1.24 SPI Blocking

This example demonstrates the transmit and receive operation over SPI interface in a blocking manner. The example application transmits known values from an array and verifies the data received through the loop back by comparing the transmitted data and the received data. The example application performs the loop back test only once after a power on reset. After the loop back is complete, the status of the loop back is indicated and the application remains idle. The loop back test requires the MOSI output pin to be connected to the MISO input pin so that anything transmitted will also be received.

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/spi/spi_self_loopback_blocking/firmware.

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

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

• Use a jumper wire to short pin MOSI and pin MISO of the J1 connector
• Connect the Debug USB port on the board to the computer using a micro USB cable.

• Connect micro USB cable to the ‘USB Debug’ connector on the board to the computer
• Use a jumper wire to short pin 16 and 17 on J501

• Connect micro USB cable to the ‘USB Debug’ connector on the board to the computer
• Use a jumper wire to short pin MOSI and pin MISO of J300

• Build and program the application using its IDE
• LED indicates the success or failure:
  • LED is turned ON when the when the value received matched with the transmitted value
  • LED is turned OFF when the when the value received did not match with the transmitted value
  Following table provides LED names:

  Board	LED Name
  PIC32MK GP Development Kit	LED2
  PIC32MK MCJ Curiosity Pro Board	LED2
  PIC32MK MCM Curiosity Pro Board	LED1