/*
 * uart.cpp
 *
 * Created on: 2011/07/30
 * Author: lynxeyed
 */

#include <string.h>
#include "LPC11xx.h"
#include "uart.h"

#ifdef __cplusplus
extern "C" {
#endif

// Flag mask for UART_LSR register.
const unsigned long LSR_TEMT = 0x40;
const unsigned long LSR_THRE = 0x20;
const unsigned long LSR_RDR = 0x01;
const unsigned long ACR_START = 0x01;
const unsigned long IER_RLS = 0x04;
const unsigned long IER_RBR = 0x01;

USerial Serial;

USerial::USerial()//USerial(SERIAL_PORT port) //define constructor
{
	this->port = marySerial1; //default = marySerial1
//	format = OCT;
	speed = 9600; //baudrate
	//begin(speed);
}

USerial::~USerial() {

}

void USerial::begin(int speed) {
	this->speed = speed;
	// Divisor ratio
	unsigned long Fdiv;

	// Configure P1[7] as TXD output.
	LPC_IOCON->PIO1_7 &= ~0x07; // FUNC=000 (GPIO)
	LPC_IOCON->PIO1_7 |= 0x01; // FUNC=001 (TXD)

	// Configure P1[6] as RXD input.
	LPC_IOCON->PIO1_6 &= ~0x07; // FUNC=000 (GPIO)
	LPC_IOCON->PIO1_6 |= 0x01; // FUNC=001 (RXD)

	// Enable UART clock
	LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 12); // UART=1

	// Enable UART peripheral clock
	LPC_SYSCON->UARTCLKDIV = 0x01; // DIV=1

	// fix baud-rate
	Fdiv = (SystemCoreClock * LPC_SYSCON->SYSAHBCLKDIV)
			/ (LPC_SYSCON->UARTCLKDIV * 16 * speed);

	// Set the baud rate divisor value
	LPC_UART->LCR |= 0x80;
	LPC_UART->DLM = Fdiv / 256;
	LPC_UART->DLL = Fdiv % 256;
	LPC_UART->LCR &= ~0x80;

	// Configure UART module as
	// 8 bit, 1 stop bit, no parity
	// Enable and reset TX and RX FIFO.
	LPC_UART->LCR = 0x03;
	LPC_UART->FCR = 0x07;
}

void USerial::end() {
	return;
}


void USerial::write(const char c) //uart_putc
{
	// Wait for TX buffer empty
	while (!(LPC_UART->LSR & LSR_THRE))
		;
	// Put a character
	LPC_UART->THR = c;
	return;
}

int USerial::available(void) {
	return (LPC_UART->LSR & LSR_RDR);
}

int USerial::read(void) {
	// Wait for RX buffer valid
	//while (!(LPC_UART->LSR & LSR_RDR));
	return LPC_UART->RBR;
}


#ifdef __cplusplus
} //extern "C"
#endif