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https://bitbucket.org/librepilot/librepilot.git
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47c36b3da0
The transition from the ADDR state to the read state was broken for non-final reads. The FSM diagram was also wrong for this transition. Since reads are always the last transaction in a sequence in our current usage, this doesn't actually fix any known bugs. git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1350 ebee16cc-31ac-478f-84a7-5cbb03baadba
173 lines
5.2 KiB
Plaintext
173 lines
5.2 KiB
Plaintext
// Regenerate using graphviz/dotty with this command
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// dot -Tjpg ./flight/Doc/Architecture/stm32_i2c_fsm.dot > ./flight/Doc/Architecture/stm32_i2c_fsm.jpg
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digraph stm32_i2c_fsm {
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label="STM32 I2C FSM"
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labelloc=t
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labeljust = l
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{
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node [ style=filled,color=lightgray ]
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stopped [ shape="doublecircle" ]
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}
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node [ style=filled,color=blue ]
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{
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rank=same
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stopped
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stopping
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starting
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}
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// start addr/w[A] data[A] stop
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// SB ADDR BTF
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// ADDR DR
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// STOP
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//
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// start addr/w[A] data[A] data[A] stop
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// SB ADDR BTF BTF
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// ADDR DR DR
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// STOP
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//
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// start addr/w[A] data[A] data[A] data[A] stop
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// SB ADDR BTF BTF BTF
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// ADDR DR DR DR
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// STOP
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//
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subgraph cluster_w_last_txn {
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label="Final Write Txn"
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w_last_txn_addr
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w_last_txn_middle
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w_last_txn_last
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}
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// start addr/w[A] data[A] start
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// SB ADDR BTF
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// ADDR DR
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// START
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//
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// start addr/w[A] data[A] data[A] start
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// SB ADDR BTF BTF
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// ADDR DR DR
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// START
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//
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// start addr/w[A] data[A] data[A] data[A] stop
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// SB ADDR BTF BTF BTF
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// ADDR DR DR DR
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// START
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//
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subgraph cluster_w_more_txn {
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label="Write Txn with Restart"
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w_more_txn_addr
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w_more_txn_middle
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w_more_txn_last
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}
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// start addr/r[A] [data] N stop
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// SB ADDR RXNE
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// ADDR STOP DR
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// NAK
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//
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// start addr/r[A] [data] A [data] N stop
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// SB ADDR RXNE RXNE
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// ADDR DR DR
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// ACK NAK
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// STOP
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//
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// start addr/r[A] [data] A [data] A [data] N stop
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// SB ADDR RXNE RXNE RXNE
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// ADDR DR DR DR
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// ACK ACK NAK
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// STOP
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//
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subgraph cluster_r_last_txn {
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label="Final Read Txn"
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r_last_txn_addr
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r_last_txn_pre_one
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r_last_txn_pre_first
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r_last_txn_pre_middle
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r_last_txn_pre_last
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r_last_txn_post_last
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}
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// start addr/r[A] [data] N start
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// SB ADDR RXNE
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// ADDR START DR
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// NAK
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//
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// start addr/r[A] [data] A [data] N start
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// SB ADDR RXNE RXNE
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// ADDR DR DR
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// ACK NAK
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// START
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//
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// start addr/r[A] [data] A [data] A [data] N start
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// SB ADDR RXNE RXNE RXNE
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// ADDR DR DR DR
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// ACK ACK NAK
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// START
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subgraph cluster_r_more_txn {
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label="Read Txn with Restart"
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r_more_txn_addr
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r_more_txn_pre_one
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r_more_txn_pre_first
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r_more_txn_pre_middle
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r_more_txn_pre_last
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r_more_txn_post_last
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}
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stopping -> stopped [ label="auto" ]
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stopped -> starting [ label="start" ]
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starting -> w_last_txn_addr [ label="SB\nop=write\nlast txn" ]
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starting -> w_more_txn_addr [ label="SB\nop=write\nmore txn" ]
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starting -> r_last_txn_addr [ label="SB\nop=read\nlast txn" ]
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starting -> r_more_txn_addr [ label="SB\nop=read\nmore txn" ]
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w_last_txn_addr -> w_last_txn_last [ label="ADDR\nlen==1" ]
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w_more_txn_addr -> w_more_txn_last [ label="ADDR\nlen==1" ]
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w_last_txn_addr -> w_last_txn_middle [ label="ADDR\nlen>1" ]
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w_more_txn_addr -> w_more_txn_middle [ label="ADDR\nlen>1" ]
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w_last_txn_middle -> w_last_txn_middle [ label="BTF\nlen>1" ]
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w_more_txn_middle -> w_more_txn_middle [ label="BTF\nlen>1" ]
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w_last_txn_middle -> w_last_txn_last [ label="BTF\nlen==1" ]
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w_more_txn_middle -> w_more_txn_last [ label="BTF\nlen==1" ]
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w_last_txn_last -> stopped [ label="BTF\nlen==0" ]
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w_more_txn_last -> starting [ label="BTF\nlen==0" ]
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r_last_txn_addr -> r_last_txn_pre_one [ label="ADDR\nlen==1" ]
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r_more_txn_addr -> r_more_txn_pre_one [ label="ADDR\nlen==1" ]
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r_last_txn_addr -> r_last_txn_pre_first [ label="ADDR\nlen>=2" ]
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r_more_txn_addr -> r_more_txn_pre_first [ label="ADDR\nlen>=2" ]
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r_last_txn_pre_one -> r_last_txn_post_last [ label="BTF\nlen==1" ]
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r_more_txn_pre_one -> r_more_txn_post_last [ label="BTF\nlen==1" ]
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r_last_txn_pre_first -> r_last_txn_pre_last [ label="BTF\nlen==2" ]
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r_more_txn_pre_first -> r_more_txn_pre_last [ label="BTF\nlen==2" ]
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r_last_txn_pre_first -> r_last_txn_pre_middle [ label="BTF\nlen>2" ]
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r_more_txn_pre_first -> r_more_txn_pre_middle [ label="BTF\nlen>2" ]
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r_last_txn_pre_middle -> r_last_txn_pre_middle [ label="BTF\nlen>2" ]
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r_more_txn_pre_middle -> r_more_txn_pre_middle [ label="BTF\nlen>2" ]
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r_last_txn_pre_middle -> r_last_txn_pre_last [ label="BTF\nlen==2" ]
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r_more_txn_pre_middle -> r_more_txn_pre_last [ label="BTF\nlen==2" ]
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r_last_txn_pre_last -> r_last_txn_post_last [ label="BTF\nlen==1" ]
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r_more_txn_pre_last -> r_more_txn_post_last [ label="BTF\nlen==1" ]
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r_last_txn_post_last -> stopping [ label="auto" ]
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r_more_txn_post_last -> starting [ label="auto" ]
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}
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