From 70b8b7f2d766f4ca131f9fa299546eb3697db8d4 Mon Sep 17 00:00:00 2001
From: Nao Pross <naopross@thearcway.org>
Date: Thu, 23 Mar 2017 20:42:26 +0100
Subject: changed scheme layout

hw: changed scheme and annotated components

doc: added build script for windows

sw: added res/ folder with blaster and created jedec document for
	address decoder pld
---
 .../userport/UserPort/Examples/IOPort.c            | 76 ++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 res/ATFBlast_ALL/userport/UserPort/Examples/IOPort.c

(limited to 'res/ATFBlast_ALL/userport/UserPort/Examples/IOPort.c')

diff --git a/res/ATFBlast_ALL/userport/UserPort/Examples/IOPort.c b/res/ATFBlast_ALL/userport/UserPort/Examples/IOPort.c
new file mode 100644
index 0000000..7cef182
--- /dev/null
+++ b/res/ATFBlast_ALL/userport/UserPort/Examples/IOPort.c
@@ -0,0 +1,76 @@
+#include <windows.h>
+static BOOL bPrivException = FALSE;
+
+void outport(UINT portid, UINT value)
+{
+  __asm mov edx,portid;
+  __asm mov eax,value;
+  __asm out dx,ax;
+}
+void outportb(UINT portid, BYTE value)
+{
+  __asm mov edx,portid
+  __asm mov al,value
+  __asm out dx,al
+}
+
+BYTE inportb(UINT portid)
+{
+  unsigned char value;
+  
+  __asm mov edx,portid
+  __asm in al,dx
+  __asm mov value,al
+  return value;
+}
+
+UINT inport(UINT portid)
+{
+  int value=0;
+  __asm mov edx,portid
+  __asm in ax,dx
+  __asm mov value,eax
+  return value;
+}
+
+LONG WINAPI HandlerExceptionFilter ( EXCEPTION_POINTERS *pExPtrs )
+{
+
+	if (pExPtrs->ExceptionRecord->ExceptionCode == EXCEPTION_PRIV_INSTRUCTION)
+	{
+		pExPtrs->ContextRecord->Eip ++; // Skip the OUT or IN instruction that caused the exception
+		bPrivException = TRUE;
+		return EXCEPTION_CONTINUE_EXECUTION;
+	}
+	else
+		return EXCEPTION_CONTINUE_SEARCH;
+}
+
+BOOL StartUpIoPorts(UINT PortToAccess, BOOL bShowMessageBox, HWND hParentWnd)
+{
+	HANDLE hUserPort;
+
+  hUserPort = CreateFile("\\\\.\\UserPort", GENERIC_READ, 0, NULL,OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+  CloseHandle(hUserPort); // Activate the driver
+	Sleep(100); // We must make a process switch
+
+	SetUnhandledExceptionFilter(HandlerExceptionFilter);
+	
+	bPrivException = FALSE;
+	inportb(PortToAccess);  // Try to access the given port address
+
+	if (bPrivException)
+	{
+		if (bShowMessageBox)
+		{
+    	MessageBox(hParentWnd,"Privileged instruction exception has occured!\r\n\r\n"
+												 "To use this program under Windows NT or Windows 2000\r\n"
+												 "you need to install the driver 'UserPort.SYS' and grant\r\n"
+												 "access to the ports used by this program.",
+												 NULL,MB_OK);
+    }
+		return FALSE;
+	}
+	return TRUE;
+}
+
-- 
cgit v1.2.1