mirror of https://github.com/arendst/Tasmota.git
94 lines
1.5 KiB
C
94 lines
1.5 KiB
C
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/*
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* File: spi.h
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* Author: Purinda Gunasekara <purinda@gmail.com>
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*
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* Created on 24 June 2012, 11:00 AM
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*/
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#ifndef SPI_H
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#define SPI_H
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/**
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* @file spi.h
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* \cond HIDDEN_SYMBOLS
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* Class declaration for SPI helper files
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*/
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/**
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* Example GPIO.h file
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*
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* @defgroup SPI SPI Example
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*
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* See RF24_arch_config.h for additional information
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* @{
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*/
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#include <inttypes.h>
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#include <stdexcept>
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#ifndef RF24_SPIDEV_SPEED
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/* 8MHz as default */
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#define RF24_SPIDEV_SPEED 8000000
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#endif
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/** Specific excpetion for SPI errors */
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class SPIException : public std::runtime_error {
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public:
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explicit SPIException(const std::string& msg) : std::runtime_error(msg) { }
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};
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class SPI {
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public:
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/**
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* SPI constructor
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*/
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SPI();
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/**
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* Start SPI
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*/
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void begin(int busNo,uint32_t spi_speed=RF24_SPIDEV_SPEED);
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/**
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* Transfer a single byte
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* @param tx Byte to send
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* @return Data returned via spi
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*/
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uint8_t transfer(uint8_t tx);
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/**
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* Transfer a buffer of data
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* @param tbuf Transmit buffer
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* @param rbuf Receive buffer
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* @param len Length of the data
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*/
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void transfernb(char* tbuf, char* rbuf, uint32_t len);
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/**
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* Transfer a buffer of data without an rx buffer
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* @param buf Pointer to a buffer of data
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* @param len Length of the data
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*/
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void transfern(char* buf, uint32_t len) {
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transfernb(buf, buf, len);
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}
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~SPI();
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private:
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int fd;
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uint32_t _spi_speed;
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void init(uint32_t spi_speed=RF24_SPIDEV_SPEED);
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};
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/**
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* \endcond
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*/
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/*@}*/
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#endif /* SPI_H */
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