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使用CCS编译，怎样在主程序为C语言中调用汇编子程序

ds w
Prodigy 60 points


#include <stdio.h>

#if defined(rvmdk) || defined(__ARMCC_VERSION)
__asm void
SysCtlDelay(uint32_t ui32Count)
{
subs r0, #1;
bne SysCtlDelay;
bx lr;
}
#endif
int main(void)
{
printf("Hello World!\n");
//SysCtlDelay();//**************这里怎样处里呢？
return 0;
}

上边的程序在CCS中编译通过的，但是我怎样调用子程序，按照以前的方式编译报错，请各位大哥指导！谢谢！

  • 0
    Guru 65885 points 
    //*****************************************************************************
//
// rgb.c - Evaluation board driver for RGB LED.
//
// Copyright (c) 2012-2014 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
// 
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
// 
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
// 
// This is part of revision 2.1.0.12573 of the EK-TM4C123GXL Firmware Package.
//
//*****************************************************************************

#include <stdint.h>
#include <stdbool.h>
#include "driverlib/sysctl.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/debug.h"
#include "driverlib/fpu.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/rom.h"
#include "driverlib/uart.h"
#include "utils/uartstdio.h"
#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_ints.h"
#include "inc/hw_nvic.h"
#include "inc/hw_sysctl.h"
#include "inc/hw_types.h"
#include "inc/hw_flash.h"
#include "driverlib/cpu.h"
#include "driverlib/debug.h"
#include "driverlib/interrupt.h"
#include "driverlib/sysctl.h"


__asm void
SysCtlcall(uint32_t ui32Count)
{
    subs    r0, #1;
    bne     SysCtlcall;
    bx      lr;
}


int main(void)
{

    SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
                       SYSCTL_OSC_MAIN);

    SysCtlcall(8000);
}

    这个代码在MDK中是可以编译通过的。在CCS中估计还需要定义什么东西吧。你可以试试在sysctl.c"中慢慢修改。在CCS中的汇编还需要符合CCS汇编的规范