Fixed the chip identification message and added some chip debug output.

dozencrows · Feb 5, 2013 · 419c5cc · 419c5cc
1 parent f86eaf9
commit 419c5cc
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Showing 3 changed files with 10 additions and 5 deletions.
diff --git a/config.c b/config.c
@@ -199,6 +199,7 @@ int init_config(void)
       }
     }
     setup_xio(j);
+    test_iic(xio_dev[j].addr, xio_dev[j].regno);
   }
 
 
@@ -402,12 +403,16 @@ static void setup_xio(int xio)
 
   switch(xio_dev[xio].type){
   case IO_MCP23008:
-  case IO_MCP23017A:
     write_iic(addr, 0, cfg_dat, 7); 
     printf("Configuring MCP23008\n");
     break;
+  case IO_MCP23017A:
+    write_iic(addr, 0, cfg_dat, 7); 
+    printf("Configuring MCP23017 port A\n");
+    break;
   case IO_MCP23017B:
     write_iic(addr, 0x10, cfg_dat, 7); 
+    printf("Configuring MCP23017 port B\n");
     break;
   default:
     break;

diff --git a/iic.c b/iic.c
@@ -83,11 +83,11 @@ int write_iic(int devAddr, int regno, char *buf, int n)
 }
 
 
-void test_iic(int devAddr)
+void test_iic(int devAddr, int regaddr)
 {
   int i,n;
 
-  buffer[0] = 0;
+  buffer[0] = regaddr;
 
   connect_iic(devAddr);
 
@@ -102,7 +102,7 @@ void test_iic(int devAddr)
     perror("Error reading from i2c");
   }
   else{
-    printf("Read %d bytes\n",n);
+    printf("Read %d bytes from %02x/%02x\n",n, devAddr, regaddr);
     for(i=0;i<n;i++){
       printf("  %02x", (unsigned char)buffer[i]);
     }

diff --git a/iic.h b/iic.h
@@ -38,7 +38,7 @@ int init_iic(void);
 int connect_iic(int devAddr);
 void poll_iic(int xio);
 int write_iic(int devAddr, int regno, char *buf, int n);
-void test_iic(int devAddr);
+void test_iic(int devAddr, int regaddr);
 void close_iic(void);
 
 #endif