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146 lines
4.3 KiB
C
146 lines
4.3 KiB
C
/*
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* Copyright (C) 2015-2016 Freie Universität Berlin
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* Copyright (C) 2015 Hamburg University of Applied Sciences
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_stm32l1
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* @{
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*
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* @file
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* @brief CPU specific definitions for internal peripheral handling
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*
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* @author Hauke Petersen <hauke.peterse@fu-berlin.de>
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* @author Katja Kirstein <katja.kirstein@haw-hamburg.de>
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*/
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#ifndef PERIPH_CPU_H
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#define PERIPH_CPU_H
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#include "periph_cpu_common.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Overwrite the default gpio_t type definition
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* @{
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*/
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#define HAVE_GPIO_T
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typedef uint32_t gpio_t;
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/** @} */
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/**
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* @brief Definition of a fitting UNDEF value
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*/
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#define GPIO_UNDEF (0xffffffff)
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/**
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* @brief Define a CPU specific GPIO pin generator macro
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*/
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#define GPIO_PIN(x, y) ((GPIOA_BASE + (x << 10)) | y)
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/**
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* @brief Generate GPIO mode bitfields
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*
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* We use 5 bit to encode the mode:
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* - bit 0+1: pin mode (input / output)
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* - bit 2+3: pull resistor configuration
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* - bit 4: output type (0: push-pull, 1: open-drain)
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*/
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#define GPIO_MODE(io, pr, ot) ((io << 0) | (pr << 2) | (ot << 4))
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/**
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* @brief Override GPIO mode options
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* @{
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*/
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#define HAVE_GPIO_MODE_T
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typedef enum {
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GPIO_IN = GPIO_MODE(0, 0, 0), /**< input w/o pull R */
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GPIO_IN_PD = GPIO_MODE(0, 2, 0), /**< input with pull-down */
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GPIO_IN_PU = GPIO_MODE(0, 1, 0), /**< input with pull-up */
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GPIO_OUT = GPIO_MODE(1, 0, 0), /**< push-pull output */
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GPIO_OD = GPIO_MODE(1, 0, 1), /**< open-drain w/o pull R */
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GPIO_OD_PU = GPIO_MODE(1, 1, 1) /**< open-drain with pull-up */
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} gpio_mode_t;
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/** @} */
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/**
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* @brief Available ports on the STM32L1 family
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*/
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enum {
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PORT_A = 0, /**< port A */
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PORT_B = 1, /**< port B */
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PORT_C = 2, /**< port C */
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PORT_D = 3, /**< port D */
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PORT_E = 4, /**< port E */
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PORT_F = 6, /**< port F */
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PORT_G = 7, /**< port G */
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PORT_H = 5, /**< port H */
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};
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/**
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* @brief Available MUX values for configuring a pin's alternate function
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*/
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typedef enum {
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GPIO_AF0 = 0, /**< use alternate function 0 */
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GPIO_AF1, /**< use alternate function 1 */
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GPIO_AF2, /**< use alternate function 2 */
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GPIO_AF3, /**< use alternate function 3 */
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GPIO_AF4, /**< use alternate function 4 */
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GPIO_AF5, /**< use alternate function 5 */
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GPIO_AF6, /**< use alternate function 6 */
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GPIO_AF7, /**< use alternate function 7 */
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GPIO_AF8, /**< use alternate function 8 */
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GPIO_AF9, /**< use alternate function 9 */
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GPIO_AF10, /**< use alternate function 10 */
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GPIO_AF11, /**< use alternate function 11 */
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GPIO_AF12, /**< use alternate function 12 */
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GPIO_AF13, /**< use alternate function 13 */
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GPIO_AF14 /**< use alternate function 14 */
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} gpio_af_t;
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/**
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* @brief Configure the alternate function for the given pin
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*
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* @note This is meant for internal use in STM32L1 peripheral drivers only
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*
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* @param[in] pin pin to configure
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* @param[in] af alternate function to use
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*/
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void gpio_init_af(gpio_t pin, gpio_af_t af);
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/**
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* @brief Timer configuration data structure
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*/
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typedef struct {
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TIM_TypeDef *dev; /**< timer device */
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uint8_t rcc; /**< bit in the RCC register */
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uint8_t irqn; /**< IRQ vector entry number */
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} timer_conf_t;
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/**
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* @brief I2C configuration data structure
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*/
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typedef struct {
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I2C_TypeDef *dev; /**< i2c device */
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gpio_t scl; /**< scl pin number */
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gpio_t sda; /**< sda pin number */
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gpio_mode_t pin_mode; /**< with or without pull resistor */
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gpio_af_t af; /**< I2C alternate function value */
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uint8_t er_irqn; /**< error IRQ */
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uint8_t ev_irqn; /**< event IRQ */
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} i2c_conf_t;
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#ifdef __cplusplus
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}
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#endif
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#endif /* PERIPH_CPU_H */
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/** @} */
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