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Feature: BMP platform Cortex-M exception handlers#1957
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6 tasks
… writing firmware
…v8-M main profile
…adability in the USB configuration setup code
…per use of atomics, resulting in smaller and more correct code
…roper use of atomics, resulting in smaller and more correct code
…change notifications so it's a little more responsive without being overwhelming for traffic
…correctly and the pins are driven suitably hard
…the on-board Flash
… function that requires `target` to be a valid non-NULL pointer
…rd response when the argument decoder fails
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…K blocks as found on the Lattice Versa boards
…nk v2 firmware to make things fit again
…and stubs for manipulating it
…ulation to implement Flash functions
…ut of programming mode
…lock_flash_erase`
…ommand This was found by looking at the JTAG traffic the lattice diamond programmer generated when programming the ispCLOCK device, and the name was extracted from a JED for the ispCLOCK being converted to an svf file, as the name for this command was included in a comment in the resulting file.
…_done` These now properly handle the setup and exit for programming ispCLOCK devices
…e attached ispCLOCK device. After much mucking about and trying to figure out what the lattice programmer was doing and how much of it is required, the method for properly programming the ispCLOCK devices was figured out, which does include wiggling TCK, for some reason....
This is used so we can verify the contents of the the ispCLOCK device and ensure that the correct configuration for it was written
* Extract the memory write into a dedicated helper function * Wrap it into TRY-CATCH macros * Drop the extraneous 10ms delay introduced back in PR2072
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Detailed description
blocking_handler()'s with meaningful handlers which set a morse message and spin the systick (because of priority) for 10 seconds then reboot the probe.I'm not sure if
platform_request_boot()to request "stay in DFU" is better than just rebooting the probe, or if USB D+ pulse low is needed to trigger re-enumeration on some platforms, so I coded a directscb_reset_system()instead. Future PRs could unwind the stack (I have tried implementing just that) and/or record crash dumps to SRAM or SPI flash or UART. If MPU is enabled by platform, to e.g. catch NULL dereferences, then there's a simple handler for that, too. Platforms should enable separateSCB->SHCSRBusFault and UsageFault bits for this code to distinguish between them.Note I don't spin the UART/DMA/TIM or USB device IRQ handlers, but it technically could also be done to keep UART DMA and USB (DFU runtime stub, CDC-ACM, suspend/reset) working for a while for logging purposes. Notably
sys_tick_handler()onnativeindirectly checks for Vtpwr undervoltage. I have not tested how this behaves yet.Your checklist for this pull request
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