#include <device.h>
#define SLAVE_ADDR 0x4
#define DATAI2C_byteCount 0x6
uint8 writeSwitch_flag ,readSwitch_flag;
void main()
{
uint8 index,position,I2C_byteCount;
uint8 I2C_masterBuffer[10];
uint8 I2C_slaveBuffer[10];
/* Message to be written*/
uint8 message[] = {0x11,0x22,0x33,0x44,0x55,0x66};
/* Enable I2C master and slave interrupts*/
I2C_S_EnableInt();
I2C_M_EnableInt();
/* Initialize I2C slave read and write buffers as I2C_slaveBuffer */
I2C_S_SlaveInitReadBuf(I2C_slaveBuffer,DATAI2C_byteCount);
I2C_S_SlaveInitWriteBuf(I2C_slaveBuffer,DATAI2C_byteCount);
/* Start all components */
LCD_Start();
isr_WriteSwitch_Start();
isr_ReadSwitch_Start();
I2C_S_Start();
I2C_M_Start();
/* Enable global interrupt */
CYGlobalIntEnable;
for(;;)
{
/* When Write switch is pressed write data to slave */
if (writeSwitch_flag)
{
/* Clear the writeSwitch_flag flag :writeSwitch_flag is set to 1 by Isr_WriteSlave */
writeSwitch_flag=0;
/* Clear any previous status */
I2C_M_MasterClearStatus();
/* Write data to the slave*/
I2C_M_MasterWriteBuf(SLAVE_ADDR,message,DATAI2C_byteCount,I2C_M_MODE_COMPLETE_XFER);
/* Wait till write operation is complete*/
while (!(I2C_M_MasterStatus() & I2C_M_MSTAT_WR_CMPLT))
{
;
}
}/* If statement ends here */
/* When Read switch is pressed read back the data written into the slave */
if (readSwitch_flag)
{
/* Clear the writeSwitch_flag flag:writeSwitch_flag is set to 2 by Isr_ReadSlave */
readSwitch_flag=0;
/* Clear any previous status */
I2C_M_MasterClearStatus();
/* Get the size of data previously written by master */
I2C_byteCount = I2C_M_MasterGetWriteBufSize();
/* Read back the data */
I2C_M_MasterReadBuf(SLAVE_ADDR,I2C_masterBuffer,I2C_byteCount,I2C_M_MODE_COMPLETE_XFER);
/* Wait till read operation is complete */
while (!(I2C_M_MasterStatus()&I2C_M_MSTAT_RD_CMPLT))
{
;
}
/* Get the no. of bytes read by the master */
I2C_byteCount = I2C_M_MasterGetReadBufSize();
/* Display the read back data */
for(index=0,position=0;index<I2C_byteCount;index++,position+=2)
{
LCD_Position(0,position);
LCD_PrintInt8(I2C_masterBuffer[index]);
}/* for loop ends here */
}/* if statement ends here */
/* Once write to slave is complete display the data and re-intialize the write buffer */
if (I2C_S_SlaveStatus()& I2C_S_SSTAT_WR_CMPT)
{
/* Get the no. of bytes in the slave write buffer (written by master)*/
I2C_byteCount = I2C_S_SlaveGetWriteBufSize();
/* Re-initialize the slave write buffer index to starting of the buffer(0) */
I2C_S_SlaveClearWriteBuf();
/*clear the status*/
I2C_S_SlaveClearWriteStatus();
/* Display the data written into the slave */
for(index=0,position=0;index<I2C_byteCount;index++,position+=2)
{
LCD_Position(1,position);
LCD_PrintInt8(I2C_slaveBuffer[index]);
}/* for loop ends here */
}/* If statement ends here */
/* If the master has completed the read transaction, re-initialize the read buffer*/
if(I2C_S_SlaveStatus()& I2C_S_SSTAT_RD_CMPT)
{
/* Re-initialize the read buffer index to to starting of the buffer(0) */
I2C_S_SlaveClearReadBuf();
/* Clear the status */
I2C_S_SlaveClearReadStatus();
}/* If statement ends here */
}/* for loop ends here */
}
/* [] END OF FILE */
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