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circuitpython/cc3200/mods/pybpin.c

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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 "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 "mpirq.h"
#include "pins.h"
#include "pybsleep.h"
#include "mpexception.h"
#include "mperror.h"
/// \moduleref pyb
/// \class Pin - control I/O pins
///
/******************************************************************************
DECLARE PRIVATE FUNCTIONS
******************************************************************************/
STATIC pin_obj_t *pin_find_named_pin(const mp_obj_dict_t *named_pins, mp_obj_t name);
STATIC pin_obj_t *pin_find_pin_by_port_bit (const mp_obj_dict_t *named_pins, uint port, uint bit);
STATIC int8_t pin_obj_find_af (const pin_obj_t* pin, uint8_t fn, uint8_t unit, uint8_t type);
STATIC void pin_free_af_from_pins (uint8_t fn, uint8_t unit, uint8_t type);
STATIC void pin_deassign (pin_obj_t* pin);
STATIC void pin_obj_configure (const pin_obj_t *self);
STATIC void pin_get_hibernate_pin_and_idx (const pin_obj_t *self, uint *wake_pin, uint *idx);
STATIC void pin_irq_enable (mp_obj_t self_in);
STATIC void pin_irq_disable (mp_obj_t self_in);
STATIC void pin_extint_register(pin_obj_t *self, uint32_t intmode, uint32_t priority);
STATIC void pin_validate_mode (uint mode);
STATIC void pin_validate_pull (uint pull);
STATIC void pin_validate_drive (uint strength);
STATIC void pin_validate_af(const pin_obj_t* pin, int8_t idx, uint8_t *fn, uint8_t *unit, uint8_t *type);
STATIC uint8_t pin_get_value(const pin_obj_t* self);
STATIC void GPIOA0IntHandler (void);
STATIC void GPIOA1IntHandler (void);
STATIC void GPIOA2IntHandler (void);
STATIC void GPIOA3IntHandler (void);
STATIC void EXTI_Handler(uint port);
/******************************************************************************
DEFINE CONSTANTS
******************************************************************************/
#define PYBPIN_NUM_WAKE_PINS (6)
#define PYBPIN_WAKES_NOT (-1)
#define GPIO_DIR_MODE_ALT 0x00000002 // Pin is NOT controlled by the PGIO module
#define GPIO_DIR_MODE_ALT_OD 0x00000003 // Pin is NOT controlled by the PGIO module and is in open drain mode
#define PYB_PIN_FALLING_EDGE 0x01
#define PYB_PIN_RISING_EDGE 0x02
#define PYB_PIN_LOW_LEVEL 0x04
#define PYB_PIN_HIGH_LEVEL 0x08
/******************************************************************************
DEFINE TYPES
******************************************************************************/
typedef struct {
bool active;
int8_t lpds;
int8_t hib;
} pybpin_wake_pin_t;
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
STATIC const mp_irq_methods_t pin_irq_methods;
STATIC pybpin_wake_pin_t pybpin_wake_pin[PYBPIN_NUM_WAKE_PINS] =
{ {.active = false, .lpds = PYBPIN_WAKES_NOT, .hib = PYBPIN_WAKES_NOT},
{.active = false, .lpds = PYBPIN_WAKES_NOT, .hib = PYBPIN_WAKES_NOT},
{.active = false, .lpds = PYBPIN_WAKES_NOT, .hib = PYBPIN_WAKES_NOT},
{.active = false, .lpds = PYBPIN_WAKES_NOT, .hib = PYBPIN_WAKES_NOT},
{.active = false, .lpds = PYBPIN_WAKES_NOT, .hib = PYBPIN_WAKES_NOT},
{.active = false, .lpds = PYBPIN_WAKES_NOT, .hib = PYBPIN_WAKES_NOT} } ;
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
void pin_init0(void) {
// this initalization also reconfigures the JTAG/SWD pins
#ifndef DEBUG
// assign all pins to the GPIO module so that peripherals can be connected to any
// pins without conflicts after a soft reset
mp_map_t *named_map = mp_obj_dict_get_map((mp_obj_t)&pin_board_pins_locals_dict);
for (uint i = 0; i < named_map->used - 1; i++) {
pin_obj_t * pin = (pin_obj_t *)named_map->table[i].value;
pin_deassign (pin);
}
#endif
}
// 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, use it
if (MP_OBJ_IS_TYPE(user_obj, &pin_type)) {
pin_obj = user_obj;
return pin_obj;
}
// otherwise see if the pin name matches a cpu pin
pin_obj = pin_find_named_pin(&pin_board_pins_locals_dict, user_obj);
if (pin_obj) {
return pin_obj;
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
void pin_config (pin_obj_t *self, int af, uint mode, uint pull, int value, uint strength) {
self->mode = mode, self->pull = pull, self->strength = strength;
// if af is -1, then we want to keep it as it is
if (af != -1) {
self->af = af;
}
// if value is -1, then we want to keep it as it is
if (value != -1) {
self->value = value;
}
// mark the pin as used
self->used = true;
pin_obj_configure ((const pin_obj_t *)self);
// register it with the sleep module
pyb_sleep_add ((const mp_obj_t)self, (WakeUpCB_t)pin_obj_configure);
}
void pin_assign_pins_af (mp_obj_t *pins, uint32_t n_pins, uint32_t pull, uint32_t fn, uint32_t unit) {
for (int i = 0; i < n_pins; i++) {
pin_free_af_from_pins(fn, unit, i);
if (pins[i] != mp_const_none) {
pin_obj_t *pin = pin_find(pins[i]);
pin_config (pin, pin_find_af_index(pin, fn, unit, i), 0, pull, -1, PIN_STRENGTH_2MA);
}
}
}
uint8_t pin_find_peripheral_unit (const mp_obj_t pin, uint8_t fn, uint8_t type) {
pin_obj_t *pin_o = pin_find(pin);
for (int i = 0; i < pin_o->num_afs; i++) {
if (pin_o->af_list[i].fn == fn && pin_o->af_list[i].type == type) {
return pin_o->af_list[i].unit;
}
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
uint8_t pin_find_peripheral_type (const mp_obj_t pin, uint8_t fn, uint8_t unit) {
pin_obj_t *pin_o = pin_find(pin);
for (int i = 0; i < pin_o->num_afs; i++) {
if (pin_o->af_list[i].fn == fn && pin_o->af_list[i].unit == unit) {
return pin_o->af_list[i].type;
}
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
int8_t pin_find_af_index (const pin_obj_t* pin, uint8_t fn, uint8_t unit, uint8_t type) {
int8_t af = pin_obj_find_af(pin, fn, unit, type);
if (af < 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
return af;
}
/******************************************************************************
DEFINE PRIVATE FUNCTIONS
******************************************************************************/
STATIC pin_obj_t *pin_find_named_pin(const mp_obj_dict_t *named_pins, mp_obj_t name) {
mp_map_t *named_map = mp_obj_dict_get_map((mp_obj_t)named_pins);
mp_map_elem_t *named_elem = mp_map_lookup(named_map, name, MP_MAP_LOOKUP);
if (named_elem != NULL && named_elem->value != NULL) {
return named_elem->value;
}
return NULL;
}
STATIC pin_obj_t *pin_find_pin_by_port_bit (const mp_obj_dict_t *named_pins, uint port, uint bit) {
mp_map_t *named_map = mp_obj_dict_get_map((mp_obj_t)named_pins);
for (uint i = 0; i < named_map->used; i++) {
if ((((pin_obj_t *)named_map->table[i].value)->port == port) &&
(((pin_obj_t *)named_map->table[i].value)->bit == bit)) {
return named_map->table[i].value;
}
}
return NULL;
}
STATIC int8_t pin_obj_find_af (const pin_obj_t* pin, uint8_t fn, uint8_t unit, uint8_t type) {
for (int i = 0; i < pin->num_afs; i++) {
if (pin->af_list[i].fn == fn && pin->af_list[i].unit == unit && pin->af_list[i].type == type) {
return pin->af_list[i].idx;
}
}
return -1;
}
STATIC void pin_free_af_from_pins (uint8_t fn, uint8_t unit, uint8_t type) {
mp_map_t *named_map = mp_obj_dict_get_map((mp_obj_t)&pin_board_pins_locals_dict);
for (uint i = 0; i < named_map->used - 1; i++) {
pin_obj_t * pin = (pin_obj_t *)named_map->table[i].value;
// af is different than GPIO
if (pin->af > PIN_MODE_0) {
// check if the pin supports the target af
int af = pin_obj_find_af(pin, fn, unit, type);
if (af > 0 && af == pin->af) {
// the pin supports the target af, de-assign it
pin_deassign (pin);
}
}
}
}
STATIC void pin_deassign (pin_obj_t* pin) {
pin_config (pin, PIN_MODE_0, GPIO_DIR_MODE_IN, PIN_TYPE_STD, -1, PIN_STRENGTH_4MA);
pin->used = false;
}
STATIC void pin_obj_configure (const pin_obj_t *self) {
uint32_t type;
if (self->mode == PIN_TYPE_ANALOG) {
type = PIN_TYPE_ANALOG;
} else {
type = self->pull;
uint32_t direction = self->mode;
if (direction == PIN_TYPE_OD || direction == GPIO_DIR_MODE_ALT_OD) {
direction = GPIO_DIR_MODE_OUT;
type |= PIN_TYPE_OD;
}
if (self->mode != GPIO_DIR_MODE_ALT && self->mode != GPIO_DIR_MODE_ALT_OD) {
// 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, direction);
// set the pin value
if (self->value) {
MAP_GPIOPinWrite(self->port, self->bit, self->bit);
} else {
MAP_GPIOPinWrite(self->port, self->bit, 0);
}
}
// now set the alternate function
MAP_PinModeSet (self->pin_num, self->af);
}
MAP_PinConfigSet(self->pin_num, self->strength, type);
}
STATIC void pin_get_hibernate_pin_and_idx (const pin_obj_t *self, uint *hib_pin, uint *idx) {
// pin_num is actually : (package_pin - 1)
switch (self->pin_num) {
case 56: // GP2
*hib_pin = PRCM_HIB_GPIO2;
*idx = 0;
break;
case 58: // GP4
*hib_pin = PRCM_HIB_GPIO4;
*idx = 1;
break;
case 3: // GP13
*hib_pin = PRCM_HIB_GPIO13;
*idx = 2;
break;
case 7: // GP17
*hib_pin = PRCM_HIB_GPIO17;
*idx = 3;
break;
case 1: // GP11
*hib_pin = PRCM_HIB_GPIO11;
*idx = 4;
break;
case 16: // GP24
*hib_pin = PRCM_HIB_GPIO24;
*idx = 5;
break;
default:
*idx = 0xFF;
break;
}
}
STATIC void pin_irq_enable (mp_obj_t self_in) {
const pin_obj_t *self = self_in;
uint hib_pin, idx;
pin_get_hibernate_pin_and_idx (self, &hib_pin, &idx);
if (idx < PYBPIN_NUM_WAKE_PINS) {
if (pybpin_wake_pin[idx].lpds != PYBPIN_WAKES_NOT) {
// enable GPIO as a wake source during LPDS
MAP_PRCMLPDSWakeUpGPIOSelect(idx, pybpin_wake_pin[idx].lpds);
MAP_PRCMLPDSWakeupSourceEnable(PRCM_LPDS_GPIO);
}
if (pybpin_wake_pin[idx].hib != PYBPIN_WAKES_NOT) {
// enable GPIO as a wake source during hibernate
MAP_PRCMHibernateWakeUpGPIOSelect(hib_pin, pybpin_wake_pin[idx].hib);
MAP_PRCMHibernateWakeupSourceEnable(hib_pin);
}
else {
MAP_PRCMHibernateWakeupSourceDisable(hib_pin);
}
}
// if idx is invalid, the pin supports active interrupts for sure
if (idx >= PYBPIN_NUM_WAKE_PINS || pybpin_wake_pin[idx].active) {
MAP_GPIOIntClear(self->port, self->bit);
MAP_GPIOIntEnable(self->port, self->bit);
}
// in case it was enabled before
else if (idx < PYBPIN_NUM_WAKE_PINS && !pybpin_wake_pin[idx].active) {
MAP_GPIOIntDisable(self->port, self->bit);
}
}
STATIC void pin_irq_disable (mp_obj_t self_in) {
const pin_obj_t *self = self_in;
uint hib_pin, idx;
pin_get_hibernate_pin_and_idx (self, &hib_pin, &idx);
if (idx < PYBPIN_NUM_WAKE_PINS) {
if (pybpin_wake_pin[idx].lpds != PYBPIN_WAKES_NOT) {
// disable GPIO as a wake source during LPDS
MAP_PRCMLPDSWakeupSourceDisable(PRCM_LPDS_GPIO);
}
if (pybpin_wake_pin[idx].hib != PYBPIN_WAKES_NOT) {
// disable GPIO as a wake source during hibernate
MAP_PRCMHibernateWakeupSourceDisable(hib_pin);
}
}
// not need to check for the active flag, it's safe to disable it anyway
MAP_GPIOIntDisable(self->port, self->bit);
}
STATIC int pin_irq_flags (mp_obj_t self_in) {
const pin_obj_t *self = self_in;
return self->irq_flags;
}
STATIC 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);
}
STATIC void pin_validate_mode (uint mode) {
if (mode != GPIO_DIR_MODE_IN && mode != GPIO_DIR_MODE_OUT && mode != PIN_TYPE_OD &&
mode != GPIO_DIR_MODE_ALT && mode != GPIO_DIR_MODE_ALT_OD) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
}
STATIC void pin_validate_pull (uint pull) {
if (pull != PIN_TYPE_STD && pull != PIN_TYPE_STD_PU && pull != PIN_TYPE_STD_PD) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
}
STATIC void pin_validate_drive(uint strength) {
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));
}
}
STATIC void pin_validate_af(const pin_obj_t* pin, int8_t idx, uint8_t *fn, uint8_t *unit, uint8_t *type) {
for (int i = 0; i < pin->num_afs; i++) {
if (pin->af_list[i].idx == idx) {
*fn = pin->af_list[i].fn;
*unit = pin->af_list[i].unit;
*type = pin->af_list[i].type;
return;
}
}
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
STATIC uint8_t pin_get_value (const pin_obj_t* self) {
uint32_t value;
bool setdir = false;
if (self->mode == PIN_TYPE_OD || self->mode == GPIO_DIR_MODE_ALT_OD) {
setdir = true;
// configure the direction to IN for a moment in order to read the pin value
MAP_GPIODirModeSet(self->port, self->bit, GPIO_DIR_MODE_IN);
}
// now get the value
value = MAP_GPIOPinRead(self->port, self->bit);
if (setdir) {
// set the direction back to output
MAP_GPIODirModeSet(self->port, self->bit, GPIO_DIR_MODE_OUT);
if (self->value) {
MAP_GPIOPinWrite(self->port, self->bit, self->bit);
} else {
MAP_GPIOPinWrite(self->port, self->bit, 0);
}
}
// return it
return value ? 1 : 0;
}
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) {
uint32_t bits = MAP_GPIOIntStatus(port, true);
MAP_GPIOIntClear(port, bits);
// might be that we have more than one pin interrupt pending
// therefore we must loop through all of the 8 possible bits
for (int i = 0; i < 8; i++) {
uint32_t bit = (1 << i);
if (bit & bits) {
pin_obj_t *self = (pin_obj_t *)pin_find_pin_by_port_bit(&pin_board_pins_locals_dict, port, bit);
if (self->irq_trigger == (PYB_PIN_FALLING_EDGE | PYB_PIN_RISING_EDGE)) {
// read the pin value (hoping that the pin level has remained stable)
self->irq_flags = MAP_GPIOPinRead(self->port, self->bit) ? PYB_PIN_RISING_EDGE : PYB_PIN_FALLING_EDGE;
} else {
// same as the triggers
self->irq_flags = self->irq_trigger;
}
mp_irq_handler(mp_irq_find(self));
// always clear the flags after leaving the user handler
self->irq_flags = 0;
}
}
}
/******************************************************************************/
// Micro Python bindings
STATIC const mp_arg_t pin_init_args[] = {
{ MP_QSTR_mode, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_pull, MP_ARG_OBJ, {.u_obj = mp_const_none} },
{ MP_QSTR_value, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_drive, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = PIN_STRENGTH_4MA} },
{ MP_QSTR_alt, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
};
#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 io mode
uint mode;
// default is input
if (args[0].u_obj == MP_OBJ_NULL) {
mode = GPIO_DIR_MODE_IN;
} else {
mode = mp_obj_get_int(args[0].u_obj);
pin_validate_mode (mode);
}
// get the pull type
uint pull;
if (args[1].u_obj == mp_const_none) {
pull = PIN_TYPE_STD;
} else {
pull = mp_obj_get_int(args[1].u_obj);
pin_validate_pull (pull);
}
// get the value
int value = -1;
if (args[2].u_obj != MP_OBJ_NULL) {
if (mp_obj_is_true(args[2].u_obj)) {
value = 1;
} else {
value = 0;
}
}
// get the strenght
uint strength = args[3].u_int;
pin_validate_drive(strength);
// get the alternate function
int af = args[4].u_int;
if (mode != GPIO_DIR_MODE_ALT && mode != GPIO_DIR_MODE_ALT_OD) {
if (af == -1) {
af = 0;
} else {
goto invalid_args;
}
} else if (af < -1 || af > 15) {
goto invalid_args;
}
// check for a valid af and then free it from any other pins
if (af > PIN_MODE_0) {
uint8_t fn, unit, type;
pin_validate_af (self, af, &fn, &unit, &type);
pin_free_af_from_pins(fn, unit, type);
}
pin_config (self, af, mode, pull, value, strength);
return mp_const_none;
invalid_args:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
STATIC void pin_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
pin_obj_t *self = self_in;
uint32_t pull = self->pull;
uint32_t drive = self->strength;
// pin name
mp_printf(print, "Pin('%q'", self->name);
// pin mode
qstr mode_qst;
uint32_t mode = self->mode;
if (mode == GPIO_DIR_MODE_IN) {
mode_qst = MP_QSTR_IN;
} else if (mode == GPIO_DIR_MODE_OUT) {
mode_qst = MP_QSTR_OUT;
} else if (mode == GPIO_DIR_MODE_ALT) {
mode_qst = MP_QSTR_ALT;
} else if (mode == GPIO_DIR_MODE_ALT_OD) {
mode_qst = MP_QSTR_ALT_OPEN_DRAIN;
} else {
mode_qst = MP_QSTR_OPEN_DRAIN;
}
mp_printf(print, ", mode=Pin.%q", mode_qst);
// pin pull
qstr pull_qst;
if (pull == PIN_TYPE_STD) {
mp_printf(print, ", pull=%q", MP_QSTR_None);
} else {
if (pull == PIN_TYPE_STD_PU) {
pull_qst = MP_QSTR_PULL_UP;
} else {
pull_qst = MP_QSTR_PULL_DOWN;
}
mp_printf(print, ", pull=Pin.%q", pull_qst);
}
// pin drive
qstr drv_qst;
if (drive == PIN_STRENGTH_2MA) {
drv_qst = MP_QSTR_LOW_POWER;
} else if (drive == PIN_STRENGTH_4MA) {
drv_qst = MP_QSTR_MED_POWER;
} else {
drv_qst = MP_QSTR_HIGH_POWER;
}
mp_printf(print, ", drive=Pin.%q", drv_qst);
// pin af
int alt = (self->af == 0) ? -1 : self->af;
mp_printf(print, ", alt=%d)", alt);
}
STATIC mp_obj_t 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.
pin_obj_t *pin = (pin_obj_t *)pin_find(args[0]);
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);
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 value
return MP_OBJ_NEW_SMALL_INT(pin_get_value(self));
} else {
// set the pin value
if (mp_obj_is_true(args[1])) {
self->value = 1;
MAP_GPIOPinWrite(self->port, self->bit, self->bit);
} else {
self->value = 0;
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);
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);
STATIC mp_obj_t pin_id(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_id_obj, pin_id);
STATIC mp_obj_t pin_mode(mp_uint_t n_args, const mp_obj_t *args) {
pin_obj_t *self = args[0];
if (n_args == 1) {
return mp_obj_new_int(self->mode);
} else {
uint32_t mode = mp_obj_get_int(args[1]);
pin_validate_mode (mode);
self->mode = mode;
pin_obj_configure(self);
return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pin_mode_obj, 1, 2, pin_mode);
STATIC mp_obj_t pin_pull(mp_uint_t n_args, const mp_obj_t *args) {
pin_obj_t *self = args[0];
if (n_args == 1) {
if (self->pull == PIN_TYPE_STD) {
return mp_const_none;
}
return mp_obj_new_int(self->pull);
} else {
uint32_t pull;
if (args[1] == mp_const_none) {
pull = PIN_TYPE_STD;
} else {
pull = mp_obj_get_int(args[1]);
pin_validate_pull (pull);
}
self->pull = pull;
pin_obj_configure(self);
return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pin_pull_obj, 1, 2, pin_pull);
STATIC mp_obj_t pin_drive(mp_uint_t n_args, const mp_obj_t *args) {
pin_obj_t *self = args[0];
if (n_args == 1) {
return mp_obj_new_int(self->strength);
} else {
uint32_t strength = mp_obj_get_int(args[1]);
pin_validate_drive (strength);
self->strength = strength;
pin_obj_configure(self);
return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pin_drive_obj, 1, 2, pin_drive);
STATIC mp_obj_t 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);
mp_obj_t _args[2] = {self_in, *args};
return pin_value (n_args + 1, _args);
}
STATIC mp_obj_t pin_alt_list(mp_obj_t self_in) {
pin_obj_t *self = self_in;
mp_obj_t af[2];
mp_obj_t afs = mp_obj_new_list(0, NULL);
for (int i = 0; i < self->num_afs; i++) {
af[0] = MP_OBJ_NEW_QSTR(self->af_list[i].name);
af[1] = mp_obj_new_int(self->af_list[i].idx);
mp_obj_list_append(afs, mp_obj_new_tuple(MP_ARRAY_SIZE(af), af));
}
return afs;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pin_alt_list_obj, pin_alt_list);
/// \method irq(trigger, priority, handler, wake)
STATIC mp_obj_t pin_irq (mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
mp_arg_val_t args[mp_irq_INIT_NUM_ARGS];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, mp_irq_INIT_NUM_ARGS, mp_irq_init_args, args);
pin_obj_t *self = pos_args[0];
// convert the priority to the correct value
uint priority = mp_irq_translate_priority (args[1].u_int);
// verify and translate the interrupt mode
uint mp_trigger = mp_obj_get_int(args[0].u_obj);
uint trigger;
if (mp_trigger == (PYB_PIN_FALLING_EDGE | PYB_PIN_RISING_EDGE)) {
trigger = GPIO_BOTH_EDGES;
} else {
switch (mp_trigger) {
case PYB_PIN_FALLING_EDGE:
trigger = GPIO_FALLING_EDGE;
break;
case PYB_PIN_RISING_EDGE:
trigger = GPIO_RISING_EDGE;
break;
case PYB_PIN_LOW_LEVEL:
trigger = GPIO_LOW_LEVEL;
break;
case PYB_PIN_HIGH_LEVEL:
trigger = GPIO_HIGH_LEVEL;
break;
default:
goto invalid_args;
}
}
uint8_t pwrmode = (args[3].u_obj == mp_const_none) ? PYB_PWR_MODE_ACTIVE : mp_obj_get_int(args[3].u_obj);
if (pwrmode > (PYB_PWR_MODE_ACTIVE | PYB_PWR_MODE_LPDS | PYB_PWR_MODE_HIBERNATE)) {
goto invalid_args;
}
// get the wake info from this pin
uint hib_pin, idx;
pin_get_hibernate_pin_and_idx ((const pin_obj_t *)self, &hib_pin, &idx);
if (pwrmode & PYB_PWR_MODE_LPDS) {
if (idx >= PYBPIN_NUM_WAKE_PINS) {
goto invalid_args;
}
// wake modes are different in LDPS
uint wake_mode;
switch (trigger) {
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:
goto invalid_args;
break;
}
// first clear the lpds value from all wake-able pins
for (uint i = 0; i < PYBPIN_NUM_WAKE_PINS; i++) {
pybpin_wake_pin[i].lpds = PYBPIN_WAKES_NOT;
}
// enable this pin as a wake-up source during LPDS
pybpin_wake_pin[idx].lpds = wake_mode;
} else if (idx < PYBPIN_NUM_WAKE_PINS) {
// this pin was the previous LPDS wake source, so disable it completely
if (pybpin_wake_pin[idx].lpds != PYBPIN_WAKES_NOT) {
MAP_PRCMLPDSWakeupSourceDisable(PRCM_LPDS_GPIO);
}
pybpin_wake_pin[idx].lpds = PYBPIN_WAKES_NOT;
}
if (pwrmode & PYB_PWR_MODE_HIBERNATE) {
if (idx >= PYBPIN_NUM_WAKE_PINS) {
goto invalid_args;
}
// wake modes are different in hibernate
uint wake_mode;
switch (trigger) {
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:
goto invalid_args;
break;
}
// enable this pin as wake-up source during hibernate
pybpin_wake_pin[idx].hib = wake_mode;
} else if (idx < PYBPIN_NUM_WAKE_PINS) {
pybpin_wake_pin[idx].hib = PYBPIN_WAKES_NOT;
}
// we need to update the callback atomically, so we disable the
// interrupt before we update anything.
pin_irq_disable(self);
if (pwrmode & PYB_PWR_MODE_ACTIVE) {
// register the interrupt
pin_extint_register((pin_obj_t *)self, trigger, priority);
if (idx < PYBPIN_NUM_WAKE_PINS) {
pybpin_wake_pin[idx].active = true;
}
} else if (idx < PYBPIN_NUM_WAKE_PINS) {
pybpin_wake_pin[idx].active = false;
}
// all checks have passed, we can create the irq object
mp_obj_t _irq = mp_irq_new (self, args[2].u_obj, &pin_irq_methods);
if (pwrmode & PYB_PWR_MODE_LPDS) {
pyb_sleep_set_gpio_lpds_callback (_irq);
}
// save the mp_trigge for later
self->irq_trigger = mp_trigger;
// enable the interrupt just before leaving
pin_irq_enable(self);
return _irq;
invalid_args:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pin_irq_obj, 1, pin_irq);
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_toggle), (mp_obj_t)&pin_toggle_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_id), (mp_obj_t)&pin_id_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_mode), (mp_obj_t)&pin_mode_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_pull), (mp_obj_t)&pin_pull_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_drive), (mp_obj_t)&pin_drive_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_alt_list), (mp_obj_t)&pin_alt_list_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_irq), (mp_obj_t)&pin_irq_obj },
// class attributes
{ MP_OBJ_NEW_QSTR(MP_QSTR_board), (mp_obj_t)&pin_board_pins_obj_type },
// class constants
{ 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_OPEN_DRAIN), MP_OBJ_NEW_SMALL_INT(PIN_TYPE_OD) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_ALT), MP_OBJ_NEW_SMALL_INT(GPIO_DIR_MODE_ALT) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_ALT_OPEN_DRAIN), MP_OBJ_NEW_SMALL_INT(GPIO_DIR_MODE_ALT_OD) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_UP), MP_OBJ_NEW_SMALL_INT(PIN_TYPE_STD_PU) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_PULL_DOWN), MP_OBJ_NEW_SMALL_INT(PIN_TYPE_STD_PD) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_LOW_POWER), MP_OBJ_NEW_SMALL_INT(PIN_STRENGTH_2MA) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_MED_POWER), MP_OBJ_NEW_SMALL_INT(PIN_STRENGTH_4MA) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_HIGH_POWER), MP_OBJ_NEW_SMALL_INT(PIN_STRENGTH_6MA) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_IRQ_FALLING), MP_OBJ_NEW_SMALL_INT(PYB_PIN_FALLING_EDGE) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_IRQ_RISING), MP_OBJ_NEW_SMALL_INT(PYB_PIN_RISING_EDGE) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_IRQ_LOW_LEVEL), MP_OBJ_NEW_SMALL_INT(PYB_PIN_LOW_LEVEL) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_IRQ_HIGH_LEVEL), MP_OBJ_NEW_SMALL_INT(PYB_PIN_HIGH_LEVEL) },
};
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,
.call = pin_call,
.locals_dict = (mp_obj_t)&pin_locals_dict,
};
STATIC const mp_irq_methods_t pin_irq_methods = {
.init = pin_irq,
.enable = pin_irq_enable,
.disable = pin_irq_disable,
.flags = pin_irq_flags,
};
STATIC void pin_named_pins_obj_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
pin_named_pins_obj_t *self = self_in;
mp_printf(print, "<Pin.%q>", self->name);
}
const mp_obj_type_t pin_board_pins_obj_type = {
{ &mp_type_type },
.name = MP_QSTR_board,
.print = pin_named_pins_obj_print,
.locals_dict = (mp_obj_t)&pin_board_pins_locals_dict,
};
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