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/*------------------------------------------------------------------------------
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-- This file is a part of the libuc, microcontroler library
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-- Copyright (C) 2011, Alexis Jeandet
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-------------------------------------------------------------------------------
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-- Author : Alexis Jeandet
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-- Mail : alexis.jeandet@gmail.com
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-------------------------------------------------------------------------------*/
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#include "core.h"
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#include "uart.h"
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void uartputc(uartDev dev,char c) {
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while (!((((_uartDev)dev)->LineStat & (1<<5))));
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((_uartDev)dev)->RWreg = c;
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}
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char uartgetc(uartDev dev) {
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while (!((((_uartDev)dev)->LineStat & 1)));
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return (char)((_uartDev)dev)->RWreg;
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}
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void uartputs(uartDev dev,char *s) {
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while (*s) uartputc(dev,*s++);
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}
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void uartgets(uartDev dev,char *s) {
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while (*s && (*s!=0xd)) *s++ = uartgetc(dev);
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}
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void uartoff(int count)
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{
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switch(count)
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{
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case 0:
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LPC_SC->PCONP &= ~( 1 << 3 );
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break;
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case 1:
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LPC_SC->PCONP &= ~( 1 << 4 );
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break;
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case 2:
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LPC_SC->PCONP &= ~( 1 << 24 );
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break;
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case 3:
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LPC_SC->PCONP &= ~( 1 << 25 );
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break;
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default:
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break;
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}
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}
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void uarton(int count)
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{
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switch(count)
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{
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case 0:
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LPC_SC->PCONP |= ( 1 << 3 );
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break;
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case 1:
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LPC_SC->PCONP |= ( 1 << 4 );
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break;
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case 2:
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LPC_SC->PCONP |= ( 1 << 24 );
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break;
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case 3:
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LPC_SC->PCONP |= ( 1 << 25 );
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break;
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default:
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break;
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}
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}
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void uartsetup(uartDev dev,unsigned int baudRate,unsigned char WordLength,unsigned char StopBitCnt,unsigned char Parity)
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{
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if(WordLength>9)WordLength=8;
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if((StopBitCnt>2)||(StopBitCnt==0))StopBitCnt=1;
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if(Parity>7)Parity=0;
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((_uartDev)dev)->LineCtrl = (WordLength-5) + ((StopBitCnt-1)<<2) + (Parity<<3);
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uartsetbaudrate(dev,baudRate);
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}
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unsigned char uartgetpclkfactor(uartDev dev)
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{
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unsigned int clksel=0;
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const char clkselDec[]={4,1,2,8};
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switch((int)dev)
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{
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case (int)LPC_UART0_BASE:
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clksel = (LPC_SC->PCLKSEL0>>6) & 3;
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break;
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case (int)LPC_UART1_BASE:
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clksel = (LPC_SC->PCLKSEL0>>8) & 3;
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break;
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case (int)LPC_UART2_BASE:
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clksel = (LPC_SC->PCLKSEL1>>16) & 3;
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break;
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case (int)LPC_UART3_BASE:
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clksel = (LPC_SC->PCLKSEL1>>18) & 3;
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break;
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default:
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break;
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}
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return clkselDec[clksel];
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}
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void uartsetpclkfactor(uartDev dev,unsigned char pclkfactor)
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{
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const char clkselDec[]={1,1,2,2,0,0,0,0,3};
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unsigned int clksel=0;
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switch((int)dev)
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{
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case (int)LPC_UART0_BASE:
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LPC_SC->PCLKSEL0 |= clkselDec[pclkfactor]<<6;
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LPC_SC->PCLKSEL0 &= clkselDec[pclkfactor]<<6;
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break;
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case (int)LPC_UART1_BASE:
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LPC_SC->PCLKSEL0 |= clkselDec[pclkfactor]<<8;
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LPC_SC->PCLKSEL0 &= clkselDec[pclkfactor]<<8;
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break;
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case (int)LPC_UART2_BASE:
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LPC_SC->PCLKSEL1 |= clkselDec[pclkfactor]<<16;
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LPC_SC->PCLKSEL1 &= clkselDec[pclkfactor]<<16;
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break;
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case (int)LPC_UART3_BASE:
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LPC_SC->PCLKSEL1 |= clkselDec[pclkfactor]<<18;
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LPC_SC->PCLKSEL1 &= clkselDec[pclkfactor]<<18;
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break;
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default:
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break;
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}
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}
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void uartsetbaudrate(uartDev dev,unsigned int baudRate)
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{
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unsigned int pclk = 0;
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unsigned int clksel=0;
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unsigned int cpuclk=0;
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if(dev==0)return;
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cpuclk = coregetCpuFreq();
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pclk = cpuclk / uartgetpclkfactor(dev);
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while((baudRate*16)>pclk)
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{
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unsigned char pclkfact= uartgetpclkfactor(dev);
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if(pclkfact==1)return;
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uartsetpclkfactor(dev,pclkfact/2);
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pclk = cpuclk / uartgetpclkfactor(dev);
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}
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((_uartDev)dev)->LineCtrl |= 128;
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((_uartDev)dev)->RWreg = pclk/(baudRate*16);
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((_uartDev)dev)->LineCtrl &= ~(128);
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}
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uartDev uartopen(int count){
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uartDev dev;
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switch(count)
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{
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case 0:
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dev = (uartDev)((unsigned long)LPC_UART0_BASE);
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break;
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case 1:
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dev = (uartDev)((unsigned long)LPC_UART1_BASE);
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break;
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case 2:
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dev = (uartDev)((unsigned long)LPC_UART2_BASE);
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break;
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case 3:
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dev = (uartDev)((unsigned long)LPC_UART3_BASE);
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break;
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default:
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dev = (uartDev)0;
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break;
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}
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return dev;
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}
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