User manual

NXP Semiconductors
UM10663
NXP Reader Library User Manual
UM10663
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User Manual
COMPANY PUBLIC
Rev. 1.2 — 24 July 2013
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PH_ERR_SUCCESS operation successful.
PH_ERR_INTERFACE_ERROR communication error.
2.2.9 FieldReset - phhalHw_FieldReset()
This function performs reset of the RF field. Firstly the RF field is turned off by FieldOff()
(see section 2.2.8) function and subsequently the RF field is enabled by
FieldOn() (see
section 2.2.7) function. Both those states are hold for a certain amount of time while
doing nothing else.
phStatus_t phhalHw_FieldReset(
void * pDataParams ); [In]
*pDataParams: pointer to the HAL layer data parameter structure. HAL structure
parameters
pDataParams->wFieldOffTime and pDataParams->wFieldRecoveryTime determine
how long (in milliseconds)
FieldOff() and FieldOn() functions hold their field states.
Default value for both the timeouts is 5 milliseconds. Whilst field off and field recovery
times can be changed by
phhalHw_SetConfig() function individually, units are
unchangeable (milliseconds are fixed).
returnValues:
PH_ERR_SUCCESS operation successful.
PH_ERR_INTERFACE_ERROR communication error.
2.2.10 Wait - phhalHw_Wait()
This function utilizes reader chip timers T0 and T1 to hold program flow for a given
amount of time. Program leaves this function when timeout elapses.
phStatus_t phhalHw_Wait(
void * pDataParams, [In]
uint8_t bUnit, [In]
uint16_t wTimeout ); [In]
*pDataParams: pointer to the HAL layer data parameter structure.
bUnit: unit of given timeout value. Either
PHHAL_HW_TIME_MICROSECONDS or
PHHAL_HW_TIME_MILLISECONDS .
wTimeout: timeout value.
returnValue:
PH_ERR_SUCCESS operation successful.
PH_ERR_INVALID_PARAMETER bUnit is invalid.
PH_ERR_INTERFACE_ERROR communication error.