52 lines
2.0 KiB
INI
52 lines
2.0 KiB
INI
# OpenOCD Configuration to REBOOT a SiFive HiFive Pro P550 Board (v2)
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# ----------------------------------------------------------------
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# 1. Adapter and Board Configuration
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# ----------------------------------------------------------------
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adapter driver ftdi
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ftdi channel 2
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ftdi vid_pid 0x0403 0x6011
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ftdi layout_init 0x0808 0x0a1b
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ftdi layout_signal nSRST -oe 0x0200
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ftdi layout_signal nTRST -data 0x0100 -oe 0x0100
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# ----------------------------------------------------------------
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# 2. JTAG Chain and Target Configuration
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# ----------------------------------------------------------------
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transport select jtag
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set _CHIPNAME riscv
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jtag newtap $_CHIPNAME cpu -irlen 5
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target create riscv.cpu0 riscv -chain-position $_CHIPNAME.cpu -coreid 0
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target create riscv.cpu1 riscv -chain-position $_CHIPNAME.cpu -coreid 1
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target create riscv.cpu2 riscv -chain-position $_CHIPNAME.cpu -coreid 2
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target create riscv.cpu3 riscv -chain-position $_CHIPNAME.cpu -coreid 3
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target smp riscv.cpu0 riscv.cpu1 riscv.cpu2 riscv.cpu3
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# ----------------------------------------------------------------
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# 3. Reset Configuration and Execution
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# ----------------------------------------------------------------
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# Configure the reset signal.
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# srst_only: Asserts only nSRST.
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# srst_pulls_trst: Informs OpenOCD that nSRST and nTRST are connected.
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# srst_assert_width: Hold the reset signal for 100ms (a good, long pulse).
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# srst_deassert_delay: Wait 100ms after releasing reset for the system to stabilize.
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reset_config srst_only srst_pulls_trst srst_assert_width 100 srst_deassert_delay 100
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# Initialize OpenOCD and connect to the target
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init
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# --- The Improved Reboot Sequence ---
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# This is the most reliable way to gain control and issue a reset.
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# 'reset halt' asserts the reset line, then immediately halts the cores
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# as they come out of reset, before they can execute any code.
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echo "!!! Issuing reset halt to gain control..."
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reset halt
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# Now that the system is halted and stable, we can let it run.
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echo "!!! Resuming execution to complete the reboot..."
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resume
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# Exit OpenOCD
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shutdown |