# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1360603989 0
# Node ID f40addd6c8cd5694c8b5575f0b636afa53180fc1
# Parent  592b63226b52a188e66888fa87c476be8c5f9218
Fixed interrupt detection by testing for INT being low, not high.
Removed various verbose diagnostic statements.
Added a signal handler to attempt a clean shutdown when the program is
interrupted.

diff -r 592b63226b52 -r f40addd6c8cd test.c
--- a/test.c	Mon Feb 11 16:48:30 2013 +0000
+++ b/test.c	Mon Feb 11 17:33:09 2013 +0000
@@ -17,6 +17,8 @@
 #include <stdio.h>
 #include <time.h>
 #include <unistd.h>
+#include <signal.h>
+#include <stdlib.h>
 
 /* Pin assignments:
  *
@@ -252,11 +254,20 @@
     return !(result & MAX_HCTL_SAMPLEBUS);
 }
 
+void shutdown(int signum)
+{
+    printf("Closing...\n");
+    ubb_close(0);
+    exit(1);
+}
+
 int main(int argc, char *argv[])
 {
-    uint8_t status = 0, revision = 0, hrsl = 0;
+    uint8_t status = 0, revision = 0;
     uint16_t count;
 
+    signal(SIGINT, &shutdown);
+
     if (ubb_open(0) < 0) {
         perror("ubb_open");
         return 1;
@@ -299,15 +310,12 @@
 
     printf("Setting mode...\n");
     status = max_write(MAX_REG_MODE, MAX_MODE_HOST | MAX_MODE_SEPIRQ_OFF | MAX_MODE_DMPULLDN | MAX_MODE_DPPULLDN);
-    printf("Status = %x\n", status);
 
     printf("Setting INT signalling...\n");
     status = max_write(MAX_REG_CPUCTL, MAX_CPUCTL_IE);
-    printf("Status = %x\n", status);
 
     printf("Setting connection signalling...\n");
     status = max_write(MAX_REG_HIEN, MAX_HIEN_CONDETIE);
-    printf("Status = %x\n", status);
 
     /* Check various registers. */
 
@@ -323,26 +331,22 @@
 
     printf("Reading...\n");
     revision = max_read(MAX_REG_REVISION, &status);
-    printf("Status = %x\n", status);
     printf("Revision = %x\n", revision);
 
-    for (count = 0; count < 10; count++)
+    for (count = 0; count <= 65535; count++)
     {
-        printf("INT? %d\n", PIN(MAX_INT));
-        printf("Status = %x\n", status);
-
-        if (PIN(MAX_INT))
+        if (!PIN(MAX_INT))
         {
-            if (status & (MAX_HIRQ_SUSDNIRQ | MAX_HIRQ_CONDETIRQ))
-            {
-                printf("HRSL...\n");
-                hrsl = max_read(MAX_REG_HRSL, &status);
-                printf("Status = %x\n", status);
-                printf("HRSL = %x\n", hrsl);
-            }
+            if (status & MAX_HIRQ_CONDETIRQ)
+                printf("Device connected.\n");
+            if (status & MAX_HIRQ_SUSDNIRQ)
+                printf("Suspend done.\n");
+            if (status & MAX_HIRQ_BUSEVENTIRQ)
+                printf("Bus event.\n");
+            if (status & MAX_HIRQ_RCVDAVIRQ)
+                printf("Data received.\n");
 
-            printf("Clearing status...\n");
-            max_write(MAX_REG_HIRQ, status & (MAX_HIRQ_SUSDNIRQ | MAX_HIRQ_SNDBAVIRQ | MAX_HIRQ_BUSEVENTIRQ));
+            max_write(MAX_REG_HIRQ, status);
         }
     }