/**
* Read bytes from the EEPROM using sequential read.
*/
void
eeprom_read(unsigned short addr, unsigned char *buf, int size)
{
unsigned int i;
if(size <= 0) {
return;
}
do {
/* Wait if the writecycle has not finished. */
start();
/* 1010 control, 000 address, 0=write --- but only inits address */
} while(!write_bus(0xa0 | EEPROMADDRESS));
/* Write address to bus, low byte first. */
write_bus(addr >> 8);
write_bus(addr & 0xff);
start();
/* 1010 control, 000 address, 1=read */
write_bus(0xa1 | EEPROMADDRESS);
for(i = 0; i < (size - 1); ++i){
buf[i] = read_bus(1);
}
buf[size - 1] = read_bus(0);
stop();
}
static volatile boolean rwbit(boolean w) {
boolean a,b;
set_bus(!w);
delayMicroseconds(UNIO_QUARTER_BIT);
a=read_bus();
delayMicroseconds(UNIO_QUARTER_BIT);
set_bus(w);
delayMicroseconds(UNIO_QUARTER_BIT);
b=read_bus();
delayMicroseconds(UNIO_QUARTER_BIT);
return b&&!a;
}
