Post Created date
Avrdude and eeprom?
If you are using the standard Arduino bootloader... it does not support EEPROM. I have a stk500v1 boot loader which does so. I have been planning to publish it for a while, but...
Monday, 18 March 2013 - 00:44
NTC ADC problem
Sounds like your confusing degrees Kelvin and degrees Centigrade
Monday, 18 March 2013 - 00:31
USB based product - what protective devices to put in?
1: Fuse, definitely. You never know what you customers will try to do, and you can't depend that everything that looks like a USB connector actually is a standard USB connector....
Friday, 15 March 2013 - 21:57
read NULL in uart receive ring buffer after _delay function
Change usart_getc() to return a signed int, return -1 if nothing is available in the buffer. That way you know if usart_getc() returns a valid value, or a 'true null'.
Wednesday, 13 March 2013 - 10:10
How to measure the Back-Up Battery Voltage
Something like this simple circuit might work. The threshold voltage must be less than the difference between 5 volts and the battery voltage. If a CR2032, for example, you need...
Wednesday, 13 March 2013 - 09:52
Communication problem with wireless modules
Something I don't see in the picture, are capacitors. Those modules need 1 uF or so on the supply pins, if I remember correctly.
Friday, 8 March 2013 - 21:29
Burn bootloader and a program at the same time
There's a lot of threads on here about how to put application and boot loader together in a single .hex file, to be written in a single 'burn'. That seems like a hassle, when it...
Friday, 8 March 2013 - 11:12
Tardy bus responses causing problems, odd behavior observed
Declare 'prevByte' static. Without the debug statement, you are processing 0 or 1 new byte on each call to devCheckRxData(), and 'prevByte' has forgotten what the previous byte...
Thursday, 7 March 2013 - 11:04
Tardy bus responses causing problems, odd behavior observed
Well, that's a start, but you really have provided little additional information, beyond that a message ends with cr/lf. If an entire message will fit in your buffer, perhaps you...
Wednesday, 6 March 2013 - 23:09
UART/HyperTerm: I *THINK* This Is a New One
Though its possible, I don't think this can be blamed on the RC oscillator in this case. The fact you poked varying values into OSCCAL seems to bear this out. I would try a...
Wednesday, 6 March 2013 - 22:43
The usual external clock lockout accident...
Back in the day, I used to scrounge components anywhere I could find em. Ride my bicycle down the streets on trash pickup day, looking for tossed out TV sets, radios, record...
Wednesday, 6 March 2013 - 22:16
Tardy bus responses causing problems, odd behavior observed
Perhaps some information on the message structure and transmission protocol would help.
Wednesday, 6 March 2013 - 22:00