i.MX RT Crossover MCUsのトピックRe: SDK example for WICED based M.2 WiFi

SDK example for WICED based M.2 WiFi

mspenard603 — Fri, 24 May 2019 15:20:36 GMT

Hi All,

I'm trying out the "evkmimxrt1060_wiced_iperf" example project for M.2 based WiFi. I notice it builds with FreeRTOS. I'd like to not use an RTOS in my code-base. Does the WICED M.2 WiFi code require RTOS? Is there an easy way to exclude it? Is there some #ifdef or compiler #symbol I'm not noticing to do so?

Thank you

Re: SDK example for WICED based M.2 WiFi

kerryzhou — Tue, 28 May 2019 08:59:26 GMT

Hi Mike Spenard,

Yes, the evkmimxrt1060_wiced_iperf SDK examples is based on the amazon freertos, this project can't be selected as none freertos.

You can find, even the wifi driver, also have the freertos code, so, the SDK wifi project code is mixed with freertos.

We still don't have the baremetal code for wiced based m.2 wifi.

Have a great day,
Kerry

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

Re: SDK example for WICED based M.2 WiFi

mspenard603 — Tue, 28 May 2019 11:57:04 GMT

Thanks Kerry. I understand, as M.2 WiFi is new to the April SDK 2.5.1 release. Do you know if conventional bare-metal drivers are on the horizon?

Re: SDK example for WICED based M.2 WiFi

kerryzhou — Wed, 29 May 2019 03:06:23 GMT

Hi Mike Spenard,

As I know, there no bare-metal plan, but I will help you to transfer your requirement to our according department when we collect the SDK suggestions.

Have a great day,
Kerry

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

Re: SDK example for WICED based M.2 WiFi

mspenard603 — Wed, 29 May 2019 12:25:23 GMT

Hi Kerry,

That would be great. As I'd like to add this M.2 interface to our product. If they could cook up conventional drivers in a few months that would be very helpful. I assume the Cypress WICED SDK has something further they could use as a starting point(?).

Re: SDK example for WICED based M.2 WiFi

kerryzhou — Thu, 30 May 2019 05:48:31 GMT

Hi Mike,

In my opinion, you also can try to learn our SDK code with freertos, then try to modify the wifi driver without the freertos, because, even I post your suggest, I am not sure it is acceptable, and the bare-metal for wifi code is not guaranteed.

About the Cypress WICED SDK, you also can check it with cypress, whether their side have the according bare-metal driver or not.

Have a great day,
Kerry

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

Re: SDK example for WICED based M.2 WiFi

mspenard603 — Wed, 05 Jun 2019 16:02:40 GMT

Understood...subsequent question... What other WiFi interface options do I have?

Re: SDK example for WICED based M.2 WiFi

kerryzhou — Thu, 06 Jun 2019 02:02:15 GMT

Hi Mike,

Do you mean WICED M.2 WiFi interface?

It's better to check that wifi module datasheet, you can find that module datasheet from the wifi module company's website.

Have a great day,
Kerry

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

Re: SDK example for WICED based M.2 WiFi

mspenard603 — Thu, 06 Jun 2019 11:54:48 GMT

No no, I mean in general. What other WiFi interface options do I have with the iMXRT? Any that don't require an RTOS?

Re: SDK example for WICED based M.2 WiFi

carstengroen — Thu, 06 Jun 2019 12:00:52 GMT

Mike,

I don't know if it is of any help or not, but I'm using ATWINC1510 module together with LwIP (on multiple NXP platforms). The ATWINC1510 has a passthru mode that lets it interface very nicely with LwIP.

Just a headsup if you look for something else.

Re: SDK example for WICED based M.2 WiFi

mspenard603 — Thu, 06 Jun 2019 12:04:32 GMT

Ooo that sounds promising.... Who makes this part?

Re: SDK example for WICED based M.2 WiFi

carstengroen — Thu, 06 Jun 2019 12:07:59 GMT

Sorry, its ATWINC1510 (and not WILC....).

And a headsup, you want the version with firmware 19.6.1 (this is a orderable part)

Do a search, not sure about policies here about mentioning other vendors :smileywink:

Otherwise, shoot me a PM

Re: SDK example for WICED based M.2 WiFi

mspenard603 — Thu, 06 Jun 2019 12:29:59 GMT

Ah, found it. Any details or code snippets on LWIP integration with its SPI(?) drivers?

Re: SDK example for WICED based M.2 WiFi

carstengroen — Thu, 06 Jun 2019 12:39:18 GMT

Mike,

some random stuff from one of my projects:

Init of Wifi and LwIP:

 
 tstrWifiInitParam param;
 tstrEthInitParam ethParam;
 int8_t ret;

 memset((uint8_t *)&param, 0, sizeof(tstrWifiInitParam));
 memset((uint8_t *)&ethParam, 0, sizeof(tstrEthInitParam));



 //startWShark("wifi.pcap", LINKTYPE_ETHERNET);
 //startWShark("wifi.pcap", LINKTYPE_RAW);

 ethParam.pfAppEthCb = winc_netif_rx_callback;
 ethParam.au8ethRcvBuf = rx_buf;
 ethParam.u16ethRcvBufSize = PBUF_POOL_BUFSIZE - ETH_PAD_SIZE;
 ethParam.u8EthernetEnable = 1; //For bypassing the TCPIP Stack of WINC
 
 param.strEthInitParam = ethParam;


 // Initialize Wi-Fi driver with data and status callbacks
 param.pfAppWifiCb = wifi_cb;
 nm_bsp_init();

 ret = m2m_wifi_init(&param);
 if (M2M_SUCCESS != ret) {
  messageDebug(DBG_INFO, __MODULE__, __LINE__, "m2m_wifi_init() call error!(%d)", ret);
  os_tsk_delete_self();
 }
 
 OS_WAIT(500);

 messageDebug(DBG_INFO, __MODULE__, __LINE__, "Chip ID : 0x%08X", (unsigned int)nmi_get_chipid());
 messageDebug(DBG_INFO, __MODULE__, __LINE__, "RF Revision ID : 0x%08X", (unsigned int)nmi_get_rfrevid());
 
 uint8_t u8IsMacAddrValid;
 uint8_t mac_addr[M2M_MAC_ADDRES_LEN];
 // Get MAC Address from OTP memory
 m2m_wifi_get_otp_mac_address( (uint8_t *)mac_addr, &u8IsMacAddrValid);
 if (!u8IsMacAddrValid) {
  // Cannot find MAC Address from OTP. Set user define MAC address
  messageDebug(DBG_ERR, __MODULE__, __LINE__, "No valid MAC address!");
 } else {
  // Note - Address should be read from LSB to MSB
  messageDebug(DBG_INFO, __MODULE__, __LINE__, "MAC address: %02X:%02X:%02X:%02X:%02X:%02X", mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], mac_addr[4], mac_addr[5]);
 } 
 
 
 
 // Need to protect this
 sys_lock_tcpip_core();
 /* Add WINC1500 STA interface. */
 netif_add(&winc_netif_sta, &ip_addr, &ip_addr, &ip_addr, 0, cbInitNetIF, tcpip_input);
// netif_set_default(&winc_netif_sta);
 setDefaultNetIFWifiHandler();
 netif_set_status_callback(&winc_netif_sta, cbWifiNetIFStatus);
 netif_set_link_callback(&winc_netif_sta, cbWifiLinkStatus);
 
 netbiosns_init();
 netbiosns_set_name("Peacock");
 sys_unlock_tcpip_core();

‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Loop passing packets to Wifi device:

  // Handle pending events from network controller
  if (os_sem_wait(semWiFi, 1) != OS_R_TMO)
   m2m_wifi_handle_events(NULL);

  // Needs to be changed to sem/etc
  if (gTX) {
   extern unsigned char tx_buf[];
   ret = m2m_wifi_send_ethernet_pkt(tx_buf, gTX);   
   if (M2M_SUCCESS == ret) {
    //messageDebug(DBG_INFO, __MODULE__, __LINE__, "ETH data transmit, length=%i", gTX);
   } else {
    messageDebug(DBG_ERR, __MODULE__, __LINE__, "Could NOT ETH data transmit, length=%i", gTX);
   }
   gTX=0;
  }
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Callback function for handling packets from WiFi device (and sending them into LwIP:

//---------------------------------------------------------------------------------------
// Receive packets from the winc under HIF thread context.
//---------------------------------------------------------------------------------------
void winc_netif_rx_callback(uint8 msg_type, void * msg, void *ctrl_buf) {
 uint16_t sz;
 uint16_t rem;
 struct pbuf *p;
 uint8_t *b;
 tstrM2mIpCtrlBuf *ctrl = (tstrM2mIpCtrlBuf *)ctrl_buf;

 
 if (msg_type == M2M_WIFI_RESP_ETHERNET_RX_PACKET) {
  
  sz = ctrl->u16DataSize;
  rem = ctrl->u16RemainingDataSize;

  if (sz > sizeof(rx_buf)) {
   messageDebug(DBG_ERR, __MODULE__, __LINE__, "ETH data received, length=%i", sz);
   // Reload memory buffer for further incoming packets
   m2m_wifi_set_receive_buffer(rx_buf, sizeof(rx_buf));
   return;
  } else {
  // messageDebug(DBG_INFO, __MODULE__, __LINE__, "ETH data received, length=%i", sz);
  }

  
  if (!rx_first) {
   rx_first = rx_last = pbuf_alloc(PBUF_RAW, PBUF_POOL_BUFSIZE, PBUF_POOL);
   if (rx_first == NULL) {
    LINK_STATS_INC(link.memerr);
    LINK_STATS_INC(link.drop);
    m2m_wifi_set_receive_buffer(rx_buf, sizeof(rx_buf));
    return;
   }
   memcpy(((uint8_t *)rx_first->payload) + ETH_PAD_SIZE, rx_buf, sz);
  }
  p = pbuf_alloc(PBUF_RAW, PBUF_POOL_BUFSIZE, PBUF_POOL);
  if (rx_first == rx_last) {
#if ETH_PAD_SIZE
   sz += ETH_PAD_SIZE;
#endif // #if ETH_PAD_SIZE
   rx_last->tot_len = sz + rem;
  }
  rx_last->len = sz;
  
 
  // When packet is complete, send it to the right lwIP interface
  if (!rem) {
   if (ERR_OK != winc_netif_sta.input(rx_first, &winc_netif_sta)) {
    pbuf_free(rx_first);
   } else
    newPBufRecordWShark(rx_first);

   LINK_STATS_INC(link.recv);
   rx_first = p;   
  } else {
   if (!p) {
    if (rx_first)
     pbuf_free(rx_first);
    rx_first = 0;
    LINK_STATS_INC(link.memerr);
    LINK_STATS_INC(link.drop);
    // Reload memory buffer for further incoming packets
    m2m_wifi_set_receive_buffer(rx_buf, sizeof(rx_buf));
    return;
   } else {
    p->tot_len = rem;
    rx_last->next = p;
   }
  }
  rx_last = p;
  if (rx_first == rx_last) {
   sz = PBUF_POOL_BUFSIZE - ETH_PAD_SIZE;
   if (rx_first) {
    b = ((uint8_t *)p->payload) + ETH_PAD_SIZE;
   } else {
    b = rx_buf;
   }
  } else {
   b = p->payload;
   sz = PBUF_POOL_BUFSIZE;
  }
  /* Reload memory buffer for further incoming packets. */
  m2m_wifi_set_receive_buffer(b, sz);
 }
}
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Again, this is only snippets from the code, its relatively complex to setup, but once done, its working very nicely!

You need to make the BSP layers for the ATWINC device, this is also relatively simple to do.

Regards,

Carsten

Re: SDK example for WICED based M.2 WiFi

mspenard603 — Thu, 06 Jun 2019 13:21:42 GMT

Very good, thank you. I'll order up a ATWINC1500 breakout board module. Unsure on how to order with said firmware rev. Datasheet mentions "Wi-Fi® Direct (supported till firmware release 19.5.2)". Is this the "passthru" feature you mean?

What does your pin-config and clocking setup look like?

Re: SDK example for WICED based M.2 WiFi

carstengroen — Thu, 06 Jun 2019 13:30:24 GMT

Mike,

this is the module: https://dk.farnell.com/microchip/atwinc1510-mr210pb1961/smartconnect-iot-module-2-4ghz/dp/2932046

Parntnumber is ATWINC1510-MR210PB1961.

This identifies it as firmware 19.6.1. It all depends on the version of the library you will be using for the module, I'm running with a version that uses 19.6.1 (I can send that to you if needed, it has BSP layer for a LPC1788).

If you don't get a module with the firmware version as supported by the library, you have to update the WiFi module so it matches (which is kind of tiresome). We always order the 19.6.1, this works fine.

(I have also a couple of projects that uses the ATWINC1510 natively with the library for it (without LwIP), it supports sockets, UDP etc and is a fine solution for a simple application, without all the code from LwIP.

I have not the ATWINC on a RT device just yet, but threre is no problems doing so, you just need a SPI port and a couple of GPIO (reset, enable etc)

Below is a snippet from one of my schematics with the ATWINC1510:

Re: SDK example for WICED based M.2 WiFi

mspenard603 — Thu, 06 Jun 2019 14:54:32 GMT

Ah, very good. 1961 after the PB. Digikey wasn't showing me that by default.

What is the library you mention? Feel free to send my way or a link (I assume this is a Microchip library..?).

Thank you, you've been very helpful.

Re: SDK example for WICED based M.2 WiFi

carstengroen — Thu, 06 Jun 2019 14:56:05 GMT

Mike, I have sent you a PM :smileyhappy:

Re: SDK example for WICED based M.2 WiFi

mspenard603 — Thu, 06 Jun 2019 15:39:37 GMT

I found the Microchip doc on all this:
http://ww1.microchip.com/downloads/en/AppNotes/70005333A.pdf

Which explains many of the calls in your code beyond LWIP's netif_add() I recognized right away.

I'm wondering now how I get the correct "Host Driver Software" for iMXRT and MCUxpresso....???

Re: SDK example for WICED based M.2 WiFi

carstengroen — Thu, 06 Jun 2019 16:17:16 GMT

Mike,

I have sent you most of what you need. You "just" need to adapt the BSP files in the library to use the SPI/GPIO/IRQ on the RT.