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Gotcha using SUBI to increment a 16-bit value
My aim was to increment a word length value in R17:R16 by a constant amount like this: subi R16,-0x40 clr a adc R17,afails if, for example, R17...
Monday, 12 February 2018 - 21:15
Interesting USART Behaviour
I have come across an interesting behaviour of the USART in an ATMega328p. I discovered this while writing a simple main loop that scans various routines in turn. One of these...
Thursday, 25 January 2018 - 14:08
Hardware Error in ATMega328p ?
I have come across a most curious behaviour in the ATMega328p. Under certain conditions, doing an st  X,R16 appears to brick my program (but not the chip itself). Storing...
Monday, 1 January 2018 - 16:27