#include <regex.h>
#define READ_TIMEOUT 2 // 2 seconds for ReadChar
+#define TRACE_COKE 1
// === IMPORTS ===
if( giCoke_SerialFD == -1 )
return -2;
+ #if TRACE_COKE
+ printf("Coke_CanDispense: Flushing");
+ #endif
+
// Flush the input buffer
{
char tmpbuf[512];
// Wait for a prompt
ret = 0;
do {
+ #if TRACE_COKE
+ printf("Coke_DoDispense: sending 'd7'");
+ #endif
write(giCoke_SerialFD, "d7\r\n", 4);
} while( WaitForColon() && ret++ < 3 );
// TODO: Handle "not ok" response to D7
+ #if TRACE_COKE
+ printf("Coke_CanDispense: sending 's%i'", Item);
+ #endif
+
// Ask the coke machine
sprintf(tmp, "s%i\r\n", Item);
write(giCoke_SerialFD, tmp, 4);
+ #if TRACE_COKE
+ printf("Coke_CanDispense: reading response");
+ #endif
// Read from the machine (ignoring empty lines)
while( (ret = ReadLine(sizeof(tmp)-1, tmp)) == 0 );
printf("ret = %i, tmp = '%s'\n", ret, tmp);
}
return -1;
}
+
+ #if TRACE_COKE
+ printf("Coke_CanDispense: wait for the prompt again");
+ #endif
// Eat rest of response
WaitForColon();
status = &tmp[ matches[3].rm_so ];
printf("Machine responded slot status '%s'\n", status);
+
+ #if TRACE_COKE
+ printf("Coke_CanDispense: done");
+ #endif
if( strcmp(status, "full") == 0 )
return 0;
if( giCoke_SerialFD == -1 )
return -2;
+ #if TRACE_COKE
+ printf("Coke_DoDispense: flushing input");
+ #endif
// Flush the input buffer
{
char tmpbuf[512];
read(giCoke_SerialFD, tmpbuf, sizeof(tmpbuf));
}
-
+
// Wait for prompt
i = 0;
do {
+ #if TRACE_COKE
+ printf("Coke_DoDispense: sending 'd7'");
+ #endif
write(Item, "d7\r\n", 4);
} while( WaitForColon() && i++ < 3 );
+ #if TRACE_COKE
+ printf("Coke_DoDispense: sending 'd%i'", Item);
+ #endif
// Dispense
sprintf(tmp, "d%i\r\n", Item);
write(giCoke_SerialFD, tmp, 4);
if( ret == -1 ) return -1;
WaitForColon(); // Eat up rest of response
+
+ #if TRACE_COKE
+ printf("Coke_DoDispense: done");
+ #endif
// TODO: Regex
if( strcmp(tmp, "ok") == 0 ) {