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problems with left shift operator
I am having problems left shifting more than 14 places. Hers is my code. uint8_t str[32]; uint8_t index; uint32_t value = 0; uint32_t othervalue = 1; sprintf(str,"\r\ndebug...
Monday, 16 May 2011 - 23:30
problems with MAX3421
Has any one successfully interfaced with the Maxim max3421 usb chip? I have established communication with the chip but have not been able to get it to enumerate the device. My...
Thursday, 7 May 2009 - 15:55
automotive power suppy filtering
Cars are one of the nastiest environments for electronics and my car may be a worst case(mid 70s British sports car). I've seen lot's of generality's about power supply filtering...
Wednesday, 15 October 2008 - 18:45
adc not reading correctly
I'm using an ATMega2560 at 14.7456 mhz. Compiler is AVRGCC. I have a precision 4.07v voltage source connected to AREF. The problem is that my readings are consistently high. with...
Wednesday, 15 October 2008 - 18:25
hosting multiple usb devices with AVRUSB
The project I am working on needs to use a USB keyboard as an input device and a flash drive for data logging. The USB chip will be peripheral to the main controller. Can the...
Tuesday, 7 October 2008 - 21:35
mfile problem - make: *** No rule to make target `main.elf',
So I'm still having problems getting floats to print using AVRStudio https://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=64641 I tried using Mfile to...
Wednesday, 4 June 2008 - 17:59
float printing problem
I've dealt with this before and it worked with older versions. My os is winxp, gcc version 4.3.0 (WinAVR 20080512)AVR studio version 414 build 589. libprintf_flt.a and libm.a are...
Saturday, 31 May 2008 - 00:57
pointer problems
I'm using SPI slave mode to send a 32 bit signed integer. This code works, when the send command comes in I do int32_t send = count; //convert to an array of bytes...
Tuesday, 15 January 2008 - 19:35
tranlating register variable to int32_t
I have a signed 32 bit number that is kept in 4 register variables because it is modified in a speed critical ASM routine. My problem is that when I go to report it in my main...
Tuesday, 15 January 2008 - 00:29
what happened to my asm functions
I am trying to write an ISR in assembly to be used in my C program. In my .S file I have the function .global INT1_vect INT1_vect: ;do some stuff here push r16 nop pop r16...
Thursday, 27 December 2007 - 19:26
AVR USB keyboard interface
I developed a project a few years ago that used a PS2 keyboard as an input device to an Mega128. Now we are looking at a revision and I fear PS2 may go the way of the vanishing...
Tuesday, 13 November 2007 - 17:21
problems with SPI slave mode
I'm programming a Mega88 to run as an SPI slave. The master sends a single byte command 'r' and the slave should return a 32 bit value so the master sends the command followed by...
Friday, 2 November 2007 - 17:05

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