Could we get some support regarding SPI on the AFE5809EVM board?
We are controlling the SPI from an ARM chip with the following configuration:
SCLK - 128 kHz
Data Width - 24 bits
Shift direction - MSB first
The data that comes out has been verified with an oscilloscope.
However, when the signals are connected to the SCLK, SEN, SDATA, GND pins, we are not able to have it working.
We use the exact same series of command as used by the AFE5809 EVM GUI (as it allows us to record its commands). The USB is disconnected and we are purely running the SPI from the on board pins.
Any suggestions as to why it might not be working?
In reply to csmyth:
The problem is that if I am sending three packets of 8 bits, the SEN will not be low the entire time, but low for the first packet of 8 bits and then back up again. Would that still work? I'm guessing no.
In reply to Jack Zhang2:
Actually we can get the SEN to stay low the entire time.
To run SPI and remove USB did you remove FB17 to disable USB?
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.