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2015-07-24 Rena
We have a product with a processor that is connected to a peripheral device via high-speed USB. The processor and the peripheral are on the same board and the USB lines are connected by copper traces. We want to monitor the USB traffic with our Beagle USB 480 Protocol Analyzer. Because the USB signal lines between the processor and peripheral device are in copper, we cannot insert the Beagle analyzer in series - instead, we want to connect the Beagle by tapping into the USB signals in parallel. Is this possible? We're pretty sure we need some series resistors - but not sure what resistance value to use and how to make that connection. Can you help us with this?
2015-07-17 Rena
I’m using the Beagle I2C/SPI Protocol Analyzer and I could use some advice. I am testing SPI devices, transmitting and receiving 14 bytes of data; each pair (MISO and MOSI) is exchanged during the single byte transfer. The data is bidirectional – I’m receiving data from the master and sending the master a byte of data during the same 8 clock cycles. I want to view the data specifically when MOSI = 0xEE AND MISO = 0x6D.  Can I trigger captures for that specific bit pattern?
2015-07-15 Rena
I'm working on a project with a colleague who is in a different geographic location. He has collected data capture containing SPI traces from your Beagle I2C/SPI Protocol Analyzer and shared a .tdc file with me. I don’t have the analyzer or any other Total Phase products – how can I open this capture file?
2015-07-09 Rena
I saw your knowledge base article that describes how to program multiple images into SPI flash at a different offset, and I used it for the Aardvark I2CSPI Host Adapter: Programming a Single Sector of an SPI Flash Using the Cheetah Adapter and Flash Center. I followed the instructions in that article, but found the write times to be too long. In my case, the first image size is 500 kB. It took around 1-2 minutes to program the file into offset 0, sector 0.  The second image is only 4 kB, but it took five minutes to program it into offset 3F0000, sector 63 of the flash.
2015-07-08 Rena
I just started using the Cheetah SPI Host Adapter with the Flash Center Software and it works really well. I have a question about the bit rate speed. I don't always need the default bit rate speed of 50,000 kHz. In fact, most of the time, 40,000 kHz works with the SPI memory devices I control and program. A few devices work at slower speeds, but not many.
2015-07-01 Rena
I have three Aardvark SPI/I2C Host Adapters that I have been using to control three SPI slave devices. I'm starting a design where I'll need to control more than three SPI devices - what are my options? Can the Promira Serial Platform provide multiple SPI slave select (SS) signals? Also, similar to the Aardvark adapter, is there support for LabVIEW and Matlab?