4.4 Data encoding for ADC hits

data, that is, the packet-data payload, depends on ndigo6g12_configuration::output_mode. The length of the data array is encoded in length. Be aware that length is in multiples of 64 bit, while the size of the fields of data depends on type.

Thus, reading packet data requires the following steps:

• Depending on type, multiply length appropriately. E.g., if type is CRONO_PACKET_TYPE_16_BIT_SIGNED, length has to be multiplied by 4 (since 4 \(\times\) 16 bit = 64 bit).

• Cast data according to type. E.g., if type is CRONO_PACKET_TYPE_16_BIT_SIGNED, cast data to int16_t.

4.4.1 NDIGO6G12_OUTPUT_MODE_SIGNED16

Raw data of the ADC is mapped to the range of a signed16 integer (−32768 to 32767). Packet data is of type CRONO_PACKET_TYPE_16_BIT_SIGNED and must be cast to int16_t.

4.4.2 NDIGO6G12_OUTPUT_MODE_SIGNED32

Only used if ndigo6g12_init_parameters::application_type is NDIGO6G12_APP_TYPE_AVRG.

Raw data of the ADC is mapped to the range of a signed32 integer (−2³¹ to 2³¹ −1). Packet data is of type CRONO_PACKET_TYPE_32_BIT_SIGNED and must be cast to int32_t.

4.4.3 NDIGO6G12_OUTPUT_MODE_RAW

Packet data is returned in the native range of the ADC (0 to 4095) and as type CRONO_PACKET_TYPE_16_BIT_SIGNED. It must be cast to int16_t.

Data layout:

Bit	15	14	13	12	11	10	…	0
Data	0	0	control bits		sample data

Attention

NDIGO6G12_OUTPUT_MODE_RAW is useful for debugging purposes. It is not supported for user applications. Use NDIGO6G12_OUTPUT_MODE_SIGNED16 instead.