Hardware Rework for MIMXRT1060-EVKB and Direct Murata M.2 Module

[uzzzuuu]

Hello all,

I'm trying to run bluetooth demo application. The board is booted up, but if I enter [bt.init], it is not working. 

There might be some problem with initialization of bluetooth. 

I think I probably need to do hardware rework for my board, but there is no guide for RT1060-EVKB + Direct Murata M.2 Module in the documentation "Hardware Rework Guide for EdgeFast BT PAL".

Does the [RT1060-EVKB + Direct Murata M.2 module] require Hardware Rework?

Best regard,

Park

[weidong_sun]

Hello @uzzzuuu ,

See i.MXRT1060-EVKB schematic, you will know how to rework UART for Bluetooth on hardware.

From above schematic, we can see UART pins' corresponding relations to i.MXRT1060 pins.

I.MXRT1060 PINs              IOMUX                     Signals on M.2

GPIO_AD_B0_03 ------ >BT_UART_CTS ---- >BT_UART_CTS_1V8
GPIO_AD_B0_02 ------ >BT_UART_RTS ---- >BT_UART_RTS_1V8
GPIO_AD_B1_07 ------ >BT_UART_RXD ---->BT_UART_RXD_1V8
GPIO_AD_B1_06 ------ >BT_UART_TXD ---->BT_UART_TXD_1V8
GPIO_AD_B0_01 ----------------------------------> BT_WAKE_B_3V3

GPIO_AD_B1_04 ------ >BT_DEV_WAKE ---- >BT_DEV_WAKE_1V8

SO if you want to enable Bluetooth, you should re-configure above pins IOMUX for UART in SDK. 

Regards,

weidong

[uzzzuuu]

Hello weidong,

Thank you for your kind help.

I did hardware Rework on my board, and I tried to re-configure the pins IOMUX for UART in SDK, but I faced some problems.

I.MXRT1060 PINs              IOMUX                     Signals on M.2

GPIO_AD_B0_03 ------ >BT_UART_CTS ---- >BT_UART_CTS_1V8
GPIO_AD_B0_02 ------ >BT_UART_RTS ---- >BT_UART_RTS_1V8

I think that GPIO_AD_B0_03 & GPIO_AD_B0_02 are not able to use for BT_UART_CTS & BT_UART_RTS. 

I tried to do routing for LPUART3 signals. However I cannot find GPIO_AD_B0_03 & GPIO_AD_B0_02  in the list of routable pins of CTS_B & RTS_B

Do you think I'm doing in a wrong way to re-configure pins?

Best regards,

Park

[weidong_sun]

Hello @uzzzuuu ,

Sorry!

I confirmed it with internal team. 

On board, design purpose is use GPIO to emulate UART RTS & UART CTS. But the emulation has not been supported in SDK.

In SDK, we provided HCI UART hardware rework for cusotmers.

it's path is like below :

 F:\IMX-NFC-RT\iMXRT\RT1060\SDK-2.11_1\SDK_2_11_1_EVK-MIMXRT1060\docs\wireless\Bluetooth\Edgefast_bluetooth

Hardware Rework Guide for EdgeFast BT PAL.pdf

You can refer to it.

Regards,

weidong

[uzzzuuu]

Hello weidong,

Thank you for your prompt response

I looked into Hardware Rework Guide for EdgeFast BT PAL.pdf, 

but unfortunately, there is no guide for the combination of MIMXRT1060-EVKB and Direct Murata M.2 Module :'( 

I think probably it is omitted, Could you please check about this?

Best regards,

Park

[weidong_sun]

Hello @uzzzuuu ,

From the rework document, yes, it is not for M.2 interface, BUT provide a UART for Bluetooth.

Confirm it with internal team, IMXRT1060-EVKC version will be designed. hardware UART will be wired out to M.2 interface.

so currently, you will have to use other UART for your BT module.

Regards,

weidong

[uzzzuuu]

Hello weidong,

it means if I want to use M.2 interface for Bluetooth, I have to buy IMXRT1060-EVKC on the future?

(IMXRT1060-EVKB does not support) 

Best regards,

uzzzuuu