Added I2C address macros

2 files changed, 20 insertions, 3 deletions

diff --git a/i2c.h b/i2c.h
index 6c0e5b9..d65a596 100644
--- a/i2c.h
+++ b/i2c.h
@@ -1,4 +1,21 @@
 #include <glib.h>
 
+#define PCF8574                 0x20	/* secondary I2C peripheral device */
+#define Second_PW_Port          0               /* PCF8574 at three-bit address 0 is for dual PW board (1021D) */
+#define Second_Dly_Port         1               /* PCF8574 at three-bit address 1 is for dual delay board (AVX-DD-A3-PS-TC) */
+#define To_Self_Cal_Port        2               /* PCF8574 at three-bit address 2 is for self-cal PCB 226A */
+#define From_Self_Cal_Port      3               /* PCF8574 at three-bit address 3 is for self-cal PCB 226A */
+
+#define PCF8574A                0x38    /* Main I2C peripheral device */
+#define Button_Press_Port       0               /* PCF8574A at three-bit address 0 is for detecting button presses */
+#define LCD_Port                1               /* PCF8574A at three-bit address 1 is for LCD */
+#define Lower_Encoder_Port      2               /* PCF8574A at three-bit address 2 is for lower encoder counters */
+#define Upper_Encoder_Port      3               /* PCF8574A at three-bit address 3 is for upper encoder counter */
+#define Curr_Mon_LSB            4               /* PCF8574A at three-bit address 4 is for current monitor */
+#define Curr_Mon_MSB            5               /* PCF8574A at three-bit address 5 is for current monitor */
+#define rise_time_port          4               /* PCF8574A at three-bit address 4 is for rise time circuit in AVRQ */
+
+/* 6 and 7 reserved for dual-channel current monitor */
+
 int I2C_Write(gulong address, guchar value);
 guchar I2C_Read(gulong address);
diff --git a/response.c b/response.c
index 6871a82..d0951d3 100644
--- a/response.c
+++ b/response.c
@@ -107,9 +107,9 @@ void responseCb(gpointer instance, GObject *arg1, gpointer user_data)
 	g_strstrip (str);
 
 	guchar status = 0;  // delete me, later - FIXME
-	I2C test code
-	I2C_Write (0x3b, 0xff);
-	status = I2C_Read (0x3b);
+	// I2C test code
+	I2C_Write (PCF8574A + Upper_Encoder_Port, 0xff);
+	status = I2C_Read (PCF8574A + Upper_Encoder_Port);
 
 	// dummy response function
         gchar* upper = g_ascii_strup(str, len);