght and type
MAP_PinModeSet (self->pin_num, self->af);
}
MAP_PinConfigSet(self->pin_num, self->strength, self->type);
}
STATIC void pin_extint_enable (mp_obj_t self_in) {
pin_obj_t *self = self_in;
MAP_GPIOIntClear(self->port, self->bit);
MAP_GPIOIntEnable(self->port, self->bit);
}
STATIC void pin_extint_disable (mp_obj_t self_in) {
pin_obj_t *self = self_in;
MAP_GPIOIntDisable(self->port, self->bit);
}
/******************************************************************************/
// Micro Python bindings
/// \method init(mode, pull=Pin.PULL_NONE, af=-1)
/// Initialise the pin:
///
/// - `af` can be in range 0-15, please check the CC3200 datasheet
/// for the details on the AFs availables on each pin (af=0, keeps it as a gpio pin).
/// - `mode` can be one of:
/// - `Pin.IN` - configure the pin for input;
/// - `Pin.OUT` - configure the pin for output;
/// - `type` can be one of:
/// - `Pin.STD` - standard without pull-up or pull-down;
/// - `Pin.STD_PU` - standard with pull-up resistor;
/// - `Pin.STD_PD` - standard with pull-down resistor.
/// - `Pin.OD` - standard without pull up or pull down;
/// - `Pin.OD_PU` - open drain with pull-up resistor;
/// - `Pin.OD_PD` - open drain with pull-down resistor.
/// - `Pin.ANALOG` - configured in analog (adc) mode
/// - `strength` can be one of:
/// - `Pin.S2MA` - 2ma drive strength;
/// - `Pin.S4MA` - 4ma drive strength;
/// - `Pin.S6MA` - 6ma drive strength;
///
/// Returns: `None`.
STATIC const mp_arg_t pin_init_args[] = {
{ MP_QSTR_af, MP_ARG_REQUIRED | MP_ARG_INT },
{ MP_QSTR_mode, MP_ARG_INT, {.u_int = GPIO_DIR_MODE_OUT} },
{ MP_QSTR_type, MP_ARG_INT, {.u_int = PIN_TYPE_STD} },
{ MP_QSTR_str, MP_ARG_INT, {.u_int = PIN_STRENGTH_4MA} },
};
#define pin_INIT_NUM_ARGS MP_ARRAY_SIZE(pin_init_args)
STATIC mp_obj_t pin_obj_init_helper(pin_obj_t *self, mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
// parse args
mp_arg_val_t args[pin_INIT_NUM_ARGS];
mp_arg_parse_all(n_args, pos_args, kw_args, pin_INIT_NUM_ARGS, pin_init_args, args);
// get the af
uint af = args[0].u_int;
if (af < PIN_MODE_0 || af > PIN_MODE_15) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
// get the io mode
uint mode = args[1].u_int;
// checking the mode only makes sense if af == GPIO
if (af == PIN_MODE_0) {
if (mode != GPIO_DIR_MODE_IN && mode != GPIO_DIR_MODE_OUT) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
}
// get the type
uint type = args[2].u_int;
if (type != PIN_TYPE_STD && type != PIN_TYPE_STD_PU && type != PIN_TYPE_STD_PD &&
type != PIN_TYPE_OD && type != PIN_TYPE_OD_PU && type != PIN_TYPE_OD_PD) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
// get the strenght
uint strength = args[3].u_int;
if (strength != PIN_STRENGTH_2MA && strength != PIN_STRENGTH_4MA && strength != PIN_STRENGTH_6MA) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
// configure the pin as requested
pin_config (self, af, mode, type, strength);
return mp_const_none;
}
/// \method print()
/// Return a string describing the pin object.
STATIC void pin_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
pin_obj_t *self = self_in;
uint32_t af = MAP_PinModeGet(self->pin_num);
uint32_t type = pin_get_type(self);
uint32_t strength = pin_get_strenght(self);
// pin name
print(env, "<Pin.cpu.%s, af=%u", qstr_str(self->name), af);
if (af == PIN_MODE_0) {
// IO mode
qstr mode_qst;
uint32_t mode = pin_get_mode(self);
if (mode == GPIO_DIR_MODE_IN) {
mode_qst = MP_QSTR_IN;
} else {
mode_qst = MP_QSTR_OUT;
}
print(env, ", mode=Pin.%s", qstr_str(mode_qst)); // safe because mode_qst has no formatting chars
}
// pin type
qstr type_qst;
if (type == PIN_TYPE_STD) {
type_qst = MP_QSTR_STD;
} else if (type == PIN_TYPE_STD_PU) {
type_qst = MP_QSTR_STD_PU;
} else if (type == PIN_TYPE_STD_PD) {
type_qst = MP_QSTR_STD_PD;
} else if (type == PIN_TYPE_OD) {
type_qst = MP_QSTR_OD;
} else if (type == PIN_TYPE_OD_PU) {
type_qst = MP_QSTR_OD_PU;
} else {
type_qst = MP_QSTR_OD_PD;
}
print(env, ", pull=Pin.%s", qstr_str(type_qst));
// Strength
qstr str_qst;
if (strength == PIN_STRENGTH_2MA) {
str_qst = MP_QSTR_S2MA;
} else if (strength == PIN_STRENGTH_4MA) {
str_qst = MP_QSTR_S4MA;
} else {
str_qst = MP_QSTR_S6MA;
}
print(env, ", strength=Pin.%s>", qstr_str(str_qst));
}
/// \classmethod \constructor(id, ...)
/// Create a new Pin object associated with the id. If additional arguments are given,
/// they are used to initialise the pin. See `init`.
STATIC mp_obj_t pin_make_new(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, 1, MP_OBJ_FUN_ARGS_MAX, true);
// Run an argument through the mapper and return the result.
pin_obj_t *pin = (pin_obj_t *)pin_find(args[0]);
if (n_args > 1 || n_kw > 0) {
// pin af given, so configure it
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
pin_obj_init_helper(pin, n_args - 1, args + 1, &kw_args);
}
return (mp_obj_t)pin;
}
STATIC mp_obj_t pin_obj_init(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
return pin_obj_init_helper(args[0], n_args - 1, args + 1, kw_args);
}
MP_DEFINE_CONST_FUN_OBJ_KW(pin_init_obj, 1, pin_obj_init);
/// \method value([value])
/// Get or set the digital logic level of the pin:
///
/// - With no arguments, return 0 or 1 depending on the logic level of the pin.
/// - With `value` given, set the logic level of the pin. `value` can be
/// anything that converts to a boolean. If it converts to `True`, the pin
/// is set high, otherwise it is set low.
STATIC mp_obj_t pin_value(mp_uint_t n_args, const mp_obj_t *args) {
pin_obj_t *self = args[0];
if (n_args == 1) {
// get the pin value
return MP_OBJ_NEW_SMALL_INT(MAP_GPIOPinRead(self->port, self->bit) ? 1 : 0);
} else {
// set the pin value
if (mp_obj_is_true(args[1])) {
MAP_GPIOPinWrite(self->port, self->bit, self->bit);
} else {
MAP_GPIOPinWrite(self->port, self->bit, 0);
}
return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pin_value_obj, 1, 2, pin_value);
/// \method low()
/// Set the pin to a low logic level.
STATIC mp_obj_t pin_low(mp_obj_t self_in) {
pin_obj_t *self = self_in;
MAP_GPIOPinWrite(self->port, self->bit, 0);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_low_obj, pin_low);
/// \method high()
/// Set the pin to a high logic level.
STATIC mp_obj_t pin_high(mp_obj_t self_in) {
pin_obj_t *self = self_in;
MAP_GPIOPinWrite(self->port, self->bit, self->bit);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_high_obj, pin_high);
/// \method toggle()
/// Toggles the value of the pin
STATIC mp_obj_t pin_toggle(mp_obj_t self_in) {
pin_obj_t *self = self_in;
MAP_GPIOPinWrite(self->port, self->bit, ~MAP_GPIOPinRead(self->port, self->bit));
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_toggle_obj, pin_toggle);
/// \method name()
/// Get the pin name.
STATIC mp_obj_t pin_name(mp_obj_t self_in) {
pin_obj_t *self = self_in;
return MP_OBJ_NEW_QSTR(self->name);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_name_obj, pin_name);
/// \method port()
/// Get the pin port.
STATIC mp_obj_t pin_port(mp_obj_t self_in) {
pin_obj_t *self = self_in;
return mp_obj_new_int(self->port);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_port_obj, pin_port);
/// \method pin()
/// Get the pin number.
STATIC mp_obj_t pin_pin(mp_obj_t self_in) {
pin_obj_t *self = self_in;
return MP_OBJ_NEW_SMALL_INT(self->pin_num);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_pin_obj, pin_pin);
/// \method mode()
/// Returns the currently configured mode of the gpio pin. The integer returned
/// will match one of the allowed constants for the mode argument to the init
/// function.
STATIC mp_obj_t pin_mode(mp_obj_t self_in) {
return MP_OBJ_NEW_SMALL_INT(pin_get_mode(self_in));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_mode_obj, pin_mode);
/// \method type()
/// Returns the currently configured type of the pin. The integer returned
/// will match one of the allowed constants for the type argument to the init
/// function.
STATIC mp_obj_t pin_type_get(mp_obj_t self_in) {
return MP_OBJ_NEW_SMALL_INT(pin_get_type(self_in));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_type_obj, pin_type_get);
/// \method strength()
/// Returns the currently configured drive strength of the pin. The integer returned
/// will match one of the allowed constants for the strength argument to the init
/// function.
STATIC mp_obj_t pin_strength(mp_obj_t self_in) {
return MP_OBJ_NEW_SMALL_INT(pin_get_strenght(self_in));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_strenght_obj, pin_strength);
/// \method af()
/// Returns the currently configured alternate function of the gpio pin. The integer returned
/// will match one of the allowed constants for the af argument to the init function.
STATIC mp_obj_t pin_af(mp_obj_t self_in) {
pin_obj_t *self = self_in;
return MP_OBJ_NEW_SMALL_INT(MAP_PinModeGet(self->pin_num));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_af_obj, pin_af);
/// \method callback(method, intmode, value, priority, pwrmode)
/// Creates a callback object associated to a pin
/// min num of arguments is 1 (intmode)
STATIC mp_obj_t pin_callback (mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
mp_arg_val_t args[mpcallback_INIT_NUM_ARGS];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, mpcallback_INIT_NUM_ARGS, mpcallback_init_args, args);
pin_obj_t *self = pos_args[0];
// check if any parameters were passed
if (kw_args->used > 0 || self->callback == mp_const_none) {
// convert the priority to the correct value
uint priority = mpcallback_translate_priority (args[2].u_int);
// verify the interrupt mode
uint intmode = args[0].u_int;
if (intmode != GPIO_FALLING_EDGE && intmode != GPIO_RISING_EDGE && intmode != GPIO_BOTH_EDGES &&
intmode != GPIO_LOW_LEVEL && intmode != GPIO_HIGH_LEVEL) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
if (args[4].u_int & PYB_PWR_MODE_LPDS) {
uint wake_pin;
uint wake_mode;
// pin_num is actually : (package_pin - 1)
switch (self->pin_num) {
case 56: // GPIO2
wake_pin = PRCM_LPDS_GPIO2;
break;
case 58: // GPIO4
wake_pin = PRCM_LPDS_GPIO4;
break;
case 3: // GPIO13
wake_pin = PRCM_LPDS_GPIO13;
break;
case 7: // GPIO17
wake_pin = PRCM_LPDS_GPIO17;
break;
case 1: // GPIO11
wake_pin = PRCM_LPDS_GPIO11;
break;
case 16: // GPIO24
wake_pin = PRCM_LPDS_GPIO24;
break;
default:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
break;
}
// intmodes are different in LDPS
switch (intmode) {
case GPIO_FALLING_EDGE:
wake_mode = PRCM_LPDS_FALL_EDGE;
break;
case GPIO_RISING_EDGE:
wake_mode = PRCM_LPDS_RISE_EDGE;
break;
case GPIO_LOW_LEVEL:
wake_mode = PRCM_LPDS_LOW_LEVEL;
break;
case GPIO_HIGH_LEVEL:
wake_mode = PRCM_LPDS_HIGH_LEVEL;
break;
default:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
break;
}
// enable GPIO as a wake source during LPDS
MAP_PRCMLPDSWakeUpGPIOSelect(wake_pin, wake_mode);
MAP_PRCMLPDSWakeupSourceEnable(PRCM_LPDS_GPIO);
}
if (args[4].u_int & PYB_PWR_MODE_HIBERNATE) {
uint wake_pin;
uint wake_mode;
// pin_num is actually : (package_pin - 1)
switch (self->pin_num) {
case 56: // GPIO2
wake_pin = PRCM_HIB_GPIO2;
break;
case 58: // GPIO4
wake_pin = PRCM_HIB_GPIO4;
break;
case 3: // GPIO13
wake_pin = PRCM_HIB_GPIO13;
break;
case 7: // GPIO17
wake_pin = PRCM_HIB_GPIO17;
break;
case 1: // GPIO11
wake_pin = PRCM_HIB_GPIO11;
break;
case 16: // GPIO24
wake_pin = PRCM_HIB_GPIO24;
break;
default:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
break;
}
// intmodes are bit different in hibernate
switch (intmode) {
case GPIO_FALLING_EDGE:
wake_mode = PRCM_HIB_FALL_EDGE;
break;
case GPIO_RISING_EDGE:
wake_mode = PRCM_HIB_RISE_EDGE;
break;
case GPIO_LOW_LEVEL:
wake_mode = PRCM_HIB_LOW_LEVEL;
break;
case GPIO_HIGH_LEVEL:
wake_mode = PRCM_HIB_HIGH_LEVEL;
break;
default:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
break;
}
// enable GPIO as a wake source during hibernate
MAP_PRCMHibernateWakeUpGPIOSelect(wake_pin, wake_mode);
MAP_PRCMHibernateWakeupSourceEnable(wake_pin);
}
// we need to update the callback atomically, so we disable the
// interrupt before we update anything.
pin_extint_disable(self);
// register the interrupt
pin_extint_register((pin_obj_t *)self, intmode, priority);
// create the callback
self->callback = mpcallback_new (self, args[1].u_obj, &pin_cb_methods);
// enable the interrupt just before leaving
pin_extint_enable(self);
}
return self->callback;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pin_callback_obj, 1, pin_callback);
STATIC const mp_map_elem_t pin_locals_dict_table[] = {
// instance methods
{ MP_OBJ_NEW_QSTR(MP_QSTR_init), (mp_obj_t)&pin_init_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_value), (mp_obj_t)&pin_value_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_low), (mp_obj_t)&pin_low_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_high), (mp_obj_t)&pin_high_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_toggle), (mp_obj_t)&pin_toggle_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_name), (mp_obj_t)&pin_name_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_port), (mp_obj_t)&pin_port_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_pin), (mp_obj_t)&pin_pin_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_mode), (mp_obj_t)&pin_mode_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_type), (mp_obj_t)&pin_type_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_strength), (mp_obj_t)&pin_strenght_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_af), (mp_obj_t)&pin_af_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_callback), (mp_obj_t)&pin_callback_obj },
// class attributes
{ MP_OBJ_NEW_QSTR(MP_QSTR_cpu), (mp_obj_t)&pin_cpu_pins_obj_type },
// class constants
/// \constant IN - set the pin to input mode
/// \constant OUT - set the pin to output mode
/// \constant STD - set the pin to standard mode without pull-up or pull-down
/// \constant STD_PU - set the pin to standard mode with pull-up
/// \constant STD_PD - set the pin to standard mode with pull-down
/// \constant OD - set the pin to open drain mode without pull-up or pull-down
/// \constant OD_PU - set the pin to open drain mode with pull-up
/// \constant OD_PD - set the pin to open drain mode with pull-down
/// \constant IRQ_RISING - interrupt on a rising edge
/// \constant IRQ_FALLING - interrupt on a falling edge
/// \constant IRQ_RISING_FALLING - interrupt on a rising or falling edge
/// \constant IRQ_LOW_LEVEL - interrupt on a low level
/// \constant IRQ_HIGH_LEVEL - interrupt on a high level
/// \constant 2MA - set the drive strength to 2ma
/// \constant 4MA - set the drive strength to 4ma
/// \constant 6MA - set the drive strength to 6ma
{ MP_OBJ_NEW_QSTR(MP_QSTR_IN), MP_OBJ_NEW_SMALL_INT(GPIO_DIR_MODE_IN) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_OUT), MP_OBJ_NEW_SMALL_INT(GPIO_DIR_MODE_OUT) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_STD), MP_OBJ_NEW_SMALL_INT(PIN_TYPE_STD) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_STD_PU), MP_OBJ_NEW_SMALL_INT(PIN_TYPE_STD_PU) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_STD_PD), MP_OBJ_NEW_SMALL_INT(PIN_TYPE_STD_PD) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_OD), MP_OBJ_NEW_SMALL_INT(PIN_TYPE_OD) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_OD_PU), MP_OBJ_NEW_SMALL_INT(PIN_TYPE_OD_PU) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_OD_PD), MP_OBJ_NEW_SMALL_INT(PIN_TYPE_OD_PD) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_INT_FALLING), MP_OBJ_NEW_SMALL_INT(GPIO_FALLING_EDGE) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_INT_RISING), MP_OBJ_NEW_SMALL_INT(GPIO_RISING_EDGE) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_INT_RISING_FALLING), MP_OBJ_NEW_SMALL_INT(GPIO_BOTH_EDGES) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_INT_LOW_LEVEL), MP_OBJ_NEW_SMALL_INT(GPIO_LOW_LEVEL) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_INT_HIGH_LEVEL), MP_OBJ_NEW_SMALL_INT(GPIO_HIGH_LEVEL) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_S2MA), MP_OBJ_NEW_SMALL_INT(PIN_STRENGTH_2MA) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_S4MA), MP_OBJ_NEW_SMALL_INT(PIN_STRENGTH_4MA) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_S6MA), MP_OBJ_NEW_SMALL_INT(PIN_STRENGTH_6MA) },
};
STATIC MP_DEFINE_CONST_DICT(pin_locals_dict, pin_locals_dict_table);
const mp_obj_type_t pin_type = {
{ &mp_type_type },
.name = MP_QSTR_Pin,
.print = pin_print,
.make_new = pin_make_new,
.locals_dict = (mp_obj_t)&pin_locals_dict,
};
STATIC const mp_cb_methods_t pin_cb_methods = {
.init = pin_callback,
.enable = pin_extint_enable,
.disable = pin_extint_disable,
};
STATIC void GPIOA0IntHandler (void) {
EXTI_Handler(GPIOA0_BASE);
}
STATIC void GPIOA1IntHandler (void) {
EXTI_Handler(GPIOA1_BASE);
}
STATIC void GPIOA2IntHandler (void) {
EXTI_Handler(GPIOA2_BASE);
}
STATIC void GPIOA3IntHandler (void) {
EXTI_Handler(GPIOA3_BASE);
}
// common interrupt handler
STATIC void EXTI_Handler(uint port) {
pin_obj_t *self;
uint32_t bit = MAP_GPIOIntStatus(port, true);
MAP_GPIOIntClear(port, bit);
if (NULL != (self = (pin_obj_t *)pin_find_pin_by_port_bit(&pin_cpu_pins_locals_dict, port, bit))) {
mpcallback_handler(self->callback);
}
}
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