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Libuc make templates extracted from main script, to make it more modular
Libuc make templates extracted from main script, to make it more modular
jeandet - - Load All Authors

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uart.c
191 lines | 4.5 KiB | text/x-c | CLexer
/ lib / src / lpc17XX / UART / uart.c
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jeandet
lpc17XX Rules OK, Makefile generator OK
 r1 /*------------------------------------------------------------------------------
-- This file is a part of the libuc, microcontroler library
-- Copyright (C) 2011, Alexis Jeandet
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-------------------------------------------------------------------------------
-- Author : Alexis Jeandet
-- Mail : alexis.jeandet@gmail.com
-------------------------------------------------------------------------------*/
jeandet
Core library added, dynamic cpu freq setting enabled, Mbed bsp started, uart lib almost complete for lpc17XX
 r4 #include "core.h"
jeandet
lpc17XX Rules OK, Makefile generator OK
 r1 #include "uart.h"
void uartputc(uartDev* dev,char c) {
while (!((dev->LineStat & (1<<5))));
dev->RWreg = c;
}
char uartgetc(uartDev* dev) {
while (!((dev->LineStat & 1)));
return (char)dev->RWreg;
}
void uartputs(uartDev* dev,char *s) {
while (*s) uartputc(dev,*s++);
}
void uartgets(uartDev* dev,char *s) {
while (*s && (*s!=0xd)) *s++ = uartgetc(dev);
}
jeandet
Core library added, dynamic cpu freq setting enabled, Mbed bsp started, uart lib almost complete for lpc17XX
 r4 void uartoff(int count)
{
switch(count)
{
case 0:
LPC_SC->PCONP &= ~( 1 << 3 );
break;
case 1:
LPC_SC->PCONP &= ~( 1 << 4 );
break;
case 2:
LPC_SC->PCONP &= ~( 1 << 24 );
break;
case 3:
LPC_SC->PCONP &= ~( 1 << 25 );
break;
default:
break;
}
}
void uarton(int count)
{
switch(count)
{
case 0:
LPC_SC->PCONP |= ( 1 << 3 );
break;
case 1:
LPC_SC->PCONP |= ( 1 << 4 );
break;
case 2:
LPC_SC->PCONP |= ( 1 << 24 );
break;
case 3:
LPC_SC->PCONP |= ( 1 << 25 );
break;
default:
break;
}
}
void uartsetup(uartDev* dev,unsigned int baudRate,unsigned char WordLength,unsigned char StopBitCnt,unsigned char Parity)
{
if(WordLength>9)WordLength=8;
if((StopBitCnt>2)||(StopBitCnt==0))StopBitCnt=1;
if(Parity>7)Parity=0;
dev->LineCtrl = (WordLength-5) + ((StopBitCnt-1)<<2) + (Parity<<3);
uartsetbaudrate(dev,baudRate);
}
unsigned char uartgetpclkfactor(uartDev* dev)
{
unsigned int clksel=0;
const char clkselDec[]={4,1,2,8};
switch((int)dev)
{
case (int)LPC_UART0_BASE:
clksel = (LPC_SC->PCLKSEL0>>6) & 3;
break;
case (int)LPC_UART1_BASE:
clksel = (LPC_SC->PCLKSEL0>>8) & 3;
break;
case (int)LPC_UART2_BASE:
clksel = (LPC_SC->PCLKSEL1>>16) & 3;
break;
case (int)LPC_UART3_BASE:
clksel = (LPC_SC->PCLKSEL1>>18) & 3;
break;
default:
break;
}
return clkselDec[clksel];
}
void uartsetpclkfactor(uartDev* dev,unsigned char pclkfactor)
{
const char clkselDec[]={1,1,2,2,0,0,0,0,3};
unsigned int clksel=0;
switch((int)dev)
{
case (int)LPC_UART0_BASE:
LPC_SC->PCLKSEL0 |= clkselDec[pclkfactor]<<6;
LPC_SC->PCLKSEL0 &= clkselDec[pclkfactor]<<6;
break;
case (int)LPC_UART1_BASE:
LPC_SC->PCLKSEL0 |= clkselDec[pclkfactor]<<8;
LPC_SC->PCLKSEL0 &= clkselDec[pclkfactor]<<8;
break;
case (int)LPC_UART2_BASE:
LPC_SC->PCLKSEL1 |= clkselDec[pclkfactor]<<16;
LPC_SC->PCLKSEL1 &= clkselDec[pclkfactor]<<16;
break;
case (int)LPC_UART3_BASE:
LPC_SC->PCLKSEL1 |= clkselDec[pclkfactor]<<18;
LPC_SC->PCLKSEL1 &= clkselDec[pclkfactor]<<18;
break;
default:
break;
}
}
void uartsetbaudrate(uartDev* dev,unsigned int baudRate)
{
unsigned int pclk = 0;
unsigned int clksel=0;
unsigned int cpuclk=0;
if(dev==0)return;
cpuclk = coregetCpuFreq();
pclk = cpuclk / uartgetpclkfactor(dev);
while((baudRate*16)>pclk)
{
unsigned char pclkfact= uartgetpclkfactor(dev);
if(pclkfact==1)return;
uartsetpclkfactor(dev,pclkfact/2);
pclk = cpuclk / uartgetpclkfactor(dev);
}
dev->LineCtrl |= 128;
dev->RWreg = pclk/(baudRate*16);
dev->LineCtrl &= ~(128);
}
jeandet
lpc17XX Rules OK, Makefile generator OK
 r1
uartDev* uartopen(int count){
uartDev* dev;
switch(count)
{
case 0:
dev = (uartDev*)((unsigned long)LPC_UART0_BASE);
break;
case 1:
dev = (uartDev*)((unsigned long)LPC_UART1_BASE);
break;
case 2:
dev = (uartDev*)((unsigned long)LPC_UART2_BASE);
break;
case 3:
dev = (uartDev*)((unsigned long)LPC_UART3_BASE);
break;
default:
dev = (uartDev*)0;
break;
}
return dev;
}