134 lines
2.6 KiB
C++
134 lines
2.6 KiB
C++
/*
|
|
* spieeprom.cpp - library for SPI EEPROM IC's
|
|
* https://bitbucket.org/trunet/spieeprom/
|
|
*
|
|
* This library is based on code by Heather Dewey-Hagborg
|
|
* available on http://www.arduino.cc/en/Tutorial/SPIEEPROM
|
|
*
|
|
* by Wagner Sartori Junior <wsartori@gmail.com>
|
|
*/
|
|
|
|
//#include <WProgram.h>
|
|
#include "spieeprom.h"
|
|
#include <SPI.h>
|
|
|
|
|
|
SPIEEPROM::SPIEEPROM() {
|
|
eeprom_type = 0;
|
|
address = 0;
|
|
}
|
|
|
|
SPIEEPROM::SPIEEPROM(byte type) {
|
|
if (type>1) {
|
|
eeprom_type = 0;
|
|
} else {
|
|
eeprom_type = type;
|
|
}
|
|
address = 0;
|
|
}
|
|
|
|
void SPIEEPROM::setup() {
|
|
pinMode(SLAVESELECT, OUTPUT);
|
|
SPI.begin();
|
|
}
|
|
|
|
void SPIEEPROM::send_address(long addr) {
|
|
if (eeprom_type == 1) {
|
|
SPI.transfer((byte)(addr>>16));
|
|
}
|
|
SPI.transfer((byte)(addr>>8));
|
|
SPI.transfer((byte)(addr));
|
|
}
|
|
|
|
void SPIEEPROM::start_write() {
|
|
digitalWrite(SLAVESELECT,LOW);
|
|
SPI.transfer(WREN); //send WREN command
|
|
digitalWrite(SLAVESELECT,HIGH);
|
|
digitalWrite(SLAVESELECT,LOW);
|
|
SPI.transfer(WRITE); //send WRITE command
|
|
}
|
|
|
|
bool SPIEEPROM::isWIP() {
|
|
byte data;
|
|
|
|
digitalWrite(SLAVESELECT,LOW);
|
|
SPI.transfer(RDSR); // send RDSR command
|
|
|
|
data = SPI.transfer(0xFF); //get data byte
|
|
|
|
digitalWrite(SLAVESELECT,HIGH);
|
|
|
|
return (data & (1 << 0));
|
|
}
|
|
|
|
void SPIEEPROM::write(long addr, byte data) {
|
|
start_write();
|
|
|
|
send_address(addr); // send address
|
|
SPI.transfer(data); // transfer data
|
|
|
|
digitalWrite(SLAVESELECT,HIGH);
|
|
|
|
while (isWIP()) {
|
|
delay(1);
|
|
}
|
|
}
|
|
|
|
void SPIEEPROM::write(long addr, byte data[], int arrLength) {
|
|
start_write();
|
|
|
|
send_address(addr); // send address
|
|
|
|
for (int i=0;i<arrLength;i++) {
|
|
SPI.transfer(data[i]); // transfer data
|
|
}
|
|
|
|
digitalWrite(SLAVESELECT,HIGH);
|
|
while (isWIP()) {
|
|
delay(1);
|
|
}
|
|
}
|
|
|
|
void SPIEEPROM::write(long addr, char data[], int arrLength) {
|
|
start_write();
|
|
|
|
send_address(addr); // send address
|
|
|
|
for (int i=0;i<arrLength;i++) {
|
|
SPI.transfer(data[i]); // transfer data
|
|
}
|
|
|
|
digitalWrite(SLAVESELECT,HIGH);
|
|
while (isWIP()) {
|
|
delay(1);
|
|
}
|
|
}
|
|
|
|
byte SPIEEPROM::read_byte(long addr) {
|
|
byte data;
|
|
|
|
digitalWrite(SLAVESELECT,LOW);
|
|
SPI.transfer(READ); // send READ command
|
|
|
|
send_address(addr); // send address
|
|
data = SPI.transfer(0xFF); //get data byte
|
|
|
|
digitalWrite(SLAVESELECT,HIGH); //release chip, signal end transfer
|
|
|
|
return data;
|
|
}
|
|
|
|
char SPIEEPROM::read_char(long addr) {
|
|
char data;
|
|
|
|
digitalWrite(SLAVESELECT,LOW);
|
|
SPI.transfer(READ); // send READ command
|
|
|
|
send_address(addr); // send address
|
|
data = SPI.transfer(0xFF); //get data byte
|
|
|
|
digitalWrite(SLAVESELECT,HIGH); //release chip, signal end transfer
|
|
return data;
|
|
}
|
|
|