4.3 Data encoding for ADC hits

crono_packet::data, that is, the packet-data payload, depends on ndigo6g12_configuration::output_mode. The length of the data array is encoded in crono_packet::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 crono_packet::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.

4.3.1 NDIGO6G12_OUTPUT_MODE_SIGNED16

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

4.3.2 NDIGO6G12_OUTPUT_MODE_RAW

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

Data layout:

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

4.3.3 NDIGO6G12_OUTPUT_MODE_RAW_NO_CB

Packet data is returned in the native range of the ADC (0 to 4095). It must be cast to int16_t. Unlike NDIGO6G12_OUTPUT_MODE_RAW, it does not contain control bits.

Attention

NDIGO6G12_OUTPUT_MODE_RAW and NDIGO6G12_OUTPUT_MODE_RAW_NO_CB are useful for debugging purposes. They are not supported for user applications. Use NDIGO6G12_OUTPUT_MODE_SIGNED16 instead.

4.3.4 NDIGO6G12_OUTPUT_MODE_SIGNED32

Only used if ndigo6g12_init_parameters::application_type is NDIGO6G12_APP_TYPE_AVRG. See Section 4.5 for more information.