checkpoint

diff --git a/src/com/atmel/fpslic/FpslicPins.java b/src/com/atmel/fpslic/FpslicPins.java
new file mode 100644 (file)
index 0000000..36bf651
--- /dev/null
+++ b/src/com/atmel/fpslic/FpslicPins.java
@@ -0,0 +1,23 @@
+package com.atmel.fpslic;
+import com.ftdi.usb.*;
+import java.io.*;
+
+/**
+ * Exposes the raw pin-level configuration interface to the FPSLIC
+ */
+public interface FpslicPins {
+    public void    avrrstPin(boolean on)     throws IOException;
+    public void    cclkPin(boolean on)       throws IOException;
+    public void    configDataPin(boolean on) throws IOException;
+    public void    resetPin(boolean on)      throws IOException;
+    public boolean initPin()                 throws IOException;
+    public void    releaseConPin()           throws IOException;
+    public void    conPin(boolean on)        throws IOException;
+
+    public void    flush()                   throws IOException;
+    public void    close()                   throws IOException;
+
+    public InputStream  getUartInputStream() throws IOException;
+    public OutputStream getUartOutputStream() throws IOException;
+}
+

diff --git a/src/com/atmel/fpslic/FpslicPinsUsb.java b/src/com/atmel/fpslic/FpslicPinsUsb.java
new file mode 100644 (file)
index 0000000..ebd25d3
--- /dev/null
+++ b/src/com/atmel/fpslic/FpslicPinsUsb.java
@@ -0,0 +1,81 @@
+package com.atmel.fpslic;
+import com.ftdi.usb.*;
+import java.io.*;
+
+/**
+ * Exposes the raw pin-level configuration interface to the FPSLIC
+ */
+public class FpslicPinsUsb implements FpslicPins {
+
+    private FtdiUart ftdiuart;
+
+    public FpslicPinsUsb(FtdiUart ftdiuart) {
+        this.ftdiuart = ftdiuart;
+    }
+
+    public void avrrstPin(boolean on)     throws IOException { setDBusLine(7, on); }
+    public void cclkPin(boolean on)       throws IOException { setDBusLine(6, on); }
+    public void configDataPin(boolean on) throws IOException { setDBusLine(5, on); }
+    public boolean initPin()              throws IOException { flush(); return (ftdiuart.readPins() & (1<<4))!=0; }
+
+    // tricky: RESET has a weak pull-up, and is wired to a CBUS line.  So,
+    //         we can pull it down (assert reset) from uart-mode, or we can
+    //         let it float upward from either mode.
+    public void resetPin(boolean on) throws IOException {
+        ftdiuart.uart_and_cbus_mode(1<<1, on ? (1<<1) : 0);
+        flush();
+        if (on) {
+            ftdiuart.dbus_mode(dmask);
+            flush();
+        }
+    }
+
+    public void flush() throws IOException { ftdiuart.getOutputStream().flush(); }
+
+    private int dbits = 0;
+    public void setDBusLine() throws IOException {
+        ftdiuart.getOutputStream().write((byte)dbits);
+    }
+    public void clearDBusLines() throws IOException {
+        dbits = 0;
+        setDBusLine();
+    }
+    public void setDBusLine(int bit, boolean val) throws IOException {
+        dbits = val ? (dbits | (1 << bit)) : (dbits & (~(1 << bit)));
+        setDBusLine();
+    }
+    
+    public void releaseConPin() throws IOException {
+        dmask &= ~(1<<0);
+        ftdiuart.dbus_mode(dmask);
+        flush();
+    }
+
+    public void conPin(boolean on) throws IOException {
+        dmask |= (1<<0);
+        ftdiuart.dbus_mode(dmask);
+        setDBusLine(0, on);
+        flush();
+    }
+
+    public void close() throws IOException {
+        // switching to uart mode will implicitly release AVRRST
+        avrrstPin(false);
+        ftdiuart.purge();
+        ftdiuart.uart_and_cbus_mode(1<<1, 1<<1);
+    }
+    
+    private int dmask =
+        (1<<0) |
+        (1<<1) |
+        (1<<2) |
+        //(1<<3) |
+        //(1<<4) |
+        (1<<5) |
+        (1<<6) |
+        (1<<7);
+
+    public InputStream  getUartInputStream() throws IOException { return ftdiuart.getInputStream(); }
+    public OutputStream getUartOutputStream() throws IOException { return ftdiuart.getOutputStream(); }
+}
+