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Diffstat (limited to 'doc/openOCD.md')
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diff --git a/doc/openOCD.md b/doc/openOCD.md index ef0f6605..34f62425 100644 --- a/doc/openOCD.md +++ b/doc/openOCD.md @@ -1,4 +1,5 @@ # OpenOCD and STLink + OpenOCD (**Open O**n **C**hip **D**ebugger) is an open source tool that interfaces with many SWD/JTAG debugger to provide debugging and *in-system* programming for embedded target devices. OpenOCD supports the **NRF52** (the CPU of the PineTime) and the **STLinkV2**, a cheap SWD debugger. @@ -6,9 +7,10 @@ OpenOCD supports the **NRF52** (the CPU of the PineTime) and the **STLinkV2**, a OpenOCD works on X86 computers, ARM/ARM64 computers, and SBCs (like the RaspberryPi and Pine64 Pinebook Pro)! ## Installation + We will build OpenOCD from sources, as packages from Linux distributions are most of the time outdated and do not support the NRF52 properly. - - Fetch the sources from GIT, and build and install it: +- Fetch the sources from GIT, and build and install it: ``` git clone https://git.code.sf.net/p/openocd/code openocd-code @@ -21,13 +23,14 @@ make -j 4 sudo make install ``` - - Configure UDEV to allow OpenOCD to open the interface to your STLinkV2: +- Configure UDEV to allow OpenOCD to open the interface to your STLinkV2: + ``` sudo cp contrib/60-openocd.rules /etc/udev/rules.d/ sudo udevadm control --reload-rules ``` - - You can now plug your STLinkV2 into a USB port and run OpenOCD to see if it's working correctly: +- You can now plug your STLinkV2 into a USB port and run OpenOCD to see if it's working correctly: ``` $ openocd -f interface/stlink.cfg -f target/nrf52.cfg @@ -50,11 +53,14 @@ Info : STLINK V2J34S7 (API v2) VID:PID 0483:3748 Info : Target voltage: 3.294340 Error: init mode failed (unable to connect to the target) ``` + Ok, OpenOCD is running and it detects my STLinkV2. The last error shows that I've not connected the STLinkV2 to the PineTime. ## Configuration files + OpenOCD is configured using configuration files. First, we need a common configuration file for the project : **openocd-stlink.ocd**: + ``` source [find interface/stlink.cfg] @@ -63,11 +69,13 @@ gdb_breakpoint_override hard source [find target/nrf52.cfg] ``` + This file specifies to OpenOCD which debugger and target it will be connected to. Then, we use various *user files* to use OpenOCD to flash InfiniTime binary files. This files flashes the bootloader and the application firmware : **flash_bootloader_app.ocd**: + ``` init @@ -78,6 +86,7 @@ reset ``` And this one flashes the graphics flasher (it writes the bootloader graphics into the SPI NOR flash memory) : **flash_graphics.ocd**: + ``` init @@ -87,17 +96,21 @@ reset ``` ## Examples + ### Flash bootloader and application + ``` openocd -f ./openocd-stlink.ocd -f ./flash_bootloader_app.ocd ``` ### Flash graphics flasher + ``` openocd -f ./openocd-stlink.ocd -f ./flash_graphics.ocd ``` ## Connect the STLinkV2 to the PineTime + Here is an example using the pogo pins:   |