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modbus: stop bits can now be set individually in client mode

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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>
This commit is contained in:
Constantin Krischke 2021-11-16 16:14:28 +01:00 • committed by Anas Nashif
commit 8ee675946c
5 changed files with 31 additions and 2 deletions
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6
subsys/modbus/modbus_core.c
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@ -238,6 +238,8 @@ int modbus_init_server(const int iface, struct modbus_iface_param param)
goto init_server_error;
}
ctx->client = false;
switch (param.mode) {
case MODBUS_MODE_RTU:
case MODBUS_MODE_ASCII:
@ -262,7 +264,6 @@ int modbus_init_server(const int iface, struct modbus_iface_param param)
goto init_server_error;
}
ctx->client = false;
ctx->unit_id = param.server.unit_id;
ctx->mbs_user_cb = param.server.user_cb;
if (IS_ENABLED(CONFIG_MODBUS_FC08_DIAGNOSTIC)) {
@ -298,6 +299,8 @@ int modbus_init_client(const int iface, struct modbus_iface_param param)
goto init_client_error;
}
ctx->client = true;
switch (param.mode) {
case MODBUS_MODE_RTU:
case MODBUS_MODE_ASCII:
@ -322,7 +325,6 @@ int modbus_init_client(const int iface, struct modbus_iface_param param)
goto init_client_error;
}
ctx->client = true;
ctx->unit_id = 0;
ctx->mbs_user_cb = NULL;
ctx->rxwait_to = param.rx_timeout;