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UM0290 Datasheet(PDF) 35 Page - STMicroelectronics

Part # UM0290
Description  This document presents a description
PDF  76 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0290 Datasheet(HTML) 35 Page - STMicroelectronics

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UM0290
Device firmware upgrade
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4.5.3
DFU state diagram
Figure 6 summarizes the DFU interface states and the transitions between them. The
events that rigger state transitions can be thought of as arriving on multiple “input tapes” as
in the classic Turing machine concept.
Figure 6.
Interface state transition diagram
Note:
The state transition diagram shown in Figure 6 is almost the same as that defined in the
DFU Class specification (Fig A1 page 28), with the exception of the new transition from state
2 to state 6, which is additional and may or not be implemented in the device firmware.
DFU_DNLOAD
(wLength > 0,
bitCanDnload = 1)
Status Poll Timeout
DFU_GETSTATUS
& Manifest complete
& BitManifestationTolerant=1
Status Poll Timeout,
bitManfestationTolerant = 1
DFU_DNLOAD
EST-SYNC
DFU_DNLOAD
( wLength > 0 )
DFU_GETSTATUS
Status Poll Timeout,
State
DFU_GETSTATUS
DFU_GETSTATE
State
25,9,
10,11
2,3,5,6
9,10
Re-enumeration
DFU_ABORT
Corrupt Firmware
DFU_CLRSTATUS
Any state
(except
0 or 1)
MCU reset
2
dfuIDLE
3
BUSY
dfuDNLOAD
SYNC
dfuDN
10
dfuERROR
state
2,3,5,6,9
4
DFU_GETSTATUS
& Block complete
5
dfuDNLO
AD-IDLE
DFU_DNLOAD
wLength=0
9
DFU_UPLOAD
- SYNC
DFU_UPLOAD
DFU_UPLOAD
(short Frame)
dfuUPLOAD
6
dfuMANIF
DFU_GETSTATUS
(Manifest in progress)
dfuMANIF
7
8
EST
dfuMANIF
EST-WAIT
RESET
ERROR
app
DETACH
MCU Reset
+ USB Reset
+ DFU mode
selected
1
appIDLE
0
DFU_DETACH
Detach timeout
Application Program Mode
BitManifestationTolerant=0
wLength=0
ai14099



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