littleWire.c

/*
	http://kehribar.me/projects/Little-Wire/

	Copyright (C) <2011> ihsan Kehribar <ihsan@kehribar.me>
	Modified by Omer Kilic <omerkilic@gmail.com>

	Permission is hereby granted, free of charge, to any person obtaining a copy of
	this software and associated documentation files (the "Software"), to deal in
	the Software without restriction, including without limitation the rights to
	use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
	of the Software, and to permit persons to whom the Software is furnished to do
	so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all
	copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	SOFTWARE.
*/

/***************************************************************/
/* See the littleWire.h for the function descriptions/comments */
/***************************************************************/
#include "littleWire.h"

unsigned char rxBuffer[RX_BUFFER_SIZE]; /* This has to be unsigned for the data's sake */

littleWire* littleWire_connect()
{
	littleWire  *tempHandle = NULL;

	usb_init();
	usbOpenDevice(&tempHandle, VENDOR_ID, "*", PRODUCT_ID, "*", "*", NULL, NULL );

	return tempHandle;
}

unsigned char readFirmwareVersion(littleWire* lwHandle)
{
	usb_control_msg(lwHandle, 0xC0, 34, 0, 0, rxBuffer, 8, USB_TIMEOUT);

	return rxBuffer[0];
}

void digitalWrite(littleWire* lwHandle, unsigned char pin, unsigned char state)
{
	if(state){
		usb_control_msg(lwHandle, 0xC0, 18, pin, 0, rxBuffer, 8, USB_TIMEOUT);
	} else{
		usb_control_msg(lwHandle, 0xC0, 19, pin, 0, rxBuffer, 8, USB_TIMEOUT);
	}
}

void pinMode(littleWire* lwHandle, unsigned char pin, unsigned char mode)
{
	if(mode){
		usb_control_msg(lwHandle, 0xC0, 13, pin, 0, rxBuffer, 8, USB_TIMEOUT);
	} else {
		usb_control_msg(lwHandle, 0xC0, 14, pin, 0, rxBuffer, 8, USB_TIMEOUT);
	}
}

unsigned char digitalRead(littleWire* lwHandle, unsigned char pin)
{
	usb_control_msg(lwHandle, 0xC0, 20, pin, 0, rxBuffer, 8, USB_TIMEOUT);

	return rxBuffer[0];
}

unsigned int analogRead(littleWire* lwHandle, unsigned char channel)
{
	usb_control_msg(lwHandle, 0xC0, 15, channel, 0, rxBuffer, 8, USB_TIMEOUT);	

	return ((rxBuffer[1] *256) + (rxBuffer[0]));
}

void pwm_init(littleWire* lwHandle)
{
	usb_control_msg(lwHandle, 0xC0, 16, 0, 0, rxBuffer, 8, USB_TIMEOUT);
}

void pwm_stop(littleWire* lwHandle)
{
	usb_control_msg(lwHandle, 0xC0, 32, 0, 0, rxBuffer, 8, USB_TIMEOUT);
}

void pwm_updateCompare(littleWire* lwHandle, unsigned char channelA, unsigned char channelB)
{
	usb_control_msg(lwHandle, 0xC0, 17, channelA, channelB, rxBuffer, 8, USB_TIMEOUT);
}

void pwm_updatePrescaler(littleWire* lwHandle, unsigned int value)
{
	switch(value)
	{
		case 1024:
			usb_control_msg(lwHandle, 0xC0, 22, 4, 0, rxBuffer, 8, USB_TIMEOUT);
		break;
		case 256:
			usb_control_msg(lwHandle, 0xC0, 22, 3, 0, rxBuffer, 8, USB_TIMEOUT);
		break;
		case 64:
			usb_control_msg(lwHandle, 0xC0, 22, 2, 0, rxBuffer, 8, USB_TIMEOUT);
		break;
		case 8:
			usb_control_msg(lwHandle, 0xC0, 22, 1, 0, rxBuffer, 8, USB_TIMEOUT);
		break;
		case 1:
			usb_control_msg(lwHandle, 0xC0, 22, 0, 0, rxBuffer, 8, USB_TIMEOUT);
		break;
	}
}

void spi_init(littleWire* lwHandle)
{
	usb_control_msg(lwHandle, 0xC0, 23, 0, 0, rxBuffer, 8, USB_TIMEOUT);
}

unsigned char spi_sendMessage(littleWire* lwHandle, unsigned char message)
{
	usb_control_msg(lwHandle, 0xC0, 21, message, 0, rxBuffer, 8, USB_TIMEOUT);

	return rxBuffer[0];
}

void spi_sendMessage_multiple(littleWire* lwHandle, unsigned char * sendBuffer, unsigned char * inputBuffer, unsigned char length ,unsigned char mode)
{
	int i=0;
	if(length>4)
		length=4;
	usb_control_msg(lwHandle, 0xC0, (0xF0 + length + (mode<<3) ), (sendBuffer[1]<<8) + sendBuffer[0] , (sendBuffer[3]<<8) + sendBuffer[2], rxBuffer, 8, USB_TIMEOUT);
	for(i=0;i<length;i++)
		inputBuffer[i]=rxBuffer[i];
}

void spi_updateDelay(littleWire* lwHandle, unsigned int duration)
{
	usb_control_msg(lwHandle, 0xC0, 31, duration, 0, rxBuffer, 8, USB_TIMEOUT);
}

void i2c_init(littleWire* lwHandle)
{
	usb_control_msg(lwHandle, 0xC0, 24, 0, 0, rxBuffer, 8, USB_TIMEOUT);
}

void i2c_beginTransmission(littleWire* lwHandle, unsigned char address)
{
	usb_control_msg(lwHandle, 0xC0, 25, address, 0, rxBuffer, 8, USB_TIMEOUT);
}

void i2c_send(littleWire* lwHandle,unsigned char message)
{
	usb_control_msg(lwHandle, 0xC0, 26, message, 0, rxBuffer, 8, USB_TIMEOUT);
}

void i2c_endTransmission(littleWire* lwHandle)
{
	usb_control_msg(lwHandle, 0xC0, 27, 0, 0, rxBuffer, 8, USB_TIMEOUT);
}

void i2c_requestFrom(littleWire* lwHandle,unsigned char address,unsigned char numBytes,unsigned char* responseBuffer)
{
	int i,k;
	usb_control_msg(lwHandle, 0xC0, 30, address, numBytes, rxBuffer, 8, USB_TIMEOUT);
	
	for(i=0;i<numBytes;i++)
		responseBuffer[i]=rxBuffer[i];
}