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0.2 uA sleep with external watchdog wakeup Hi! IIRC I read about a thread about low power sleeping with timekeeping. I want to share something: It's not precise timekeeping, but it's pretty low power and periodic wake up... |
Friday, 13 September 2013 - 00:09 |
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tiny, fast PRNG uint8_t rnd(void) { static uint8_t s=0xaa,a=0; s^=s<<3; s^=s>>5; s^=a++>>2; return s; } Tiny and fast 8 bit pseudo random number... |
Saturday, 3 November 2012 - 17:28 |
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change reset vector, program code in interrupt table Hi! I made a bootloader and for testing purposes I want code with an unusual jump in the reset vector. Usually at address 0 there would be a jump to right after the vector table... |
Friday, 30 September 2011 - 12:56 |
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What is picoPower? Atmel mentions picoPower, but I don't see it defined anywhere. Can anyone tell me what this is? "AVR4013: picoPower Basics" [1] takes the ATmega88PA as example. The parametric... |
Monday, 26 September 2011 - 16:56 |
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self modifying bootloader Hi! I made a 31 word bootloader based on Kasper Pedersens tinyloader. The reset vector points to the loader and in the loader there is a jump to the application. How can I update... |
Wednesday, 21 September 2011 - 11:23 |
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stack initialization / addressing mode rant Hi! While coding assembly I noticed stack initialization code and wondered if that is really necessary. If at boot SP=0 and the stack used pre-decrement for push/call, then the... |
Tuesday, 20 September 2011 - 15:11 |
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move assembler bootloader code to end of flash Hi! I'm trying to modify and port Kasper Pedersens assembler bootloader tinyloader to gnu avr-gcc. I'm stuck with moving the code to the end of flash. I read about .section... |
Wednesday, 7 September 2011 - 20:23 |
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nop optimized away Hi! I have an unresponsive LPC flash BIOS chip which I want to program via an ATmega168. Since adding nops has resolved a timing problem before, I tried to add blocks of 4 nops,... |
Monday, 12 July 2010 - 23:53 |
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Discard first ADC result? Hi! Quote:The first ADC conversion result after switching voltage reference source may be inaccurate, and the user is advised to discard this result. I want to make single ADC... |
Friday, 11 June 2010 - 17:40 |
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soundcard serial comm snippet Hi! Since my ATtiny lacks a UART I made a simple and short (100 bytes) serial transmission routine. Great for debugging/development when you don't want to include a 2KB USB stack... |
Wednesday, 29 April 2009 - 12:27 |