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:
- 1:bc9ca1d1d7a6
- Parent:
- 0:5ef90cd25c10
- Child:
- 2:25049dc7da13
--- a/CD22M3494.h Tue Sep 03 12:49:43 2013 +0000
+++ b/CD22M3494.h Tue Sep 10 21:34:24 2013 +0000
@@ -2,6 +2,12 @@
#define CD22M3494_H
#include <mbed.h>
+
+#include <map>
+//using std::map;
+#include <string>
+//using std::string;
+
/*
X ADDRESS
AX3 AX2 AX1 AX0 X SWITCH
@@ -119,13 +125,39 @@
}
return false;
}
-
+
+ void associate(string name, unsigned short xp1, unsigned short xp2) {
+ unsigned short xps[2];
+ xps[0] = xp1;
+ xps[1] = xp2;
+ associationTable[name] = xps;
+ }
+
+ bool routeAssociations(string src, string dst) {
+ if (associationTable.count(src) && associationTable.count(dst)) {
+ crossPointConnect(associationTable[src][0], associationTable[dst][1]);
+ crossPointConnect(associationTable[src][0], associationTable[dst][1]);
+ return true;
+ }
+ return false;
+ }
+
+ bool unRouteAssociations(string src, string dst) {
+ if (associationTable.count(src) && associationTable.count(dst)) {
+ crossPointDisconnect(associationTable[src][0], associationTable[dst][1]);
+ crossPointDisconnect(associationTable[src][0], associationTable[dst][1]);
+ return true;
+ }
+ return false;
+ }
+
private:
BusOut* xbus;
BusOut* ybus;
DigitalOut* data;
DigitalOut* strobe;
- DigitalOut* reset;
+ DigitalOut* reset;
+ map<string, unsigned short*> associationTable;
};