All Questions

Tagged with
Filter by
Sorted by
Tagged with
1
vote
1answer
67 views

progmem data array optimized out [closed]

I try to use a ATTiny10 to drive some APA102 LEDs. The LEDs are arranged in a 5x5 array. To draw something I stored some 'images' in PROGMEM. Program looks like this: ...
1
vote
1answer
94 views

ATTiny414 inline assembly operand constraints for IO pin parameter

I'm trying to use the light_ws2812 library to drive WS2812 LEDs from an ATTiny414. The core of that library is an inline assembly snippet that bitbangs the serial line. here it is with the timing-nops ...
3
votes
2answers
191 views

Strange issue with ATTiny10 + avr-gcc: counter used in ISR corrupted by global variables?

I have a very strange issue of a possible memory corruption when using global variables and a timer overflow interrupt on the ATTiny10 (using avr-gcc 4.9.2). I can't make any sense of it but managed ...
0
votes
1answer
402 views

ATtiny85 analog input constantly on max

I am currently getting into AVR programming and I want to read in two values from two potentiometers on the analog inputs PB3/ADC3 PB4/ADC2. I want to (just for now) light an two LEDs (PB1 and PB2) ...
2
votes
1answer
284 views

Avr-gcc does not compile correctly without optimizations, but works (badly) with -Os

I am developing software for attiny88 with avr-gcc toolchain. This is a cheap microcontroller with 8kB program memory, 512B SRAM and 64B non-volatile EEPROM data memory. This is all sufficient for the ...
0
votes
2answers
2k views

Difference and compatibility between AVR xxxA and xxx/xxxV series [duplicate]

This is kind of two questions(difference & compatibility), but since an extensive answer to the latter will probably include an answer to the former, I think it's okay. Anyway, on to the question:...
1
vote
0answers
631 views

Mystery while driving a NeoPixel Ring (WS2812) with a GEMMA (ATtiny85)

I am working with an Adafruit GEMMA and NeoPixel Ring 16 LEDs (ATtiny85 and 16 WS2812 leds) and trying to get a program to light the LEDs according to my "pattern" structure below, representing R, G, ...
2
votes
3answers
3k views

Short String overflows.text area on ATtiny85, Arduino IDE

I'm using the Arduino IDE with arduino-tiny (https://code.google.com/p/arduino-tiny/) on an ATTIny85. My code is maxing out the RAM, or so it seems: Adding a ...