CD22M3494.h

00001 #ifndef CD22M3494_H
00002 #define CD22M3494_H
00003 
00004 #include <mbed.h>
00005 #include <map>
00006 #include <string>
00007 
00008 #define LOG_LEVEL_INFO
00009 #include "logger.h"
00010 
00011 /*
00012 X ADDRESS 
00013 AX3 AX2 AX1 AX0 X SWITCH 
00014  0   0   0   0    X0
00015  0   0   0   1    X1
00016  0   0   1   0    X2
00017  0   0   1   1    X3
00018  0   1   0   0    X4
00019  0   1   0   1    X5
00020  0   1   1   0    X12
00021  0   1   1   1    X13
00022  1   0   0   0    X6
00023  1   0   0   1    X7
00024  1   0   1   0    X8
00025  1   0   1   1    X9
00026  1   1   0   0    X10
00027  1   1   0   1    X11
00028  1   1   1   0    X14
00029  1   1   1   1    X15
00030 */
00031 #define X0 "X0"
00032 #define X1 "X1"
00033 #define X2 "X2"
00034 #define X3 "X3"
00035 #define X4 "X4"
00036 #define X5 "X5"
00037 #define X6 "X6"
00038 #define X7 "X7"
00039 #define X8 "X8"
00040 #define X9 "X9"
00041 #define X10 "X10"
00042 #define X11 "X11"
00043 #define X12 "X12"
00044 #define X13 "X13"
00045 #define X14 "X14"
00046 #define X15 "X15"
00047 
00048 
00049 #define X0I 0x00
00050 #define X1I 0x01
00051 #define X2I 0x02
00052 #define X3I 0x03
00053 #define X4I 0x04
00054 #define X5I 0x05
00055 #define X12I 0x06
00056 #define X13I 0x07
00057 #define X6I 0x08
00058 #define X7I 0x09
00059 #define X8I 0x0A
00060 #define X9I 0x0B
00061 #define X10I 0x0C
00062 #define X11I 0x0D
00063 #define X14I 0x0E
00064 #define X15I 0x0F
00065 
00066 /*
00067 Y ADDRESS
00068 AY2 AY1 AY0 Y SWITCH
00069  0   0   0    Y0
00070  0   0   1    Y1
00071  0   1   0    Y2
00072  0   1   1    Y3
00073  1   0   0    Y4
00074  1   0   1    Y5
00075  1   1   0    Y6
00076  1   1   1    Y7
00077 */
00078 
00079 #define Y0I 0x00
00080 #define Y1I 0x01
00081 #define Y2I 0x02
00082 #define Y3I 0x03
00083 #define Y4I 0x04
00084 #define Y5I 0x05
00085 #define Y6I 0x06
00086 #define Y7I 0x07
00087 
00088 #define Y0 "Y0"
00089 #define Y1 "Y1"
00090 #define Y2 "Y2"
00091 #define Y3 "Y3"
00092 #define Y4 "Y4"
00093 #define Y5 "Y5"
00094 #define Y6 "Y6"
00095 #define Y7 "Y7"
00096 
00097 #define MAX_X 0x0F
00098 #define MAX_Y 0x07
00099 
00100 struct Association {
00101     string name;
00102     string xp1;
00103     string xp2;
00104 };
00105     
00106 /**A driver for the CD22M3494 crosspoint switch matrix.
00107  */
00108 class CD22M3494 {
00109 
00110 public:
00111 
00112     /**Constructs a new CD22M3494 object
00113      *
00114      * @param x0 the pin name for the first bit of the x axis address
00115      * @param x1 the pin name for the second bit of the x axis address
00116      * @param x2 the pin name for the thrid bit of the x axis address
00117      * @param x3 the pin name for the forth bit of the x axis address
00118      * @param y0 the pin name for the first bit of the y axis address
00119      * @param y1 the pin name for the second bit of the y axis address
00120      * @param y2 the pin name for the thrid bit of the y axis address
00121      * @param d the pin name for the data bus
00122      * @param str the pin name for the strobe bus
00123      * @param rs the pin name for reset.
00124      */
00125     CD22M3494(PinName x0, PinName x1, PinName x2, PinName x3, PinName y0, PinName y1, PinName y2, PinName d, PinName str, PinName rs) {
00126         xbus = new BusOut(x0, x1, x2, x3);
00127         ybus = new BusOut(y0, y1, y2);
00128         data = new DigitalOut(d);
00129         strobe = new DigitalOut(str);
00130         reset = new DigitalOut(rs);
00131         data->write(0);
00132         strobe->write(0);
00133         reset->write(0);
00134         crosspointLookup[X0] = X0I;
00135         crosspointLookup[X1] = X1I;
00136         crosspointLookup[X2] = X2I;
00137         crosspointLookup[X3] = X3I;
00138         crosspointLookup[X4] = X4I;
00139         crosspointLookup[X5] = X5I;
00140         crosspointLookup[X6] = X6I;
00141         crosspointLookup[X7] = X7I;
00142         crosspointLookup[X8] = X8I;
00143         crosspointLookup[X9] = X9I;
00144         crosspointLookup[X10] = X10I;
00145         crosspointLookup[X11] = X11I;
00146         crosspointLookup[X12] = X12I;
00147         crosspointLookup[X13] = X13I;
00148         crosspointLookup[X14] = X14I;
00149         crosspointLookup[X15] = X15I;
00150         crosspointLookup[Y0] = Y0I;
00151         crosspointLookup[Y1] = Y1I;
00152         crosspointLookup[Y2] = Y2I;
00153         crosspointLookup[Y3] = Y3I;
00154         crosspointLookup[Y4] = Y4I;
00155         crosspointLookup[Y5] = Y5I;
00156         crosspointLookup[Y6] = Y6I;
00157         crosspointLookup[Y7] = Y7I;
00158     }
00159     
00160     ~CD22M3494() {
00161         delete xbus;
00162         delete ybus;
00163         delete data;
00164         delete strobe;
00165         delete reset;
00166         associationTable.clear();
00167         delete &associationTable;
00168     }  
00169 
00170     /**Closes the switch at the given cross point.
00171      *
00172      * @param x the x axis
00173      * @param y the y axis
00174      */
00175     bool crossPointConnect(unsigned short x, unsigned short y) {
00176         INFO("Got x point connect for x %d, y %d", x, y);
00177         if (x <= MAX_X && y <= MAX_Y) {
00178             INFO("setting data high...");
00179             data->write(1);
00180             INFO("writing x...");
00181             xbus->write(x);
00182             INFO("writing y...");
00183             ybus->write(y);
00184             // let the data busses settle before setting obe high
00185             wait_us(2);
00186             strobe->write(1);
00187             // obe must be high for at least 20 ns
00188             wait_us(1);
00189             strobe->write(0); 
00190             INFO("Done");
00191             return true; 
00192         }
00193         INFO("Error");
00194         return false;
00195     }
00196 
00197     /**Opens the switch at the given cross point.
00198      *
00199      * @param x the x axis
00200      * @param y the y axis
00201      */
00202     bool crossPointDisconnect(unsigned short x, unsigned short y) {
00203         INFO("Got x point disconnect for x %d, y %d", x, y);
00204         if (x <= MAX_X && y <= MAX_Y) {
00205             INFO("setting data high...");
00206             data->write(0);
00207             INFO("writing x...");
00208             xbus->write(x);
00209             INFO("writing y...");
00210             ybus->write(y);
00211             // let the data busses settle before setting obe high
00212             wait_us(2);
00213             strobe->write(1);
00214             // obe must be high for at least 20 ns
00215             wait_us(1);
00216             strobe->write(0);
00217             INFO("Done");
00218             return true;        
00219         }
00220         INFO("Error");
00221         return false;
00222     }
00223     
00224     /**Associated the two given crosspoint with the given name, note, both crosspoint MUST be on the same axis.
00225      *
00226      * @param name the name of the association
00227      * @param xp1 the first crosspoint to associate with the given name
00228      * @param xp2 the second crosspoint to associate with the given name
00229      */
00230     bool associate(string name, string xp1, string xp2) {
00231         if (crosspointLookup.count(xp1) && crosspointLookup.count(xp2)) {
00232             Association *assoc = new Association();
00233             assoc->xp1 = xp1;
00234             assoc->xp2 = xp2;
00235             associationTable[name] = assoc;
00236             return true;
00237         }
00238         return false;
00239     }
00240     
00241     /**Connects all the crosspoints for the given associations.
00242      * 
00243      * @param src the source association
00244      * @param dst the destination to connect the source to.
00245      */
00246     bool routeAssociations(string src, string dst) {
00247         if (associationTable.count(src) && associationTable.count(dst)) {
00248             crossPointConnect(crosspointLookup[associationTable[src]->xp1], crosspointLookup[associationTable[dst]->xp1]);
00249             crossPointConnect(crosspointLookup[associationTable[src]->xp2], crosspointLookup[associationTable[dst]->xp2]);
00250             return true;
00251         }
00252         return false;    
00253     }
00254     
00255     /**Disconnects all the crosspoints for the given associations.
00256      * 
00257      * @param src the source association
00258      * @param dst the destination to disconnect from the source.
00259      */
00260     bool unRouteAssociations(string src, string dst) {
00261         if (associationTable.count(src) && associationTable.count(dst)) {
00262             crossPointDisconnect(crosspointLookup[associationTable[src]->xp1], crosspointLookup[associationTable[dst]->xp1]);
00263             crossPointDisconnect(crosspointLookup[associationTable[src]->xp2], crosspointLookup[associationTable[dst]->xp2]);
00264             return true;
00265         }
00266         return false;            
00267     }
00268     
00269     Association* getAssociation(string name) {
00270         return associationTable[name];
00271     }
00272             
00273 private:
00274     BusOut *xbus;
00275     BusOut *ybus;
00276     DigitalOut *data;
00277     DigitalOut *strobe;
00278     DigitalOut *reset;    
00279     map<string, Association*> associationTable;
00280     map<string, unsigned short> crosspointLookup; 
00281 };
00282 
00283 
00284 #endif