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Discussion Title Created date
Lack of performance with function call (even as inline)
Hi, I have the following function running in a XMEGA: void adc0Standby() { ADC0_CTRL1.OUTSET = _BV(ADC0_RD); ADC0_CTRL2.OUTSET = _BV(ADC0_CS); } But I have...
Tuesday, 1 June 2010 - 11:14
Has any interfaced with a melexis infrared temperature sens?
Hi, I'm trying to use an AVR to interface with a melexis infrared temperature sensor (MLX90614) Has anyone already done this before? I having a doubt about which is the i2c...
Monday, 11 January 2010 - 17:01
Using USI to communicate between AVR's
Hi, I have never used USI to communicate between AVR's I would like to know if the following scenario would be possible and also know about the possible bottle neck that this...
Tuesday, 3 November 2009 - 12:48
Squeezing AT90USB1287 USB data transfer performance
Hi, I'm trying to know how much I can get from a AT90USB1287 and it seems that i can't get no more that 185 KBytes per second. To this test I have used a simply LUFA based program...
Tuesday, 27 October 2009 - 14:31
Exponential calculation
Hi, Is there any well known way of calculating the exponential without messing with the AVR performance? Thanks, Nuno
Friday, 28 August 2009 - 17:02
Help using adc noise reduction function
Hi, I'm trying to enable noise reduction mode on a avrusb646. I have made a configuration where the interrupt of adc conversion is triggered. It is working! Then I added the...
Wednesday, 8 July 2009 - 15:39
avr adc free running mode
Hi, I'm dealing with avr adc free running mode because I need to achieve high speed readings, and this mode makes all the difference, however it also brings a new problem. How to...
Monday, 6 July 2009 - 14:20
AT90USBXXXX range performance
Hi, I was wondering I someone who as already used this chips could post some performance results. I'm kind of disappointed with the obtained results with this babies and I wanted...
Friday, 26 June 2009 - 10:31
Big integer calculations with AVR
Hi, Currentyl I'm trying to make a mood lamp and for that I'm using a HsvToRgb function. My first problem was to make the function use only integers. Now, the problem is that in...
Sunday, 14 June 2009 - 15:06
The best way to perform math calculations
Hi, I'm used to program in standard computers and what I realized with micro controller programming is that resources are very limited and not specialized compilers can be a...
Monday, 1 June 2009 - 23:00
Is there any rule to change registers inside interrupts?
Hi, Is there any rule to make changes to registers inside interrutps? I have a fast pwm running on a 16 bit timer, with a clock source of 12Mhz prescaled by 8 and two interrupts:...
Wednesday, 27 May 2009 - 23:23
Building a sine wave lookup table
Hi, I'm trying to generate a 1Mhz sinewave using a tiny45 with its internal oscialltor and PLL. I'm following Atmel's application note 131 and they say to update the timer OCR...
Wednesday, 27 May 2009 - 15:54