Jorjin SD/COM transfer board

Hi Sesh,

I suggest that you try this on the Jorjin website.

Regards,
Gigi Joseph.

Hello, everyone,

I have the same board and wl1837 module. Can anyone provide me its data sheet (wg7xxxT03-PCB-D01)

Are the two jumpers for WLAN_EN and WLAN_IRQ pins? If yes, please tell me which one is WLAN Enable and WLAN IRQ in particular.

Hi Amna,

The blue wire is WL_EN and the white WL_IRQ. You also need to remove R19 so that WL_EN is not driven on adapter board by Vcc.

Iain

Thanks a lot for the information Iain. I really appreciate your quick response.

Hello lain,

I have one question relating WLAN_EN pin. In your reply, you have told to open jumper R19 for controlling WLAN_EN pin but I guess , to control WLAN_EN pin , there are some other settings too since I am unable to control WLAN_EN pin via GPIO pin of twrvf65gs10, although the output on GPIO pin is being correctly measured via digital multimeter. GPIO pin controlling WLAN_EN pin is showing correct voltage but when it is connected with WLAN_EN pin on JORJIN module after opering R19 jumper, Wilink8 card is unable to get detected. I have to close the jumper R19 to work with Wilink8 card via JORJIN WG7XXX module. This causes limitation in controlling WLAN_EN pin for power on/off of the WLAN module.

Thanks

Amna

Amna,

The key thing from a WiLink8 point of view is that the WL_EN signal must be driven high by a GPIO after the VBat line has gone high and after the 32k clock is active. This is required for the WiLink8 to detect the WL_EN going high.

See diagram in section 5.12.2 of datasheet http://www.ti.com/product/WL1835MOD/datasheet/specifications#SWRS1526759

Typically this is done via the device tree file using a fixed_regulator structure to drive the GPIO when the MMC device driver is loaded as this ensures there is a delay after power and clock is applied. See http://e2e.ti.com/support/wireless_connectivity/f/307/p/356133/1309947.aspx#1309947  for details from i.Mx6.

Iain

Hello Iain,

I have a question regarding Wl18xx module reset via WLAN_EN pin. Actually, I am trying to load the firmware in PLT mode after normal booting of CHIP but the firmware hanged and no interrupt is received from the module. I have toggled WLAN_EN pin before loading firmware in PLT mode but after toggling the WLAN_EN pin, module is unable to do SDIO transactions. The log is as follows:

KERN_INFO: TIWLAN: 2.000000: Working on a 185x board.

KERN_INFO: TIWLAN: 2.000000: *******************************************

KERN_INFO: TIWLAN: 2.000000: wl18xx HW: RDL 183x or 180x, PG 2.2 (ROM 0x11)

KERN_INFO: TIWLAN: 2.000000: *******************************************

KERN_INFO: TIWLAN: 2.000000:

                              ****** ClockConfig=0x200 *****

KERN_INFO: TIWLAN: 2.000000:

                              ****** clock_config_freq=0x5 *****

KERN_INFO: TIWLAN: 2.000000:

                              ****** enable both PLLs (WCS and COEX) in the top *****

KERN_INFO: TIWLAN: 2.000000:

                              ****** disable the COEX PLL in the top *****

KERN_INFO: TIWLAN: 2.000000:

                              ****** Locking the PLL *****

KERN_INFO: TIWLAN: 2.000000: Finished downloading firmware.

KERN_INFO: TIWLAN: 2.000000: Firmware running in PLT mode.

At this point, firmware hangs and keeps on waiting for interrupt to be received from the module.

I looked  into the wiki documents of PLT mode of Wl18xx module and found that WLAN_EN pin needs to be reset ( 0 -> 1 ) before enabling PLT mode.

But after toggling the state of WLAN_EN pin,  SDIO bus is unable to do transactions :

KERN_INFO: TIWLAN: 33.000000: SdioBusDrv              , ERROR

busDrv_ConnectBus: Status = 0xffffffe4, BlkSize = 256

                                                     KERN_INFO: TIWLAN: 33.000000: Try to SDBus Connect again...

KERN_INFO: TIWLAN: 34.000000: SdioBusDrv              , ERROR

busDrv_ConnectBus: Status = 0xffffffe4, BlkSize = 256

                                                     KERN_INFO: TIWLAN: 34.000000: Try to SDBus Connect again...

KERN_INFO: TIWLAN: 34.000000: SdioBusDrv              , ERROR

busDrv_ConnectBus: Status = 0xffffffe4, BlkSize = 256

                                                     KERN_INFO: TIWLAN: 34.000000: Try to SDBus Connect again...

 Can you tell the what should be done in order to reset the WLAN module so that firmware is loaded successfully but keep the SDIO settings which had been done during initialization.

Thanks

Amna