102 lines
3.0 KiB
Markdown
102 lines
3.0 KiB
Markdown
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# Configuration
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The configuration in cleanflight is stored at the end of the flash ram, currently it uses 2-4KB of flash depending on the target.
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Sometimes it's necessary to erase this during development.
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## Erasing
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Generate a 2-4kb blank file.
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2kb:
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```
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dd if=/dev/zero of=obj/blankconfig.bin bs=1024 count=2
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```
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4kb:
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```
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dd if=/dev/zero of=obj/blankconfig.bin bs=1024 count=4
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```
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Overwrite configuration using JLink
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Run JLink (OSX: `/Applications/SEGGER/JLink/JLinkExe`)
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Execute commands
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`device <your device>`, e.g. `STM32F303CB`
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`r`
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`h`
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`loadbin obj/blankconfig.bin, <address>`
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`r` to Reboot FC.
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`q` to quit
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the address is the address of the end of the flash ram minus the size of the configuration.
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example addresses:
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```
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64k device/2kb config = 0x800F800
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128k device/2kb config = 0x801F800
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128k device/4kb config = 0x801F000
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256k device/2kb config = 0x803f800
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256k device/4kb config = 0x803f000
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```
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Example session
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```
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$ /Applications/SEGGER/JLink/JLinkExe
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SEGGER J-Link Commander V4.90c ('?' for help)
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Compiled Aug 29 2014 09:52:38
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DLL version V4.90c, compiled Aug 29 2014 09:52:33
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Firmware: J-Link ARM-OB STM32 compiled Aug 22 2012 19:52:04
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Hardware: V7.00
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S/N: -1
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Feature(s): RDI,FlashDL,FlashBP,JFlash,GDBFull
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VTarget = 3.300V
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Info: Could not measure total IR len. TDO is constant high.
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Info: Could not measure total IR len. TDO is constant high.
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No devices found on JTAG chain. Trying to find device on SWD.
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Info: Found SWD-DP with ID 0x2BA01477
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Info: Found Cortex-M4 r0p1, Little endian.
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Info: FPUnit: 6 code (BP) slots and 2 literal slots
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Info: TPIU fitted.
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Info: ETM fitted.
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Cortex-M4 identified.
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Target interface speed: 100 kHz
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J-Link>device STM32F303CC
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Info: Device "STM32F303CC" selected (256 KB flash, 32 KB RAM).
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Reconnecting to target...
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Info: Found SWD-DP with ID 0x2BA01477
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Info: Found SWD-DP with ID 0x2BA01477
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Info: Found Cortex-M4 r0p1, Little endian.
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Info: FPUnit: 6 code (BP) slots and 2 literal slots
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Info: TPIU fitted.
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Info: ETM fitted.
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J-Link>r
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Reset delay: 0 ms
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Reset type NORMAL: Resets core & peripherals via SYSRESETREQ & VECTRESET bit.
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J-Link>h
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PC = 08001154, CycleCnt = 00000000
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R0 = 00000000, R1 = 00000000, R2 = 00000000, R3 = 00000000
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R4 = 00000000, R5 = 00000000, R6 = 00000000, R7 = 00000000
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R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
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R12= 00000000
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SP(R13)= 2000A000, MSP= 2000A000, PSP= 00000000, R14(LR) = FFFFFFFF
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XPSR = 01000000: APSR = nzcvq, EPSR = 01000000, IPSR = 000 (NoException)
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CFBP = 00000000, CONTROL = 00, FAULTMASK = 00, BASEPRI = 00, PRIMASK = 00
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FPU regs: FPU not enabled / not implemented on connected CPU.
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J-Link>loadbin obj/blankconfig.bin, 0x803f800
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Downloading file [obj/blankconfig.bin]...
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WARNING: CPU is running at low speed (7989 kHz).
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Info: J-Link: Flash download: Flash programming performed for 1 range (2048 bytes)
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Info: J-Link: Flash download: Total time needed: 1.254s (Prepare: 0.698s, Compare: 0.009s, Erase: 0.075s, Program: 0.405s, Verify: 0.005s, Restore: 0.059s)
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O.K.
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J-Link>r
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Reset delay: 0 ms
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Reset type NORMAL: Resets core & peripherals via SYSRESETREQ & VECTRESET bit.
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J-Link>q
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```
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