Assembly and C

Anonymous · ‎Sep 23, 2011

Hi

I am using CY8C27443-24PXI and developing code in C.

At this point I want to make function call from main C code and I want to write function in assembly.

Please suggest how can I do it.

Regards,

pushekm_21 · ‎Sep 25, 2011

When you are declaring the function in assembly then make sure you have "_" appended in front of the function name. When you are appending "_" in front of the function name then you can call the function from C files. An example given below first of all exports the function for other assembly and C files. "_MyFunc_Start" is for the C files and "MyFunc_Start" is for assembly files. Similarly at the time of definitiion as well, we have to use two names to make this name accessible to both assembly and C files.

Please note that from C file as well, you have to call the function with name MyFunc_Start only.

export _MyFunc_Start

export MyFunc_Start

SmartSense_Start:

_SmartSense_Start:

; Your function code

ret

Once done, you can give the prototype of the function in a header file or the c file in which you want to call this function.

Best regards,

Pushek

pushekm_21 · ‎Sep 25, 2011

When you are declaring the function in assembly then make sure you have "_" appended in front of the function name. When you are appending "_" in front of the function name then you can call the function from C files. An example given below first of all exports the function for other assembly and C files. "_MyFunc_Start" is for the C files and "MyFunc_Start" is for assembly files. Similarly at the time of definitiion as well, we have to use two names to make this name accessible to both assembly and C files.