Fixing serial handling

[tpg/opendispense2.git] / src / server / handler_coke.c

diff --git a/src/server/handler_coke.c b/src/server/handler_coke.c
index 978e3f5..53cbd0f 100644 (file)
--- a/src/server/handler_coke.c
+++ b/src/server/handler_coke.c
@@ -37,11 +37,14 @@ regex_t     gCoke_StatusRegex;
 int Coke_InitHandler()
 {
        printf("connecting to coke machine...\n");
-       giCoke_SerialFD = open(gsCoke_SerialPort, O_RDWR);
+       giCoke_SerialFD = open(gsCoke_SerialPort, O_RDWR | O_NOCTTY | O_NONBLOCK);
        if( giCoke_SerialFD == -1 ) {
                fprintf(stderr, "ERROR: Unable to open coke serial port ('%s')\n", gsCoke_SerialPort);
        }
-       regcomp(&gCoke_StatusRegex, "^slot\\s+(\\d)\\s+([^:]+):([a-zA-Z]+)\\s*", REG_EXTENDED);
+       
+       InitSerial(giCoke_SerialFD, 9600);
+       
+       CompileRegex(&gCoke_StatusRegex, "^slot\\s+(\\d)\\s+([^:]+):([a-zA-Z]+)\\s*", REG_EXTENDED);
        return 0;
 }
 
@@ -49,17 +52,27 @@ int Coke_CanDispense(int User, int Item)
 {
        char    tmp[32], *status;
        regmatch_t      matches[4];
+        int    ret;
 
        // Sanity please
-       if( Item < 0 || Item > 6 )      return -1;
+       if( Item < 0 || Item > 6 )      return -1;      // -EYOURBAD
        
        // Ask the coke machine
        sprintf(tmp, "s%i\n", Item);
        write(giCoke_SerialFD, tmp, 2);
 
        // Read the response
-       read(giCoke_SerialFD, tmp, sizeof(tmp)-1);
-       regexec(&gCoke_StatusRegex, tmp, sizeof(matches)/sizeof(matches[0]), matches, 0);
+       tmp[0] = '\0';
+       ret = read(giCoke_SerialFD, tmp, sizeof(tmp)-1);
+       //printf("ret = %i\n", ret);
+       if( ret <= 0 ) {
+               fprintf(stderr, "Coke machine is not being chatty (read = %i)\n", ret);
+               return -1;
+       }
+       ret = RunRegex(&gCoke_StatusRegex, tmp, sizeof(matches)/sizeof(matches[0]), matches, "Bad Response");
+       if( ret ) {
+               return -1;
+       }
 
        tmp[ matches[3].rm_eo ] = '\0';
        status = &tmp[ matches[3].rm_so ];
@@ -67,9 +80,9 @@ int Coke_CanDispense(int User, int Item)
        printf("Machine responded slot status '%s'\n", status);
 
        if( strcmp(status, "full") == 0 )
-               return 1;
+               return 0;
 
-       return 0;
+       return 1;
 }
 
 /**