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Started implementing EEPROM writer/reader for AT28C256.

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Marvin Blum
2022-07-29 14:53:43 +02:00
parent ac69187b5f
commit 7a476f3180
8 changed files with 77 additions and 36 deletions
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38
rf24/rf24.c
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@@ -1,10 +1,8 @@
#include <util/delay.h>
#include "rf24.h"
#include "nRF24L01.h"
#include "../ard/pins.h"
// FIXME for testing, remove later
#include <util/delay.h>
#define CONFIG_CRC (1<<EN_CRC)|(0<<CRCO)
unsigned char _ce, _csn, _sck, _mo, _mi, _irq, _payload_len;
@@ -15,7 +13,7 @@ unsigned char rf24_fifo_empty();
void rf24_serial_transmit(unsigned char*, unsigned char);
unsigned char rf24_serial_write(unsigned char);
void rf24_init(unsigned char ce, unsigned char csn, unsigned char sck, unsigned char mo, unsigned char mi, unsigned char irq){
void rf24_init(unsigned char ce, unsigned char csn, unsigned char sck, unsigned char mo, unsigned char mi, unsigned char irq) {
pin_mode(ce, OUTPUT);
digital_write(ce, LOW); // disable
pin_mode(csn, OUTPUT);
@@ -34,7 +32,7 @@ void rf24_init(unsigned char ce, unsigned char csn, unsigned char sck, unsigned
}
// channel in 1Mhz steps
void rf24_config(unsigned char channel, unsigned char payload_len){
void rf24_config(unsigned char channel, unsigned char payload_len) {
_payload_len = payload_len;
rf24_config_register(RF_CH, channel&RF_CH_MASK); // 2.4Ghz + channel*1Mhz
@@ -58,14 +56,14 @@ void rf24_config(unsigned char channel, unsigned char payload_len){
rf24_rx();
}
void rf24_rx_addr(unsigned char* addr){
void rf24_rx_addr(unsigned char* addr) {
digital_write(_csn, LOW);
rf24_serial_write(W_REGISTER|RX_ADDR_P1); // data pipe
rf24_serial_transmit(addr, 5);
digital_write(_csn, HIGH);
}
void rf24_tx_addr(unsigned char* addr){
void rf24_tx_addr(unsigned char* addr) {
digital_write(_csn, LOW);
rf24_serial_write(W_REGISTER|RX_ADDR_P0); // auto ACK pipe address must match...
rf24_serial_transmit(addr, 5);
@@ -76,7 +74,7 @@ void rf24_tx_addr(unsigned char* addr){
digital_write(_csn, HIGH);
}
void rf24_rx(){
void rf24_rx() {
digital_write(_csn, LOW);
rf24_serial_write(FLUSH_RX);
digital_write(_csn, HIGH);
@@ -88,17 +86,17 @@ void rf24_rx(){
digital_write(_ce, HIGH);
}
void rf24_tx(){
void rf24_tx() {
rf24_config_register(STATUS, (1<<RX_DR)|(1<<TX_DS)|(1<<MAX_RT));
rf24_config_register(CONFIG, CONFIG_CRC|(1<<PWR_UP)|(0<<PRIM_RX));
}
void rf24_power_down(){
void rf24_power_down() {
digital_write(_ce, LOW);
rf24_config_register(CONFIG, CONFIG_CRC);
}
void rf24_send(unsigned char* data){
void rf24_send(unsigned char* data) {
digital_write(_ce, LOW);
rf24_tx();
digital_write(_csn, LOW);
@@ -111,12 +109,12 @@ void rf24_send(unsigned char* data){
digital_write(_ce, HIGH);
}
unsigned char rf24_is_sending(){
unsigned char rf24_is_sending() {
unsigned char status = rf24_status();
return !(status&((1<<TX_DS)|(1<<MAX_RT)));
}
unsigned char rf24_data_ready(){
unsigned char rf24_data_ready() {
unsigned char status = rf24_status();
if(status&(1<<RX_DR)){
@@ -126,7 +124,7 @@ unsigned char rf24_data_ready(){
return !rf24_fifo_empty();
}
void rf24_get_data(unsigned char* data){
void rf24_get_data(unsigned char* data) {
digital_write(_csn, LOW);
rf24_serial_write(R_RX_PAYLOAD);
unsigned char i = 0;
@@ -139,21 +137,21 @@ void rf24_get_data(unsigned char* data){
rf24_config_register(STATUS, 1<<RX_DR);
}
unsigned char rf24_status(){
unsigned char rf24_status() {
digital_write(_csn, LOW);
unsigned char status = rf24_serial_write(NOP); // returns STATUS register
digital_write(_csn, HIGH);
return status;
}
void rf24_config_register(unsigned char reg, unsigned char value){
void rf24_config_register(unsigned char reg, unsigned char value) {
digital_write(_csn, LOW);
rf24_serial_write(W_REGISTER|(reg&REG_MASK));
rf24_serial_write(value);
digital_write(_csn, HIGH);
}
unsigned char rf24_read_register(unsigned char reg){
unsigned char rf24_read_register(unsigned char reg) {
digital_write(_csn, LOW);
rf24_serial_write(R_REGISTER|(reg&REG_MASK));
unsigned char data = rf24_serial_write(NOP);
@@ -161,12 +159,12 @@ unsigned char rf24_read_register(unsigned char reg){
return data;
}
unsigned char rf24_fifo_empty(){
unsigned char rf24_fifo_empty() {
unsigned char fifo = rf24_read_register(FIFO_STATUS);
return fifo&(1<<RX_EMPTY);
}
void rf24_serial_transmit(unsigned char* data, unsigned char len){
void rf24_serial_transmit(unsigned char* data, unsigned char len) {
unsigned char i = 0;
for(i = 0; i < len; i++){
@@ -174,7 +172,7 @@ void rf24_serial_transmit(unsigned char* data, unsigned char len){
}
}
unsigned char rf24_serial_write(unsigned char data){
unsigned char rf24_serial_write(unsigned char data) {
digital_write(_sck, LOW); // clock
unsigned char i = 0, rx = 0;