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zephyr-flash-pyocd.bbclass: Implement configurable probe IDs to program

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Implement logic to configure what probes to program based on the
PYOCD_FLASH_IDS variable:
1. by default program all attached probes
2. change default behaviour by listing the probe IDs to flash

CONNECT_TIMEOUT_SECONDS was also renamed to maintain consistency with
the PYOCD_FLASH_IDS variable.

One can query the IDs using `pyocd list`.

The value of PYOCD_FLASH_IDS can also be injected into the datastore
using BB_ENV_EXTRAWHITE.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>
Signed-off-by: Naveen Saini <naveen.kumar.saini@intel.com>
This commit is contained in:
Andrei Gherzan
2021-02-16 15:33:08 +00:00
committed by Naveen Saini
parent 7dcb47371b
commit 8d54c98cc2
2 changed files with 48 additions and 18 deletions
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57
classes/zephyr-flash-pyocd.bbclass
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@@ -1,4 +1,5 @@
CONNECT_TIMEOUT_SECONDS ?= "30"
PYOCD_CONNECT_TIMEOUT_SECONDS ?= "30"
PYOCD_FLASH_IDS ?= "all"
python do_flash_usb() {
try:
@@ -7,26 +8,46 @@ python do_flash_usb() {
except ImportError:
bb.fatal("Flashing with pyocd needs the relevant python package. Make sure your host provides it or consult your distribution packages for how to install this prerequisite.")
timeout = int(d.getVar('CONNECT_TIMEOUT_SECONDS'))
try:
timeout = int(d.getVar('PYOCD_CONNECT_TIMEOUT_SECONDS'))
except ValueError:
bb.fatal(f"PYOCD_CONNECT_TIMEOUT_SECONDS was set to an invalid value: {d.getVar('PYOCD_CONNECT_TIMEOUT_SECONDS')}.")
image = f"{d.getVar('DEPLOY_DIR_IMAGE')}/{d.getVar('PN')}.elf"
bb.plain(f"Attempting to flash {image} to board {d.getVar('BOARD')}")
ids = d.getVar('PYOCD_FLASH_IDS')
# Try to connect to a probe with a timeout
now = 0
step = 3
while True:
session = ConnectHelper.session_with_chosen_probe(blocking=False, return_first=True)
if session:
break
if now >= timeout:
bb.fatal("Timeout while trying to connect to a probe. Make sure the target device is connected and the udev is configured accordingly. See <https://github.com/mbedmicro/pyOCD/tree/master/udev> for help.")
bb.warn("Can't connect to the probe. Retrying in %d seconds..." % step)
time.sleep(step)
now += step
# Compute the list of IDs to program
if ids == 'all':
ids = []
for probe in ConnectHelper.get_all_connected_probes(blocking=False):
ids.append(probe.unique_id)
if not ids:
bb.fatal("No probe detected. Make sure your target is connected.")
else:
ids = ids.split()
if not ids:
bb.fatal("No probe requested for programming. Make sure PYOCD_FLASH_IDS is set.")
with session:
FileProgrammer(session).program(image)
session.board.target.reset()
# Program each ID
for id in ids:
bb.plain(f"Attempting to flash {os.path.basename(image)} to board {d.getVar('BOARD')} [{id}]")
# Try to connect to a probe with a timeout
now = 0
step = 3
while True:
session = ConnectHelper.session_with_chosen_probe(blocking=False, return_first=True, unique_id=id)
if session:
break
if now >= timeout:
bb.fatal(f"Timeout while trying to connect to probe ID: {id}. Make sure the target device is connected and the udev is configured accordingly. See <https://github.com/mbedmicro/pyOCD/tree/master/udev> for help.")
bb.warn(f"Can't connect to the probe ID: {id}. Retrying in {step} seconds...")
time.sleep(step)
now += step
# Program the selected probe
with session:
FileProgrammer(session).program(image)
session.board.target.reset()
}
addtask do_flash_usb after do_deploy