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/*
* 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
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