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mbed-os/hal/pinmap.h

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/** \addtogroup hal */
/** @{*/
/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef MBED_PINMAP_H
#define MBED_PINMAP_H
#include "PinNames.h"
#include <stdbool.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
PinName pin;
int peripheral;
int function;
} PinMap;
typedef struct {
uint32_t count;
const PinName *pins;
} PinList;
typedef struct {
uint32_t count;
const int *peripheral;
} PeripheralList;
void pin_function(PinName pin, int function);
void pin_mode(PinName pin, PinMode mode);
uint32_t pinmap_peripheral(PinName pin, const PinMap *map);
uint32_t pinmap_function(PinName pin, const PinMap *map);
uint32_t pinmap_merge(uint32_t a, uint32_t b);
void pinmap_pinout(PinName pin, const PinMap *map);
uint32_t pinmap_find_peripheral(PinName pin, const PinMap *map);
uint32_t pinmap_find_function(PinName pin, const PinMap *map);
/**
* Find a combination of pins suitable for use given the constraints
*
* This function finds pins which meet these specific properties:
* - The pin is part of the form factor
* - The pin is not in the restricted list
* - The pin is contained within the respective pinmap
* - The pin belongs to the given peripheral
* - Each pin found is distinct; in the example below
* mosi and miso will never be assigned the same pin
*
* Example:
* @code
* #include "mbed.h"
* #include "pinmap.h"
*
* int main()
* {
* int per = spi_master_cs_pinmap()->peripheral;
* const PinList *pins_ff = pinmap_ff_default_pins();
* const PinList *pins_avoid = pinmap_restricted_pins();
* PinName mosi = NC;
* PinName miso = NC;
* PinName sclk = NC;
* PinName ssel = NC;
* const PinMap *maps[] = {
* spi_master_mosi_pinmap(),
* spi_master_miso_pinmap(),
* spi_master_clk_pinmap(),
* spi_master_cs_pinmap()
* };
* PinName *pins[] = {
* &mosi,
* &miso,
* &sclk,
* &ssel
* };
* if (pinmap_find_peripheral_pins(pins_ff, pins_avoid, per, maps, pins, sizeof(maps) / sizeof(maps[0]))) {
* printf("Found SPI pins to test instance %i with:\n"
* " mosi=%s\n"
* " miso=%s\n"
* " sclk=%s\n"
* " ssel=%s\n", per,
* pinmap_ff_default_pin_to_string(mosi),
* pinmap_ff_default_pin_to_string(miso),
* pinmap_ff_default_pin_to_string(sclk),
* pinmap_ff_default_pin_to_string(ssel));
* } else {
* printf("Could not find SPI combination to test %i\n", per);
* }
* return 0;
* }
* @endcode
*
* @param whitelist List of pins to choose from
* @param blacklist List of pins which cannot be used
* @param per Peripheral to which the pins belong
* @param maps An array of pin maps to select from
* @param pins An array of pins to find. Pins already set to a value will be
* left unchanged. Only pins initialized to NC will be updated by this function
* @param count The size of maps and pins
* @return true if a suitable combination of pins was found and
* written to the pins array, otherwise false
*/
bool pinmap_find_peripheral_pins(const PinList *whitelist, const PinList *blacklist, int per, const PinMap *const *maps, PinName **pins, uint32_t count);
/**
* Check if the pin is in the list
*
* @param list pin list to check
* @param pin pin to check for in the list
* @return true if the pin is in the list, false otherwise
*/
bool pinmap_list_has_pin(const PinList *list, PinName pin);
/**
* Check if the peripheral is in the list
*
* @param list peripheral list to check
* @param peripheral peripheral to check for in the list
* @return true if the peripheral is in the list, false otherwise
*/
bool pinmap_list_has_peripheral(const PeripheralList *list, int peripheral);
/**
* Get the pin list of pins to avoid during testing
*
* The restricted pin list is used to indicate to testing
* that a pin should be skipped due to some caveat about it.
* For example, using USBRX and USBTX during tests will interfere
* with the test runner and should be avoided.
*
* Targets should override the weak implementation of this
* function if they have additional pins which should be
* skipped during testing.
*
* @return Pointer to a pin list of pins to avoid
*/
const PinList *pinmap_restricted_pins(void);
/**
* Get the pin list of peripherals per interface to avoid during testing
*
* The restricted peripheral list is used to indicate to testing
* that a peripheral should be skipped due to some caveat about it.
* For example, using the USB serial port during tests will interfere
* with the test runner and should be avoided.
*
* Targets should override the weak implementation of this
* function if they have peripherals which should be
* skipped during testing.
*
* @note Restricting peripheral is at the moment available for UART
* interface only as only STDIO UART must be skipped because it is
* used by Mbed.
* Restricting peripherals for other interfaces should be added
* in the future if required.
*
* @return Pointer to a peripheral list of peripheral to avoid
*/
#if DEVICE_SERIAL
const PeripheralList *pinmap_uart_restricted_peripherals(void);
#endif
/**
* Get the pin list of pins to avoid during GPIO/GPIO_IRQ testing
*
* The GPIO restricted pin list is used to indicate to testing
* that a pin should be skipped due to some caveat about it.
*
* Targets should override the weak implementation of this
* function if they have peripherals which should be
* skipped during testing.
*
* @note This is special case only for GPIO/GPIO_IRQ tests because
* targets do not provide pin-maps for GPIO.
*
* @return Pointer to a peripheral list of peripheral to avoid
*/
const PinList *pinmap_gpio_restricted_pins(void);
#ifdef TARGET_FF_ARDUINO
/**
* Get the pin list of the Arduino form factor
*
* @return Pointer to the Arduino pin list
*/
const PinList *pinmap_ff_arduino_pins(void);
/**
* Get the string representation of a form factor pin
*
* @param pin Pin to get a string for
* @return String representing the form factor pin
*/
const char *pinmap_ff_arduino_pin_to_string(PinName pin);
/* Default to arduino form factor if unspecified */
#ifndef MBED_CONF_TARGET_DEFAULT_FORM_FACTOR
#define MBED_CONF_TARGET_DEFAULT_FORM_FACTOR arduino
#endif
#endif
#ifdef MBED_CONF_TARGET_DEFAULT_FORM_FACTOR
#define PINMAP_DEFAULT_PINS_(name) pinmap_ff_ ## name ## _pins
#define PINMAP_DEFAULT_PIN_TO_STRING_(name) pinmap_ff_ ## name ## _pin_to_string
#define PINMAP_DEFAULT_PINS(name) PINMAP_DEFAULT_PINS_(name)
#define PINMAP_DEFAULT_PIN_TO_STRING(name) PINMAP_DEFAULT_PIN_TO_STRING_(name)
#define pinmap_ff_default_pins PINMAP_DEFAULT_PINS(MBED_CONF_TARGET_DEFAULT_FORM_FACTOR)
#define pinmap_ff_default_pin_to_string PINMAP_DEFAULT_PIN_TO_STRING(MBED_CONF_TARGET_DEFAULT_FORM_FACTOR)
/**
* Get the pin list of the default form factor
*
* This is an alias to whichever form factor is set
* to be the default.
*
* @return Pointer to the default pin list
*/
const PinList *pinmap_ff_default_pins(void);
/**
* Get the string representation of a form factor pin
*
* This is an alias to whichever form factor is set
* to be the default.
*
* @param pin Pin to get a string for
* @return String representing the form factor pin
*/
const char *pinmap_ff_default_pin_to_string(PinName pin);
#endif
#ifdef __cplusplus
}
#endif
#endif
/** @}*/
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