📄 target.c
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/****************************************Copyright (c)**************************************************
** File name: target.c
** Descriptions: header file of the specific codes for LPC2200 target boards
** Every project should include a copy of this file, user may modify it as needed
** Modified by:
** Modified date:
** Version:
** Descriptions:
**
********************************************************************************************************/
//#define IN_TARGET
#include "config.h"
typedef void (*PFNCT)(void);//PFNCT为指向函数的指针类型，该函数返回值是一个地址
void FIQ_Exception(void);
//*****************************
void __irq IRQ_Exception(void){
while(1); // change it to your code 这一句替换为自己的代码
}
/*
*********************************************************************************************************
* IRQ ISR HANDLER
*
* Description : This function is called by OS_CPU_IRQ_ISR() to determine the source of the interrupt
* and process it accordingly.
*
* Arguments : none
*********************************************************************************************************
*/
void OS_CPU_IRQ_ISR_Handler (void)
{
PFNCT pfnct;
pfnct = (PFNCT)VICVectAddr; /* Read the interrupt vector from the VIC */
while (pfnct != (PFNCT)0) { /* Make sure we don't have a NULL pointer */
(*pfnct)(); /* Execute the ISR for the interrupting device */
pfnct = (PFNCT)VICVectAddr; /* Read the interrupt vector from the VIC */
}
}
/**********************************************************************************************************
* FIQ ISR HANDLER
*
* Description : This function is called by OS_CPU_FIQ_ISR() to determine the source of the interrupt
* and process it accordingly.
*
* Arguments : none
*********************************************************************************************************/
void OS_CPU_FIQ_ISR_Handler (void)
{
FIQ_Exception();
}
/*********************************************************************************************************
** 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
*******************************************************************************************************/
void FIQ_Exception(void){
while(1);
//extern void Eint3Exception(void); // change it to your code 这一句替换为自己的代码
//Eint3Exception();
}
/*********************************************************************************************************
** Function name: Timer0_Exception
**
** Descriptions: Timer0 interrupt service function
**
** input parameters: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
*******************************************************************************************************/
void Timer0_Handler(void){
T0IR = 0x01;
OSTimeTick();
VICVectAddr = 0; //interrupt close 通知中断控制器中断结束
}
/*********************************************************************************************************
** Function name: Timer0Init
**
** Descriptions: Initialize the Time0
**
** input parameters: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
********************************************************************************************************/
void Timer0Init(void){
T0IR = 0xffffffff;
T0TC = 0;
T0TCR = 0x01;
T0MCR = 0x03;
T0MR0 = (Fpclk / OS_TICKS_PER_SEC);
}
/*********************************************************************************************************
** Function name: VICInit
**
** Descriptions: Initialize the Interrupt Vevtor Controller
**
** input parameters: None
** Returned value: None
**
** Used global variables: None
** Calling modules: None
********************************************************************************************************/
void VICInit(void){
//extern void Eint2Exception(void);
//extern void Eint3Exception(void);
VICIntEnClr = 0xffffffff;
VICVectAddr0 = (uint32)Timer0_Handler;
VICVectCntl0 = (0x20 | 0x04);
VICIntEnable = 1 << 4;
/****
VICVectAddr2 = (uint32)Eint3Exception;
VICVectCntl2 = (0x20 | 0x11);
VICIntEnable = 1<<17;
VICVectAddr1 = (uint32)Eint2Exception;
VICVectCntl1 = (0x20 | 0x10);
VICIntEnable = 1<<16;
VICVectAddr3 = (uint32)I2c_Exception;
VICVectCntl3 = (0x20 | 0x09);
VICIntEnable = 1<<9;
***/
// VICVectAddr4 = (uint32)UART1_Exception;
// VICVectCntl4 = (0x20 | 0x07);
// VICIntEnable = 1 << 7;
}
/*********************************************************************************************************
** 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){
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
OS_ENTER_CRITICAL();
srand((uint32) TargetInit);
VICInit();
Timer0Init();
//I2cInit(400000);
OS_EXIT_CRITICAL();
}
/*********************************************************************************************************
** Function name: InitialiseUART0
**
** Descriptions: Initialize the Uart0
**
** 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 InitialiseUART0(uint32 bps){
uint16 Fdiv;
PINSEL0 = (PINSEL0 & 0xfffffff0) | 0x05; /* Select the pins for Uart 选择管脚为UART0 */
U0LCR = 0x80; /* Enable to access the frequenc regecter 允许访问分频因子寄存器 */
Fdiv = (Fpclk / 16) / bps; /* Set the baudrate设置波特率 */
U0DLM = Fdiv / 256;
U0DLL = Fdiv % 256;
U0LCR = 0x03; /* Disable to access the frequenc regecter 禁止访问分频因子寄存器 */
/* set to 8,1,n 且设置为8,1,n */
U0IER = 0x00; /* Disable interrupt禁止中断 */
U0FCR = 0x00; /* initial FIFO 初始化FIFO */
}
/*********************************************************************************************************
** 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:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void TargetResetInit(void){
//****************************
#ifdef __DEBUG
MEMMAP = 0x2;
#endif
#ifdef __RELEASE
MEMMAP = 01;
#endif
//*******************************/
PINSEL0 = (PINSEL0 & 0xFFFF0000) | 0x05 | 0x50;
/* 设置系统各部分时钟 */
/* Set system timers for each component */
PLLCON = 1;
#if (Fpclk / (Fcclk / 4)) == 1
VPBDIV = 0;
#endif
#if (Fpclk / (Fcclk / 4)) == 2
VPBDIV = 2;
#endif
#if (Fpclk / (Fcclk / 4)) == 4
VPBDIV = 1;
#endif
#if (Fcco / Fcclk) == 2
PLLCFG = ((Fcclk / Fosc) - 1) | (0 << 5);
#endif
#if (Fcco / Fcclk) == 4
PLLCFG = ((Fcclk / Fosc) - 1) | (1 << 5);
#endif
#if (Fcco / Fcclk) == 8
PLLCFG = ((Fcclk / Fosc) - 1) | (2 << 5);
#endif
#if (Fcco / Fcclk) == 16
PLLCFG = ((Fcclk / Fosc) - 1) | (3 << 5);
#endif
PLLFEED = 0xaa;
PLLFEED = 0x55;
while((PLLSTAT & (1 << 10)) == 0);
PLLCON = 3;
PLLFEED = 0xaa;
PLLFEED = 0x55;
/* 设置存储器加速模块 */
/* Set memory accelerater module*/
MAMCR = 0;
#if Fcclk < 20000000
MAMTIM = 1;
#else
#if Fcclk < 40000000
MAMTIM = 2;
#else
#if Fcclk < 60000000
MAMTIM = 3;
#else
#if Fcclk < 80000000
MAMTIM = 4;
#else
#if Fcclk < 100000000
MAMTIM = 5;
#else
#if Fcclk < 120000000
MAMTIM = 6;
#else
MAMTIM = 7;
#endif
#endif
#endif
#endif
#endif
#endif
MAMCR = 2;
/* 设置串行口 */
/* initialize UART*/
//InitialiseUART0(115200);
/* 设置实时时钟 */
/* initialize RTC*/
/*******
CCR = 1;
PREINT = Fpclk / 32768 - 1;
PREFRAC = Fpclk - (Fpclk / 32768) * 32768;
YEAR = 2003;
MONTH = 6;
DOM = 2;
*******/
/* initialize VIC*/
VICIntEnClr = 0xffffffff;
VICVectAddr = 0;
VICIntSelect = 0;
//T0IR = 0xffffffff;
//T0TCR = 0X02;
}
/*********************************************************************************************************
** 以下为一些与系统相关的库函数的实现
** 具体作用请ads的参考编译器与库函数手册
** 用户可以根据自己的要求修改
********************************************************************************************************/
/*********************************************************************************************************
** 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)
{
returncode = returncode;
}
char *_sys_command_string(char * cmd, int len)
{
cmd = cmd;
len = len;
return 0;
}
/*********************************************************************************************************
** End Of File
********************************************************************************************************/
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