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LPC17xx platform for Cortex M port

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This commit is contained in:
Natie van Rooyen
2012-10-23 14:23:34 +02:00
parent 6f34e08e2f
commit 648d35dbe6
18 changed files with 7094 additions and 0 deletions
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1035
platforms/lpc17xx/drivers/lpc17xx.h Normal file
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platforms/lpc17xx/drivers/lpc17xx_uart.c Normal file
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/**************************************************************************//**
* @file lpc17xx_uart.c
* @brief Drivers for UART peripheral in lpc17xx.
* @version 1.0
* @date 18. Nov. 2010
*
* @note
* Copyright (C) 2010 NXP Semiconductors(NXP). All rights reserved.
*
* @par
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* products. This software is supplied "AS IS" without any warranties.
* NXP Semiconductors assumes no responsibility or liability for the
* use of the software, conveys no license or title under any patent,
* copyright, or mask work right to the product. NXP Semiconductors
* reserves the right to make changes in the software without
* notification. NXP Semiconductors also make no representation or
* warranty that such application will be suitable for the specified
* use without further testing or modification.
******************************************************************************/
#include <stdarg.h>
#include <stdio.h>
#include "lpc17xx_uart.h"
#include "lpc17xx.h"
/**
* @brief Initializes the UART0.
*
* @param baudrate: Specifies the baud rate
* @retval None
*/
void LPC17xx_UART_Init(uint32_t baudrate)
{
uint32_t Fdiv;
uint32_t pclkdiv, pclk;
/***/
LPC_PINCON->PINSEL0 &= ~0x000000F0;
LPC_PINCON->PINSEL0 |= 0x00000050; /* RxD0 and TxD0 */
/* PCLK_UART0=CCLK/2 */
//**LPC_SC->PCLKSEL1 &= ~(3<<6); /* PCLK_UART0 = CCLK/4 (18MHz) */
//**LPC_SC->PCLKSEL1 |= (2<<6); /* PCLK_UART0 = CCLK/2 (36MHz) */
//**pclk = SystemCoreClock/2;
/* By default, the PCLKSELx value is zero, thus, the PCLK for
all the peripherals is 1/4 of the SystemFrequency. */
/* Bit 6~7 is for UART0 */
pclkdiv = (LPC_SC->PCLKSEL0 >> 6) & 0x03;
switch ( pclkdiv )
{
case 0x00:
default:
pclk = SystemCoreClock/4;
break;
case 0x01:
pclk = SystemCoreClock;
break;
case 0x02:
pclk = SystemCoreClock/2;
break;
case 0x03:
pclk = SystemCoreClock/8;
break;
}
LPC_UART0->LCR = 0x83; /* 8 bits, no Parity, 1 Stop bit */
Fdiv = ( pclk / 16 ) / baudrate ; /*baud rate */
LPC_UART0->DLM = Fdiv / 256;
LPC_UART0->DLL = Fdiv % 256;
LPC_UART0->LCR = 0x03; /* DLAB = 0 */
LPC_UART0->FCR = 0x07; /* Enable and reset TX and RX FIFO. */
}
/**
* @brief Write one character to UART0.
*
* @param ch: Character to be written
* @retval None
*/
void LPC17xx_UART_PutChar (uint8_t ch)
{
while (!(LPC_UART0->LSR & 0x20));
LPC_UART0->THR = ch;
}
/**
* @brief Read one character from UART0 (blocking read).
*
* @param None
* @retval Received character
*/
uint8_t LPC17xx_UART_GetChar (void)
{
while (!(LPC_UART0->LSR & 0x01));
return (LPC_UART0->RBR);
}
/**
* @brief Read one character from UART0 (non blocking read).
*
* @param None
* @retval Received character
*/
uint8_t LPC17xx_UART_GetChar_nb (void)
{
if (LPC_UART0->LSR & 0x01)
return (LPC_UART0->RBR);
else
return 0;
}
/**
* @brief Write a string to UART0.
*
* @param str: NULL-terminated char string to be written
* @retval None
*/
void LPC17xx_UART_PutString (uint8_t *str)
{
/* usage: LPC1700_UART_Printf("xxx\n\r");*/
#if 1
while (*str != 0)
{
LPC17xx_UART_PutChar(*str++);
}
#else
/* usage: LPC1700_UART_Printf("xxx\n");*/
while ((*str) != 0) {
if (*str == '\n') {
LPC17xx_UART_PutChar(*str++);
LPC17xx_UART_PutChar('\r');
} else {
LPC17xx_UART_PutChar(*str++);
}
}
#endif
}
/**
* @brief Print formatted string. This function takes variable length arguments.
*
* @param format
* @param ...
* @retval None
*
* Note: using library functions "vsprintf" will increase the RO size by about 6KB
*/
//void LPC17xx_UART_Printf (const uint8_t *format, ...)
//{
// static uint8_t buffer[40 + 1];
// va_list vArgs;
//
// va_start(vArgs, format);
// vsprintf((char *)buffer, (char const *)format, vArgs);
// va_end(vArgs);
// LPC17xx_UART_PutString((uint8_t *) buffer);
//}
/* --------------------------------- End Of File ------------------------------ */

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platforms/lpc17xx/drivers/lpc17xx_uart.h Normal file
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/**************************************************************************//**
* @file lpc17xx_uart.h
* @brief Header file for lpc17xx_uart.c.
* @version 1.0
* @date 18. Nov. 2010
*
* @note
* Copyright (C) 2010 NXP Semiconductors(NXP). All rights reserved.
*
* @par
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* products. This software is supplied "AS IS" without any warranties.
* NXP Semiconductors assumes no responsibility or liability for the
* use of the software, conveys no license or title under any patent,
* copyright, or mask work right to the product. NXP Semiconductors
* reserves the right to make changes in the software without
* notification. NXP Semiconductors also make no representation or
* warranty that such application will be suitable for the specified
* use without further testing or modification.
******************************************************************************/
#ifndef __LPC17xx_UART_H_
#define __LPC17xx_UART_H_
#include <stdint.h>
/* external functions */
void LPC17xx_UART_PutChar (uint8_t);
uint8_t LPC17xx_UART_GetChar (void);
void LPC17xx_UART_Init(uint32_t baudrate);
//void LPC17xx_UART_Printf (const uint8_t *format, ...);
void LPC17xx_UART_PutString (uint8_t *str) ;
#endif // __LPC17xx_UART_H_
/* --------------------------------- End Of File ------------------------------ */