/*
 *
 * Copyright © 2004, University of Washington, 
 * Department of Computer Science and Engineering. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, 
 * this list of conditions and the following disclaimer. 
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation 
 * and/or other materials provided with the distribution.
 *
 * 3. Neither name of the University of Washington, Department of Computer 
 * Science and Engineering nor the names of its contributors may be used to 
 * endorse or promote products derived from this software without specific 
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR 
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 *
 */

#include "FTDI466API.h"

using namespace std;

int main(void)
{
	FTDI466API usbDevice;
	char buffer[256];
	unsigned char rxBuffer[256];
	unsigned char txBuffer[256];
	DWORD numBytesToSend;
	DWORD bytesSent;
	DWORD numBytesToRead;
	DWORD bytesReceived;
	
	// setup USB device for MPSSE mode
	bool setup = usbDevice.open();
	if(!setup)
		return 0;

	cout << "INITIALIZING SPI" << endl;

	// setup for SPI communication
	txBuffer[0] = 0x80; // setup PORT 
	txBuffer[1] = 0x08; // make CS high
	txBuffer[2] = 0x0B; // outputs: SK, DO, CS, inputs:  DI, GPIOL1-L4
	txBuffer[3] = 0x86; // set clk divisor to Tx at 200kHz
	txBuffer[4] = 0x1D; // speed low byte
	txBuffer[5] = 0x00; // speed high byte
	txBuffer[6] = 0x85; // disconnect TDI/DO output from TDO/DI input for loopback testing
	numBytesToSend = 7;

	// send the instructions ot the USB device
	bytesSent = usbDevice.write(txBuffer, numBytesToSend); 

	if(bytesSent != numBytesToSend)
		cerr << "Not all the bytes were sent when initializing MPSSE" << endl;

	// see if there were any error codes when setting up SPI
	numBytesToRead = usbDevice.getReceiveQueueSize();

	if(numBytesToRead > 0)
	{
		bytesReceived = usbDevice.read(rxBuffer, numBytesToRead); 

		if(bytesReceived != numBytesToRead)
			cerr << "Problem when trying to retrieve the error bytes" << endl;
	
		for(unsigned int i = 0; i < bytesReceived; i++)
			cout << "Error Byte: " << rxBuffer[i] << endl;
	}

	// loop to demonstrate the SPI protocol
	for(int loop = 0; loop < 10; loop++)
	{
		Sleep(1000);

		txBuffer[0] = 0x80; // setup PORT 
		txBuffer[1] = 0x00; // make CS low
		txBuffer[2] = 0x0B; // outputs: SK, DO, CS, inputs:  DI, GPIOL1-L4
		txBuffer[3] = 0x35; // clock out on negative edge, in on negative edge, MSB 
		txBuffer[4] = 0x04; // low byte of length : note a length of zero is 1 byte, 1 is 2 bytes
		txBuffer[5] = 0x00; // high byte of length
		txBuffer[6] = 0x71; // payload
		txBuffer[7] = 0x72;
		txBuffer[8] = 0x73;
		txBuffer[9] = 0x74;
		txBuffer[10] = 0x70 + (char) loop;
		txBuffer[11] = 0x80; // setup PORT 
		txBuffer[12] = 0x08; // make CS high
		txBuffer[13] = 0x0B; // outputs: SK, DO, CS, inputs:  DI, GPIOL1-L4

		numBytesToSend = 14;

		// send bytes
		bytesSent = usbDevice.write(txBuffer, numBytesToSend); 
		if(bytesSent != numBytesToSend)
			cerr << "Not all the bytes were sent when initializing MPSSE" << endl;

		Sleep(5); // make sure the usb device has enough time to execute command - 5 ms latency timeout is set

		// get number of bytes in the received queue
		numBytesToRead = usbDevice.getReceiveQueueSize();
		cout << "Received " << numBytesToRead << " Bytes" << endl;
		if(numBytesToRead > 0)
		{
			// get the received bytes
			bytesReceived = usbDevice.read(rxBuffer, numBytesToRead); 

			if(bytesReceived != numBytesToRead)
				cerr << "Problem when trying to retrieve the bytes from the receive queue" << endl;
			else
			{
				// print out the bytes received over SPI in hex
				for(unsigned int i=0; i < bytesReceived; i++)
					cout << itoa(rxBuffer[i],buffer,16) << " ";
				cout << endl;
			}
		}
	}

	// finished with the USB device
	usbDevice.close();

	return 0;
}