SPRAD26 April   2022 AM67 , AM67A , AM68 , AM68A , AM69 , AM69A , DRA821U , DRA821U-Q1 , DRA829J , DRA829J-Q1 , DRA829V , DRA829V-Q1 , TDA4AEN-Q1 , TDA4AH-Q1 , TDA4AL-Q1 , TDA4AP-Q1 , TDA4VE-Q1 , TDA4VEN-Q1 , TDA4VH-Q1 , TDA4VL-Q1 , TDA4VM , TDA4VM-Q1 , TDA4VP-Q1

 

  1.   Trademarks
  2. 1SPI: Serial Peripheral Interface
  3. 2J7200/J721e MCSPI Support
    1. 2.1 MCSPI Features
  4. 3SPI: Master Mode Enabling and Validation on Linux
    1. 3.1 Enable SPI Instances of J721e/TDA4VM
    2. 3.2 Enable SPIDEV on TD4VM SDK
    3. 3.3 Exercise SPI From User Space on TI J7/TDA4x Using Standard Linux spidev_test Tool
  5. 4SPI: Slave Mode Enabling and Validation on Linux
    1. 4.1 Enable SPI Instances of J7200
    2. 4.2 Enable DMA for MCSPI4 Slave Node
    3. 4.3 Enable SPIDEV and SPI_SLAVE Configs
    4. 4.4 Test SPI Slave Functionality From User Space on TI J7200 Using Standard Linux spidev_test Tool
    5. 4.5 SPI Slave Testing Using spi-slave-time
    6. 4.6 Linux SPI Slave Challenges
    7. 4.7 Linux SPI Slave Mode General Limitations
    8. 4.8 McSPI SPI Slave Mode Limitations
  6. 5References

4 SPI: Slave Mode Enabling and Validation on Linux

To test slave mode, a master is also needed. Advantage of the hardware capability of J7200 is taken to demonstrate SPI slave support.

For more information, see the MCSPI Overviews chapter in the J7200 DRA821 Processor Silicon Revision 1.0 Technical Reference Manual.

MCSPI4 is directly connected as a slave to MCU_MCSPI2 by default at power-up. MCSPI4 and MCU_MCSPI2 are not pinned out externally.