See also be1d296 stm32: serial use 115200
In that commit we mostly replaced 38400, now we've cleaned up all of
them to be consistent.
README
This example program demonstrates simple SPI transceive on stm32vl discovery board.
The terminal settings for the receiving device/PC are 9600 8n1.
The example expects a loopback connection between the MISO and MOSI pins on SPI1.
A counter increments and the spi sends this byte out, after which it should come back in to the rx buffer, and the result is reported on the uart.