void EEPROM::ToRam(void * startAddr, void * endAddr, int eeStart)
{
//Copy from EEPROM beginning at eeStart address to startAddr..endAddr in main RAM.
unsigned char * addr;
SetAddr(eeStart); //Set EEPROM's address pointer
i2cStart();
SendByte(0xA1); //EEPROM I2C address + read operation
if(startAddr == endAddr) {
addr = (unsigned char *)startAddr;
}
else {
addr = (unsigned char *)startAddr;
while( addr != ((unsigned char *)endAddr) ) //Main RAM index startAddr to endAddr
{
*addr++ = GetByte(); //GetByte byte from EEPROM & copy to RAM
SendAck(ACK); //Acknowledge byte received
}
}
*addr = GetByte(); //GetByte byte from EEPROM & copy to RAM
SendAck(NACK);
i2cRelease(); //Stop sequential read
}
void EEPROM::FromRam(void * startAddr, void * endAddr, int eeStart)
{
unsigned char * addr;
unsigned char * page;
//Copy startAddr..endAddr from main RAM to EEPROM beginning at eeStart address.
addr = (unsigned char *)startAddr; //Initialize main RAM index
int eeAddr = eeStart; //Initialize EEPROM index
do {
page = addr+64 - eeAddr%64; //Find next EEPROM page boundary
if( page > (unsigned char*)endAddr+1) {
page = (unsigned char *)endAddr+1;
}
SetAddr(eeAddr); //Give EEPROM starting address
do { //Bytes -> EEPROM until page boundary
SendByte(*addr++);
} while(addr != page);
i2cRelease(); //From 24LC256's page buffer -> EEPROM
eeAddr = (int)addr - (int)startAddr+eeStart; //Next EEPROM starting address
} while( addr <= endAddr ); //Quit when RAM index > end address
}
TwoWire::~TwoWire()
{
flush();
if(i2c) {
i2cRelease(i2c);
i2c=NULL;
}
}
static portTASK_FUNCTION(readTemp, args) {
while (1) {
i2cAcquire(DS3232_I2C_ADDRESS);
i2cSend(0x11);
unsigned char tempMSB = i2cReceive(I2C_ACK);
unsigned char tempLSB = i2cReceive(I2C_NACK) >> 6;
i2cRelease();
printf("Temp %d.%d C\n", tempMSB, 25 * tempLSB);
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}
