ARM 2440裸奔实现电子时钟

ID:112317 · 发表于 2016-4-7 01:20

2440 ARM裸奔实现电子时钟，对我们学习ARM体系很有帮助，原创全部源码下载：

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//===================================================================
// File Name : 2440lib.c
// Function : S3C2410 PLL,Uart, LED, Port Init
// Date : March 20, 2002
// Version : 0.0
// History
// 0.0 : Programming start (February 20,2002) -> SOP
//===================================================================
#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
extern char Image$RW$Limit[];
void *mallocPt=Image$RW$Limit;
//***************************[ SYSTEM ]***************************************************
void Delay(int time)
{
U32 val = (PCLK>>3)/1000-1;
rTCFG0 &= ~(0xff<<8);
rTCFG0 |= 3<<8; //prescaler = 3+1
rTCFG1 &= ~(0xf<<12);
rTCFG1 |= 0<<12; //mux = 1/2
rTCNTB3 = val;
rTCMPB3 = val>>1; // 50%
rTCON &= ~(0xf<<16);
rTCON |= 0xb<<16; //interval, inv-off, update TCNTB3&TCMPB3, start timer 3
rTCON &= ~(2<<16); //clear manual update bit
while(time--) {
while(rTCNTO3>=val>>1);
while(rTCNTO3<val>>1);
};
}
//***************************[ PORTS ]****************************************************
void Port_Init0(void)
{
//CAUTION:Follow the configuration order for setting the ports.
// 1) setting value(GPnDAT)
// 2) setting control register (GPnCON)
// 3) configure pull-up resistor(GPnUP)
//32bit data bus configuration
//*** PORT A GROUP
//Ports : GPA22 GPA21 GPA20 GPA19 GPA18 GPA17 GPA16 GPA15 GPA14 GPA13 GPA12
//Signal : nFCE nRSTOUT nFRE nFWE ALE CLE nGCS5 nGCS4 nGCS3 nGCS2 nGCS1
//Binary : 1 1 1 , 1 1 1 1 , 1 1 1 1
//Ports : GPA11 GPA10 GPA9 GPA8 GPA7 GPA6 GPA5 GPA4 GPA3 GPA2 GPA1 GPA0
//Signal : ADDR26 ADDR25 ADDR24 ADDR23 ADDR22 ADDR21 ADDR20 ADDR19 ADDR18 ADDR17 ADDR16 ADDR0
//Binary : 1 1 1 1 , 1 1 1 1 , 1 1 1 1
rGPACON = 0x7fffff;
//**** PORT B GROUP
//Ports : GPB10 GPB9 GPB8 GPB7 GPB6 GPB5 GPB4 GPB3 GPB2 GPB1 GPB0
//Signal : nXDREQ0 nXDACK0 nXDREQ1 nXDACK1 nSS_KBD nDIS_OFF L3CLOCK L3DATA L3MODE nIrDATXDEN Keyboard
//Setting: INPUT OUTPUT INPUT OUTPUT INPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT
//Binary : 00 , 01 00 , 01 00 , 01 01 , 01 01 , 01 01
rGPBCON = 0x044555;
rGPBUP = 0x7ff; // The pull up function is disabled GPB[10:0]
//*** PORT C GROUP for youlong
//Ports : GPC15 GPC14 GPC13 GPC12 GPC11 GPC10 GPC9 GPC8 GPC7 GPC6 GPC5 GPC4 GPC3 GPC2 GPC1 GPC0
//Signal : VD7 VD6 VD5 VD4 VD3 VD2 VD1 VD0 LCDVF2 LCDVF1 LCDVF0 VM VFRAME VLINE VCLK LEND
//Binary : 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10
rGPCCON = 0xaaaaaaaa;
rGPCUP = 0xffff; // The pull up function is disabled GPC[15:0]
//*** PORT D GROUP
//Ports : GPD15 GPD14 GPD13 GPD12 GPD11 GPD10 GPD9 GPD8 GPD7 GPD6 GPD5 GPD4 GPD3 GPD2 GPD1 GPD0
//Signal : VD23 VD22 VD21 VD20 VD19 VD18 VD17 VD16 VD15 VD14 VD13 VD12 VD11 VD10 VD9 VD8
//Binary : 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10 ,10 10
rGPDCON = 0xaaaaaaaa;
rGPDUP = 0xffff; // The pull up function is disabled GPD[15:0]
//*** PORT E GROUP
//Ports : GPE15 GPE14 GPE13 GPE12 GPE11 GPE10 GPE9 GPE8 GPE7 GPE6 GPE5 GPE4
//Signal : IICSDA IICSCL SPICLK SPIMOSI SPIMISO SDDATA3 SDDATA2 SDDATA1 SDDATA0 SDCMD SDCLK IN
//Binary : 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 00 ,
//-------------------------------------------------------------------------------------------------------
//Ports : GPE3 GPE2 GPE1 GPE0
//Signal : IN IN IN IN
//Binary : 00 00 , 00 00
//rGPECON = 0xaaaaaaaa;
//rGPEUP = 0xffff; // The pull up function is disabled GPE[15:0]
rGPECON = 0xaaaaa800; // For added AC97 setting
rGPEUP = 0xffff;
//*** PORT F GROUP
//Ports : GPF7 GPF6 GPF5 GPF4 GPF3 GPF2 GPF1 GPF0
//Signal : nLED_8 nLED_4 nLED_2 nLED_1 nIRQ_PCMCIA EINT2 KBDINT EINT0
//Setting: Output Output Output Output EINT3 EINT2 EINT1 EINT0
//Binary : 01 01 , 01 01 , 10 10 , 10 10
rGPFCON = 0x55aa;
rGPFUP = 0xff; // The pull up function is disabled GPF[7:0]
//*** PORT G GROUP
//Ports : GPG15 GPG14 GPG13 GPG12 GPG11 GPG10 GPG9 GPG8 GPG7 GPG6
//Signal : nYPON YMON nXPON XMON EINT19 DMAMODE1 DMAMODE0 DMASTART KBDSPICLK KBDSPIMOSI
//Setting: nYPON YMON nXPON XMON EINT19 Output Output Output SPICLK1 SPIMOSI1
//Binary : 11 11 , 11 11 , 10 01 , 01 01 , 11 11
//-----------------------------------------------------------------------------------------
//Ports : GPG5 GPG4 GPG3 GPG2 GPG1 GPG0
//Signal : KBDSPIMISO LCD_PWREN EINT11 nSS_SPI IRQ_LAN IRQ_PCMCIA
//Setting: SPIMISO1 LCD_PWRDN EINT11 nSS0 EINT9 EINT8
//Binary : 11 11 , 10 11 , 10 10
rGPGCON = 0xff95ffba;
rGPGUP = 0xffff; // The pull up function is disabled GPG[15:0]
//*** PORT H GROUP
//Ports : GPH10 GPH9 GPH8 GPH7 GPH6 GPH5 GPH4 GPH3 GPH2 GPH1 GPH0
//Signal : CLKOUT1 CLKOUT0 UCLK nCTS1 nRTS1 RXD1 TXD1 RXD0 TXD0 nRTS0 nCTS0
//Binary : 10 , 10 10 , 11 11 , 10 10 , 10 10 , 10 10
rGPHCON = 0x2afaaa;
rGPHUP = 0x7ff; // The pull up function is disabled GPH[10:0]
// Added for S3C2440X, DonGo
//*** PORT J GROUP
//Ports : GPJ12 GPJ11 GPJ10 GPJ9 GPJ8 GPJ7 GPJ6 GPJ5 GPJ4 GPJ3 GPJ2 GPJ1 GPJ0
//Signal : CAMRESET CAMPCLKOUT CAMHREF CAMVSYNC CAMPCLKIN CAMDAT[7] CAMDAT[6] CAMDAT[5] CAMDAT[4] CAMDAT[3] CAMDAT[2] CAMDAT[1] CAMDAT[0]
//Binary : 10 10 10 10 10 10 10 10 10 10 10 10 10
rGPJCON = 0x02aaaaaa;
rGPJUP = 0x1fff; // The pull up function is disabled GPH[10:0]
//External interrupt will be falling edge triggered.
rEXTINT0 = 0x22222222; // EINT[7:0]
rEXTINT1 = 0x22222222; // EINT[15:8]
rEXTINT2 = 0x22222222; // EINT[23:16]
}
void Port_Init(void)
{
//CAUTION:Follow the configuration order for setting the ports.
// 1) setting value(GPnDAT)
// 2) setting control register (GPnCON)
// 3) configure pull-up resistor(GPnUP)
//32bit data bus configuration
//*** PORT A GROUP
//Ports : GPA22 GPA21 GPA20 GPA19 GPA18 GPA17 GPA16 GPA15 GPA14 GPA13 GPA12
//Signal : nFCE nRSTOUT nFRE nFWE ALE CLE nGCS5 nGCS4 nGCS3 nGCS2 nGCS1
//Binary : 1 1 1 , 1 1 1 1 , 1 1 1 1
//Ports : GPA11 GPA10 GPA9 GPA8 GPA7 GPA6 GPA5 GPA4 GPA3 GPA2 GPA1 GPA0
//Signal : ADDR26 ADDR25 ADDR24 ADDR23 ADDR22 ADDR21 ADDR20 ADDR19 ADDR18 ADDR17 ADDR16 ADDR0
//Binary : 1 1 1 1 , 1 1 1 1 , 1 1 1 1
rGPACON = 0x7fffff;
//**** PORT B GROUP
//Ports : GPB10 GPB9 GPB8 GPB7 GPB6 GPB5 GPB4 GPB3 GPB2 GPB1 GPB0
//Signal : nXDREQ0 nXDACK0 nXDREQ1 nXDACK1 nSS_KBD nDIS_OFF L3CLOCK L3DATA L3MODE nIrDATXDEN Keyboard
//Setting: INPUT OUTPUT INPUT OUTPUT INPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT
//Binary : 00 , 01 00 , 01 00 , 01 01 , 01 01 , 01 01
//rGPBCON = 0x000150;(youlong)
rGPBCON = 0x015550;
rGPBUP = 0x7ff; // The pull up function is disabled GPB[10:0]
//*** PORT C GROUP for youlong
//Ports : GPC15 GPC14 GPC13 GPC12 GPC11 GPC10 GPC9 GPC8 GPC7 GPC6 GPC5 GPC4 GPC3 GPC2 GPC1 GPC0
//Signal : VD7 VD6 VD5 VD4 VD3 VD2 VD1 VD0 LCDVF2 LCDVF1 LCDVF0 VM VFRAME VLINE VCLK LEND
//Binary : 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10
//rGPCCON = 0xaaaaaaaa;
//rGPCUP = 0xffff; // The pull up function is disabled GPC[15:0]
//*** PORT C GROUP
//Ports : GPC15 GPC14 GPC13 GPC12 GPC11 GPC10 GPC9 GPC8 GPC7 GPC6 GPC5 GPC4 GPC3 GPC2 GPC1 GPC0
//Signal : VD7 VD6 VD5 VD4 VD3 VD2 VD1 VD0 LCDVF2 LCDVF1 LCDVF0 VM VFRAME VLINE VCLK LEND
//Binary : 10 10 , 10 10 , 10 10 , 10 01 , 01 01 , 01 10 , 10 10 , 10 10
rGPCCON = 0xaaa956aa;
rGPCUP = 0xffff; // The pull up function is disabled GPC[15:0]
//*** PORT D GROUP
//Ports : GPD15 GPD14 GPD13 GPD12 GPD11 GPD10 GPD9 GPD8 GPD7 GPD6 GPD5 GPD4 GPD3 GPD2 GPD1 GPD0
//Signal : VD23 VD22 VD21 VD20 VD19 VD18 VD17 VD16 VD15 VD14 VD13 VD12 VD11 VD10 VD9 VD8
//Binary : 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 10 ,10 10
rGPDCON = 0xaaaaaaaa;
rGPDUP = 0xffff; // The pull up function is disabled GPD[15:0]
//*** PORT E GROUP
//Ports : GPE15 GPE14 GPE13 GPE12 GPE11 GPE10 GPE9 GPE8 GPE7 GPE6 GPE5 GPE4
//Signal : IICSDA IICSCL SPICLK SPIMOSI SPIMISO SDDATA3 SDDATA2 SDDATA1 SDDATA0 SDCMD SDCLK IN
//Binary : 10 10 , 10 10 , 10 10 , 10 10 , 10 10 , 10 00 ,
//-------------------------------------------------------------------------------------------------------
//Ports : GPE3 GPE2 GPE1 GPE0
//Signal : IN IN IN IN
//Binary : 00 00 , 00 00
//rGPECON = 0xaaaaaaaa;
//rGPEUP = 0xffff; // The pull up function is disabled GPE[15:0]
rGPECON = 0xa02aa800; // For added AC97 setting
rGPEUP = 0xffff;
//*** PORT F GROUP
//Ports : GPF7 GPF6 GPF5 GPF4 GPF3 GPF2 GPF1 GPF0
//Signal : nLED_8 nLED_4 nLED_2 nLED_1 nIRQ_PCMCIA EINT2 KBDINT EINT0
//Setting: Output Output Output Output EINT3 EINT2 EINT1 EINT0
//Binary : 01 01 , 01 01 , 10 10 , 10 10
rGPFCON = 0x55aa;
rGPFUP = 0xff; // The pull up function is disabled GPF[7:0]
//*** PORT G GROUP
//Ports : GPG15 GPG14 GPG13 GPG12 GPG11 GPG10 GPG9 GPG8 GPG7 GPG6
//Signal : nYPON YMON nXPON XMON EINT19 DMAMODE1 DMAMODE0 DMASTART KBDSPICLK KBDSPIMOSI
//Setting: nYPON YMON nXPON XMON EINT19 Output Output Output SPICLK1 SPIMOSI1
//Binary : 11 11 , 11 11 , 10 01 , 01 01 , 11 11
//-----------------------------------------------------------------------------------------
//Ports : GPG5 GPG4 GPG3 GPG2 GPG1 GPG0
//Signal : KBDSPIMISO LCD_PWREN EINT11 nSS_SPI IRQ_LAN IRQ_PCMCIA
//Setting: SPIMISO1 LCD_PWRDN EINT11 nSS0 EINT9 EINT8
//Binary : 11 11 , 10 11 , 10 10
rGPGCON = 0x00a2aaaa;// GPG9 input without pull-up
rGPGUP = 0xffff; // The pull up function is disabled GPG[15:0]
//*** PORT H GROUP
//Ports : GPH10 GPH9 GPH8 GPH7 GPH6 GPH5 GPH4 GPH3 GPH2 GPH1 GPH0
//Signal : CLKOUT1 CLKOUT0 UCLK nCTS1 nRTS1 RXD1 TXD1 RXD0 TXD0 nRTS0 nCTS0
//Binary : 10 , 10 10 , 11 11 , 10 10 , 10 10 , 10 10
rGPHCON = 0x00faaa;
rGPHUP = 0x7ff; // The pull up function is disabled GPH[10:0]
// Added for S3C2440X, DonGo
//*** PORT J GROUP
//Ports : GPJ12 GPJ11 GPJ10 GPJ9 GPJ8 GPJ7 GPJ6 GPJ5 GPJ4 GPJ3 GPJ2 GPJ1 GPJ0
//Signal : CAMRESET CAMPCLKOUT CAMHREF CAMVSYNC CAMPCLKIN CAMDAT[7] CAMDAT[6] CAMDAT[5] CAMDAT[4] CAMDAT[3] CAMDAT[2] CAMDAT[1] CAMDAT[0]
//Binary : 10 10 10 10 10 10 10 10 10 10 10 10 10
rGPJCON = 0x02aaaaaa;
rGPJUP = 0x1fff; // The pull up function is disabled GPH[10:0]
//External interrupt will be falling edge triggered.
rEXTINT0 = 0x22222222; // EINT[7:0]
rEXTINT1 = 0x22222222; // EINT[15:8]
rEXTINT2 = 0x22222222; // EINT[23:16]
}
//***************************[ UART ]******************************
static int whichUart=0;
void Uart_Init(int pclk,int baud)
{
int i;
if(pclk == 0)
pclk = PCLK;
rUFCON0 = 0x0; //UART channel 0 FIFO control register, FIFO disable
rUFCON1 = 0x0; //UART channel 1 FIFO control register, FIFO disable
rUFCON2 = 0x0; //UART channel 2 FIFO control register, FIFO disable
rUMCON0 = 0x0; //UART chaneel 0 MODEM control register, AFC disable
rUMCON1 = 0x0; //UART chaneel 1 MODEM control register, AFC disable
//UART0
rULCON0 = 0x3; //Line control register : Normal,No parity,1 stop,8 bits
// [10] [9] [8] [7] [6] [5] [4] [3:2] [1:0]
// Clock Sel, Tx Int, Rx Int, Rx Time Out, Rx err, Loop-back, Send break, Transmit Mode, Receive Mode
// 0 1 0 , 0 1 0 0 , 01 01
// PCLK Level Pulse Disable Generate Normal Normal Interrupt or Polling
rUCON0 = 0x245; // Control register
rUBRDIV0=( (int)(pclk/16./baud+0.5) -1 ); //Baud rate divisior register 0
//UART1
rULCON1 = 0x3;
rUCON1 = 0x245;
rUBRDIV1=( (int)(pclk/16./baud+0.5) -1 );
//UART2
rULCON2 = 0x3;
rUCON2 = 0x245;
rUBRDIV2=( (int)(pclk/16./baud+0.5) -1 );
for(i=0;i<100;i++);
}
//===================================================================
void Uart_Select(int ch)
{
whichUart = ch;
}
//===================================================================
void Uart_TxEmpty(int ch)
{
if(ch==0)
while(!(rUTRSTAT0 & 0x4)); //Wait until tx shifter is empty.
else if(ch==1)
while(!(rUTRSTAT1 & 0x4)); //Wait until tx shifter is empty.
else if(ch==2)
while(!(rUTRSTAT2 & 0x4)); //Wait until tx shifter is empty.
}
//=====================================================================
char Uart_Getch(void)
{
if(whichUart==0)
{
while(!(rUTRSTAT0 & 0x1)); //Receive data ready
return RdURXH0();
}
else if(whichUart==1)
{
while(!(rUTRSTAT1 & 0x1)); //Receive data ready
return RdURXH1();
}
else if(whichUart==2)
{
while(!(rUTRSTAT2 & 0x1)); //Receive data ready
return RdURXH2();
}
return 0 ;
}
//====================================================================
char Uart_GetKey(void)
{
if(whichUart==0)
{
if(rUTRSTAT0 & 0x1) //Receive data ready
return RdURXH0();
else
return 0;
}
else if(whichUart==1)
{
if(rUTRSTAT1 & 0x1) //Receive data ready
return RdURXH1();
else
return 0;
}
else if(whichUart==2)
{
if(rUTRSTAT2 & 0x1) //Receive data ready
return RdURXH2();
else
return 0;
}
return 0 ;
}
//====================================================================
void Uart_GetString(char *string)
{
char *string2 = string;
char c;
while((c = Uart_Getch())!='\r')
{
if(c=='\b')
{
if( (int)string2 < (int)string )
{
Uart_Printf("\b \b");
string--;
}
}
else
{
*string++ = c;
Uart_SendByte(c);
}
}
*string='\0';
Uart_SendByte('\n');
}
//=====================================================================
int Uart_GetIntNum(void)
{
char str[30];
char *string = str;
int base = 10;
int minus = 0;
int result = 0;
int lastIndex;
int i;
Uart_GetString(string);
if(string[0]=='-')
{
minus = 1;
string++;
}
if(string[0]=='0' && (string[1]=='x' || string[1]=='X'))
{
base = 16;
string += 2;
}
lastIndex = strlen(string) - 1;
if(lastIndex<0)
return -1;
if(string[lastIndex]=='h' || string[lastIndex]=='H' )
{
base = 16;
string[lastIndex] = 0;
lastIndex--;
}
if(base==10)
{
result = atoi(string);
result = minus ? (-1*result):result;
}
else
{
for(i=0;i<=lastIndex;i++)
{
if(isalpha(string[i]))
{
if(isupper(string[i]))
result = (result<<4) + string[i] - 'A' + 10;
else
result = (result<<4) + string[i] - 'a' + 10;
}
else
result = (result<<4) + string[i] - '0';
}
result = minus ? (-1*result):result;
}
return result;
}
//*****************************************************************************
//get a number for the uart
//*****************************************************************************
int Uart_GetIntNum_GJ(void)
{
char string[16] ;
char *p_string = string ;
char c;
int i = 0 ;
int data = 0 ;
while( ( c = Uart_Getch()) != '\r' )
{
if(c=='\b') p_string--;
else *p_string++=c;
Uart_SendByte( c ) ;
}
*p_string = '\0';
i = 0 ;
while( string[i] != '\0' )
{
data = data * 10 ;
if( string[i]<'0'||string[i]>'9' )
return -1 ;
data = data + ( string[i]-'0' ) ;
i++ ;
}
return data ;
}
//*****************************************************************************
//=====================================================================
void Uart_SendByte(int data)
{
if(whichUart==0)
{
if(data=='\n')
{
while(!(rUTRSTAT0 & 0x2));
// Delay(1); //because the slow response of hyper_terminal
WrUTXH0('\r');
}
while(!(rUTRSTAT0 & 0x2)); //Wait until THR is empty.
// Delay(1);
WrUTXH0(data);
}
else if(whichUart==1)
{
if(data=='\n')
{
while(!(rUTRSTAT1 & 0x2));
//Delay(1); //because the slow response of hyper_terminal
rUTXH1 = '\r';
}
while(!(rUTRSTAT1 & 0x2)); //Wait until THR is empty.
//Delay(1);
rUTXH1 = data;
}
else if(whichUart==2)
{
if(data=='\n')
{
while(!(rUTRSTAT2 & 0x2));
//Delay(1); //because the slow response of hyper_terminal
rUTXH2 = '\r';
}
while(!(rUTRSTAT2 & 0x2)); //Wait until THR is empty.
//Delay(1);
rUTXH2 = data;
}
}
//====================================================================
void Uart_SendString(char *pt)
{
while(*pt)
Uart_SendByte(*pt++);
}
//=====================================================================
//If you don't use vsprintf(), the code size is reduced very much.
void Uart_Printf(char *fmt,...)
{
va_list ap;
char string[256];
va_start(ap,fmt);
vsprintf(string,fmt,ap);
Uart_SendString(string);
va_end(ap);
}
//**************************[ BOARD LED ]*********************************
void Led_Display(int data)
{
//Active is low.(LED On)
// GPF7 GPF6 GPF5 GPF4
//nLED_8 nLED4 nLED_2 nLED_1
// rGPFDAT = (rGPFDAT & 0xf) | !((data & 0xf)<<4);
// rGPFDAT = (rGPFDAT & ~(0xf<<4)) | ((~data & 0xf)<<4);
//Active is low.(LED On)
// GPF7 GPF6 GPF5 GPF4
//nLED_8 nLED4 nLED_2 nLED_1
// rGPFDAT = (rGPFDAT & 0xf) | !((data & 0xf)<<4);
rGPBDAT = (rGPBDAT & ~(0xf<<5)) | ((~data & 0xf)<<5);
//rGPCDAT = (rGPBDAT & ~(0xf<<5)) | ((~data & 0xf0)<<5);
}
//***************************[ BOARD BEEP ]*******************************
/*
void Beep(U32 freq, U32 ms)
{
rGPBCON &= ~3; //set GPB0 as tout0, pwm output
rGPBCON |= 2;
rTCFG0 &= ~0xff;
rTCFG0 |= 15; //prescaler = 15+1
rTCFG1 &= ~0xf;
rTCFG1 |= 2; //mux = 1/8
rTCNTB0 = (PCLK>>7)/freq;
rTCMPB0 = rTCNTB0>>1; // 50%
rTCON &= ~0x1f;
rTCON |= 0xb; //disable deadzone, auto-reload, inv-off, update TCNTB0&TCMPB0, start timer 0
rTCON &= ~2; //clear manual update bit
Delay(ms);
rGPBCON &= ~3; //set GPB0 as output
rGPBCON |= 1;
rGPBDAT &= ~1;
}*/
void Buzzer_Freq_Set( U32 freq )
{
rGPBCON &= ~3; //set GPB0 as tout0, pwm output
rGPBCON |= 2;
rTCFG0 &= ~0xff;
rTCFG0 |= 15; //prescaler = 15+1
rTCFG1 &= ~0xf;
rTCFG1 |= 2; //mux = 1/8
rTCNTB0 = (PCLK>>7)/freq;
rTCMPB0 = rTCNTB0>>1; // 50%
rTCON &= ~0x1f;
rTCON |= 0xb; //disable deadzone, auto-reload, inv-off, update TCNTB0&TCMPB0, start timer 0
rTCON &= ~2; //clear manual update bit
}
void Buzzer_Stop( void )
{
rGPBCON &= ~3; //set GPB0 as output
rGPBCON |= 1;
rGPBDAT &= ~1;
}
//***************************[ BOARD BEEP ]*******************************
void Beep(U32 freq, U32 ms)
{
Buzzer_Freq_Set( freq ) ;
Delay( ms ) ;
Buzzer_Stop() ;
}
/****************************************************************************
【功能说明】蜂鸣器PWM测试
****************************************************************************/
void BUZZER_PWM_Test( void )
{
U16 freq = 1000 ;
Uart_Printf( "\nBUZZER TEST ( PWM Control )\n" );
Uart_Printf( "Press +/- to increase/reduce the frequency of BUZZER !\n" ) ;
Uart_Printf( "Press 'ESC' key to Exit this program !\n\n" );
Buzzer_Freq_Set( freq ) ;
while( 1 )
{
U8 key = Uart_Getch();
if( key == '+' )
{
if( freq < 20000 )
freq += 10 ;
Buzzer_Freq_Set( freq ) ;
}
if( key == '-' )
{
if( freq > 11 )
freq -= 10 ;
Buzzer_Freq_Set( freq ) ;
}
Uart_Printf( "\tFreq = %d\n", freq ) ;
if( key == ESC_KEY )
{
Buzzer_Stop() ;
return ;
}
}
}
//********************** BOARD LCD backlight ]****************************
void LcdBkLtSet(U32 HiRatio)
{
#define FREQ_PWM1 1000
if(!HiRatio)
{
rGPBCON = rGPBCON & (~(3<<2)) | (1<<2) ; //GPB1设置为output
rGPBDAT &= ~(1<<1);
return;
}
rGPBCON = rGPBCON & (~(3<<2)) | (2<<2) ; //GPB1设置为TOUT1
if( HiRatio > 100 )
HiRatio = 100 ;
rTCON = rTCON & (~(0xf<<8)) ; // clear manual update bit, stop Timer1
rTCFG0 &= 0xffffff00; // set Timer 0&1 prescaler 0
rTCFG0 |= 15; //prescaler = 15+1
rTCFG1 &= 0xffffff0f; // set Timer 1 MUX 1/16
rTCFG1 |= 0x00000030; // set Timer 1 MUX 1/16
rTCNTB1 = ( 100000000>>8 )/FREQ_PWM1; //if set inverter off, when TCNT2<=TCMP2, TOUT is high, TCNT2>TCMP2, TOUT is low
rTCMPB1 = ( rTCNTB1*(100-HiRatio))/100 ; //if set inverter on, when TCNT2<=TCMP2, TOUT is low, TCNT2>TCMP2, TOUT is high
rTCON = rTCON & (~(0xf<<8)) | (0x0e<<8) ;
//自动重装,输出取反关闭,更新TCNTBn、TCMPBn,死区控制器关闭
rTCON = rTCON & (~(0xf<<8)) | (0x0d<<8) ; //开启背光控制
}
/****************************************************************************
【功能说明】LCD背光亮度控制，PWM控制占空比
****************************************************************************/
void LCD_BackLight_Control( void )
{
U8 HiRatio = 50 ;
Uart_Printf( "\nNOTE : ONLY SOME type LCD kit SUPPORT backlight adjust!!!\n" ) ;
Uart_Printf( "Press +/- to increase/reduce the light of LCD !\n" ) ;
Uart_Printf( "Press 'ESC' to Exit this test program !\n\n" );
LcdBkLtSet( HiRatio ) ;
while( 1 )
{
U8 key = Uart_Getch();
if( key == '+' )
{
if( HiRatio < 100 )
HiRatio += 1 ;
}
if( key == '-' )
{
if( HiRatio > 1 )
HiRatio -= 1 ;
}
if( key == ESC_KEY ) break ;
LcdBkLtSet( HiRatio ) ;
Uart_Printf( "LCD backlight HiRatio %d\n", HiRatio ) ;
}
}
//*************************[ Timer ]********************************
void Timer_Start(int divider) //0:16us,1:32us 2:64us 3:128us
{
rWTCON = ((PCLK/1000000-1)<<8)|(divider<<3); //Watch-dog timer control register
rWTDAT = 0xffff; //Watch-dog timer data register
rWTCNT = 0xffff; //Watch-dog count register
// Watch-dog timer enable & interrupt disable
rWTCON = (rWTCON & ~(1<<5) & ~(1<<2)) |(1<<5);
}
//=================================================================
int Timer_Stop(void)
{
rWTCON = ((PCLK/1000000-1)<<8);
return (0xffff - rWTCNT);
}
//*************************[ MPLL ]*******************************
void ChangeMPllValue(int mdiv,int pdiv,int sdiv)
{
rMPLLCON = (mdiv<<12) | (pdiv<<4) | sdiv;
}
//************************[ HCLK, PCLK ]***************************
/*
// for 2410.
void ChangeClockDivider(int hdivn,int pdivn)
{
// hdivn,pdivn FCLK:HCLK:PCLK
// 0,0 1:1:1
// 0,1 1:1:2
// 1,0 1:2:2
// 1,1 1:2:4
rCLKDIVN = (hdivn<<1) | pdivn;
if(hdivn)
MMU_SetAsyncBusMode();
else
MMU_SetFastBusMode();
}
*/
// Modified for 2440.
void ChangeClockDivider(int hdivn_val,int pdivn_val)
{
int hdivn=2, pdivn=0;
// hdivn_val (FCLK:HCLK)ratio hdivn
// 11 1:1 (0)
// 12 1:2 (1)
// 13 1:3 (3)
// 14 1:4 (2)
// pdivn_val (HCLK:PCLK)ratio pdivn
// 11 1:1 (0)
// 12 1:2 (1)
switch(hdivn_val) {
case 11: hdivn=0; break;
case 12: hdivn=1; break;
case 13:
case 16: hdivn=3; break;
case 14:
case 18: hdivn=2; break;
}
switch(pdivn_val) {
case 11: pdivn=0; break;
case 12: pdivn=1; break;
}
//Uart_Printf("Clock division change [hdiv:%x, pdiv:%x]\n", hdivn, pdivn);
rCLKDIVN = (hdivn<<1) | pdivn;
switch(hdivn_val) {
case 16: // when 1, HCLK=FCLK/8.
rCAMDIVN = (rCAMDIVN & ~(3<<8)) | (1<<8);
break;
case 18: // when 1, HCLK=FCLK/6.
rCAMDIVN = (rCAMDIVN & ~(3<<8)) | (1<<9);
break;
}
if(hdivn!=0)
MMU_SetAsyncBusMode();
else
MMU_SetFastBusMode();
}
//**************************[ UPLL ]*******************************
void ChangeUPllValue(int mdiv,int pdiv,int sdiv)
{
rUPLLCON = (mdiv<<12) | (pdiv<<4) | sdiv;
}
//*************************[ General Library ]**********************
void * malloc(unsigned nbyte)
//Very simple; Use malloc() & free() like Stack
//void *mallocPt=Image$RW$Limit;
{
void *returnPt = mallocPt;
mallocPt = (int *)mallocPt+nbyte/4+((nbyte%4)>0); //To align 4byte
if( (int)mallocPt > HEAPEND )
{
mallocPt = returnPt;
return NULL;
}
return returnPt;
}
//-------------------------------------------------------------------
void free(void *pt)
{
mallocPt = pt;
}

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ARM 2440裸奔实现电子时钟

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