TC397 QSPI(CPU)

Hardware Setup

To configure QSPI

initQSPI() The function is initialized Master and Slave End .

QSPI Slave initialization

Related operations are in IfxQspi_SpiSlave.h in

QSPI Initialization from the module is done by defining IfxQspi_SpiSlave_Config Structure .
This structure is populated with default values by functions IfxQspi_SpiSlave_initModuleConfig().
then , Set pin 、ISR Terminal services and priorities .
IfxQspi_SpiSlave_initModule() Function is used to initialize QSPI From the module .
Besides , initialization QSPI The buffer used by the slave .

QSPI Master initialization

Related operations are in IfxQspi_SpiMaster.h

QSPI The main module is initialized by defining IfxQspi_SpiMaster_Config Structure .
This structure is populated with default values by functions IfxQspi_SpiMaster_initModuleConfig().
after , Set the interface operation mode 、 Pin 、ISR Interrupt service and priority .
IfxQspi_SpiMaster_initModule() Function is used to initialize QSPI The main module
One QSPI Module control 16 A separately programmable communication channel . In this example , function initQSPI2MasterChannel() Use structure IfxQspi_SpiMaster_ChannelConfig Instance of initializes channel zero . And then through the parameters sls.output Set the slave to select the channel number , Through parameters base.baudrate Change baud rate .
IfxQspi_SpiMaster_initChannel() Function is used to initialize QSPI Main channel .
Besides ,QSPI The buffer used by the host is also initialized .

QSPI Master - Slave communication

function transferData() Trigger SPI-Master and SPI-Slave Data transfer between .

IfxQspi_SpiSlave_getStatus() and IfxQspi_SpiMaster_getStatus() The function is used to check the status of the master and slave , To delay transmission until both are idle .

function IfxQspi_SpiSlave_exchange() Instructs the slave to receive a data stream of predefined length .
Call function IfxQspi_SpiMaster_exchange() To instruct the host to send data .
Last , function verifyData() Check Slave Whether the received data is consistent with Master The data sent matches .
If no error occurs during communication , Then connect to the port pin 13.3 Of LED D110 It will light up , Indicates that the transmission was successful

Run and Test

After code compilation and device programming , Follow these steps ：
1. stay Cpu0_main.c In Chinese, it means transferData() To set breakpoints , And check spiBuffers The structure of the spiMasterTxBuffer and spiSlaveRxBuffer.
2. Run the code example and check LED D110 (1) Whether it lights up （ Data transmission is correct ）.
3.spiMasterTxBuffer and spiSlaveRxBuffer The same send and receive data should now be displayed .
4. Remove Cables （ for example SCLKx）, Perform a reset and re run the application to see if the data transfer is interrupted and LED D110 (1) Extinguish （ Data transmission is blocked ）.