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Cannot read EEPROM on MEGA48
The MEGA48 does not have a fuse which controls whether or not the EEPROM is erased on a chip erase command. However, there is a "mystery" fuse in the MEGA48 for which I cannot...
Thursday, 17 June 2004 - 14:18
Timer/counter ATTiny26L
You can extend the range of your 8 bit timer to 16 bits (or as many as you want) by incrementing another variable (counter) every time that your 8 bit timer overflows. If you use...
Thursday, 17 June 2004 - 12:35
Serious STK500 problem
When the programming is inconsistant, try slowing down the clock rate on the STK500 (undneath the "Board" Tab.) Setting the board frequency to 1.23MHZ solved a lot of my...
Wednesday, 16 June 2004 - 20:34
ATJTAGICE mkII (Debugwire) and EEPROM
After more experimentation, it has become clear that the ATJTAGICE mkII or Studio 4.09 is erasing the EEPROM when it's connected and uploading new code to the target device...
Wednesday, 16 June 2004 - 20:06
Cannot read EEPROM on MEGA48
After more experimentation, it has become clear that the ATJTAGICE mkII or Studio 4.09 is erasing the EEPROM when it's connected and uploading new code to the target device...
Wednesday, 16 June 2004 - 18:06
Cannot read EEPROM on MEGA48
Addendum to my last post. There are no interrupts enabled during this time and no EEPROM writes ever occur in my code. EEPROM is programmed once and never programmed again.
Wednesday, 16 June 2004 - 16:10
Cannot read EEPROM on MEGA48
The EEPROM read sequence does not read the correct data at the selected address. The data is always read as 0xFF. The EEPROM data was programmed, verified, and re-verified by...
Wednesday, 16 June 2004 - 16:08
Multiply assembler
Look here for multiply and divide routines. http://www.atmel.com/dyn/resourc...
Wednesday, 16 June 2004 - 15:11
Dynamic Interrupt Vectors
Your strategy is correct. The "normal" interrupt vectors in flash will RJMP into your dynamic vectors in RAM. Each of these dynamic vectors in RAM will RJMP to the appropriate...
Wednesday, 16 June 2004 - 04:20
Dynamic Interrupt Vectors
Your strategy is correct. The "normal" interrupt vectors in flash will RJMP into your dynamic vectors in RAM. Each of these dynamic vectors in RAM will RJMP to the appropriate...
Wednesday, 16 June 2004 - 04:19
Studio 4.09 and ATJTAGICE mkII
Thank you for your response tolson2. I will try to describe the sequence of events the best I can. 1. To verify that the microprocessor was soldered down to the target and could...
Tuesday, 15 June 2004 - 14:05
RS485 + what protocol?
Chosing a physical layer (RS485), a protocol layer (???), and the network baud rate will be dependant on many factors. Your specification of 35 nodes is only a small part of the...
Tuesday, 15 June 2004 - 04:11

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