Augusto Farina

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8 years, 8 months ago.

SPI problem using 2 controllers

Hi,

Im using a NUCLEO_F103RB board, with one device connected in SPI1 bus, and another device connected in SPI2 bus.

After accessing the device in SPI1, I got only zeros from the device in SPI2.

To fix this, I had to stop calling the aquire() function when writing to the devices, in libraries/mbed/common/SPI.cpp:

mbed spi

 int SPI::write(int value) {
//    aquire();
     return spi_master_write(&_spi, value);
 }

I dont know the side effects of doing this, but now it is working.

Any ideas?

Cheers,

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