Changes between Version 7 and Version 8 of HardwareUsersGuides/FPGABoard_v2.2/UserIO/warp_v4_userio

Timestamp:

Oct 18, 2009, 11:17:00 PM (15 years ago)

Author:

sgupta

Comment:

--

HardwareUsersGuides/FPGABoard_v2.2/UserIO/warp_v4_userio

@@ -6 +6 @@
 
 The core has 5 registers that enable the I/O functionality. Register 0 and 1 are the output and input registers for the dedicated I/O, namely the LEDs, the push buttons and the DIP switch.
-
-[[Image(HardwareUsersGuides/FPGABoard_v2.2/Files:reg0reg1.jpg)]]
-
 
 == Functions ==
@@ -55 +52 @@
 }}}
 
-Once configured for number mode, the number to be written is controlled by the following:
+Once configured for number mode, the display will show the number written by the following function:
 
 {{{
@@ -62 +59 @@
 
 where ''number'' is the number desired at the display and ''decimal'' is to toggle the decimal point. If ''decimal'' is 1 then the decimal point in on.
+
+In addition, the number written can be read out by:
+
+{{{
+WarpV4_UserIO_ReadNumber_[LeftHex|MiddleHex|RightHex](baseaddress)
+}}}
+
+where the return value is the four bit value corresponding to the last number written. Additionally, as 0x0 corresponds to a number zero being displayed instead of turning the displays off, the following functions toggle the visibility of the numbers:
+
+{{{
+WarpV4_UserIO_[LeftHex|MiddleHex|RightHex]_Off(baseaddress)
+WarpV4_UserIO_[LeftHex|MiddleHex|RightHex]_On(baseaddress)
+}}}
+
+Toggling the visibility will not alter the values to be shown. Note: these function only works in Number Mode.
+
+The second mode for the hex displays is raw mode where each segment in the display can be controlled independently. To enable raw mode the following functions are used:
+
+{{{
+WarpV4_UserIO_RawMode_All(baseaddress)
+WarpV4_UserIO_RawMode_[LeftHex|MiddleHex|RightHex](baseaddress)
+}}}
+
+[[Image(attachment:HardwareUsersGuides/FPGABoard_v2.2/Files:hex_display.jpg)]]