Thread Host Controlled Device over SPI instead of UART

[jc_pacheco]

From: alexwheeler‌

Any help would be appreciated getting SPI interface working.  

I found the following in the code:

/* SPI Slave Data Available Pin */

#define gSpiSlaveDap_Port_d   gpioPort_B_c

#define gSpiSlaveDap_Pin_d    1

So i'm guessing there is another connection I need to make from the FRDM-KW41Z to the GPIO on the RPI for the DAP signal?  Which pin would this be on the FRDM-KW41Z?

Thanks

[jc_pacheco · Accepted solution]

Hi Alex,

Some information available here: MKW41z connectivity software THCI interface over SPI  

As mentioned in the other thread, when enabling THCI over SPI you must take into account:

• Disable any other THCI configured interface

#define THCI_UART_ENABLE 0‍

• Select THCI over SPI interface

#define THCI_SPI_ENABLE  1‍

• Configure HCD SPI as master or slave
  See ".interfaceType" at 'static const gFsciSerialConfig_t mFsciSerials[]' at app_init.c

• Configure interface channel
  See ".interfaceChannel" at 'static const gFsciSerialConfig_t mFsciSerials[]' at app_init.c

• Configure GPIO pin name depending on the "Data Available" pin that you'll be using.
  Master or Slave, this depends on your setup. See gpio_pins.h

/* SPI Master Data Available Pin */
#define gSpiMasterDap_Port_d  gpioPort_B_c
#define gSpiMasterDap_Pin_d   1

/* SPI Slave Data Available Pin */
#define gSpiSlaveDap_Port_d   gpioPort_B_c
#define gSpiSlaveDap_Pin_d    1‍‍‍‍‍‍‍‍‍

Hope this helps.

Regards,

JC

[alexwheeler]

Hi Juan,

I'm really happy to have your help, I see in other threads you always find the solution.  Things are now 50% working (TX).  I'm also receiving data, however I think my DAP side of things isn't working yet on the RPI linux side.

My previous issue were the following:

I setup ".interfaceType" at 'static const gFsciSerialConfig_t mFsciSerials[]' at app_init.c - to be Slave (It was Master).

I Setup ".interfaceChannel" at 'static const gFsciSerialConfig_t mFsciSerials[]' at app_init.c - to be 0, it was 1.

------

 So now at-least, when running getaddr, I can see the led goes to green which means my network is setup.  I also see RX data dumped on the screen.  However when i'm running that command I receive many "No response for the previous command".

It must be I don't have the uio dev setup correctly in the dts file, so the /dev/uio0 is not functioning how it should be.

Do you have any examples I could follow?  Maybe you have a dts file I could see for iMX6?  I'm trying to make this for RPI3. 

Thanks in advance

Alex

[jc_pacheco]

Hi Alex,

There's a KW41Z maintenance release upcoming early Q1 2018. It will include a THCI over SPI example using the KW41Z with a DK07 AP as host.

-JC

[alexwheeler]

Hi JC,

That's great news, but still I will forge forwards to get this working on my setup using a RPI.  Actually i'm 80% there now.  When I run getaddr, it now does a factory reset, I get information about the board back.  It doesn't say no response for this section now.  And it creates a new network.  It also does not say no response for that.  However when it does the next step of ifconfig_all, I see a whole bunch of RX, but it fails there and says no response.

Does this still sound like an issue with the config of the DAP pin in Linux?  I configured it as a pull down (input) and make interrupt on RISING_EDGE.  Is that a correct assumption?  Is DAP high when data is available?

Thanks

Alex

[jc_pacheco]

Hi Alex,

I'm glad to see you are progressing with your development.

The data available pin transition type when slave has data to transmit is defined by gSerialMgrSlaveDapTxLogicOne_c.

It's currently configured at source/config.h

#if THCI_SPI_ENABLE
    #define gSerialMgrRxBufSize_c               (768)  /* required for large ICMP ECHO_REQUESTs (e.g. 1200) */
    #define gSerialMgrUseUart_c                 (0)
    #define gSerialMgrUseSPI_c                  (1)
    #define gSerialMgrUseFSCIHdr_c              (1)
    #define gSerialMgrSlaveDapTxLogicOne_c      (0)    //<-------
    #define gFsciTxAck_c                        (0)
    #define gFsciRxAck_c                        (0)
    #define gNvPendingSavesQueueSize_c          (64)
#endif‍‍‍‍‍‍‍‍‍‍

- JC