Hi all,
I'm trying to interfacing the 24LC64 EEPROM to my FRDM KL25-Z. I'm using the MQX Lite and CW 10.6 (just for you know).
My first try was follow the code from Driver for Microchip 24xx Serial EEPROM | MCU on Eclipse , but unfortunately I'm unable to follow the code and build my own driver.
I'm trying to do this because I should have control about the blocking routines (like delays and waits), due to a lot of data processing at this same project, like PIT triggering a data logger (for example).
So, I've tried to write this:
byte buffer[3];
word sent;
byte data;
byte err;
//WRITE DATA
i2c_end = 0; //Variable is setting at CI2C1_OnReceiveData event
err = CI2C1_SelectSlave(0x50); //Select address of the EEPROM device (not required if only one device on the bus)
buffer[0] = 0; //most significant byte of storage address
buffer[1] = 0x12; //least significant byte of storage address
buffer[2] = 0xA8; //data
err = CI2C1_SendBlock(buffer, 3, &sent); //send storage address and data to the EEPROM
while(!i2c_end){} //wait for communication completition
err = CI2C1_SendStop(); //Send STOP condition
//10ms delay for EEPROM to complete write cycle - for more details see EEPROM datasheet
delay_ms(10); //#define delay_ms(x) _time_delay_ticks(((x)/SYST_TICK_TIME));
//READ DATA
i2c_end = 0;
buffer[0] = 0; //most significant byte of storage address
buffer[1] = 0x12; //least significant byte of storage address
err = CI2C1_SendBlock(buffer, 2, &sent); //send address to the EEPROM
while(!i2c_end){}
i2c_end = 0;
err = CI2C1_RecvChar(&data); //read data from EEPROM
while(!i2c_end){}
err = data;
But DATA is returning the value 0xFF (what I think is a error?).
Can anyone help?
Regards,
