periph_cpu.h File Reference

CPU specific definitions for internal peripheral handling. More...

Detailed Description

CPU specific definitions for internal peripheral handling.

Author

Hauke Petersen hauke.nosp@m..pet.nosp@m.ersen.nosp@m.@fu-.nosp@m.berli.nosp@m.n.de

Definition in file periph_cpu.h.

#include "periph_conf.h"
#include <linux/gpio.h>

Include dependency graph for periph_cpu.h:

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Macros
#define	PERIPH_TIMER_PROVIDES_SET
	Prevent shared timer functions from being used.

GPIO Configuration
Length of the CPU_ID in octets
#define	GPIO_PORT_SHIFT   (24)
	The offset between Port and Pin.
#define	GPIO_PIN(port, pin)   (gpio_t)((port << GPIO_PORT_SHIFT) | pin)
	Define a custom GPIO_PIN macro for native.
#define	HAVE_GPIO_MODE_T
#define	GPIOHANDLE_REQUEST_PULL_DOWN   (0xFF)
#define	GPIOHANDLE_REQUEST_PULL_UP   (0xFF)
#define	HAVE_GPIO_FLANK_T
enum	gpio_mode_t {   GPIO_IN = GPIOHANDLE_REQUEST_INPUT, GPIO_IN_PD = GPIOHANDLE_REQUEST_INPUT | GPIOHANDLE_REQUEST_PULL_DOWN, GPIO_IN_PU = GPIOHANDLE_REQUEST_INPUT | GPIOHANDLE_REQUEST_PULL_UP, GPIO_OUT = GPIOHANDLE_REQUEST_OUTPUT,   GPIO_OD = GPIOHANDLE_REQUEST_OPEN_DRAIN, GPIO_OD_PU = GPIOHANDLE_REQUEST_OPEN_DRAIN | GPIOHANDLE_REQUEST_PULL_UP, GPIO_IN, GPIO_IN_PD,   GPIO_IN_PU, GPIO_OUT, GPIO_OD, GPIO_OD_PU }
	Available pin modes. More...
enum	gpio_flank_t {   GPIO_FALLING = GPIOEVENT_EVENT_FALLING_EDGE, GPIO_RISING = GPIOEVENT_EVENT_RISING_EDGE, GPIO_BOTH = GPIO_FALLING | GPIO_RISING, GPIO_FALLING = 0,   GPIO_RISING = 1, GPIO_BOTH = 2 }

SPI Configuration
#define	PERIPH_SPI_NEEDS_TRANSFER_BYTE
	Use the common transfer_byte SPI function.
#define	PERIPH_SPI_NEEDS_TRANSFER_REG
	Use the common transfer_reg SPI function.
#define	PERIPH_SPI_NEEDS_TRANSFER_REGS
	Use the common transfer_regs SPI function.

EEPROM configuration
#define	EEPROM_SIZE   (1024U) /* 1kB */

Enumeration Type Documentation

gpio_flank_t

enum gpio_flank_t

Enumerator
GPIO_FALLING	emit interrupt on falling flank
GPIO_RISING	emit interrupt on rising flank
GPIO_BOTH	emit interrupt on both flanks
GPIO_FALLING	emit interrupt on falling flank
GPIO_RISING	emit interrupt on rising flank
GPIO_BOTH	emit interrupt on both flanks

Definition at line 80 of file periph_cpu.h.

gpio_mode_t

enum gpio_mode_t

Available pin modes.

Generally, a pin can be configured to be input or output. In output mode, a pin can further be put into push-pull or open drain configuration. Though this is supported by most platforms, this is not always the case, so driver implementations may return an error code if a mode is not supported.

Enumerator
GPIO_IN	configure as input without pull resistor
GPIO_IN_PD	configure as input with pull-down resistor
GPIO_IN_PU	configure as input with pull-up resistor
GPIO_OUT	configure as output in push-pull mode
GPIO_OD	configure as output in open-drain mode without pull resistor
GPIO_OD_PU	configure as output in open-drain mode with pull resistor enabled

Definition at line 70 of file periph_cpu.h.