hi, I am trying to built the bootloader by ISO15765 base on the MC9S12XDP512 .
I had load a demo from freescale ,but find some "odd" questions:
1)when the ECU running in the BDM debug, it is correct to write/read the flash ---I can write the data to the flash and read the right back.
2)when the ECU running without BDM,it is wrong to write/read the flash ----when I read the flash that had been write ,it respone 0xFF ,not the data I had write.
I don't know what's wrong on my code, the MC9S12XDP512 bootloader demo is "XDP512-FLASH-EW-CW47" .
please help me to find what's wrong