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Benchmarking programming time
Hi, I am programming ATMEGA2561 with 250KB code size. Programming time matters and code updates are frequent. Therefore I have benchmarked programming times just to discover...
Monday, 2 July 2012 - 13:18
Using -mcall-prologues generates several problems on AT2561
Using -mcall-prologues generates several problems on ATMEGA2561 One gets hundreds errors like G:\ATMEGA/usart.h(831,1): internal error: out of range error Yet the project is...
Sunday, 1 July 2012 - 21:42
scanf for floats in Studio 6
Atmel build tools clearly support vprintf party, completely ignoring vscanf's point of view. This policy cannot be tolerated in today's reality. More seriously adding this linker...
Sunday, 1 July 2012 - 09:49
Any method of limiting generation of ijmp and icall
Hi, for my project the compiler is notoriously generating a few icall and ijmp instructions. they land anywhere, a few of them in switch/case but are unfortunately present in...
Monday, 14 June 2010 - 16:01
MCUCSR always null...
Hi, I am trying to discover reset reason in atmega 128, the project is already quite large, playing it from all sides, however int main() { const uint8_t reset_source=MCUCSR;...
Sunday, 14 February 2010 - 02:34
debugWire and 2 ATMEGA with common RESET
Hi, From the appnotes I see that debugWire needs no pull-up or RESET pull-up not stronger than 10KOHM. I have 2 atmegas (88 and 128) connected and normally exchanging data via SPI...
Wednesday, 4 November 2009 - 16:12
String pooling in gcc with PROGMEM
Hi, My flash is really 99% used and I can save some 20KB by using string pooling in A VERY IMPORTANT ;-) real-time system with interactive console (the strings are variable...
Friday, 9 October 2009 - 23:13
How to get rid of unused functions to reduce code size
Hi, in my map file I see 2 versions are present: .text._Z18IsSameDirectionDEGff 0x00005d18 0x70 UAVDEV.o 0x00005d18...
Wednesday, 9 September 2009 - 09:18
Reliability poll about gcc for 2560 - what things to avoid?
Hi, I am migrating froim ATMEGA128 up, preferably to 2560. I remember we were battling recently with the fact that the constructors for the static objects placed above the first...
Monday, 6 July 2009 - 12:33
Long-term use of AT25 and FM25: pullups on HOLD and WP?
Hi, In my current design, I use FM25 and AT25. I have tied WP to RESET common with ATMEGAs, added 4053 mux on ISP lines, added pullup on CS, pulldown on SCK, pullup on HOLD. In...
Thursday, 30 April 2009 - 07:42
Sallen-Key output gain surprisingly stays at unity.
Hi, I am filtering out the output of MPXV5004DP differential pressure sensor. I played a little with 324 and currently MCP6004. MCP is powered by a clean 5V, I have designed a few...
Wednesday, 15 April 2009 - 23:48
4053 multiplexer might limit SPI baudrate between ATMEGAs?
Hi, I am connecting ATMEGA88 and 128. ATMEGA88 is using HEF4053BT that switches its MISO/MOSI between ISP and data bus coming to ATMEGA128. The clocks at worktime are slightly...
Thursday, 2 April 2009 - 00:45

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