86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
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/*
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* Spi.h
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*
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* Created: 06.11.2013 15:41:34
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* Author: netz
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*/
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#ifndef SPI_H_
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#define SPI_H_
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#include <avr/io.h>
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#include <util/delay.h>
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#include "hardware/pin.hpp"
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template <typename Port, int cspin, int misopin, int mosipin, int sckpin, int mode>
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class Spi {
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public:
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Spi() {
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this->init();
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}
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void CSOn() {
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cs::make_low();
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}
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void CSOff() {
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cs::make_high();
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}
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uint8_t send(uint8_t data) {
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if(mode == 0) {
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return this->send_hard(data);
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}
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return this->send_soft(data);
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}
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uint8_t has_data() {
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return !miso::read();
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}
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private:
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const typedef avrlib::pin<Port, cspin> cs;
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const typedef avrlib::pin<Port, misopin> miso;
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const typedef avrlib::pin<Port, mosipin> mosi;
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const typedef avrlib::pin<Port, sckpin> sck;
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void init() {
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this->init_port();
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if(mode == 0) {
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this->init_spi();
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}
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}
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void init_port() {
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mosi::make_low(); //output und low;
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sck::make_low(); //output und low;
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cs::make_high(); //output und low;
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miso::make_input(); //input und low;
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}
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void init_spi() {
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SPCR = (1<<SPE) | (1<<MSTR);
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SPSR = (1<<SPI2X);
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}
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uint8_t send_soft(uint8_t data) {
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uint8_t datain=0;
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for (uint8_t i=0; i<8; i++)
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{
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if (data & 0x80) {
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mosi::make_high();
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}
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else {
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mosi::make_low();
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}
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datain <<= 1;
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if(miso::read()) {
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datain |= 1;
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}
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sck::make_high();
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data<<=1;
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_delay_us(0.3);
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sck::make_low();
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}
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return datain;
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}
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uint8_t send_hard(uint8_t data) {
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SPDR = data; // Sendet ein Byte
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loop_until_bit_is_set(SPSR, SPIF); // Wartet bis Byte gesendet wurde
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return SPDR;
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}
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};
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#endif /* SPI_H_ */
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