CAN总线驱动程序 包括SPI控制,MCP2515通信芯片控制

/****************************************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: daimaobo ** Modified date: 2006-12-20 ** Version: 2.00 ** Descriptions: Modified for LPC23XX ** ********************************************************************************************************/ #define IN_TARGET #include "config.h" /********************************************************************************************************* ** Function name: IRQ_Exception ** ** Descriptions: 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 __irq IRQ_Exception(void) { while(1); // change it to your code 这一句替换为自己的代码 } /********************************************************************************************************* ** 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 board before running the main() function; User may ** change it as needed, but may not deleted it. ** ** input parameters: None ** Returned value: None ** ** Used global variables: None ** Calling modules: None ** ** Created by: Chenmingji ** Created Date: 2004/02/02 **------------------------------------------------------------------------------------------------------- ** Modified by: zhangrijin ** Modified date: 2007/1/18 ** Descriptions: Modified for LPC23XX **------------------------------------------------------------------------------------------------------ ********************************************************************************************************/ void TargetResetInit(void) { #ifdef __DEBUG_RAM MEMMAP = 0x2; // remap #endif #ifdef __DEBUG_FLASH MEMMAP = 0x1; // remap #endif #ifdef __IN_CHIP MEMMAP = 0x1; // remap #endif SCS = (SCS & 0x04)|0x20; // Enable the main OSC,,1MHz～20MHz while((SCS & 0x40) == 0 ); // Wait until main OSC is usable if ( PLLSTAT & (1 << 25) ) // if the PLL was connected { PLLCON = 0x01; PLLFEED = 0xAA; // disconnect the PLL PLLFEED = 0x55; PLLCON = 0x00; PLLFEED = 0xAA; // disable the PLL PLLFEED = 0x55; } else if ( PLLSTAT & (1 << 24) ) // if the PLL was enabled // 如果PLL已被使能,则先禁止PLL { PLLCON = 0x00; PLLFEED = 0xAA; // disable the PLL PLLFEED = 0x55; } CLKSRCSEL = 0x01; // select main OSC as the PLL clock source PLLCON = 1; // Enable but disconnect the PLL PLLCFG = (((PLL_NValue-1) << 16)|(PLL_MValue-1) ); // set the PLLCFG PLLFEED = 0xAA; // Enable PLL PLLFEED = 0x55; while (((PLLSTAT & (1 << 26)) == 0)); // Wait until the PLL is usable CCLKCFG = (Fcco/Fcclk - 1); // set the CCLKCFG PLLCON = 3; // connect the PLL PLLFEED = 0xAA; PLLFEED = 0x55; while (((PLLSTAT & (3 << 25))!= (3 << 25))); // Wait until the PLL is connected and locked #if USE_USB PCONP |= 0x80000000; // Turn On the USB PCLK USBCLKCFG = (Fcco/Fusbclk - 1); #endif // 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 =