Dfu_Dnload Request Commands - ST STM32F105 Series Application Note

DFU bootloader
Note: Before issuing an Upload request, the host has to check that the device is in a correct state
(dfuIDLE or dfuUPLOAD-IDLE state) and that there is no error reported in the status. If the
Device is not in the required state/status, the Host has to clear any error (DFU_CLRSTATUS
request) and get the new status till the Device returns to dfuIDLE state.
4.5

DFU_DNLOAD request commands

The download request allows to perform different commands. The command selection is
done through the value of
are supported:
●
Write Memory (
● Set Address Pointer (
●
Erase (
●
Read Unprotect (
●
Leave DFU (leave DFU mode and Jump to application)
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parameter wValue in the USB request structure. The following operations
> 1)
wValue
wValue
= 0 and First Byte = 0x41)
wValue
= 0 and First Byte = 0x92)
wValue
Doc ID 14156 Rev 1
= 0 and First Byte = 0x21)
AN2662