Hi,
I've got a bootloader for the pic18f - The following function is ok for the pic18f8722 i'm using to write to prog memory.
//load the holding registers for (counter = 0; counter < uBOOTDIn.BiFWLen; counter++) {
*((BiADR.pAdr)+counter) = uBOOTDIn.BiFWData[counter]; } //first we fill the required holding registers StartWrite(); while(EECON1_WR); //Wait till WR bit is clear
Where, BiFWLen is the length of the data to write to - usually 16 bytes. The 8722 has a holding reg of 64 bytes - so no problem. But the pic18f452 has a holding reg of only 8 bytes so any ideas? I've tried :
if (uBOOTDIn.BiFWLen>8) { //load the holding registers for (counter = 0; counter < 8; counter++) { *((BiADR.pAdr)+counter) = uBOOTDIn.BiFWData[counter]; } //first we fill the required holding registers StartWrite(); while(EECON1_WR); //Wait till WR bit is clear
for (counter = 8; counter < uBOOTDIn.BiFWLen; counter++) { *((BiADR.pAdr)+counter) = uBOOTDIn.BiFWData[counter]; } //first we fill the required holding registers StartWrite(); while(EECON1_WR); //Wait till WR bit is clear }
But the problem is that when i check the program memory - the data is not written to the correct address locations only on the pic18f452 ???? ?
This doesn't make sense - the issue only occurs on the 452 even with data