SAM DCC Sampler

Used to read out data from DCC0 on a SAMD or SAML device. User code running on the device can write characters to DCC0 to implement printf functionality. The debugger polls this location and forwards data received to the host computer.

Table 1. SAM DCC Sampler
Field	Size	Description
DATA_SAMPLER	1 byte	0x8A
SAMPLE_DCC	1 byte	0x05
ENABLE	1 byte	0x00: disable 0x01: enable
ADDRESS	4 byte	Start address of DSU module (containing DCC), MSB first
FLAGS	4 byte	Bits 1:0: destination: b00: send to DGI as data b01: send to HID (reserved) b10: send to DGI as print b11: reserved

Response:

Table 2. SAM DCC Sampler Response
Field	Size	Description
DATA_SAMPLER	1 byte	0x8A
SAMPLE_DCC	1 byte	0x05
Status	1 byte	Status code 0x00: OK 0xFF: Error

Note: This feature is in a beta stage and should be used with caution.