6.5 Transfer Instruction (XferInstruction) Pseudo Operation

Format:
XferInstruction (instruction)
Purpose:
  • To send 32 bits of data for the device to execute.
Description:
  • The instruction is clocked into the device and then executed by CPU.
Restrictions:
  • The device must be in Debug mode.
Example:
  • The following is an example of how to use the Transfer Instruction (XferInstruction) function:
    XferInstruction (instruction)
{
// Select Control Register
SendCommand(ETAP_CONTROL);
// Wait until CPU is ready
// Check if Processor Access bit (bit 18) is set
do {
controlVal = XferData(32’h0x0004C000);
} while( PrAcc(contorlVal[18]) is not ‘1’ );
// Select Data Register
SendCommand(ETAP_DATA);
// Send the instruction
XferData(instruction);
// Tell CPU to execute instruction
SendCommand(ETAP_CONTROL);
XferData(32’h0x0000C000);
}