Logomatic won't log UART?

Development Boards MicroMod
1

I’d like to get some help with my logomatic V2. I intend to use it in automatic UART mode, but I have yet to get it to log any data. I have tried a couple things. First of all, I’m using a sparkfun logic level converter (that doesn’t seem to be listed on the website anymore) to go from the 5V that my AVR microcontroller puts out to the 3.3V that the LPC2148 likes to see on it’s RX and TX lines. I confirmed that the logic converter is working by hooking up an oscilloscope to it. The voltage is actually converted to 3.2V intead of 3.3V. At any rate, I can see the digital data stream that is being transmitted by the AVR and as far as I can tell, it looks good. I then took the TX line of my level converter and hooked it up directly to the RX line on the Logomatic. I hooked the ground up to the ground on both microcontroller board and level converter boards so that each device was on the same ground.

I formatted the Logomatic to 9600 baud, which is what my AVR is set up to, and kept the rest of the config stock.

After several attempts at logging data this way, I experimented some by putting 3.3V into the logomatic. W/3.3V, I don’t need to switch the unit on as it turns on automatically. There was no difference regardless. The log file reads 0kb and is completely empty.

Thanks for your help in advance!

2

I have the same problem–Did you ever resolve? Which TX RX pins should I be using–there are two sets ?Thanks, John

3

3.2 V should be no problem.

The UART to connect to is UART 0 (the 6 pins isolated on the side).

I just, just (as in: between typing the previous sentence and this one) tested the RS232 logger and it seems to be working fine as far as I can say.

Previous tests I did were with 115200 (baud = 8) and this seems just not to work.

Instead of computing the registers content, the code should as well have a table with the values to slam in the registers (that would work fine unless one plays around with the clock speed).

@ 9600 baud it seems to runs just nice and smooth.