mirror of
https://github.com/Kugelschieber/arduino-c.git
synced 2026-01-18 11:00:26 +00:00
90 lines
1.5 KiB
C
90 lines
1.5 KiB
C
#include "rf24.h"
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#include "../ard/pins.h"
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// CE = standby mode, CSN = SPI chip select
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char payload_len, spi_ce, spi_csn, spi_sck, spi_mosi, spi_miso;
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void reg_write(unsigned char, unsigned char);
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void spi_transfer(unsigned char);
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void rf24_init(unsigned char payload_length,
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unsigned char channel,
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unsigned char ce,
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unsigned char csn,
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unsigned char sck,
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unsigned char mosi,
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unsigned char miso){
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if(payload_length > 32){
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payload_length = 32;
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}
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payload_len = payload_length;
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spi_ce = ce;
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spi_csn = csn;
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spi_sck = sck;
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spi_mosi = mosi;
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spi_miso = miso;
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pin_mode(spi_ce, OUTPUT);
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pin_mode(spi_csn, OUTPUT);
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pin_mode(spi_sck, OUTPUT);
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pin_mode(spi_mosi, OUTPUT);
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pin_mode(spi_miso, INPUT);
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digital_write(spi_ce, LOW);
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digital_write(spi_csn, HIGH);
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reg_write(RF_CH, channel);
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}
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void rf24_tx_addr(unsigned char* addr){
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}
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void rf24_rx_addr(unsigned char* addr){
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}
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void rf24_send(char* data){
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}
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void rf24_receive(char* data){
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}
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void reg_write(unsigned char reg, unsigned char value){
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digital_write(spi_csn, LOW);
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spi_transfer(W_REGISTER|(REGISTER_MASK®));
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spi_transfer(value);
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digital_write(spi_csn, HIGH);
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}
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void spi_transfer(unsigned char data){
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unsigned char i = 0;
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unsigned char rx = 0;
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digital_write(spi_sck, LOW); // clock
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for(i = 0; i < 8; i++){
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// tx
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if(data&(1<<(7-i))){
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digital_write(spi_mosi, HIGH);
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}
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else{
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digital_write(spi_mosi, LOW);
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}
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digital_write(spi_sck, HIGH); // clock
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// rx
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rx <<= 1;
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if(digital_read(spi_miso) == HIGH){
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rx |= 0x01;
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}
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digital_write(spi_sck, LOW); // clock
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}
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}
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