From c0c55edfecf1ae872f6ced4085f174bb3fe52d24 Mon Sep 17 00:00:00 2001
From: josh <josh@bd8a9e45-a331-0410-811e-c64571078777>
Date: Sun, 3 May 2009 23:14:54 +0000
Subject: [PATCH] added VFD::write(), VFD destructor, and driver code

git-svn-id: svn://anubis/misc/parport-2x20vfd@113 bd8a9e45-a331-0410-811e-c64571078777
---
 VFD.cc    | 14 ++++++++++++++
 VFD.h     |  4 ++++
 driver.cc |  8 ++++++++
 3 files changed, 26 insertions(+)

diff --git a/VFD.cc b/VFD.cc
index 06d990c..b31355c 100644
--- a/VFD.cc
+++ b/VFD.cc
@@ -23,6 +23,12 @@ VFD::VFD()
     m_ppfd = -1;
 }
 
+VFD::~VFD()
+{
+    if (m_ppfd >= 0)
+        disconnect();
+}
+
 bool VFD::connect(const std::string & parport)
 {
     const int mode = IEEE1284_MODE_BYTE;
@@ -152,3 +158,11 @@ void VFD::writeData(unsigned char data)
 {
     sendByte(1, data);
 }
+
+void VFD::write(const std::string & str)
+{
+    for (const char * chr = str.c_str(); *chr; chr++)
+    {
+        writeData(*chr);
+    }
+}
diff --git a/VFD.h b/VFD.h
index 2851f5c..172a63f 100644
--- a/VFD.h
+++ b/VFD.h
@@ -38,8 +38,11 @@ class VFD
         static const unsigned char RIGHT = 1;
         static const unsigned char OFF = 0;
         static const unsigned char ON = 1;
+        static const unsigned char ADDRESS_LINE1 = 0x80;
+        static const unsigned char ADDRESS_LINE2 = 0xC0;
 
         VFD();
+        ~VFD();
         bool connect(const std::string & parport = "/dev/parport0");
         void disconnect();
 
@@ -55,6 +58,7 @@ class VFD
         void setCGAddress(unsigned char address);
         void setAddress(unsigned char address);
         void writeData(unsigned char data);
+        void write(const std::string & str);
 
     protected:
         static const unsigned char RW_WRITE = 0;
diff --git a/driver.cc b/driver.cc
index 4c212be..189ed64 100644
--- a/driver.cc
+++ b/driver.cc
@@ -8,5 +8,13 @@ int main(int argc, char ** argv)
 {
     cout << "Working on VFD module" << endl;
 
+    VFD vfd;
+
+    vfd.connect();
+    vfd.setDisplay(1, 0, 0);
+    vfd.setAddress(VFD::ADDRESS_LINE1);
+    vfd.write("Hi there!");
+    vfd.disconnect();
+
     return 0;
 }