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Comments by Member 9063138 (Top 2 by date)
Member 9063138
8-Jun-12 8:45am
View
HI....
I TRY THE FOLLOWING CODE!!!!:
#include <stdio.h>
#include <conio.h>
#include <windows.h>
/* Definitions in the build of inpout32.dll are: */
/* short _stdcall Inp32(short PortAddress); */
/* void _stdcall Out32(short PortAddress, short data); */
/* prototype (function typedef) for DLL function Inp32: */
typedef short (_stdcall *inpfuncPtr)(short portaddr);
typedef void (_stdcall *oupfuncPtr)(short portaddr, short datum);
#define PPORT_BASE 0x378
// Prototypes for Test functions
void test_read8(void);
void test_write(void);
void test_write_datum(short datum);
/* After successful initialization, these 2 variables
will contain function pointers.
*/
inpfuncPtr inp32fp;
oupfuncPtr oup32fp;
/* Wrapper functions for the function pointers
- call these functions to perform I/O.
*/
short Inp32 (short portaddr)
{
return (inp32fp)(portaddr);
}
void Out32 (short portaddr, short datum)
{
(oup32fp)(portaddr,datum);
}
int main(void)
{
HINSTANCE hLib;
short x;
int i;
/* Load the library */
hLib = LoadLibrary("inpout32.dll");
if (hLib == NULL) {
fprintf(stderr,"LoadLibrary Failed.\n");
return -1;
}
/* get the address of the function */
inp32fp = (inpfuncPtr) GetProcAddress(hLib, "Inp32");
if (inp32fp == NULL) {
fprintf(stderr,"GetProcAddress for Inp32 Failed.\n");
return -1;
}
oup32fp = (oupfuncPtr) GetProcAddress(hLib, "Out32");
if (oup32fp == NULL) {
fprintf(stderr,"GetProcAddress for Oup32 Failed.\n");
return -1;
}
/*******************************************************/
/** IF WE REACHED HERE, INITIALIZED SUCCESSFUL ******/
/*******************************************************/
/* now test the functions */
/***** Read 8 bytes at I/O base address */
test_read8();
/***** Write 0x75 to data register and verify */
test_write();
/***** One more time, different value */
test_write_datum(0xAA);
/* finished - unload library and exit */
FreeLibrary(hLib);
return 0;
}
/*
TEST: Read inputs of 8 registers from PORT_BASE address
*/
void test_read8(void) {
short x;
int i;
/* Try to read 0x378..0x37F, LPT1: */
for (i=PPORT_BASE; (i<(PPORT_BASE+8)); i++) {
x = Inp32(i);
printf("Port read (%04X)= %04X\n",i,x);
}
}
/*
TEST: Write constant 0x77 to PORT_BASE (Data register)
*/
void test_write(void) {
short x;
int i;
/***** Write the data register */
i=PPORT_BASE;
x=0x75;
/***** Write the data register */
Out32(i,x);
printf("Port write to 0x%X, datum=0x%2X\n" ,i ,x);
/***** And read back to verify */
x = Inp32(i);
printf("Port read (%04X)= %04X\n",i,x);
/***** Set all bits high */
x=0xFF;
Out32(i,x);
/***** Now, set bi-directional and read again */
Out32(PPORT_BASE+2,0x20); // Activate bi-directional
x = Inp32(i);
printf("Set Input, read (%04X)= %04X\n",i,x);
Out32(PPORT_BASE+2,0x00); // Set Output-only again
x = Inp32(i);
printf("Reset Ouput, read (%04X)= %04X\n",i,x);
}
/*
TEST: Write data from parameter
*/
void test_write_datum(short datum) {
short x;
int i;
i=PPORT_BASE;
x = datum;
/***** Write the data register */
Out32(i,x);
printf("Port write to 0x%X, datum=0x%2X\n" ,i ,x);
/***** And read back to verify */
x = Inp32(i);
printf("Port read (%04X)= %04X\n",i,x);
}
BUT ERREOR HAPPEND:
error C2664: 'LoadLibraryW' : cannot convert parameter 1 from 'const char [13]' to 'LPCWSTR'
WHY????????????
Member 9063138
3-Jun-12 7:08am
View
SORRY LINK IS NOT OPEN?? WHY