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feat(shell): Add commands to configure Modbus

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- Implement a new 'modbus' command in the shell.
- Add sub-commands 'set_baud', 'set_id', and 'show'.
- Add validation for baud rate and slave ID inputs.
- The new parameters are applied to the Modbus server at runtime, allowing for live reconfiguration of the communication settings.
- The shell backend is set to RTT.
This commit is contained in:
Eduard Iten
2025-07-01 15:27:57 +02:00
parent b836f9a2f4
commit 6a9e4773ea
6 changed files with 170 additions and 21 deletions
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77
software/apps/slave_node/src/main.c
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@@ -12,6 +12,8 @@
#include <zephyr/usb/usb_device.h>
#include <zephyr/logging/log.h>
#include "modbus_bridge.h"
LOG_MODULE_REGISTER(mbs_sample, LOG_LEVEL_INF);
#define APP_VERSION_MAJOR 1
@@ -32,6 +34,20 @@ enum {
static uint16_t watchdog_timeout_s;
static int modbus_iface;
static struct modbus_iface_param server_param = {
.mode = MODBUS_MODE_RTU,
.server = {
.user_cb = NULL, // Will be set later
.unit_id = 1,
},
.serial = {
.baud = 19200,
.parity = UART_CFG_PARITY_NONE,
},
};
static int coil_rd(uint16_t addr, bool *state)
{
@@ -112,33 +128,56 @@ static struct modbus_user_callbacks mbs_cbs = {
.input_reg_rd = input_reg_rd,
};
const static struct modbus_iface_param server_param = {
.mode = MODBUS_MODE_RTU,
.server = {
.user_cb = &mbs_cbs,
.unit_id = 1,
},
.serial = {
.baud = 19200,
.parity = UART_CFG_PARITY_NONE,
},
};
#define MODBUS_NODE DT_COMPAT_GET_ANY_STATUS_OKAY(zephyr_modbus_serial)
int modbus_reconfigure(uint32_t baudrate, uint8_t unit_id)
{
int err;
LOG_INF("Reconfiguring Modbus: baudrate=%u, id=%u", baudrate, unit_id);
err = modbus_disable(modbus_iface);
if (err) {
LOG_ERR("Failed to disable Modbus: %d", err);
return err;
}
server_param.serial.baud = baudrate;
server_param.server.unit_id = unit_id;
err = modbus_init_server(modbus_iface, server_param);
if (err) {
LOG_ERR("Failed to re-init Modbus server: %d", err);
return err;
}
return 0;
}
uint32_t modbus_get_baudrate(void)
{
return server_param.serial.baud;
}
uint8_t modbus_get_unit_id(void)
{
return server_param.server.unit_id;
}
static int init_modbus_server(void)
{
const char iface_name[] = {DEVICE_DT_NAME(MODBUS_NODE)};
int iface;
iface = modbus_iface_get_by_name(iface_name);
if (iface < 0) {
modbus_iface = modbus_iface_get_by_name(iface_name);
if (modbus_iface < 0) {
LOG_ERR("Failed to get iface index for %s", iface_name);
return iface;
return modbus_iface;
}
return modbus_init_server(iface, server_param);
server_param.server.user_cb = &mbs_cbs;
return modbus_init_server(modbus_iface, server_param);
}
int main(void)
@@ -154,4 +193,4 @@ int main(void)
}
return 0;
}
}