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samples: boards : Wi-Fi SiWx91x sample app
This application demonstrates support for SiWx91x ICMP and DNS protocols Co-authored-by: Swami Das Nampalli <swami.das@silabs.com> Signed-off-by: Swami Das Nampalli <swami.das@silabs.com> Signed-off-by: Rahul Gurram <rahul.gurram@silabs.com>
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‎samples/boards/siwx91x/siwx91x_sample_app/CMakeLists.txt

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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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project(siwx91x_sample_app)
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target_sources(app PRIVATE src/main.c)

‎samples/boards/siwx91x/siwx91x_sample_app/README.rst

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.. zephyr:code-sample:: siwx91x_sample_app
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:name: siwx91x sample app
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Overview
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********
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A sample application that demonstrates the DNS client and ICMP functionality.
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This program will get the IP address of the given hostname and the ICMP will
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initiate a PING request to the address obtained from the DNS client.
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Requirements
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************
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* Windows PC (Remote PC).
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* SiWx91x Wi-Fi Evaluation Kit(SoC).
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Configuration Parameters
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************************
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The below confgurations are available in app_config.h file
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#define SSID "SiWx91x_AP" // Wi-Fi Network Name
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#define PSK "12345678" // Wi-Fi Password
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#define SECURITY_TYPE WIFI_SECURITY_TYPE_PSK // Wi-Fi Security Type: WIFI_SECURITY_TYPE_NONE/WIFI_SECURITY_TYPE_WPA_PSK/WIFI_SECURITY_TYPE_PSK
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#define CHANNEL_NO WIFI_CHANNEL_ANY // Wi-Fi channel
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#define HOSTNAME "www.zephyrproject.org" //Hostname to ping
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Building and Running
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********************
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* This sample can be found under :zephyr_file:`zephyr/samples/boards/siwx91x/siwx91x_sample_app` in the Zephyr tree.
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* Build:- west build -b siwx917_rb4338a samples/boards/siwx91x/siwx91x_sample_app/ -p
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* Flash:- west flash
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Test the Application
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********************
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* Open any serial console to view logs.
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* After program gets executed, SiWx91x EVK will be connected to an Access Point with configured **SSID** and **PSK**
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* The device will start sending ping requests to the given hostname and the response can be seen in network_event_handler().

‎samples/boards/siwx91x/siwx91x_sample_app/prj.conf

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CONFIG_WIFI=y
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CONFIG_NETWORKING=y
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CONFIG_WIFI_SILABS_SIWX91X_NET_STACK_OFFLOAD=y
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CONFIG_NET_IPV4=y
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CONFIG_NET_DHCPV4=y
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CONFIG_NET_IPV6=n
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CONFIG_NET_DHCPV6=n
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CONFIG_MAIN_STACK_SIZE=2048
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CONFIG_WIFI_SILABS_SIWX91X_PING=y
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CONFIG_WIFI_SILABS_SIWX91X_DNS_CLIENT=y

‎samples/boards/siwx91x/siwx91x_sample_app/sample.yaml

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sample:
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name: siwx91x sample app
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description: Demonstrates ICMP functionality
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tests:
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sample.boards.siwx91x.siwx91x_sample_app:
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harness: Wi-Fi
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platform_allow:
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- siwx917_rb4338a
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tags: Wi-Fi
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integration_platforms:
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- siwx917_rb4338a

‎samples/boards/siwx91x/siwx91x_sample_app/src/app_config.h

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#ifndef _CONFIG_H_
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#define _CONFIG_H_
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/* Wi-Fi Network Name */
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#define SSID "SiWx91x_AP"
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/* Wi-Fi Password */
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#define PSK "12345678"
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/* Wi-Fi Security Type:
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* WIFI_SECURITY_TYPE_NONE/WIFI_SECURITY_TYPE_WPA_PSK/WIFI_SECURITY_TYPE_PSK
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*/
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#define SECURITY_TYPE WIFI_SECURITY_TYPE_PSK
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/* Wi-Fi channel */
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#define CHANNEL_NO WIFI_CHANNEL_ANY
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#define STACK_SIZE 4096
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#define STATUS_OK 0
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#define STATUS_FAIL -1
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#define CMD_WAIT_TIME 180000
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/* Hostname to ping */
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#define HOSTNAME "www.zephyrproject.org"
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#define DNS_TIMEOUT (20 * MSEC_PER_SEC)
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#define PING_PACKET_SIZE 64
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#define PING_PACKETS 30
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static struct {
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const struct shell *sh;
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uint32_t scan_result;
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union {
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struct {
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uint8_t connecting: 1;
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uint8_t disconnecting: 1;
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uint8_t _unused: 6;
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};
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uint8_t all;
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};
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} context;
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#define WIFI_SHELL_MGMT_EVENTS (NET_EVENT_WIFI_CONNECT_RESULT)
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#endif /* _CONFIG_H_ */

‎samples/boards/siwx91x/siwx91x_sample_app/src/main.c

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/*
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* Copyright (c) 2012-2014 Wind River Systems, Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <zephyr/net/wifi_mgmt.h>
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#include <zephyr/net/net_if.h>
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#include "sl_net_ip_types.h"
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#include "sl_si91x_types.h"
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#include "sl_net_si91x.h"
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#include "sl_net_dns.h"
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#ifdef CONFIG_WIFI_SILABS_SIWX91X_PING
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#include "sl_net_ping.h"
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#endif
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#include "sl_net.h"
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#include "app_config.h"
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volatile uint8_t state = 0;
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static K_SEM_DEFINE(wlan_sem, 0, 1);
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K_THREAD_STACK_DEFINE(wifi_stack, STACK_SIZE);
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typedef enum siwx91x_app_state_e {
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SIWX91X_WIFI_CONNECT_STATE = 0,
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SIWX91X_IP_CONFIG_STATE,
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SIWX91X_PING_HOSTNAME_STATE
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} siwx91x_app_state_t;
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void application_start(void);
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static void wifi_mgmt_event_handler(struct net_mgmt_event_callback *cb, uint32_t mgmt_event,
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struct net_if *iface);
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static void handle_wifi_connect_result(struct net_mgmt_event_callback *cb);
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static sl_status_t network_event_handler(sl_net_event_t event, sl_status_t status, void *data,
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uint32_t data_length);
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static void dhcp_callback_handler(struct net_mgmt_event_callback *cb, uint32_t mgmt_event,
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struct net_if *iface)
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{
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uint8_t ipv4_addr[NET_IPV4_ADDR_LEN] = {0};
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uint8_t subnet[NET_IPV4_ADDR_LEN] = {0};
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uint8_t gateway[NET_IPV4_ADDR_LEN] = {0};
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int i = 0;
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if (mgmt_event != NET_EVENT_IPV4_ADDR_ADD) {
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return;
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}
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for (i = 0; i < ARRAY_SIZE(iface->config.ip.ipv4->unicast); i++) {
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if (iface->config.ip.ipv4->unicast[i].ipv4.addr_type != NET_ADDR_DHCP) {
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continue;
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}
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printf("Address[%d]: %s", net_if_get_by_iface(iface),
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net_addr_ntop(AF_INET,
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&iface->config.ip.ipv4->unicast[i].ipv4.address.in_addr,
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ipv4_addr, sizeof(ipv4_addr)));
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printf(" Subnet[%d]: %s", net_if_get_by_iface(iface),
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net_addr_ntop(AF_INET, &iface->config.ip.ipv4->unicast[i].netmask, subnet,
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sizeof(subnet)));
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printf(" Router[%d]: %s", net_if_get_by_iface(iface),
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net_addr_ntop(AF_INET, &iface->config.ip.ipv4->gw, gateway,
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sizeof(gateway)));
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k_sem_give(&wlan_sem);
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}
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}
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void application_start(void)
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{
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int32_t status = -1;
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uint8_t ping_count = 0;
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struct net_if *iface;
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printf("\r\nApplication started\r\n");
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state = SIWX91X_WIFI_CONNECT_STATE;
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while (1) {
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switch (state) {
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case SIWX91X_WIFI_CONNECT_STATE: {
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struct wifi_connect_req_params cnx_params;
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iface = net_if_get_first_wifi();
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memset(&cnx_params, 0, sizeof(struct wifi_connect_req_params));
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context.connecting = true;
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cnx_params.channel = CHANNEL_NO;
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cnx_params.band = 0;
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cnx_params.security = SECURITY_TYPE;
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cnx_params.psk_length = strlen(PSK);
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cnx_params.psk = PSK;
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cnx_params.ssid_length = strlen(SSID);
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cnx_params.ssid = SSID;
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status = net_mgmt(NET_REQUEST_WIFI_CONNECT, iface, &cnx_params,
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sizeof(struct wifi_connect_req_params));
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if (status != STATUS_OK) {
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printf("Connection request failed with error: %d\n", status);
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context.connecting = false;
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state = SIWX91X_WIFI_CONNECT_STATE;
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break;
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}
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printf("Connection requested\n");
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if (k_sem_take(&wlan_sem, K_MSEC(CMD_WAIT_TIME)) != STATUS_OK) {
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printf("\r\nWi-Fi connect failed\r\n");
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state = SIWX91X_WIFI_CONNECT_STATE;
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}
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} break;
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case SIWX91X_IP_CONFIG_STATE: {
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if (k_sem_take(&wlan_sem, K_MSEC(CMD_WAIT_TIME)) != STATUS_OK) {
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printf("\r\nIP config failed\r\n");
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state = SIWX91X_IP_CONFIG_STATE;
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break;
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}
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state = SIWX91X_PING_HOSTNAME_STATE;
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} break;
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case SIWX91X_PING_HOSTNAME_STATE: {
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sl_ip_address_t dns_ip = { 0 };
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sli_net_register_event_handler(network_event_handler);
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dns_ip.type = SL_IPV4;
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status = sl_net_dns_resolve_hostname(HOSTNAME, DNS_TIMEOUT,
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SL_NET_DNS_TYPE_IPV4, &dns_ip);
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if (status != STATUS_OK) {
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printf("\r\nDNS Query failed:0x%x\r\n", status);
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break;
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}
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printf("\r\nDNS Query successful\r\n");
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printf("\r\nIP address = %d.%d.%d.%d\r\n", dns_ip.ip.v4.bytes[0],
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dns_ip.ip.v4.bytes[1], dns_ip.ip.v4.bytes[2], dns_ip.ip.v4.bytes[3]);
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while (ping_count < PING_PACKETS) {
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status = sl_si91x_send_ping(dns_ip, PING_PACKET_SIZE);
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if (status != SL_STATUS_IN_PROGRESS) {
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printf("\r\nPing request failed with status 0x%X\r\n",
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status);
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return;
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}
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ping_count++;
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k_sleep(K_MSEC(1000));
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}
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return;
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} break;
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}
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}
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}
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static void wifi_mgmt_event_handler(struct net_mgmt_event_callback *cb, uint32_t mgmt_event,
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struct net_if *iface)
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{
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switch (mgmt_event) {
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case NET_EVENT_WIFI_CONNECT_RESULT:
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handle_wifi_connect_result(cb);
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break;
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case NET_EVENT_WIFI_DISCONNECT_RESULT:
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break;
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default:
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break;
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}
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}
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static void handle_wifi_connect_result(struct net_mgmt_event_callback *cb)
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{
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const struct wifi_status *status = (const struct wifi_status *)cb->info;
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int st = status->status;
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if (st) {
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if (st < 0) {
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/* Errno values are negative, try to map to
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* wifi status values.
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*/
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if (st == -ETIMEDOUT) {
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st = WIFI_STATUS_CONN_TIMEOUT;
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}
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}
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printf("Connection request failed (%s/%d)\n", wifi_conn_status_txt(st), st);
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state = SIWX91X_WIFI_CONNECT_STATE;
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} else {
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printf("Connected to Wi-Fi\n");
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state = SIWX91X_IP_CONFIG_STATE;
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}
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context.connecting = false;
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k_sem_give(&wlan_sem);
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}
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static sl_status_t network_event_handler(sl_net_event_t event, sl_status_t status, void *data,
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uint32_t data_length)
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{
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UNUSED_PARAMETER(data_length);
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switch (event) {
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case SL_NET_PING_RESPONSE_EVENT: {
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sl_si91x_ping_response_t *response = (sl_si91x_ping_response_t *)data;
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if (status != SL_STATUS_OK) {
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printf("\r\nPing request failed!\r\n");
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return status;
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}
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printf("\n%u bytes received from %u.%u.%u.%u\n", response->ping_size,
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response->ping_address.ipv4_address[0],
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response->ping_address.ipv4_address[1],
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response->ping_address.ipv4_address[2],
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response->ping_address.ipv4_address[3]);
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break;
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}
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default:
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break;
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}
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return SL_STATUS_OK;
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}
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int main(void)
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{
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struct net_mgmt_event_callback wifi_mgmt_cb;
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struct net_mgmt_event_callback mgmt_cb;
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struct k_thread wifi_task_handle;
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printf("siwx91x sample application for ICMP\r\n");
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net_mgmt_init_event_callback(&wifi_mgmt_cb, wifi_mgmt_event_handler,
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(WIFI_SHELL_MGMT_EVENTS));
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net_mgmt_add_event_callback(&wifi_mgmt_cb);
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net_mgmt_init_event_callback(&mgmt_cb, dhcp_callback_handler, NET_EVENT_IPV4_ADDR_ADD);
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net_mgmt_add_event_callback(&mgmt_cb);
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k_tid_t application_tid = k_thread_create(&wifi_task_handle, wifi_stack, STACK_SIZE,
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(k_thread_entry_t)application_start, NULL, NULL,
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NULL, K_PRIO_PREEMPT(10), 0, K_NO_WAIT);
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k_thread_start(application_tid);
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k_thread_join(application_tid, K_FOREVER);
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printf("\r\nApplication exit\r\n");
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return 0;
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}

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