1.14 SPI Driver Synchronous - Self Loopback Multi Client

• This example writes and reads back the same data (self loop back) for two different clients connected over the same SPI bus by using the multi client feature of a synchronous SPI driver
• The example also demonstrates how to setup two different client transfers at two different baud rates
• The example has three RTOS threads for the purpose:
  • APP_CLIENT1_Tasks:
    • This thread opens the SPI driver instance and performs a continuous loop back transfer
    • If the loop back is successful, the loop back is repeated every 100 ms
    • In case of an error, the thread closes the driver and suspends itself
  • APP_CLIENT2_Tasks:
    • This thread opens the SPI driver instance and performs a continuous loop back transfer
    • If the loop back is successful, the loop back is repeated every 100 ms
    • In case of an error, the thread closes the driver and suspends itself
  • APP_MONITOR_Tasks:
    • This thread checks the status of loop back done by the two client tasks and turns on the LED if the loop back transfer status reported by both the clients is successful

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file. This content can also be downloaded using content manager by following these instructions.

Path of the application within the repository is apps/driver/spi/sync/spi_self_loopback_multi_client/firmware.

To build the application, refer to the following table and open the project using its IDE.

To load the application binary onto the target device, we need to use at91bootstrap loader. Refer to the at91bootstrap loader documentation for details on how to use it to bootstrap the application binaries.

The following table shows the target hardware for the application projects.

1. Build and program the application using its IDE
2. LED is turned ON on Success