My usb serial j-link (the one connected to PRINTF) on this board works fine when I first power it on. Then if you even look at it funny it all scrambles (the output looks like what you'd get if you changed the baud rate for example)
It does this with the default firmware.
It does this with every example project I've flashed.
It does this when debugging.
Unplugging the device, and plugging it back in usually fixes it temporarily.
Here's an example running one of the SPI example projects:
LPSPI board to board edma example.
This example use one board as master and another as slave.
Master and slave uses EDMA way. Slave should start first.
Please make sure you make the correct line connection. Basically, the connection is:
LPSPI_master -- LPSPI_slave
CLK -- CLK
PCS -- PCS
SOUT -- SIN
SIN -- SOUT
GND -- GND
Master transmit:
1 2 3 4 5 6 7 8 9 A B C D E F 10
11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20
21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30
31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40
This is LPSPI master edma transfer completed callback.
This is LPSPI master edma transfer completed callback.
Error occurred in LPSPI transfer !
Press any key to run again
*here i pressed a enter*
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