PLL.zip_LPC2378 PLL

/****************************************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 ** ********************************************************************************************************/ #define IN_TARGET #include "config.h" /********************************************************************************************************* ** 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 这一句替换为自己的代码 } /********************************************************************************************************* ** 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) { /* 添加自己的代码 */ /* Add your codes here */ } /********************************************************************************************************* ** 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: LinEnqiang ** Modified date: 2007/05/26 **------------------------------------------------------------------------------------------------------ ********************************************************************************************************/ void TargetResetInit(void) { #ifdef __DEBUG_RAM MEMMAP = 0x2; // remap #endif #ifdef __DEBUG_FLASH MEMMAP = 0x1; // remap #endif #ifdef __IN_CHIP MEMMAP = 0x1; // remap #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 main OSC,,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 = 288 MHz/6 = 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 =l