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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;
}
void USerial::print(const char *s) //uart_puts
{
int n;
for (n = 0; *s; s++, n++) {
write(*s);
}
//return n;
return;
}
void USerial::print(int val, RADIX_FORMAT format)
{
if(format == BYTE)
{
write((char)(val & 0xff));
return;
}
char s[32];
int i,j;
i=j=0; // header of strings
if (val<0)
{ //minus value
s[i]='-';
val=~val+1;
i++;
j++;
}
switch(format)
{
case BIN:
while (val>0)
{ // do until zero
s[i++]=radix_bin[val%format];
val/=format;
}
break;
case OCT:
while (val>0)
{ // do until zero
s[i++]=radix_oct[val%format];
val/=format;
}
break;
case DEC: //RADIX = Decimal
while (val>0)
{ // do until zero
s[i++]=radix_dec[val%format];
val/=format;
}
break;
case HEX: //RADIX = Hexadecimal
while (val>0)
{ // do until zero
s[i++]=radix_hex[val%format];
val/=format;
}
break;
default:
break;
}
s[i--]='\0'; // EOF
while (j<i)
{ // reverse strings array
char t;
t=s[j]; s[j]=s[i]; s[i]=t;
j++; i--;
}
print(s);
return ;
}
void USerial::write(const char *s, int length)
{
int n;
for(n=0;n<length;s++,n++)
{
write(*s);
}
return;
}
void USerial::println(const char *s)
{
print(s);
write ('\r');
write ('\n');
return;
}
void USerial::println(int val, RADIX_FORMAT format)
{
print(val,format);
write ('\r');
write ('\n');
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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