基于S3C2440的GPIO驱动及其访问LED的应用程序

#include <windows.h> #include <ceddk.h> #include <s3c2410x_base_regs.h> #include <s3c2410x_ioport.h> volatile S3C2410X_IOPORT_REG * g_pIOPregs; UINT32 g_rGPFCONBak,g_rGPFUPBak,g_rGPFDATBak; BOOL WINAPI DllEntryPoint(HANDLE hInstDLL, DWORD dwReason, LPVOID lpvReserved) { switch(dwReason) { case DLL_PROCESS_ATTACH: RETAILMSG(1, (TEXT("***GPIOled:DLL_PROCESS_ATTACH\n"))); break; case DLL_THREAD_ATTACH: RETAILMSG(1, (TEXT("***GPIOled:DLL_THREAD_ATTACH\n"))); break; case DLL_THREAD_DETACH: RETAILMSG(1, (TEXT("***GPIOled:DLL_THREAD_DETACH\n"))); break; case DLL_PROCESS_DETACH: RETAILMSG(1, (TEXT("***GPIOled:DLL_PROCESS_DETACH\n"))); break; #ifdef UNDER_CE case DLL_PROCESS_EXITING: RETAILMSG(1, (TEXT("***GPIOled:DLL_PROCESS_EXITING\n"))); break; case DLL_SYSTEM_STARTED: RETAILMSG(1, (TEXT("***GPIOled:DLL_SYSTEM_STARTED\n"))); break; #endif } return TRUE; } DWORD GIO_Init(DWORD dwContext) { PHYSICAL_ADDRESS PA; RETAILMSG(1, (TEXT("***GPIOLED: GIO_Init\r\n"))); // Allocate a drive instance structure. PA.QuadPart = S3C2410X_BASE_REG_PA_IOPORT; g_pIOPregs = (S3C2410X_IOPORT_REG *)MmMapIoSpace(PA,sizeof(S3C2410X_IOPORT_REG),FALSE); if(g_pIOPregs) { return TRUE; } RETAILMSG(1, (TEXT("***GPIOLED: GIO_Init fail\r\n"))); return FALSE; } BOOL GIO_Deinit(DWORD hDeviceContext) { RETAILMSG(1, (TEXT("***GPIOLED: GIO_Deinit\r\n"))); MmUnmapIoSpace((PVOID)g_pIOPregs,sizeof(S3C2410X_IOPORT_REG)); return TRUE; } DWORD GIO_Open(DWORD hDeviceContext, DWORD AccessCode, DWORD ShareMode) { RETAILMSG(1, (TEXT("***GPIOLED: GIO_Open\r\n"))); //backup register g_rGPFCONBak = g_pIOPregs->GPFCON ; g_rGPFUPBak = g_pIOPregs->GPFUP; g_rGPFDATBak = g_pIOPregs->GPFDAT; //Set register g_pIOPregs->GPFCON = 0x55aa; g_pIOPregs->GPFUP = 0xff; return TRUE; } BOOL GIO_Close(DWORD hOpenContext) { RETAILMSG(1, (TEXT("***GPIOLED: GIO_Close\r\n"))); //restore registert g_pIOPregs->GPFCON = g_rGPFCONBak; g_pIOPregs->GPFUP = g_rGPFUPBak; g_pIOPregs->GPFDAT = g_rGPFDATBak; return TRUE; } BOOL GIO_IOControl(DWORD hOpenContext, DWORD dwCode, PBYTE pBufIn, DWORD dwLenIn, PBYTE pBufOut, DWORD dwLenOut, PDWORD pdwActualOut) { return TRUE; } void GIO_PowerDown(DWORD hDeviceContext) { } void GIO_PowerUp(DWORD hDeviceContext) { } DWORD GIO_Read(DWORD hOpenContext, LPVOID pBuffer, DWORD Count) { if(Count >= sizeof(DWORD)) { return sizeof(DWORD); } return 0; } DWORD GIO_Seek(DWORD hOpenContext, long Amount, DWORD Type) { return 0; } DWORD GIO_Write(DWORD hOpenContext, LPCVOID pBuffer, DWORD NumberOfBytes) { RETAILMSG(1, (TEXT("***GPIOLED: GIO_Write\r\n"))); g_pIOPregs->GPFDAT = ((*(BYTE*)pBuffer)&0xf0)|(g_pIOPregs->GPFDAT&0x0f); return TRUE; }