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3.3V ATMEGA128 need more firepower hobby project overclock?
Hi, I have overgrown my hobby project, exceeding realtime budget by 10-15% and entering jitter swamp. At 16MHz and 5V was so cool. Actual clock 8MHz at 3.3V, but would prefer some...
Wednesday, 25 March 2009 - 23:37
Large global object of structure or class not working - why?
Hi, I am using g++ compiler with custom options. The problem is that I have intermittent hanging (like memory overrun but most often it hangs completely) when I create a global...
Monday, 26 January 2009 - 22:14
Terminal that interpretes ESCAPE sequences besides HyperTerm
One more quiz: Many ppl say HyperTerm has limitations etc. But after many searches it is the only one that correctly interpretes ESC sequences, and you get colorful menus etc (you...
Monday, 26 January 2009 - 00:34
'Terminal problem'. How to connect to 500K etc baudrates
Hi, I have discovered that using FTDI chip I can reliably connect using USART at 500KBPS or even 1MBPS. the only problem is that I have to write my own software, because hardly...
Sunday, 25 January 2009 - 22:58
-fpack-structs, performance, C++ and reference class members
Hi, Just encountered the following surprise: class KALMAN_ANGULAR { private: // Constants: const float DT; const float Q_angle; const float Q_gyro; const float R_angle;//10...
Sunday, 14 December 2008 - 13:55
USART requires enabling pullups when using GPS module?
Problem: I have spotted in my GPS multibaudrate initialisation routine that the uC TX stays low and consequently sometimes GPS sees (probably, very hard to find out) garbage... It...
Thursday, 4 December 2008 - 18:54
SPI access sharing between ISR and main - AT45, AT25, others
Hi, The software I wrote is quite complex, but I have encountered the following issue that makes programming very complex. This is a sort of warning of unexpected complexity. I...
Tuesday, 11 November 2008 - 15:31
INT0 low level interrupt still firing despite disabled EIMSK
Hi, I am using ATMEGA88. INT0 is configured as low level interrupt, because I am using it to wake up from deep sleep. everything works fine, and INT0 is also casual OK button (...
Tuesday, 4 November 2008 - 21:51
Searching for lightweight alpa LCD 16x2, or maybe graphical
Hi, I am plannng to make an embedded display with ATMEGA88 and very small LCD, 4 cursors, OK and NO. Plus maybe 4 status leds: RGBY. The actual choice is bulky LCD 16x2 26g...35g...
Tuesday, 4 November 2008 - 14:19
Is pullup value (RESET pin?) affecting current consumption?
Hi, I have digested AVR040 and AVR042. I am wondering if there are other than noise considerations to using external pull-ups and their size. We talk about long-life battery...
Monday, 27 October 2008 - 15:27
ATMEGA128 ISP with MUX design problem: RX at idle low/high?
HI, I have designed a board with an ISP for ATMEGA128 using 4053 mux. See attached schematics. Besides programming via UART, in normal activity I use RX pin to get data from...
Tuesday, 7 October 2008 - 14:43
FTDI232RL, will it always use COM15 by default?
Hi, I have tested my 2 FTDI chips and I am proud to be able to achieve 1MBPS from atmega128 at 16MHz. They always show as COM15 and no custom driver installation is needed at...
Friday, 3 October 2008 - 16:34

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