/**************************************************************************/

/*!

@file uart.c

@author K. Townsend

@section LICENSE

Software License Agreement (BSD License)

Copyright (c) 2013, K. Townsend (microBuilder.eu)

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 the name of the copyright holders 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 ''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 COPYRIGHT HOLDER 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 <string.h>

#include "uart.h"

void uart0Init(uint32_t baudRate)

{

uint32_t clk;

const uint32_t UARTCLKDIV=1;

/* Setup the clock and reset UART0 */

LPC_SYSCON->UARTCLKDIV = UARTCLKDIV;

NVIC_DisableIRQ(UART0_IRQn);

LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 14);

LPC_SYSCON->PRESETCTRL &= ~(1 << 3);

LPC_SYSCON->PRESETCTRL |= (1 << 3);

/* Configure UART0 */

clk = __MAIN_CLOCK/UARTCLKDIV;

LPC_USART0->CFG = UART_DATA_LENGTH_8 | UART_PARITY_NONE | UART_STOP_BIT_1;

LPC_USART0->BRG = clk / 16 / baudRate - 1;

LPC_SYSCON->UARTFRGDIV = 0xFF;

LPC_SYSCON->UARTFRGMULT = (((clk / 16) * (LPC_SYSCON->UARTFRGDIV + 1)) /

(baudRate * (LPC_USART0->BRG + 1))) - (LPC_SYSCON->UARTFRGDIV + 1);

/* Clear the status bits */

LPC_USART0->STAT = UART_STATUS_CTSDEL | UART_STATUS_RXBRKDEL;

/* Enable UART0 interrupt */

NVIC_EnableIRQ(UART0_IRQn);

/* Enable UART0 */

LPC_USART0->CFG |= UART_ENABLE;

}

void uart0SendChar(char buffer)

{

/* Wait until we're ready to send */

while (!(LPC_USART0->STAT & UART_STATUS_TXRDY));

LPC_USART0->TXDATA = buffer;

}

void uart0Send(char *buffer, uint32_t length)

{

while (length != 0)

{

uart0SendChar(*buffer);

buffer++;

length--;

}

}

void uart1Init(uint32_t baudRate)

{

uint32_t clk;

const uint32_t UARTCLKDIV=1;

/* Setup the clock and reset UART1 */

LPC_SYSCON->UARTCLKDIV = UARTCLKDIV;

NVIC_DisableIRQ(UART1_IRQn);

LPC_SYSCON->SYSAHBCLKCTRL |= UART1_CLK_ENABLE;

LPC_SYSCON->PRESETCTRL &= ~UART1_RST_N;

LPC_SYSCON->PRESETCTRL |= UART1_RST_N;

/* Configure UART1 */

clk = __MAIN_CLOCK/UARTCLKDIV;

LPC_USART1->CFG = UART_DATA_LENGTH_8 | UART_PARITY_NONE | UART_STOP_BIT_1;

LPC_USART1->BRG = clk / 16 / baudRate - 1;

LPC_SYSCON->UARTFRGDIV = 0xFF;

LPC_SYSCON->UARTFRGMULT = (((clk / 16) * (LPC_SYSCON->UARTFRGDIV + 1)) /

(baudRate * (LPC_USART0->BRG + 1))) - (LPC_SYSCON->UARTFRGDIV + 1);

/* Clear the status bits */

LPC_USART1->STAT = UART_STATUS_CTSDEL | UART_STATUS_RXBRKDEL;

/* Enable UART1 interrupt */

NVIC_EnableIRQ(UART1_IRQn);

/* Enable UART1 */

LPC_USART1->CFG |= UART_ENABLE;

}

void uart1SendChar(char buffer)

{

/* Wait until we're ready to send */

while (!(LPC_USART1->STAT & UART_STATUS_TXRDY));

LPC_USART1->TXDATA = buffer;

}

void uart1Send(char *buffer, uint32_t length)

{

while (length != 0) {

uart1SendChar(*buffer);

buffer++;

length--;

}

}

void uart2Init(uint32_t baudRate)

{

uint32_t clk;

const uint32_t UARTCLKDIV=1;

/* Setup the clock and reset UART2 */

LPC_SYSCON->UARTCLKDIV = UARTCLKDIV;

NVIC_DisableIRQ(UART2_IRQn);

LPC_SYSCON->SYSAHBCLKCTRL |= UART2_CLK_ENABLE;

LPC_SYSCON->PRESETCTRL &= ~UART2_RST_N;

LPC_SYSCON->PRESETCTRL |= UART2_RST_N;

/* Configure UART2 */

clk = __MAIN_CLOCK/UARTCLKDIV;

LPC_USART2->CFG = UART_DATA_LENGTH_8 | UART_PARITY_NONE | UART_STOP_BIT_1;

LPC_USART2->BRG = clk / 16 / baudRate - 1;

LPC_SYSCON->UARTFRGDIV = 0xFF;

LPC_SYSCON->UARTFRGMULT = (((clk / 16) * (LPC_SYSCON->UARTFRGDIV + 1)) /

(baudRate * (LPC_USART0->BRG + 1))) - (LPC_SYSCON->UARTFRGDIV + 1);

/* Clear the status bits */

LPC_USART2->STAT = UART_STATUS_CTSDEL | UART_STATUS_RXBRKDEL;

/* Enable UART1 interrupt */

NVIC_EnableIRQ(UART2_IRQn);

/* Enable UART2 */

LPC_USART2->CFG |= UART_ENABLE;

}

void uart2SendChar(char buffer)

{

/* Wait until we're ready to send */

while (!(LPC_USART2->STAT & UART_STATUS_TXRDY));

LPC_USART2->TXDATA = buffer;

}

void uart2Send(char *buffer, uint32_t length)

{

while (length != 0) {

uart2SendChar(*buffer);

buffer++;

length--;

}

}