Why it always gets assert on ESP-12E board when set IO9 to GPIO Mode

[sourse]

Hi,
As I know GPIO9 is always set to SDIO_DATA_2 by default. So I want to use it as GPIO mode. But when I set its fucntion select to GPIO mode the board always get assert. So I wonder why it happened. The sample codes are shown as blow:

PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_DATA2_U, FUNC_GPIO9); //it shows the program asserts at this line when debugging
PIN_PULLUP_DIS(PERIPHS_IO_MUX_SD_DATA2_U);

Thank a lot!

Best Wishes!
Sourse

[Espressif_Kelly]

Dear Source,

Please be noted that If you want to use SD_D2(SD_D3) as GPIO9 (GPIO10),you need to choose SPI mode as DIO or DOUT in flash download tool.

Besides, you need to disconnect SD_D2(SD_D3) from flash in hardware.

Please try again.

Any more questions, please let us know.

Thanks.

[sourse]

Hi Kelly,
Thanks for your kindly reply. So for the ESP-12E GPIO9/10 are used to add an another extra spi flash, is it right?
So how can I use GPIO16 with GPIO mode? Thanks a lot.

Best wishes,
Sourse

[sourse]

I saw the gpio16.c in the folder of driver. So I can use the file to config GPIO16 with GPIO mode if I don' t want to use it as deep sleep or other purposes, am I right?

Thanks!

Best regards,
Sourse

[Espressif_Kelly]

Dear Sir,

Yes, you can use XPD_DCDC(Pin8) as GPIO16.

Please refer to "8A_ESP8266_Interface_GPIO_EN_v0.5.pdf" at below link for details.

http://bbs.espressif.com/viewtopic.php?f=51&t=819

More questions, please feel free to let us know.

Thanks.

[rudi]

Dear Sir,

Yes, you can use XPD_DCDC(Pin8) as GPIO16.

Please refer to "8A_ESP8266_Interface_GPIO_EN_v0.5.pdf" at below link for details.

http://bbs.espressif.com/viewtopic.php?f=51&t=819

More questions, please feel free to let us know.

Thanks.

hi kelly

can u help please, where are the documents stored now?
we get a "The requested topic does not exist."
if we use the link.

thanks!
best wishes
rudi

btw:
do not find again the other peripherials docu too.
example: 8H-ESP8266__Interface_SDIO_SPI_Mode__EN_v0.1-2.pdf
was here: download/file.php?id=659

[rudi]

push

[ESP_Greg]

We put all information together. Please see
viewtopic.php?f=51&t=817