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Discussion Title Created date
forcing external interrupt
I have an external interrupt (INT1) that handles a button press and toggles some system state. Is it possible/advisable to trigger this interrupt in software so I can reuse the...
Wednesday, 27 May 2015 - 09:24
unexpected behaviour changing ocr1a in isr
I set up an ISR for INT1 on a falling edge. The ISR changes the OCR1A value depending on a volatile binary state, then toggles the state. The issue is that the interrupt seemingly...
Saturday, 9 May 2015 - 00:46
Isolation resistors necessary for SPI devices with opposite phase/polarity?
Are isolation resistors necessary for SPI devices on the same bus as the ISP if the device uses CPOL = 1 and CPHA = 1?
Saturday, 11 April 2015 - 23:14
SPI speed and isolation resistors
I'm putting a design onto PCB with multiple SPI slaves as well as the ISP which shares those lines. Prototyping on a breadboard with only 1 SPI device and the ISP it seems whether...
Friday, 3 April 2015 - 00:51
UART transmitting "."
I've somehow been trying unsuccessfully to do simple USART transmutations on my ATMega328. I copied out the examples in the data sheet for initialisation and transmitting a single...
Thursday, 26 March 2015 - 08:41
Attiny spi no ss?
I'm looking at using an ATTiny261A to communicate with two SPI devices. On the data sheet I couldn't see a dedicated SS pin, so my question is: can I use arbitrary pins as SS for...
Sunday, 15 March 2015 - 21:45
avrdude: verification error; content mismatch
I bought an Arduino Uno to program my AVR chips. I'm facing an error though from avrdude when trying to flash on a simple blink program. Running on Yosemite with standard avr-gcc...
Monday, 9 March 2015 - 06:57