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https://github.com/RIOT-OS/RIOT.git
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63faa5f162
- nRF51: Use `uart_conf_t` for consistency with nRF52 - nRF52832: Use UARTE (UART with EasyDMA) over UART (without DMA), as done for all other nRF52 family members - use `UARTE_PRESENT` to detect whether an UARTE can be used, rather than family names
117 lines
2.9 KiB
C
117 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_nrf51
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* @{
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*
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* @file
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* @brief nRF51 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 16MHz for all NRF51x CPUs
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*/
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#define CLOCK_CORECLOCK (16000000U)
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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 SPI_SCKSEL (dev(bus)->PSELSCK)
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#define SPI_MOSISEL (dev(bus)->PSELMOSI)
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#define SPI_MISOSEL (dev(bus)->PSELMISO)
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/** @} */
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#ifndef DOXYGEN
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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 = 0x01, /**< not supported */
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I2C_SPEED_NORMAL = TWI_FREQUENCY_FREQUENCY_K100, /**< 100kbit/s */
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I2C_SPEED_FAST = TWI_FREQUENCY_FREQUENCY_K400, /**< 400kbit/s */
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I2C_SPEED_FAST_PLUS = 0x02, /**< not supported */
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I2C_SPEED_HIGH = 0x03, /**< not supported */
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} i2c_speed_t;
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/** @} */
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#endif /* ndef DOXYGEN */
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/**
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* @name Use the shared I2C functions
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* @{
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*/
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/** Use read reg function from periph common */
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#define PERIPH_I2C_NEED_READ_REG
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/** Use write reg function from periph common */
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#define PERIPH_I2C_NEED_WRITE_REG
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/** @} */
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#ifndef DOXYGEN
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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, /**< ADC resolution: 6 bit (not supported) */
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ADC_RES_8BIT = 0x00, /**< ADC resolution: 8 bit */
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ADC_RES_10BIT = 0x02, /**< ADC resolution: 10 bit */
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ADC_RES_12BIT = 0xf1, /**< ADC resolution: 12 bit (not supported) */
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ADC_RES_14BIT = 0xf2, /**< ADC resolution: 14 bit (not supported) */
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ADC_RES_16BIT = 0xf3 /**< ADC resolution: 16 bit (not supported) */
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} adc_res_t;
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/** @} */
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#endif /* ndef DOXYGEN */
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/**
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* @brief ADC configuration wrapper
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*/
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typedef gpio_t adc_conf_t;
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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_TWI_Type *dev; /**< hardware device */
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gpio_t pin_scl; /**< SCL pin */
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gpio_t pin_sda; /**< SDA pin */
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uint8_t ppi; /**< PPI channel to use */
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i2c_speed_t speed; /**< bus speed */
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} i2c_conf_t;
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/**
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* @brief SPI configuration values
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*/
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typedef struct {
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NRF_SPI_Type *dev; /**< SPI device used */
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gpio_t sclk; /**< CLK pin */
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gpio_t mosi; /**< MOSI pin */
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gpio_t miso; /**< MISO pin */
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} spi_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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