From: Zbigniew Bodek <[email protected]> By default, pyocd uses generic target type called "cortex_m" which should be able to connect and debug but not flash the memory. Normally pyocd would warn us of using default target instead of proper one but this message wasn't displayed.
Despite not providing target type, flashing process succeeded but results were undefined. On Nitrogen, sometimes it worked (especially for small images) and sometimes the programmed device crashed miserably. Fix flashing operation by providing pyocd target type acquired from the conditional PYOCD_TARGET variable declared for each machine (chip family). Signed-off-by: Zbigniew Bodek <[email protected]> --- classes/zephyr-flash-pyocd.bbclass | 10 +++++++++- conf/machine/include/nrf52832.inc | 3 +++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/classes/zephyr-flash-pyocd.bbclass b/classes/zephyr-flash-pyocd.bbclass index a873be4..6517945 100644 --- a/classes/zephyr-flash-pyocd.bbclass +++ b/classes/zephyr-flash-pyocd.bbclass @@ -27,6 +27,9 @@ python do_flash_usb() { if not ids: bb.fatal("No probe requested for programming. Make sure PYOCD_FLASH_IDS is set.") + # Fetch target type to pass to the ConnectHelper + target = d.getVar('PYOCD_TARGET') + # Program each ID for id in ids: bb.plain(f"Attempting to flash {os.path.basename(image)} to board {d.getVar('BOARD')} [{id}]") @@ -35,7 +38,12 @@ python do_flash_usb() { now = 0 step = 3 while True: - session = ConnectHelper.session_with_chosen_probe(blocking=False, return_first=True, unique_id=id) + if target is not None: + session = ConnectHelper.session_with_chosen_probe(blocking=False, return_first=True, unique_id=id, target_override=target) + else: + bb.warn(f"Target type not provided. Flashing may fail or result in an undefined behavior.") + session = ConnectHelper.session_with_chosen_probe(blocking=False, return_first=True, unique_id=id) + if session: break if now >= timeout: diff --git a/conf/machine/include/nrf52832.inc b/conf/machine/include/nrf52832.inc index 73e628a..e938aa6 100644 --- a/conf/machine/include/nrf52832.inc +++ b/conf/machine/include/nrf52832.inc @@ -8,3 +8,6 @@ require conf/machine/include/tune-cortexm4.inc MACHINEOVERRIDES =. "nordic:" TUNE_FEATURES = "armv7m cortexm4" + +# Target type for this machine used by Pyocd +PYOCD_TARGET = "nrf52" -- 2.25.1
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