?? target.c
字號:
/****************************************Copyright (c)**************************************************
** Guangzou ZLG-MCU Development Co.,LTD.
** graduate school
** http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name: target.c
** Last modified Date: 2004-09-17
** Last Version: 1.0
** Descriptions: header file of the specific codes for LPC2100 target boards
** Every project should include a copy of this file, user may modify it as needed
**------------------------------------------------------------------------------------------------------
** Created by: Chenmingji
** Created date: 2004-02-02
** Version: 1.0
** Descriptions: The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by: Chenmingji
** Modified date: 2004-09-17
** Version: 1.01
** Descriptions: Renewed the template, added more compiler supports
**
**------------------------------------------------------------------------------------------------------
** Modified by: LinEnqiang
** Modified date: 2007/05/26
** Version: 1.02
** Descriptions: Modified for NXP23XX
**
** Modified by: Zhangmingjie
** Modified date: 2008/04/18
********************************************************************************************************/
#define IN_TARGET
#include "config.h"
extern void Reset(void);
/*********************************************************************************************************
** Function name: FIQ_Exception
**
** Descriptions: Fast interrupt exceptional handler , change it as needed
**
** input parameters: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
**
** Created by: Chenmingji
** Created Date: 2004/02/02
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void FIQ_Exception(void)
{
// while(1); // change it to your code 這一句替換為自己的代碼
}
/*********************************************************************************************************
** Function name: TargetInit
**
** Descriptions: Initialize the target board; it is called in a necessary place, change it as
** needed
**
** input parameters: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
**
** Created by: Chenmingji
** Created Date: 2004/02/02
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void TargetInit(void)
{
/* 添加自己的代碼 */
/* Add your codes here */
}
/*********************************************************************************************************
* Function name ： DelayNS
* Descriptions ： 長軟件延時
* input parameters ： idly 延時參數，值越大，延時越久
* output parameters ：無
* Returned value ： 無
*********************************************************************************************************/
void SDRAMDelayNS(uint32 idly)
{
uint32 i;
for(; idly>0; idly--){
for(i=0; i<5000; i++);
}
}
/*********************************************************************************************************
**Function name ： SDRAMInit
**Descriptions ： 初始化SDRAM
**input parameters ： 無
**output parameters ：無
**
** Created by: zhangzheng
** Created Date: 2007.12.10
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void SDRAMInit( void )
{
uint32 i, dummy ;
PINSEL4 = 0x50000000;
PINSEL5 = 0x05050555;
PINSEL6 |= 0x55555555;
PINSEL8 |= 0x55555555;
PINSEL9 |= 0x50555555;
EMCControl= 0x00000001; /*Disable Address mirror*/
EMCDynamictRP = 1;
EMCDynamictRAS = 3;
EMCDynamictSREX = 1;
EMCDynamictAPR = 1;
EMCDynamictDAL = 5;
EMCDynamictWR = 2;
EMCDynamictRC = 3;
EMCDynamictRFC = 3;
EMCDynamictXSR = 5;
EMCDynamictRRD = 1;
EMCDynamictMRD = 2;
EMCDynamicReadConfig =1; /* Command delayed strategy */
/* Default setting, RAS latency 3 CCLKs, CAS latenty 3 CCLKs. */
EMCDynamicRASCAS0 = 0x00000303;
/* 256MB, 16Mx16, 4 banks, row=13, column=9 */
EMCDynamicConfig0 = 0x00000680;
#ifdef __OUT_CHIP
SDRAMDelayNS(4);
#else
SDRAMDelayNS(200);
#endif
/* Mem clock enable, CLKOUT runs, send command: NOP */
EMCDynamicControl = 0x00000183;
#ifdef __OUT_CHIP
SDRAMDelayNS(2);
#else
SDRAMDelayNS(100);
#endif
/* Send command: PRECHARGE-ALL, shortest possible refresh period */
EMCDynamicControl = 0x00000103;
#ifdef __OUT_CHIP
SDRAMDelayNS(2);
#else
SDRAMDelayNS(100);
#endif
/* set 32 CCLKs between SDRAM refresh cycles */
EMCDynamicRefresh = 0x00000002;
for(i = 0; i < 0x80; i++); /* wait 128 AHB clock cycles */
/* set 28 x 16CCLKs=448CCLK=7us between SDRAM refresh cycles */
EMCDynamicRefresh = 28;
/* To set mode register in SDRAM, enter mode by issue
MODE command, after finishing, bailout and back to NORMAL mode. */
/* Mem clock enable, CLKOUT runs, send command: MODE */
EMCDynamicControl = 0x00000083;
dummy=*((volatile uint32 *)(0xa0033000));
EMCDynamicControl = 0x00000000; /* Send command: NORMAL */
EMCDynamicConfig0 |= 0x00080000; /* Enable buffer */
SDRAMDelayNS(10);
}
/*********************************************************************************************************
** Function name: TargetResetInit
**
** Descriptions: Initialize the target
**
** input parameters: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
**
** Created by: Chenmingji
** Created Date: 2004/02/02
**-------------------------------------------------------------------------------------------------------
** Modified by: Zhangmingjie
** Modified date: 2008/02/23
** Modified by: Zhangmingjie
** Modified date: 2008/04/18
**------------------------------------------------------------------------------------------------------
** Modified by: Zhanghuping
** Modified date: 2008/04/25
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void TargetResetInit(void)
{
#ifdef __DEBUG_RAM
SDRAMInit(); /* 配置外部SDRAM */
MEMMAP = 0x02;
/* remap 從內部SRAM */
#endif
#ifdef __DEBUG_SDRAM
uint8 i;
uint32 *cp1,*cp2;
cp1=(uint32*)Reset;
cp2=(uint32*)0x40000000;
for(i=0;i<16;i++)
{
*cp2++ = *cp1++;
}
MEMMAP = 0x2; /* remap 從內部SRAM映射 */
#endif
#ifdef __DEBUG_FLASH
SDRAMInit(); /* 配置外部SDRAM */
MEMMAP = 0x01; /* remap 從片內Flash */
#endif
#ifdef __IN_CHIP
SDRAMInit(); /* 配置外部SDRAM */
MEMMAP = 0x01; /* remap 從片內Flash */
#endif
#ifdef __OUT_CHIP
/*
* Edit for LPC2460/70
* 將中斷向量表復制到片內
* 的SRAM的前64個字節
*/
unsigned int i;
uint32 *cp1, *cp2;
extern void Reset(void);
cp1 = (uint32 *)Reset;
cp2 = (uint32 *)0x40000000;
for (i = 0; i < 16; i++)
{
*cp2++ = *cp1++;
}
MEMMAP = 0x02; /* remap 到內部RAM */
/*
* Edit for LPC2460/70
* 配置外部總線訪問SST36VF1601C
* 的速度，其中，將讀取速度
* 配置為最快，寫速度配置為最快
*/
PINSEL6 = 0x55555555; /* 配置外部總線D0~D15 */
PINSEL8 = 0x55555554; /* 配置外部總線A1~A15 */
PINSEL9 = 0x40050155; /* 配置外部總線A16~A20,OE,WE,CS1*/
EMCControl = 0x01; /* 使能外部EMC，禁止鏡像 */
EMCStaticConfig1 = 0x00000081; /* 配置外部總線，16bit寬度 */
EMCStaticWaitRd1 = 4; /* 配置外部總線，讀延時3cclk */
EMCStaticWaitOen1 = 0x01; /* 輸出使能延時1cclk */
EMCStaticWaitWen1 = 0x00; /* 寫使能延時1cclk */
EMCStaticWaitWr1 = 0x02; /* 寫延時4cclk */
SDRAMInit(); /* 配置外部SDRAM */
#endif
if ( PLLSTAT & (1 << 25) )
{
PLLCON = 1; /* Enable PLL, disconnected */
PLLFEED = 0xAA;
PLLFEED = 0x55;
}
PLLCON = 0; /* Disable PLL, disconnected */
PLLFEED = 0xAA;
PLLFEED = 0x55;
while(PLLSTAT & (3 << 24));
SCS = (SCS & 0x04)|0x20; /* Enable the mainOSC,1MHz~20MHz*/
while((SCS & 0x40) == 0 ); /* Wait until main OSC is usable*/
CLKSRCSEL = 0x01; /* select main OSC as the PLL */
/* clock source */
PLLCFG = (((PLL_NValue) << 16)|(PLL_MValue));
PLLCON = 1;
PLLFEED = 0xAA; /* Enable but disconnect the PLL*/
PLLFEED = 0x55;
while (((PLLSTAT & (1 << 24)) == 0)); /* Wait until the PLL is usable */
CCLKCFG = CCLKDivValue;
#if USE_USB
USBCLKCFG = USBCLKDivValue; /* usbclk = 480 MHz/10 = 48 MHz */
PCONP |= 0x80000000; /* Turn On USB PCLK */
#else
USBCLKCFG = USBCLKDivValue;
PCONP &= 0x7FFFFFFF;
#endif
while ( ((PLLSTAT & (1 << 26)) == 0) ); /* Check lock bit status */
while (((PLLSTAT & 0x00007FFF) != PLL_MValue) && (((PLLSTAT & 0x00FF0000) >> 16) != PLL_NValue));
PLLCON = 3; /* connect the PLL */
PLLFEED = 0xAA;
PLLFEED = 0x55;
while (((PLLSTAT & (1 << 25))!= (1 << 25))); /* Wait until the PLL is */
/* connected and locked */
/*
* Set system timers for each component
*/
#if (Fpclk / (Fcclk / 4)) == 1
PCLKSEL0 = 0x00000000; /* PCLK is 1/4 CCLK */
PCLKSEL1 = 0x00000000;
#else
#if (Fpclk / (Fcclk / 4)) == 2
PCLKSEL0 = 0xAAAAAAAA; /* PCLK is 1/2 CCLK */
PCLKSEL1 = 0xAAAAAAAA;
#else
PCLKSEL0 = 0x55555555; /* PCLK is the same as CCLK */
PCLKSEL1 = 0x55555555;
#endif
#endif
/*
* Set memory accelerater module
*/
MAMCR = 0;
#if Fcclk < 20000000
MAMTIM = 1;
#else
#if Fcclk < 40000000
MAMTIM = 2;
#else
MAMTIM = 3;
#endif
#endif
MAMCR = 2;
/*
* Add your codes here
*/
return;
}
/*********************************************************************************************************
** 以下為一些與系統相關的庫函數的實現
** 具體作用請ads的參考編譯器與庫函數手冊
** 用戶可以根據自己的要求修改
********************************************************************************************************/
/*********************************************************************************************************
** The implementations for some library functions
** For more details, please refer to the ADS compiler handbook and The library
** function manual
** User could change it as needed
********************************************************************************************************/
#include "rt_sys.h"
#include "stdio.h"
#pragma import(__use_no_semihosting_swi)
#pragma import(__use_two_region_memory)
int __rt_div0(int a)
{
a = a;
return 0;
}
int fputc(int ch,FILE *f)
{
ch = ch;
f = f;
return 0;
}
int fgetc(FILE *f)
{
f = f;
return 0;
}
int _sys_close(FILEHANDLE fh)
{
fh = fh;
return 0;
}
int _sys_write(FILEHANDLE fh, const unsigned char * buf,
unsigned len, int mode)
{
fh = fh;
buf = buf;
len =len;
mode = mode;
return 0;
}
int _sys_read(FILEHANDLE fh, unsigned char * buf,
unsigned len, int mode)
{
fh = fh;
buf = buf;
len =len;
mode = mode;
return 0;
}
void _ttywrch(int ch)
{
ch = ch;
}
int _sys_istty(FILEHANDLE fh)
{
fh = fh;
return 0;
}
int _sys_seek(FILEHANDLE fh, long pos)
{
fh = fh;
return 0;
}
int _sys_ensure(FILEHANDLE fh)
{
fh = fh;
return 0;
}
long _sys_flen(FILEHANDLE fh)
{
fh = fh;
return 0;
}
int _sys_tmpnam(char * name, int sig, unsigned maxlen)
{
name = name;
sig = sig;
maxlen = maxlen;
return 0;
}
void _sys_exit(int returncode)
{
while(1);
}
char *_sys_command_string(char * cmd, int len)
{
cmd = cmd;
len = len;
return 0;
}
/*********************************************************************************************************
** End Of File
********************************************************************************************************/
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -