checkpoint

[slipway.git] / src / edu / berkeley / obits / device / atmel / ChipImpl.java

diff --git a/src/edu/berkeley/obits/device/atmel/ChipImpl.java b/src/edu/berkeley/obits/device/atmel/ChipImpl.java
index 5cb10ec..05ed4f2 100644 (file)
--- a/src/edu/berkeley/obits/device/atmel/ChipImpl.java
+++ b/src/edu/berkeley/obits/device/atmel/ChipImpl.java
@@ -2,7 +2,17 @@ package edu.berkeley.obits.device.atmel;
 import com.ftdi.usb.*;
 import java.io.*;
 
-public class ChipImpl extends FtdiChip implements Chip {
+public class ChipImpl extends FtdiUart implements Chip {
+
+    private int dmask =
+        (1<<0) |
+        (1<<1) |
+        (1<<2) |
+        //(1<<3) |
+        //(1<<4) |
+        (1<<5) |
+        (1<<6) |
+        (1<<7);
 
     public ChipImpl() {
         super();
@@ -10,22 +20,42 @@ public class ChipImpl extends FtdiChip implements Chip {
     }
 
     public void doReset() {
+
+        dmask =
+            (1<<0) |
+            (1<<1) |
+            (1<<2) |
+            //(1<<3) |
+            //(1<<4) |
+            (1<<5) |
+            (1<<6) |
+            (1<<7);
+        avrrst(false);
+
+        flush();
+        //purge();
+
         dbangmode(dmask);
+        flush();
+
         clk(false);
         data(false);
-
         con(false);
         flush();
-        buffered(false);
+        //try { Thread.sleep(500); } catch (Exception e) { }
+
         reset(false);
-        //avrrst(false);
-        try { Thread.sleep(200); } catch (Exception e) { }
-        reset(true);
-        //avrrst(true);
-        try { Thread.sleep(200); } catch (Exception e) { }
+        flush();
+        try { Thread.sleep(500); } catch (Exception e) { }
+        if (initErr()) throw new RuntimeException("INIT was still high after pulling RESET low");
+        //System.out.println("0 con() = " + con());
 
-        dmask &= ~(1<<7);
-        dbangmode(dmask);
+        reset(true);
+        flush();
+        try { Thread.sleep(500); } catch (Exception e) { }
+        if (!initErr()) throw new RuntimeException("INIT was still low after releasing RESET");
+        //System.out.println("1 con() = " + con());
+        con(false);
     }
 
     int porte = 0;
@@ -37,9 +67,6 @@ public class ChipImpl extends FtdiChip implements Chip {
         }
     }
 
-
-    //
-
     public void config(boolean bit) { config(bit?1:0, 1); }
     public void config(int dat) { config(dat, 8); }
     public void config(int dat, int numbits) {
@@ -51,33 +78,45 @@ public class ChipImpl extends FtdiChip implements Chip {
         }
     }
 
-    protected int dmask =
-        //(1<<0) |
-        (1<<1) |
-        (1<<2) |
-        //(1<<3) |
-        //(1<<4) |
-        (1<<5) |
-        (1<<6) |
-        (1<<7);
-
+    // 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 reset(boolean on) {
         bits = on ? (1<<1) : 0;
+        mask = (1<<1);
         uart();
+        flush();
+        if (on) {
+            //mask = 0;
+            //uart();
+            //flush();
+            dbangmode(dmask);
+            flush();
+        }
     }
+
     public void avrrst(boolean on) { dbang(7, on); }
     public void clk(boolean on)    { dbang(6, on); }
     public void data(boolean on)   { dbang(5, on); }
 
-    public boolean initErr()       { return (readPins() & (1<<4))!=0; }
+    public boolean initErr()       { flush(); return (readPins() & (1<<4))!=0; }
+
     public boolean con() {
+        flush();
+        //dmask &= ~(1<<0);
+        dbangmode(dmask);
+        return (readPins() & (1<<0)) != 0;
+    }
+    public boolean rcon() {
+        flush();
         dmask &= ~(1<<0);
         dbangmode(dmask);
         return (readPins() & (1<<0)) != 0;
     }
     public void con(boolean on) {
+        flush();
         dmask |= (1<<0);
-        dbangmode(dmask);
         dbang(0, on);
+        dbangmode(dmask);
     }
 }