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107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/*
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* Copyright (C) 2015-2017 Freie Universität Berlin
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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_nrf52
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* @{
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*
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* @file
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* @brief nRF52 specific definitions for handling peripherals
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.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 System core clock speed, fixed to 64MHz for all NRF52x CPUs
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*/
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#define CLOCK_CORECLOCK (64000000U)
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/**
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* @brief Redefine some peripheral names to unify them between nRF51 and 52
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* @{
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*/
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#define UART_IRQN (UARTE0_UART0_IRQn)
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#define SPI_SCKSEL (dev(bus)->PSEL.SCK)
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#define SPI_MOSISEL (dev(bus)->PSEL.MOSI)
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#define SPI_MISOSEL (dev(bus)->PSEL.MISO)
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/** @} */
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/**
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* @brief The nRF52 family of CPUs provides a fixed number of 9 ADC lines
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*/
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#define ADC_NUMOF (9U)
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/**
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* @brief nRF52 specific naming of ADC lines (for convenience)
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*/
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enum {
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NRF52_AIN0 = 0, /**< Analog Input 0 */
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NRF52_AIN1 = 1, /**< Analog Input 1 */
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NRF52_AIN2 = 2, /**< Analog Input 2 */
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NRF52_AIN3 = 3, /**< Analog Input 3 */
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NRF52_AIN4 = 4, /**< Analog Input 4 */
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NRF52_AIN5 = 5, /**< Analog Input 5 */
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NRF52_AIN6 = 6, /**< Analog Input 6 */
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NRF52_AIN7 = 7, /**< Analog Input 7 */
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NRF52_VDD = 8, /**< VDD, not useful if VDD is reference... */
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};
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/**
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* @brief Override ADC resolution values
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* @{
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*/
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#define HAVE_ADC_RES_T
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typedef enum {
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ADC_RES_6BIT = 0xf0, /**< not supported by hardware */
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ADC_RES_8BIT = 0x00, /**< ADC resolution: 8 bit */
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ADC_RES_10BIT = 0x01, /**< ADC resolution: 10 bit */
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ADC_RES_12BIT = 0x02, /**< ADC resolution: 12 bit */
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ADC_RES_14BIT = 0xf1, /**< supported with oversampling, not implemented */
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ADC_RES_16BIT = 0xf2 /**< not supported by hardware */
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} adc_res_t;
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/** @} */
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/**
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* @brief Override I2C speed settings
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* @{
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*/
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#define HAVE_I2C_SPEED_T
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typedef enum {
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I2C_SPEED_LOW = 0xff, /**< not supported */
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I2C_SPEED_NORMAL = TWIM_FREQUENCY_FREQUENCY_K100, /**< 100kbit/s */
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I2C_SPEED_FAST = TWIM_FREQUENCY_FREQUENCY_K400, /**< 400kbit/s */
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I2C_SPEED_FAST_PLUS = 0xfe, /**< not supported */
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I2C_SPEED_HIGH = 0xfd, /**< not supported */
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} i2c_speed_t;
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/** @} */
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/**
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* @brief I2C (TWI) configuration options
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*/
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typedef struct {
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NRF_TWIM_Type *dev; /**< TWIM hardware device */
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uint8_t scl; /**< SCL pin */
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uint8_t sda; /**< SDA pin */
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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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