These calls are executed from an event handler and were previously nonblocking,
but they have no partial read/write handling. The code is already marked TODO
for improvement.
This call is executed from an event handler and was previously nonblocking,
but has no partial write handling. It sends a short packet so should be OK
to block, most likely the output buffer will be empty anyway.
This call was already nonblocking since the driver opens the port with the
SERIAL_NONBLOCK flag. It only reads one byte, and a zero result is handled
appropriately.
This call was previously explicitly nonblocking, but has no partial write
handling. It sends a short packet so should be OK to block, most likely the
output buffer will be empty anyway.
This call was already nonblocking since the driver opens the port with the
SERIAL_NONBLOCK flag. It only reads one byte, and a zero result is handled
appropriately.
This call is executed from an event handler and was previously nonblocking,
but has no partial write handling. It sends a short packet so should be OK
to block, most likely the output buffer will be empty anyway.
These calls are executed from an event handler and were previously nonblocking,
but have no partial write handling. They send short packets so should be OK to
block, most likely the output buffer will be empty anyway.
Fix error handling for some: serial_write can return any negative error code.
This call was previously nonblocking, but there is no handling of partial
writes. It is called from config_set where it is free to block.
Also fix error handling: serial_write can return any negative error code,
not just -1.
These calls were already nonblocking since the driver opens the port with the
SERIAL_NONBLOCK flag. They only read one byte. A return value of zero is not
handled, but should not occur in theory due to the G_IO_IN check. It might be
good to add handling of a zero return anyway, since I'm not sure if this is
always accurate.
This call was already nonblocking since the driver opens the port with the
SERIAL_NONBLOCK flag. It only reads one byte, and a zero result is handled
appropriately.
These calls are executed from an event handler and were previously nonblocking,
but have no partial write handling. They send short packets so should be OK to
block, most likely the output buffer will be empty anyway.
Also fix error handling for these calls, which seems to have been retained from
previous direct usage of write() to a serial port fd.
These calls were previously nonblocking, but have no partial write handling.
They are made from scan and acquisition_start contexts where they are free
to block.
Remove the SERIAL_NONBLOCK at open, which only applied during scan, since all
calls in the scan are now explicitly blocking.
Also fix error handling for these calls, which appears to have been kept
from a previous direct usage of write() on a serial port fd.
This call was already nonblocking since the driver opens the port with the
SERIAL_NONBLOCK flag. Only one byte is read. The case of 0 being returned
is not handled, but the call is only made if G_IO_IN occurred so in theory,
there should be a byte available. It might be wise to add handling for a
return of 0 nonetheless, as I'm not sure if this is always accurate.
This is an odd one. These calls are made from a receive handler so should not
block, and appear to be setup correctly to handle partial reads or no data
available. However, the driver was not opening the port with SERIAL_NONBLOCK
so these calls would have been blocking. Make them nonblocking.
This call is executed from an event handler and was previously nonblocking,
but has no partial write handling. It sends a short packet so should be OK
to block, most likely the output buffer will be empty anyway.
These calls were already nonblocking since this driver opened the port with
the SERIAL_NONBLOCK flag. Having marked them as such, we can remove the flag.
Also remove an unnecessary reopen of the port to change its blocking status.
This call is executed from an event handler and was previously nonblocking,
but has no partial write handling. It sends a short packet so should be OK
to block, most likely the output buffer will be empty anyway.
This call is executed from an event handler and was previously nonblocking,
but has no partial write handling. It sends a short packet so should be OK
to block, most likely the output buffer will be empty anyway.
This is called at scan time so free to block. There is no partial write
handling and a response is expected afterwards. This should therefore be a
blocking call.
This call is executed from an event handler context was previously
nonblocking, however there is no handling for a partial write.
The output buffer is unlikely to be full and the commands to be sent
are short, so it should be OK to make this a blocking call.
This call is executed at scan time so is free to block. There is no
handling for a partial write and a response is expected immediately
afterwards. It should therefore be a blocking call.
Every driver now publishes its device option config keys, i.e. the
list fetched with sr_config_list(SR_CONF_DEVICE_OPTIONS), with a
set of flags indicating which methods are implemented by the driver
for that key.
The config keys are OR'ed with any combination of SR_CONF_GET,
SR_CONF_SET and SR_CONF_LIST. These are defined as the high bits
of the uint32_t config key. Clients can OR config keys with
SR_CONF_MASK to strip out these bits. This mask will be kept up to
date if other bits are added to the capabilities list; clients MUST
therefore use SR_CONF_MASK for this.
Some keys don't have capability bits added, such as the informative
device type keys (SR_CONF_MULTIMETER, SR_CONF_OSCILLOSCOPE, ...) and
SR_CONF_CONTINUOUS.
Scan options do not have capabilities bits.
From sigrok's point of view, this analyzer has two differences:
* It does not require uploading the firmware.
* It returns garbage in some registers used for sanity checks.
Saleae's software ignores that garbage; sigrok only does if it
specifically detects the mcupro clone.
Previous runs of dev_acquisition_start() keep the enabled_channels list
populated if they fail. This means that once an invalid channel
configuration was detected, it will be detected again even if the channel
configuration was changed. With this change, the list will be cleared
before being populated so that any stale entries are removed.
The Brymen BM25x series supports the BC-20X that is an opto-isolated
serial cable. The link seems to be unidirectional i.e. when activated
the DMM periodically sends updates to the host while the host cannot
control the DMM in any way.
The protocol is documented in "6000-count-digital-multimeters-r1.pdf"
that is available from the manufacturer. Every 15 byte packet consists
of a bitmap where the bits correspond to segments or symbols on the
LCD display i.e. the DMM essentially sends the contents of its screen
to the host in every update. This driver then decodes the measured
quantity, unit and its value from the bitmap.
Martin Ling
Bert Vermeulen
Uwe Hermann
Aurelien Jacobs
Matthias Heidbrink
Soeren Apel
Peter Zotov
magnuskarlsson
Marc Schink
Marcus Comstedt
Janne Huttunen