信捷plc编程用c语言 (信捷plcc语言视频教程)

信捷PLC编程软件XDPPro，里面有arm-none-eabi的gcc程序，测试所用型号的SOC为ST的Cortex-M7。用C语言编程的自由度很高，如果有能力接管编译过程，各种高级数据结构更是锦上添花。

初步测试了GCC的调用过程，从抓取到的一些信息看，用户手册中未详述的魔术操作，在源码中反而直白明了。

如果利用C语言开发出实用的数据结构和算法，这种小型PLC的应用场景还是很多的，毕竟有1MB的程序空间，要填满真不容易。附上gcc调用参数和文件核心内容：源码 -> *.c -> *.i

//XDPPro v3.7.4b, PLC XL5E-16

//调用记录arm-none-eabi-**ex.e**
2026-03-14T18:26:37+00:00.655  
C:\XDPPro\TOOL\XD\bin\arm-none-eabi-gcc*ex.e** 
-save-temps //保留临时文件，在*-gcc*ex.e**同层文件夹中：FUNC1.i  FUNC1.s
..\..\..\tmp\PrjFuncB\FUNC1.c 
-mthumb 
-mcpu=cortex-m7 
-mfloat-abi=hard 
-mfpu=fpv5-sp-d16 
-nostartfiles 
-o ..\..\..\tmp\PrjFuncB\FUNC1.o 
-I ..\inc 
-c 
-fsigned-char 
-g 
-ffunction-sections 
-mlittle-endian

2026-03-14T18:26:37+00:00.871  
C:\XDPPro\TOOL\XD\bin\arm-none-eabi-ld*ex.e**  
-T ..\..\..\tmp\PrjFuncB\stm32_flash.ld 
-Map=..\..\..\tmp\PrjFuncB\xd.map 
-s 
-o ..\..\..\tmp\PrjFuncB\xd.out 
..\..\..\tmp\PrjFuncB\Ladder1.o 
..\..\..\tmp\PrjFuncB\FUNC1.o
..\..\..\tmp\PrjFuncB\sysRegAddr.o 
..\..\..\tmp\PrjFuncB\sysFuncAddr.o 
-L ..\lib\M7 
-lm 
-lgcc 
-lc

2026-03-14T18:26:37+00:00.257  
C:\XDPPro\TOOL\XD\bin\arm-none-eabi-objdump*ex.e**  
-s 
-D 
-marm ..\..\..\tmp\PrjFuncB\xd.out

2026-03-14T18:26:37+00:00.555  
C:\XDPPro\TOOL\XD\bin\arm-none-eabi-ld*ex.e**  
-T ..\..\..\tmp\PrjFuncB\stm32_flash.ld 
-Map=..\..\..\tmp\PrjFuncB\xd.map 
-s 
-o ..\..\..\tmp\PrjFuncB\xd.out 
..\..\..\tmp\PrjFuncB\TGLadder1.o 
-L ..\lib\M7 
-lm 
-lgcc 
-lc

2026-03-14T18:26:37+00:00.930  
C:\XDPPro\TOOL\XD\bin\arm-none-eabi-objdump*ex.e**  
-s 
-D 
-marm ..\..\..\tmp\PrjFuncB\xd.out
//end_//调用记录

//file:源文件_FUNC1
/*************************************************************************
   FunctionBlockName:  FUNC1
   Version:            1.0.0
   Author:             thj
   UpdateTime:         2026-03-14T18:26:37+00:00
   Comment:
			abcd
			12345678
**************************************************************************/

#define thj_FUNC1

void FUNC1(WORD W, BIT B)
{
#define SysRegAddr_HD_D_HM_M
	unsigned long* p0 = (unsigned long*)&D[0];
	(*p0)++;

#define pD4_Float   (( float * ) &D[4])
	* pD4_Float = 1.2345;
	//* ( ( float * ) &D[4] ) = 1.2345;
	strcpy((char*)&D[20], "a一二b1234"); //GB18030
	*((wchar_t*)&D[30]) = L'\x1234';
	*((double*)&D[40]) = sqrt(2);
	*((double*)&D[50]) = 1122334455.0;
}
//end_源文件

//file:FUNC1.c
#define ARM_M7
#include "funcb.h" 

#define thj_FUNC1

void FUNC1(WORD W, BIT B)
{
	asm("PUSH {R0}");
	asm("MRS R0,CONTROL");
	asm("ORR R0,R0,#0x1");
	asm("MSR CONTROL,R0");
	asm("POP {R0}");

	short NeedCompileSysRegAddr;

	extern short __HD;
	short* HD = (short*)&__HD;
	char* B_HD = (char*)&__HD;

	extern short __D;
	short* D = (short*)&__D;
	char* B_D = (char*)&__D;

	extern char __HM;
	INT32U HM = (INT32U)&__HM;

	extern char __M;
	INT32U M = (INT32U)&__M;

	unsigned long* p0 = (unsigned long*)&D[0];
	(*p0)++;

#define pD4_Float   (( float * ) &D[4])
	* pD4_Float = 1.234;

	strcpy((char*)&D[20], "a一二b1234");
	*((wchar_t*)&D[30]) = L'\x1234';
	*((double*)&D[40]) = sqrt(2);
	*((double*)&D[50]) = 1122334455.0;

	asm("svc 0x01");
}
//end_FUNC1.c

//file:FUNC1.i
void FUNC1_i(INT16S* W, INT32U B)
{
	asm("PUSH {R0}");
	asm("MRS R0,CONTROL");
	asm("ORR R0,R0,#0x1");
	asm("MSR CONTROL,R0");
	asm("POP {R0}");

#define SysRegAddr_HD_D_HM_M
	short NeedCompileSysRegAddr;

	extern short __HD;
	short* HD = (short*)&__HD;
	char* B_HD = (char*)&__HD;

	extern short __D;
	short* D = (short*)&__D;
	char* B_D = (char*)&__D;

	extern char __HM;
	INT32U HM = (INT32U)&__HM;

	extern char __M;
	INT32U M = (INT32U)&__M;
//end_define

	unsigned long* p0 = (unsigned long*)&D[0];
	(*p0)++;

	*((float*)&D[4]) = 1.234;

	strcpy((char*)&D[20], "a一二b1234");
	*((wchar_t*)&D[30]) = L'\x1234';
	*((double*)&D[40]) = sqrt(2);
	*((double*)&D[50]) = 1122334455.0;

	asm("svc 0x01");
}
//end_FUNC1.i