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ATmega644 + Xilinx XPLA3 CPLD Programming
Hello, I am currently revisiting a design which consists of a mega644 and a load of hard wired logic, wishing to reduce its component count among other things. To achieve this I...
Friday, 23 November 2012 - 15:59
VNC1L - Keyboard Support
Hi, I'm looking at using a VNC1L to interface a USB keyboard to a microcontroller. FTDI briefly mentions the VNC1L can host HID devices, but does not seem to provide any relevant...
Monday, 22 February 2010 - 21:26
Minimal but best checksum
Hello, I'm implementing a simple comms protocol where each packet must be 16 bytes in length. The 1st byte indicates the packet type which determines the meaning of the following...
Thursday, 3 December 2009 - 14:53
Edge-mount PCB pins
Hi, Does anyone know of a supplier for the kind of edge-mounted solder pins you see on parallax basic stamps and RF-Solutions modules: I'm finding them difficult to google for...
Monday, 3 August 2009 - 09:31
PCB prototyping
Hi, Has anyone got a favorite PCB manufacturer that can build prototype PCBs to the following spec and at a reasonable price? 1.6mm FR4, 4-layer 0.125mm track/gap/ring 0.2mm...
Saturday, 1 August 2009 - 23:05
Multiple AVRs, multiple power rails and I2C
Hi, I've not seen any official figures for clamping diodes on AVR pins, but have seen a post on this forum from someone saying Atmel told them 0.5V, 1mA. I'm working on a test rig...
Monday, 1 June 2009 - 13:18
avr/pgmspace.h - inconsistent API
Hi, Seeing as the avr/pgmspace.h API goes to all the trouble of defining these types: typedef void PROGMEM prog_void typedef char PROGMEM prog_char typedef unsigned char...
Wednesday, 18 March 2009 - 15:21
Modem flow-control troubles
Hello, Having some problems communicating with a Simcom SIM300Z GPRS modem hooked up to a mega640 (low voltage logic levels, not RS232) and just wanted to double check with like-...
Thursday, 12 March 2009 - 14:25
Avarice + Dragon + Debugwire
Hi, I am thinking of getting a Dragon to debug an Atmega168 via debugWire and gdb under Linux. Looking at the AVaRICE source code, it seems that debugWire s/w breakpoints might...
Wednesday, 28 January 2009 - 23:22
Programming and labeling
Hi, Anyone know of a service in the UK/EU that can program and label AVRs in quantities >100. Labels must withstand PB-free reflow. At this point I'm mainly interested in...
Wednesday, 28 January 2009 - 10:33
Aligning a buffer in assembly
Hi, Is there a way, in GNU as, to allocate space for a buffer in .bss that is aligned to a 256-byte boundary? I have tried using the .align directive, but for some reason ld...
Tuesday, 20 January 2009 - 19:21
FMULS confusion
Hi, Take a look at this paragraph extracted from the description of FMULS in Atmel's AVR Instruction Set document (rev. G): Quote:The multiplicand Rd and the multiplier Rr are two...
Saturday, 27 December 2008 - 22:21

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