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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...
Tue. Jun 1, 2010 - 11:14 AM
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...
Mon. Jan 11, 2010 - 05:01 PM
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...
Tue. Nov 3, 2009 - 12:48 PM
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...
Tue. Oct 27, 2009 - 02:31 PM
Exponential calculation
Hi, Is there any well known way of calculating the exponential without messing with the AVR performance? Thanks, Nuno
Fri. Aug 28, 2009 - 05:02 PM
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...
Wed. Jul 8, 2009 - 03:39 PM
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...
Mon. Jul 6, 2009 - 02:20 PM
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...
Fri. Jun 26, 2009 - 10:31 AM
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...
Sun. Jun 14, 2009 - 03:06 PM
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...
Mon. Jun 1, 2009 - 11:00 PM
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:...
Wed. May 27, 2009 - 11:23 PM
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...
Wed. May 27, 2009 - 03:54 PM