Atmel AT43DK370, User Manual

Page: 23 / 57

USB Clinic
AT43DK370 USB Host/Function Dev. Kit User Guide 4-9
3423C–USB–1/04
4.7.5 Control Transfer The Control command performs transfers to the control endpoint of the device. The
user has to enter the Device Address of the device, the Control Endpoint, the least sig-
nificant 4 bytes of the 8-byte setup data in the Setup Hi field, the most significant 4 bytes
of the 8-byte setup data in Setup Lo field, the Data Stage field, and the Buffer Size allo-
cated for this operation. For more information using this command, please refer to the
section “ControlTransfer() API” in the “AT43USB370 Software Development Guide for
Host Mode”.
4.7.6 Custom Transfer The Custom Transfer command allows users to customize their own transfer type. It
supports all transfer types endpoints (Isochronous, Interrupt, Bulk and Control). The
user has to enter the Device Address of the device, the Endpoint intended, the Packet
Type (see Table 4-3), Data Toggle (see Table 4-4), the number of Retries allowed, the
number of NAKs allowed, the ISO Packet Size if ISO endpoint is used, and the Buffer
Size allocated for this operation. For more details on how to use the Custom Transfer
command, please refer to the section “USBP_H_CustomTransfer() API” of the
“AT43USB370 Software Development Guide for Host Mode”.
Table 4-2. Data Stage
Data Stage Value Description
DATA_STAGE_NULL 0x00 Setup stage will be followed by the status stage.
DATA_STAGE_IN
0x01 Data stage following the setup stage will be in the IN
direction. The data will be received from the device.
DATA_STAGE_OUT
0x02 Data stage following the setup stage will be in the OUT
direction. The data will be sent to the device.
Table 4-3. Packet Types
Packet Type Value
PACKET_OUT 0x00
PACKET_IN 0x01
PACKET_SETUP 0x02
Table 4-4. Data Toggle
Data Toggle Value
DATA_TOGGLE_0 0x00
DATA_TOGGLE_1 0x01