Info : Listening on port 3333 for gdb connections Info : starting gdb server for stm32f0x.cpu on 3333 Info : stm32f0x.cpu: hardware has 4 breakpoints, 2 watchpoints Info : SWCLK/TCK = 0 SWDIO/TMS = 0 TDI = 0 TDO = 0 nTRST = 0 nRESET = 0 Info : CMSIS-DAP: Interface Initialised (SWD )
Info : Using CMSIS-DAPv2 interface with VID:PID =0x2e8a:0x000c, serial =E6614103E78B482F Info : Listening on port 4444 for telnet connections Info : Listening on port 6666 for tcl connections Info : auto-selecting first available session transport "swd". After getting that set up, I fired up OpenOCD: $ openocd -f interface/cmsis-dap.cfg -f target/stm32f0x.cfg Serial Wire Debug (SWD), the natural next step was to hook up a Raspberry Piĭebug Probe to those. Seeing as two of the other pads are connected to SWDIO and SWCLK, used for Flash : Up to 32KiB (size first sector: 4x1024 ) RAM : Up to 4KiB (2048b reserved by bootloader ) This made it easy to pull BOOT0 high, so the MCU boots into its internalīy hooking up a USB to 3.3V TTL device to the USART1 pads, I could dump theįlash: $. Thought was whether I could dump the flash memory to do some static analysis.Īfter quickly skimming MCU docs, and a little bit of multimeter probing, I That looked like an STM32F030C6T6, which is an ARM Cortex M0-based MCU. Whether I could debug it, and perhaps even extend the software to do more usefulįeeling the urge to open it up to poke at the electronics inside of it, I One ended up collecting dust for a while. I ended up buying a second cat door and, lo and behold, no more issues. It hard to get a good night’s sleep when having to get up to let them back in It’s also no surprise that they’d end up making a lot of noise, in turn making This was obviously not much fun for our cats: With the retailer, double-checking the installation and such, it would workįor a little while before it eventually started malfunctioning. Perhaps even microcontrollers… MicrocontrollersĮarlier this year my family’s cat door broke down. Software, to also support instrumenting OS kernels as well as barebone systems. For quite some years I’ve been dreaming of taking Frida beyond user-space
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