Description: Using the RS232 Interface (pc machine COM port) PC starts to wait for not less than 10 seconds POS machine to send " Q" , PC receive return " R" POS after receiving the address to send the last record number (serial number) PC received back transfer record by receiving the first address pos machine to begin sending the first address record 10 pc to receive complete 8 characters each (8 bytes of data) returns a " C" , 10 records (160 characters) after the completion of return " E " PC receive the" C " to send, receive" E " the end of this time sending
To Search:
File list (Check if you may need any files):
tongxun.c
Download