ESP8266 Community Forum

- Wed Dec 03, 2014 10:02 am #3926 I don't see a method to change the pullup and pulldown configuration of the GPIOs.

Perhaps these can be added with additional constants to the gpio.mode() function.

5.1.1. PIN setting macro
 PIN_PULLUP_DIS(PIN_NAME)
Disable pin pull up
 PIN_PULLUP_EN(PIN_NAME)
Enable pin pull up
 PIN_PULLDWN_DIS(PIN_NAME)
Disable pin pull down
 PIN_PULLDWN_EN(PIN_NAME)
Enable pin pull down
 PIN_FUNC_SELECT(PIN_NAME, FUNC)
Select pin function
Example：PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12);
Use MTDI pin as GPIO12。

A use example is shown in erl's

https://github.com/nekromant/esp8266-frankenstein/blob/master/src/cmd_ds18b20.c

ESP8266 for dummies, LuaLoader and project updates: http://benlo.com/esp8266

- Sat Dec 06, 2014 5:40 pm #4154 You can have three states:

output 1 or 0

Code: Select allgpio.mode(8,gpio.OUTPUT)
gpio.write(8,gpio.HIGH)
gpio.write(8,gpio.LOW)

input with pullup

Code: Select allgpio.mode(9,gpio.INPUT)
gpio.write(9,gpio.HIGH)

input without pullup

Code: Select allgpio.mode(9,gpio.INPUT)
gpio.write(9,gpio.LOW)

Interesting will be how to get information is specific GPIO pin configured as INPUT or OUTPUT

- Sat Dec 06, 2014 11:52 pm #4169

I don't see a method to change the pullup and pulldown configuration of the GPIOs.

Perhaps these can be added with additional constants to the gpio.mode() function.

5.1.1. PIN setting macro
 PIN_PULLUP_DIS(PIN_NAME)
Disable pin pull up
 PIN_PULLUP_EN(PIN_NAME)
Enable pin pull up
 PIN_PULLDWN_DIS(PIN_NAME)
Disable pin pull down
 PIN_PULLDWN_EN(PIN_NAME)
Enable pin pull down
 PIN_FUNC_SELECT(PIN_NAME, FUNC)
Select pin function
Example：PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12);
Use MTDI pin as GPIO12。

A use example is shown in erl's

https://github.com/nekromant/esp8266-frankenstein/blob/master/src/cmd_ds18b20.c

Change log:
2014-12-07

1, add ow(1-wire module), from arduino, and use same api.

2, add an 18b20 1-wire example.

3, change net.socket.send() payload max len from 256 to 1460.

4, modify gpio.mode() api, add internal pullup/float para.

- Sun Dec 07, 2014 2:50 pm #4208

4, modify gpio.mode() api, add internal pullup/float para.

Thank you zeroday.

You are the best!

ESP8266 for dummies, LuaLoader and project updates: http://benlo.com/esp8266