While SPDX license identifiers are usually considered to be
case-insensitive, matching the case of the canonical identifier is
recommended by the SPDX specification.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
A byte received when reception has been disabled
corrupts internal state of the server
(e.g. during transmission of a reply in server mode).
The reponse packet is corrupted and its transmission is aborted and the
data in the buffer is treated by the server as a new incoming packet.
Since the buffer is corrupted CRC doesn't match and the following log
message is printed:
<wrn> modbus_serial: Calculated CRC does not match received CRC
This condition happens when uart_irq_rx_ready() returns true if there is
a new byte in the receive FIFO even with disabled RX interrupt.
The issue has been discovered on a nucleo_u083rc board with a RS485
transceiver with the RI signal floating (a pull-down gives more stable
reproduction). The pull-down ensures that RI is low during transmission
which is seen as byte 0 with a framing error by the receiver.
The byte is received by the MCU and corrupts the response.
Similar effect can be achieved by not disabling the receiver during
transmission (i.e. nRE is driven by the MCU and is fixed low).
The fix discards any data received when reception has been disabled.
Signed-off-by: Maksim Salau <msalau@iotecha.com>
The mode is activated by the CONFIG_MODBUS_NONCOMPLIANT_SERIAL_MODE option
and allows any stop-bit setting for the serial port.
Signed-off-by: Maksim Salau <msalau@iotecha.com>
uart_irq_callback_user_data_set return non-zero if the callback function
can't be set. This might happen if you forgot to enable
CONFIG_UART_INTERRUPT_DRIVEN.
Signed-off-by: Stephan Gatzka <stephan.gatzka@gmail.com>
Simplify `uart_cb_handler` by directly using `dev` instead of `cfg->dev`,
as both hold the same value.
Signed-off-by: Pisit Sawangvonganan <pisit@ndrsolution.com>
Logging v1 has been removed and log_strdup wrapper function is no
longer needed. Removing the function and its use in the tree.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
In order to bring consistency in-tree, migrate all subsystems code to
the new prefix <zephyr/...>. Note that the conversion has been scripted,
refer to zephyrproject-rtos#45388 for more details.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Added the stop_bits_client parameter to the modbus_serial_param struct.
Being able to configure the number of stop bits for the client
independently from the parity setting, allows to support connecting to
modbus server that do not follow the MODBUS over Serial Line Specification
and Implementation Guide.
Signed-off-by: Constantin Krischke <constantin.krischke@lemonbeat.com>
Signed-off-by: Jan Geldmacher <jan.geldmacher@lemonbeat.com>
On some platforms, if there are multiple MODBUS interfaces,
receiving of RTU frames may fail. Replacing while loop with
just "if" fixes this problem.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
This patch is to fix an issue where the transceiver chip is
disabled before it has transmitted all data. This causes the
message to be corrupted because the last few bytes are missing.
The fix adds a check to make sure the transmission is completed
before disabling the transceiver.
Signed-off-by: Marius Scholtz <mariuss@ricelectronics.com>
In previous commits the crc16_ansi() function has been made compliant
with the CRC-16-ANSI aka CRC-16-MODBUS standard. Use that standard
function instead of a custom one.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
Prefix internal functions and structs with modbus_.
Use unit_id consistently instead of node_addr.
Fix mbm_ remainder and rename to mbc_.
Rename struct modbus_frame to modbus_adu since
ADU is closer to what the structure represents.
Let the compiler/linker do the job and
remove ifdef around mbc_validate_fc03fp_response().
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
