Other Parts Discussed in Thread: MSP-EXP430FR5969, TIDM-1WIREEEPROM
Hello,
I am having a similar issue with the TIDM-1WIREEEPROM Software as a previous poster. I am using the MSP-EXP430FR5969, and Maxim DS9490R USB adaptor as the Master. I am also using a saleae logic analyzer to view the OW_DATA on P1.2. The board is configured to be self-powered and I have tried using various pull up resistor values from 270 to 2200 ohm on the OW_DATA line, but that doesn’t seem to be the problem. On the Saleae logic analyzer I can see it is not responding correctly to the Search command. The only thing that I've noticed that is different on the DS9490R is the long delay between the "Present" pulse and the "Search" command of about 7-14ms. In the dev note example this seemed to be only about 100us.
I was able to get it working with another device as the master, but I had to make a change to one of the timeouts in the SendBit() function. On this device the delay between the "Present" pulse and the "Search" command is about 1ms. With this timeout change, it still did not work when using the maxim USB DS9490R as the master though.
The main question I have is, has anyone used this software with any other 1-wire master device other than the dev board setup described in the application note? Since a software change was needed to get it working with another device, seems like there may be more changes needed to get it working with the Maxim DS9490R USB adaptor.
Any help/suggestions would be greatly appreciated!
Thanks,
Mark