Implement the PED State Change callback
Implement the ped_state_change_CB callback and assign to the function pointer device_state_update_CB. For more information on how to do this, see Implement callbacks with register_device_request.
Code example
The declaration of the PED State Change callback is:
void ped_state_change_CB(void * ped_dev, ped_device_info *, void * echo_struct);Invoke
This is invoked automatically by a change in PED state.
Handle the PED State Change callback
The ped_state_change_CB callback is returned when the PED state is changed and allows you to process this change, if it is required by the business logic of your application. Create this function and assign to the function pointer device_state_update_CB.
Parameters
| Field | Description |
|---|---|
ped_dev |
Pointer to an internal PED object. This parameter is for internal use only, instead use terminal_id to get access to the PED. |
ped_device_info |
Pointer to the ped_device_info struct in the POS. Use this parameter to get information about the current PED state. |
echo_struct |
Pointer to a POS defined struct. Returned in the callback. Use this parameter to share a POS data struct between the call to the library and the associated callback from the library. |
PED States
| State | Description |
|---|---|
ped_state_undetected | Incorrect IP, cannot detect the PED. This is a final state. |
ped_state_detected | PED detected, correct serial/IP address. |
ped_state_identified | Valid PED. |
ped_state_registered | PED is registered, final result on RegisterPED. |
ped_state_config_synced | PED is has synchronized its configuration. |
ped_state_wait_reboot_ready | PED is rebooting. |
ped_state_wait_ready_for_transaction | PED must complete another process before it is ready to create a transaction. |
ped_state_not_ready | PED is busy. This is a final state. |
ped_state_ready_for_transaction | PED is ready for transaction. |
ped_state_tender | PED is busy with a tender. |