Intermediate
30 min
0

Experience the convenience of wireless networking with ATWINC3400-MR210CA and PIC32MX795F512L

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WiFi 8 Click with EasyPIC Fusion v7

Published Jul 29, 2023

Click board™

WiFi 8 Click

Development board

EasyPIC Fusion v7

Compiler

NECTO Studio

MCU

PIC32MX795F512L

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Hardware Overview

How does it work?

WiFi 8 Click is based on the ATWINC3400-MR210CA, an RF/Baseband/Medium Access Control (MAC) network controller (Bluetooth 5.0 certified module) optimized for low-power and high-performance mobile applications from Microchip Technology. The ATWINC3400-MR210CA supports the simultaneous use of Bluetooth Low Energy and WiFi via a coexistence mechanism, allowing them to share the same radio. The radio defaults to WiFi use until a Bluetooth Low Energy event occurs, in which case the radio is switched over for Bluetooth Low Energy use. It comes with integrated power and low-noise amplifiers, transmit/receive switch (for WiFi and Bluetooth), a power management unit, an integrated 2.4GHz chip antenna, and an additional 32.768 kHz clock to supply the module during Sleep mode. The ATWINC3400-MR210CA module has multiple device states (WiFi TX/RX, BLE TX/RX, Doze, and Power-Down Mode) based on the state of the IEEE 802.11 and Bluetooth subsystems with

the possibility for both subsystems to be active at the same time. It has two Cortus APS3 32-bit processors, one for WiFi and the other for Bluetooth. The APS3 core uses a 256KB instruction/boot ROM, 420KB instruction RAM, and 128KB data RAM. In addition, the module uses a 160KB shared/exchange RAM accessible by the processor and MAC, which allows the processor to perform various data management tasks on the TX and RX data packets. WiFi 8 Click communicates with MCU using the SPI serial interface with a maximum clock frequency of 48MHz applicable to all SPI modes. Additional functionality, such as the Chip Enable, is used to Enable or put the module in Shut-Down mode provided and routed at the EN pin of the mikroBUS™ socket. Alongside this pin, this Click board™ has a Reset button routed to the RST pin on the mikroBUS™ socket, which with a low logic level, puts the module into a Reset state and, with a high level, operates the module normally.

This Click board™ also has several additional headers suitable for debugging using the UART and I2C interfaces labeled DBG UART and DBG I2C. It also has a header marked GPIO with all general-purpose pins from the ATWINC3400-MR210CA module. It should be noted that the GPIO functionality is currently not supported by the ATWINC3400 firmware. Besides, it also has two additional LED indicators, red and yellow LEDs labeled STAT1 and STAT2, which can be used for optional user-configurable visual indication. This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.

WiFi 8 Click hardware overview image

Features overview

Development board

EasyPIC Fusion v7 is the seventh generation of PIC development boards specially designed to develop embedded applications rapidly. It supports a wide range of 16/32-bit PIC microcontrollers from Microchip and a broad set of unique functions, such as a powerful onboard mikroProg programmer and In-Circuit debugger over USB-B. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. With two different connectors for each port, EasyPIC Fusion v7 allows you to connect accessory boards, sensors, and custom electronics more efficiently than ever. Each part of

the EasyPIC Fusion v7 development board contains the components necessary for the most efficient operation of the same board. An integrated mikroProg, a fast USB 2.0 programmer with mikroICD hardware In-Circuit Debugger, offers many valuable programming/debugging options and seamless integration with the Mikroe software environment. Besides it also includes a clean and regulated power supply block for the development board. It can use a wide range of external power sources, including an external 12V power supply, 7-12V AC or 9-15V DC via DC connector/screw terminals, and a power source via the USB Type-B (USB-B) connector. Communication options such

as USB-UART, USB-HOST, CAN, and Ethernet are also included, including the well-established mikroBUS™ standard, one display option for the TFT board line of products, and a standard TQFP socket for the seventh-generation MCU cards. This socket covers a wide range of 16-bit dsPIC/PIC24 and 32-bit PIC32 MCUs. EasyPIC Fusion v7 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

EasyPIC Fusion v7 horizontal image

Microcontroller Overview

MCU Card / MCU

default

Type

7th Generation

Architecture

PIC32

MCU Memory (KB)

512

Silicon Vendor

Microchip

Pin count

100

RAM (Bytes)

131072

Used MCU Pins

mikroBUS™ mapper

Chip Enable
RB8
AN
Reset
RC1
RST
SPI Chip Select
RC2
CS
SPI Clock
RD15
SCK
SPI Data OUT
RF2
MISO
SPI Data IN
RF8
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
Interrupt
RE8
INT
NC
NC
TX
NC
NC
RX
NC
NC
SCL
NC
NC
SDA
NC
NC
5V
Ground
GND
GND
1

Take a closer look

Schematic

WiFi 8 Click Schematic schematic

Step by step

Project assembly

EasyMx PRO v7a for STM32 front image hardware assembly

Start by selecting your development board and Click board™. Begin with the EasyPIC Fusion v7 as your development board.

EasyMx PRO v7a for STM32 front image hardware assembly
Buck 22 Click front image hardware assembly
EasyMx PRO? v7 for STM32 MCUcard with STM32F407VGT6 front image hardware assembly
v7 TQFP 2SOC MB 1 - upright/background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
NECTO Compiler Selection Step Image hardware assembly
NECTO Output Selection Step Image hardware assembly
Necto image step 6 hardware assembly
EasyPIC PRO v7a MCU Selection Necto Step hardware assembly
EasyPIC PRO v7a Display Selection Necto Step hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto PreFlash Image hardware assembly

Track your results in real time

Application Output

After pressing the "FLASH" button on the left-side panel, it is necessary to open the UART terminal to display the achieved results. By clicking on the Tools icon in the right-hand panel, multiple different functions are displayed, among which is the UART Terminal. Click on the offered "UART Terminal" icon.

UART Application Output Step 1

Once the UART terminal is opened, the window takes on a new form. At the top of the tab are two buttons, one for adjusting the parameters of the UART terminal and the other for connecting the UART terminal. The tab's lower part is reserved for displaying the achieved results. Before connecting, the terminal has a Disconnected status, indicating that the terminal is not yet active. Before connecting, it is necessary to check the set parameters of the UART terminal. Click on the "OPTIONS" button.

UART Application Output Step 2

In the newly opened UART Terminal Options field, we check if the terminal settings are correct, such as the set port and the Baud rate of UART communication. If the data is not displayed properly, it is possible that the Baud rate value is not set correctly and needs to be adjusted to 115200. If all the parameters are set correctly, click on "CONFIGURE".

UART Application Output Step 3

The next step is to click on the "CONNECT" button, after which the terminal status changes from Disconnected to Connected in green, and the data is displayed in the Received data field.

UART Application Output Step 4

Software Support

Library Description

This library contains API for WiFi 8 Click driver.

Key functions:

  • wifi8_init_drv - Synchronous API to initialize the device driver

  • wifi8_connect - Asynchronous Wi-Fi connection function

  • wifi8_socket_bind - Asynchronous bind function associates the provided address and local port to the socket

Open Source

Code example

This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.

/*!
 * @file main.c
 * @brief WiFi8 Click example
 *
 * # Description
 * This application showcases capability of the WiFi 8 Click board. 
 * It initializes device, connects to local WiFi. Creates TCP, waits for connection
 * and logs every message it receives for clients when it receives CR or LF flag
 * it returns message back to Client.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes Host logger, and communication module and pins. 
 * Then resets device and initializes devices firmware. If no error
 * occurred it sets callback functions for WiFi and TCP socket, and checks
 * current firmware version. After firmware is read it connects to local WiFi network 
 * set by user. When connected it initializes and creates socket.
 *
 * ## Application Task
 * It loops function for handleing events. Should notify and log messages when Client
 * is connected/disconnected to TCP server and returns back when receives CR or LF flag.
 *
 * *note:*
 * User should set @b MAIN_WLAN_SSID and @b MAIN_WLAN_PSK for connecting to local network.
 * When devices connects to network it will log it's IP that user need to connect to.
 * After user connects it should get notification and it can send data to server. 
 * Server will return message "WiFi 8 Click" when Client sends CR or LF character in message.
 *
 * @author Luka Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "wifi8.h"

static wifi8_t wifi8;
static log_t logger;

/** Wi-Fi Settings */
#define MAIN_WLAN_SSID "MikroE Public"      /* < Destination SSID */
#define MAIN_WLAN_AUTH M2M_WIFI_SEC_WPA_PSK /* < Security type */
#define MAIN_WLAN_PSK "mikroe.guest"        /* < Password for Destination SSID */

typedef struct s_msg_wifi_product
{
    uint8_t name[30];

} t_msg_wifi_product;

static t_msg_wifi_product msg_wifi_product =
    {
        .name = "WiFi 8 Click",
};

static uint8_t gau8_socket_test_buffer[1024] = {0};

static int8_t tcp_server_socket = -1;
static int8_t tcp_client_socket = -1;
struct wifi8_sockaddr_in_t addr;

static uint8_t wifi_connected;

static uint8_t scan_request_index = 0;

static uint8_t num_found_ap = 0;

static void wifi_cb(uint8_t u8_msg_type, void *pv_msg);

static void socket_cb(int8_t sock, uint8_t u8_msg, void *pv_msg);

void application_init(void)
{
    log_cfg_t log_cfg;
    wifi8_cfg_t wifi8_cfg;

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info(&logger, " Application Init ");

    Delay_ms(1000);

    wifi8_cfg_setup(&wifi8_cfg);
    WIFI8_MAP_MIKROBUS(wifi8_cfg, MIKROBUS_1);
    err_t init_flag = wifi8_init(&wifi8, &wifi8_cfg);
    if (init_flag == SPI_MASTER_ERROR)
    {
        log_error(&logger, " Application Init Error. ");
        log_info(&logger, " Please, run program again... ");
        for (;;);
    }

    if (WIFI8_OK != wifi8_default_cfg(&wifi8))
    {
        log_error(&logger, " Default configuartion. ");
        for (;;); 
    }
    //Set callback functions for WiFi and TCP socket
    wifi8.app_wifi_cb = wifi_cb;
    wifi8.app_socket_cb = socket_cb;
    wifi_connected = M2M_WIFI_DISCONNECTED;

    wifi8_m2m_rev_t fw_version;
    if (WIFI8_OK == wifi8_get_full_firmware_version(&wifi8, &fw_version))
    {
        log_printf(&logger, "Firmware HIF (%u) : %u.%u \n", ((uint8_t)(((fw_version.u16_firmware_hif_info) >> (14)) & (0x3))), ((uint8_t)(((fw_version.u16_firmware_hif_info) >> (8)) & (0x3f))), ((uint8_t)(((fw_version.u16_firmware_hif_info) >> (0)) & (0xff))));
        log_printf(&logger, "Firmware ver   : %u.%u.%u \n", fw_version.u8_firmware_major, fw_version.u8_firmware_minor, fw_version.u8_firmware_patch);
        log_printf(&logger, "Firmware Build %s Time %s\n", fw_version.build_date, fw_version.build_time);
    }
    else
    {
        log_error(&logger, " reading full firmware version ");
        for (;;);
    }

    if (wifi_connected == M2M_WIFI_DISCONNECTED)
    {
        if (WIFI8_OK != wifi8_connect(&wifi8, MAIN_WLAN_SSID, sizeof(MAIN_WLAN_SSID), MAIN_WLAN_AUTH, MAIN_WLAN_PSK, M2M_WIFI_CH_ALL))
        {
            log_error(&logger, " Connection");
            for (;;);
        }
        else
        {
            log_info(&logger, " Connecting... ");
        }
    }

    while (wifi_connected != M2M_WIFI_CONNECTED)
    {
        wifi8_handle_events(&wifi8);
    }

    wifi8_socket_init(&wifi8);
    addr.sin_family = 2;
    addr.sin_port = (uint16_t)((((uint16_t)((6666))) << 8) | (((uint16_t)((6666))) >> 8));
    addr.sin_addr.s_addr = 0;

    log_info(&logger, " Application Task ");
}

void application_task(void)
{
    wifi8_handle_events(&wifi8);

    if (tcp_server_socket < 0)
    {

        if ((tcp_server_socket = wifi8_socket_create(&wifi8, 2, 1, 0)) < 0)
        {
            log_printf(&logger, "main: failed to create TCP server socket error!\r\n");
        }
        else
        {
            wifi8_socket_bind(&wifi8, tcp_server_socket, (struct wifi8_sockaddr_t *)&addr,
                              sizeof(struct wifi8_sockaddr_in_t));
        }
    }
}

void main(void)
{
    application_init();

    for (;;)
    {
        application_task();
    }
}

static void wifi_cb(uint8_t u8_msg_type, void *pv_msg)
{
    switch (u8_msg_type)
    {
        case M2M_WIFI_RESP_SCAN_DONE:
        {
            wifi8_m2m_scan_done_t *pstr_info = (wifi8_m2m_scan_done_t *)pv_msg;
            scan_request_index = 0;
            if (pstr_info->u8_numof_ch >= 1)
            {
                wifi8_req_scan_result(&wifi8, scan_request_index);
                scan_request_index++;
            }
            else
            {
                wifi8_request_scan(&wifi8, M2M_WIFI_CH_ALL);
            }

            break;
        }
        case M2M_WIFI_RESP_SCAN_RESULT:
        {
            wifi8_m2m_wifiscan_result_t *pstr_scan_result = (wifi8_m2m_wifiscan_result_t *)pv_msg;
            uint16_t demo_ssid_len;
            uint16_t scan_ssid_len = strlen((char *)pstr_scan_result->au8ssid);

            log_printf(&logger, "wifi_cb: [%d] SSID:%s\r\n", scan_request_index, pstr_scan_result->au8ssid);

            num_found_ap = wifi8.ch_num;
            if (scan_ssid_len)
            {
                demo_ssid_len = strlen((const char *)MAIN_WLAN_SSID);
                if ((demo_ssid_len == scan_ssid_len) &&
                    (!memcmp(pstr_scan_result->au8ssid, (uint8_t *)MAIN_WLAN_SSID, demo_ssid_len)))
                {
                    log_printf(&logger, "wifi_cb: found %s \r\n", MAIN_WLAN_SSID);
                    wifi8_connect(&wifi8, MAIN_WLAN_SSID, sizeof(MAIN_WLAN_SSID),
                                M2M_WIFI_SEC_WPA_PSK, MAIN_WLAN_PSK, M2M_WIFI_CH_ALL);
                    break;
                }
            }

            if (scan_request_index < num_found_ap)
            {
                wifi8_req_scan_result(&wifi8, scan_request_index);
                scan_request_index++;
            }
            else
            {
                log_printf(&logger, "wifi_cb: can not find AP %s\r\n", MAIN_WLAN_SSID);
                wifi8_request_scan(&wifi8, M2M_WIFI_CH_ALL);
            }

            break;
        }
        case M2M_WIFI_RESP_CON_STATE_CHANGED:
        {
            wifi8_m2m_wifi_state_changed_t *pstr_wifi_state = (wifi8_m2m_wifi_state_changed_t *)pv_msg;
            if (pstr_wifi_state->u8_curr_state == M2M_WIFI_CONNECTED)
            {
                log_printf(&logger, "wifi_cb: connected\r\n");
            }
            else if (pstr_wifi_state->u8_curr_state == M2M_WIFI_DISCONNECTED)
            {
                log_printf(&logger, "wifi_cb: disconnected\r\n");
                wifi_connected = M2M_WIFI_DISCONNECTED;

                wifi8_request_scan(&wifi8, M2M_WIFI_CH_ALL);
            }

            break;
        }
        case M2M_WIFI_REQ_DHCP_CONF:
        {
            volatile uint8_t *pu8ip_address = (uint8_t *)pv_msg;

            log_printf(&logger, "wifi_cb: IP: %u.%u.%u.%u\r\n",
                    pu8ip_address[0], pu8ip_address[1], pu8ip_address[2], pu8ip_address[3]);

            wifi_connected = M2M_WIFI_CONNECTED;
            break;
        }
        default:
        {
            break;
        }
    }
}

static void socket_cb(int8_t sock, uint8_t u8_msg, void *pv_msg)
{
    switch (u8_msg)
    {
        case SOCKET_MSG_BIND:
        {
            wifi8_socket_bind_msg_t *pstr_bind = (wifi8_socket_bind_msg_t *)pv_msg;
            if (pstr_bind && pstr_bind->status == 0)
            {
                log_printf(&logger, "socket_cb: bind success!\r\n");
                Delay_ms(500);
                wifi8_socket_listen(&wifi8, tcp_server_socket, 0);
            }
            else
            {
                log_printf(&logger, "socket_cb: bind error!\r\n");
                wifi8_socket_close(&wifi8, tcp_server_socket);
                tcp_server_socket = -1;
            }
        }
        break;
        case SOCKET_MSG_LISTEN:
        {
            wifi8_socket_listen_msg_t *pstr_listen = (wifi8_socket_listen_msg_t *)pv_msg;
            if (pstr_listen && pstr_listen->status == 0)
            {
                log_printf(&logger, "socket_cb: listen success!\r\n");
            }
            else
            {
                log_printf(&logger, "socket_cb: listen error!\r\n");
                wifi8_socket_close(&wifi8, tcp_server_socket);
                tcp_server_socket = -1;
            }
        }
        break;
        case SOCKET_MSG_ACCEPT:
        {
            wifi8_socket_accept_msg_t *pstr_accept = (wifi8_socket_accept_msg_t *)pv_msg;
            if (pstr_accept)
            {
                log_printf(&logger, "socket_cb: accept success!\r\n");
                tcp_client_socket = pstr_accept->sock;
                wifi8_socket_receive(&wifi8, tcp_client_socket, gau8_socket_test_buffer, sizeof(gau8_socket_test_buffer), 0);
            }
            else
            {
                log_printf(&logger, "socket_cb: accept error!\r\n");
                wifi8_socket_close(&wifi8, tcp_server_socket);
                tcp_server_socket = -1;
            }
        }
        break;
        case SOCKET_MSG_SEND:
        {
            log_printf(&logger, "socket_cb: send success!\r\n");
            wifi8_socket_receive(&wifi8, tcp_client_socket, gau8_socket_test_buffer, sizeof(gau8_socket_test_buffer), 0);
        }
        break;
        case SOCKET_MSG_RECV:
        {
            wifi8_socket_recv_msg_t *pstr_recv = (wifi8_socket_recv_msg_t *)pv_msg;
            if (pstr_recv && pstr_recv->s16_buffer_size > 0)
            {
                log_printf(&logger, "%s", pstr_recv->pu8_buffer);
                if ((strchr(pstr_recv->pu8_buffer, 13) != 0) || (strchr(pstr_recv->pu8_buffer, 10) != 0))
                {
                    wifi8_socket_send(&wifi8, tcp_client_socket, &msg_wifi_product, sizeof(t_msg_wifi_product));
                }
                else
                {
                    wifi8_socket_receive(&wifi8, tcp_client_socket, gau8_socket_test_buffer, sizeof(gau8_socket_test_buffer), 0);
                }
                memset(pstr_recv->pu8_buffer, 0, pstr_recv->s16_buffer_size);
            }
            else
            {
                log_printf(&logger, "socket_cb: close socket!\r\n");
                wifi8_socket_close(&wifi8, tcp_server_socket);
                tcp_server_socket = -1;
            }
        }
        break;
        default:
        {
            break;
        }
    }
}

// ------------------------------------------------------------------------ END

Additional Support

Resources