I am using the SPI A on the c28 core of my F28M35x processor
I tried the example provide by Kris Parrent here http://e2e.ti.com/support/microcontrollers/tms320c2000_32-bit_real-time_mcus/f/171/t/171156.aspx#625809
My outputs have the good comportments but not the right voltage.
The chipselects works fine but the SPISIMOA on GPIO16 and the SPICLKA on GPIO18 have only 20mV variation voltage between the high level and the low level
My pin are not connected is it the problem ?
Thanks in advance
Sounds like your muxing might not be configured right and you are only seeing the internal noise on the output. Can you confirm?
My pins are configure like this one :
GpioCtrlRegs.GPAQSEL2.bit.GPIO18 = 3;
GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 1;
And I use the setup_m3 example for the m3 core which enable the pull up
yes I feel that I am seeing only the internal noise, but I don't know how I can see the right signal with the good voltage.
I tried to continue some tests and it appears that all my SPI signals are good but not on the Docking station pins.
They are good on the connectivity Mux of my control card and it's the same things for many others signals.
I thought that signals on the connectivity Mux were the same on the connectivity Mux pins and on my docking station pins but it's not the case.
Do you know why ?
I have this problem for SPI A pins (GPIO16 - 19) and on the GBPMUX1 pins (GPIO32 - 47). I had not tried the others.
Did you manage to resolve this? I assume you are setting the jumper on the connectivity mux between the two bottom rows to bring the signal from the mux to the docking station pin?
Yes my problem has been resolve ... by setting the jumper.
Thanks a lot Kris.
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