PWM.rar_ARM PWM_arm c语言_pwm a_pwm arm

/****************************************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: 2008/02/25 ** Version: 1.02 ** Descriptions: Added for LPC2470/70 ** ********************************************************************************************************/ #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: Zhangmingjie ** Modified date: 2008/02/23 **------------------------------------------------------------------------------------------------------ ********************************************************************************************************/ void TargetResetInit(void) { #ifdef __DEBUG_RAM MEMMAP = 0x02; /* remap */ #endif #ifdef __DEBUG_FLASH MEMMAP = 0x01; /* remap */ #endif #ifdef __IN_CHIP MEMMAP = 0x01; /* remap */ #endif #ifdef __OUT_CHIP /* * Edit for LPC2460/70 * LPC2460/70必须使用外部NorFlash启动方式 * 此处将中断向量表的64个字节复制到内部0x4000000开始处 * 同样在分散加载文件出也要做相应修改 */ unsigned int i; uint32 *piCp1, *piCp2; extern void Reset(void); piCp1 = (uint32 *)Reset; piCp2 = (uint32 *)0x40000000; for (i = 0; i < 16; i++) { *piCp2++ = *piCp1++; } /* * Edit for LPC2460/70 */ MEMMAP = 0x02; /* remap */ PINSEL6 = 0x55555555; PINSEL8 = 0x55555554; PINSEL9 = 0x40050155; /* CS1 */ EMCControl = 0x01; /* 不进行CS1映射 */ EMCStaticConfig1 = 0x00000101; /* 使用默认延时 */ #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 ***********************************************************