Ollie Milton
Driver for a CD22M3494 cross point switcher
Library description
The CD22M3494 is a 16x8 crosspoint switch matrix, it can be used in any configuration i.e. 16 ins' 8 outs' or 16 outs' and 8 ins'. Control of the chip is pretty simple there are two parallel address buses a 4 byte address controls the X axis (16 IO pins) and a 3 byte address controls the Y axis (8 IO pins). A data bus says whether to open or close the switch and a 'strobe' bus actually performs the switch. This library provides a simple interface to control the CD22M3494 and provides a mechanism to associate source and destinations in pairs and switch the pairs via their names.
Diff: CD22M3494.h
- Revision:
- 6:3f51c9139496
- Parent:
- 5:ca315c82dc1b
- Child:
- 7:6dc462dd6a0a
--- a/CD22M3494.h Thu Sep 19 11:56:37 2013 +0000
+++ b/CD22M3494.h Wed Oct 09 12:48:33 2013 +0000
@@ -94,6 +94,12 @@
#define MAX_X 0x0F
#define MAX_Y 0x7
+struct Association {
+ string name;
+ string xp1;
+ string xp2;
+};
+
/**A driver for the CD22M3494 crosspoint switch matrix.
*/
class CD22M3494 {
@@ -157,7 +163,7 @@
associationTable.clear();
delete &associationTable;
}
-
+
/**Closes the switch at the given cross point.
*
* @param x the x axis
@@ -212,7 +218,9 @@
assoc->xp1 = xp1;
assoc->xp2 = xp2;
associationTable[name] = assoc;
+ return true;
}
+ return false;
}
/**Connects all the crosspoints for the given associations.
@@ -242,18 +250,17 @@
}
return false;
}
-
+
+ Association* getAssociation(string name) {
+ return associationTable[name];
+ }
+
private:
BusOut *xbus;
BusOut *ybus;
DigitalOut *data;
DigitalOut *obe;
- DigitalOut *reset;
- struct Association {
- string name;
- string xp1;
- string xp2;
- };
+ DigitalOut *reset;
map<string, Association*> associationTable;
map<string, unsigned short> crosspointLookup;
};