//read a byte from the eeprom
BYTE readEEPROM(BYTE address){
i2cStart(I2C2);
i2cSendByte(I2C2, 0x50 << 1);
i2cSendByte(I2C2, (address & 0xFF00)>> 8);
i2cSendByte(I2C2, address & 0xFF);
i2cRepeatedStart(I2C2);
i2cSendByte(I2C2, 0x50 << 1 | 0x01);
BYTE temp = i2cRecieveByte(I2C2, FALSE);
i2cStop(I2C2);
return temp;
}
//Need to implement a check here so that it doesn't get stuck if the PSOC isn't attached
void PSOC_Read(){
//First 12 bytes are current sensor data, next 8 bytes are shock pots
BYTE PSOC_Data[24];
int i;
i2cStart(I2C1);
i2cSendByte(I2C1, (0x08 << 1) + 0) ;//send addresss and write
i2cSendByte(I2C1, 0x00);//send data pointer
i2cRepeatedStart(I2C1); //Repeat start to change data direction
// i2cStart(I2C1);
i2cSendByte(I2C1, (0x08 << 1) + 1) ;//send addresss and read
for(i = 0 ; i < 23; i++){
PSOC_Data[i] = i2cRecieveByte(I2C1, TRUE);
}
PSOC_Data[23] = i2cRecieveByte(I2C1, FALSE);
i2cStop(I2C1);//Stop the bus
//Combine the bytes
for(i = 0; i<12; i++){
PSOC_volts[i] = (PSOC_Data[2*i+1] <<8 | PSOC_Data[2*i]);
}
}
//read multiple bytes from the eeprom
BOOL readMultiEEPROM(BYTE address, BYTE *data, int length){
BOOL keepReading = TRUE;
i2cStart(I2C2);
i2cSendByte(I2C2, 0x50 << 1);
i2cSendByte(I2C2, (address & 0xFF00)>> 8);
i2cSendByte(I2C2, address & 0xFF);
i2cRepeatedStart(I2C2);
i2cSendByte(I2C2, 0x50 << 1 | 0x01);
int i;
for(i = 0; i < length-1; i++){
*(data + i) = i2cRecieveByte(I2C2, TRUE);
if(*(data+i) == 0xFF){
keepReading = FALSE;
}
if(keepReading == FALSE){
*(data +i) = 0xFF;
}
}
*(data + length - 1) = i2cRecieveByte(I2C2, FALSE);
i2cStop(I2C2);
return keepReading;
}
/**
* Liest Daten von einem I2C-Gerät dass zusätzlich ein
* Befehls-Byte benötigt.
*
* @param [in] adr
* die I2C-Adresse des gewünschten Gerätes
* @param [in] cmd
* der gewünschte Befehl (Laut Datenblatt vom Slave)
* @param [out] data
* die zu sendenden Daten
* @param [in] length
* die Anzahl Bytes, die gesendet werden.
*
* @return
* EC_SUCCESS falls der Slave immer mit ACK geantwortet hat
* EC_I2C_NAK falls kein ACK empf. wurde.
* EC_I2C_NO_ANSWER falls I2C-Gerät nicht geantwortet hat
*/
tError i2cReadCmdData(uint8 adr, uint8 cmd, uint8 *data, uint8 length)
{
tError result;
// @ToDo implement function code
result = i2cStart(adr, TRUE); // init communication for write
if (result != EC_SUCCESS) {
return result;
}
result = i2cSendByte(cmd); // send the command byte
if (result != EC_SUCCESS) {
return result;
}
i2cRepeatedStart(adr, FALSE); // generate repeated start
if (result != EC_SUCCESS) {
return result;
}
i2cReceiveData(data, length); // read the data
return EC_SUCCESS;
}
