periph_cpu.h
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/*
* Copyright (C) 2015-2016 Freie Universität Berlin
* Copyright (C) 2015 Hamburg University of Applied Sciences
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup cpu_stm32l1
* @{
*
* @file
* @brief CPU specific definitions for internal peripheral handling
*
* @author Hauke Petersen <hauke.peterse@fu-berlin.de>
* @author Katja Kirstein <katja.kirstein@haw-hamburg.de>
*/
#ifndef PERIPH_CPU_H
#define PERIPH_CPU_H
#include "periph_cpu_common.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Generate GPIO mode bitfields
*
* We use 5 bit to encode the mode:
* - bit 0+1: pin mode (input / output)
* - bit 2+3: pull resistor configuration
* - bit 4: output type (0: push-pull, 1: open-drain)
*/
#define GPIO_MODE(io, pr, ot) ((io << 0) | (pr << 2) | (ot << 4))
#ifndef DOXYGEN
/**
* @brief Override GPIO mode options
* @{
*/
#define HAVE_GPIO_MODE_T
typedef enum {
GPIO_IN = GPIO_MODE(0, 0, 0), /**< input w/o pull R */
GPIO_IN_PD = GPIO_MODE(0, 2, 0), /**< input with pull-down */
GPIO_IN_PU = GPIO_MODE(0, 1, 0), /**< input with pull-up */
GPIO_OUT = GPIO_MODE(1, 0, 0), /**< push-pull output */
GPIO_OD = GPIO_MODE(1, 0, 1), /**< open-drain w/o pull R */
GPIO_OD_PU = GPIO_MODE(1, 1, 1) /**< open-drain with pull-up */
} gpio_mode_t;
/** @} */
#endif /* ndef DOXYGEN */
/**
* @brief Available ports on the STM32L1 family
*/
enum {
PORT_A = 0, /**< port A */
PORT_B = 1, /**< port B */
PORT_C = 2, /**< port C */
PORT_D = 3, /**< port D */
PORT_E = 4, /**< port E */
PORT_F = 6, /**< port F */
PORT_G = 7, /**< port G */
PORT_H = 5, /**< port H */
};
/**
* @brief DAC line configuration data
*/
typedef struct {
gpio_t pin; /**< pin connected to the line */
uint8_t chan; /**< DAC device used for this line */
} dac_conf_t;
/**
* @brief Configure the alternate function for the given pin
*
* @note This is meant for internal use in STM32L1 peripheral drivers only
*
* @param[in] pin pin to configure
* @param[in] af alternate function to use
*/
void gpio_init_af(gpio_t pin, gpio_af_t af);
/**
* @brief I2C configuration data structure
*/
typedef struct {
I2C_TypeDef *dev; /**< i2c device */
gpio_t scl; /**< scl pin number */
gpio_t sda; /**< sda pin number */
gpio_mode_t pin_mode; /**< with or without pull resistor */
gpio_af_t af; /**< I2C alternate function value */
uint8_t er_irqn; /**< error IRQ */
uint8_t ev_irqn; /**< event IRQ */
} i2c_conf_t;
#ifdef __cplusplus
}
#endif
#endif /* PERIPH_CPU_H */
/** @} */