*
* This file is licenced under the 3-clause BSD Licence. See the file
* COPYING for full details.
+ *
+ * NOTES:
+ * - Remember, the coke machine echoes your text back to you!
*/
#include "common.h"
#include <stdio.h>
fprintf(stderr, "ERROR: Unable to open coke serial port ('%s')\n", gsCoke_SerialPort);
}
- CompileRegex(&gCoke_StatusRegex, "^slot\\s+(\\d)\\s+([^:]+):([a-zA-Z]+)\\s*", REG_EXTENDED);
+ CompileRegex(&gCoke_StatusRegex, "^slot\\s+([0-9]+)\\s+([^:]+):([a-zA-Z]+)\\s*", REG_EXTENDED);
return 0;
}
-int Coke_CanDispense(int User, int Item)
+int Coke_CanDispense(int UNUSED(User), int Item)
{
- char tmp[32], *status;
+ char tmp[40], *status;
regmatch_t matches[4];
int ret;
// Sanity please
if( Item < 0 || Item > 6 ) return -1; // -EYOURBAD
+ // Can't dispense if the machine is not connected
+ if( giCoke_SerialFD == -1 )
+ return -2;
+
+ // Wait for a prompt
ret = 0;
do {
write(giCoke_SerialFD, "d7\r\n", 4);
sprintf(tmp, "s%i\r\n", Item);
write(giCoke_SerialFD, tmp, 4);
- ret = ReadLine(sizeof(tmp)-1, tmp);
- printf("ret = %i, tmp = '%s'\n", ret, tmp);
-// if( !ret )
-// ret = ReadLine(sizeof(tmp)-1, tmp);
+ // Read from the machine (ignoring empty lines)
+ while( (ret = ReadLine(sizeof(tmp)-1, tmp)) == 0 );
printf("ret = %i, tmp = '%s'\n", ret, tmp);
+ if( tmp[0] == ':' ) {
+ ret = ReadLine(sizeof(tmp)-1, tmp);
+ printf("ret = %i, tmp = '%s'\n", ret, tmp);
+ }
// Catch an error
if( ret <= 0 ) {
return -1;
}
+ // Eat rest of response
+ WaitForColon();
+
// Parse status response
ret = RunRegex(&gCoke_StatusRegex, tmp, sizeof(matches)/sizeof(matches[0]), matches, "Bad Response");
if( ret ) {
/**
* \brief Actually do a dispense from the coke machine
*/
-int Coke_DoDispense(int User, int Item)
+int Coke_DoDispense(int UNUSED(User), int Item)
{
- char tmp[32], *status;
- regmatch_t matches[4];
+ char tmp[32];
+ int i, ret;
// Sanity please
if( Item < 0 || Item > 6 ) return -1;
- WaitForColon();
+ // Can't dispense if the machine is not connected
+ if( giCoke_SerialFD == -1 )
+ return -2;
+
+ // Wait for prompt
+ i = 0;
+ do {
+ write(Item, "d7\r\n", 4);
+ } while( WaitForColon() && i++ < 3 );
// Dispense
sprintf(tmp, "d%i\r\n", Item);
write(giCoke_SerialFD, tmp, 4);
- WaitForColon();
-
+ // Read empty lines
+ while( (ret = ReadLine(sizeof(tmp)-1, tmp)) == -1 );
+ if( ret == -1 ) return -1;
+ // Read d%i
+ while( tmp[0] == ':' ) {
+ ret = ReadLine(sizeof(tmp)-1, tmp);
+ if( ret == -1 ) return -1;
+ }
// Get status
- ReadLine(sizeof(tmp)-1, tmp);
-
- tmp[ matches[3].rm_eo ] = '\0';
- status = &tmp[ matches[3].rm_so ];
+ ret = ReadLine(sizeof(tmp)-1, tmp);
+ if( ret == -1 ) return -1;
- printf("Machine responded slot status '%s'\n", status);
+ WaitForColon(); // Eat up rest of response
- return 0;
+ // TODO: Regex
+ if( strcmp(tmp, "ok") == 0 ) {
+ // We think dispense worked
+ // - The machine returns 'ok' if an empty slot is dispensed, even if
+ // it doesn't actually try to dispense (no sound)
+ return 0;
+ }
+
+ printf("Machine returned unknown value '%s'\n", tmp);
+
+ return -1;
}
char ReadChar()
{
char ch;
int i = 0;
- int ret = 0;
for(;;)
{