xiicps_smbus_polled_master_example.c File Reference

Overview

This example can run on zynqmp / versal platform evaluation board and IIC controller configured as master in polled mode and loopback setup used for slave.

It sends and receives the data using IIC master device for SMBus transfers.

 MODIFICATION HISTORY:

Ver   Who Date     Changes



1.00  gm  06/30/22 First release
3.18  gm  07/14/23 Added SDT support.

Functions
int	IicPsMasterPolledExample (u16 DeviceId)
	This function does a minimal test on the Iic device and driver as a design example. More...
int	XIicPsSmbusPolledMasterWriteBlockData (XIicPs *InstancePtr, u8 Command, u8 ByteCount, u8 *SendBufferPtr)
	This function writes a buffer of data to the smbus slave. More...
int	XIicPsSmbusPolledMasterReadBlockData (XIicPs *InstancePtr, u8 Command, u8 ByteCount, u8 *RecvBufferPtr)
	This function sends a command and reads a buffer of data from the smbus slave. More...
int	main (void)
	Main function to call the polled master example. More...

Variables
XIicPs	Iic
	Instance of the IIC Device. More...
u8	SendBuffer [TEST_BUFFER_SIZE]
	Buffer for Transmitting Data. More...
u8	RecvBuffer [TEST_BUFFER_SIZE]
	Buffer for Receiving Data. More...

Function Documentation

int IicPsMasterPolledExample

(

u16

DeviceId

)

This function does a minimal test on the Iic device and driver as a design example.

The purpose of this function is to illustrate how to use the XIicPs driver.

This function sends and receives data as a smbus master in poll mode of the IIC.

Parameters

DeviceId

is the Device ID of the IicPs Device and is the XPAR_<IICPS_instance>_DEVICE_ID value from xparameters.h

Returns

XST_SUCCESS if successful, otherwise XST_FAILURE.

Note

None.

int main

(

void

)

Main function to call the polled master example.

Returns

XST_SUCCESS if successful, XST_FAILURE if unsuccessful.

Note

None.

References IicPsMasterPolledExample().

int XIicPsSmbusPolledMasterReadBlockData	(	XIicPs *	InstancePtr,
		u8	Command,
		u8	ByteCount,
		u8 *	RecvBufferPtr
	)

This function sends a command and reads a buffer of data from the smbus slave.

Parameters

InstancePtr	contains the address of XIicPs instance.
Command	contains send command.
ByteCount	contains the number of bytes to read.
RecvBufferPtr	contains the address of receive buffer.

Returns

XST_SUCCESS if successful else XST_FAILURE.

Note

None

References XIicPs_BusIsBusy(), XIicPs_ClearOptions(), XIicPs_MasterRecvPolled(), XIicPs_MasterSendPolled(), XIICPS_REP_START_OPTION, and XIicPs_SetOptions().

int XIicPsSmbusPolledMasterWriteBlockData	(	XIicPs *	InstancePtr,
		u8	Command,
		u8	ByteCount,
		u8 *	SendBufferPtr
	)

This function writes a buffer of data to the smbus slave.

Parameters

InstancePtr	contains the address of XIicPs instance.
Command	contains send command.
ByteCount	contains the number of bytes to write.
SendBufferPtr	contains the address of send buffer.

Returns

XST_SUCCESS if successful else XST_FAILURE.

Note

None

References XIicPs_BusIsBusy(), and XIicPs_MasterSendPolled().

Variable Documentation

XIicPs Iic

Instance of the IIC Device.

u8 RecvBuffer[TEST_BUFFER_SIZE]

Buffer for Receiving Data.

u8 SendBuffer[TEST_BUFFER_SIZE]

Buffer for Transmitting Data.