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81 lines
1.6 KiB
Markdown
81 lines
1.6 KiB
Markdown
# _GPIO Example_
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_This test code shows how to configure gpio and how to use gpio interrupt._
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## GPIO functions
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* GPIO15: output
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* GPIO16: output
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* GPIO4: input, pulled up, interrupt from rising edge and falling edge
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* GPIO5: input, pulled up, interrupt from rising edge.
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## How to use example
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### Hardware Required
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* Connect GPIO15 with GPIO4
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* Connect GPIO16 with GPIO5
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### Configure the project
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```
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make menuconfig
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```
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* Set serial port under Serial Flasher Options.
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### Build and Flash
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Build the project and flash it to the board, then run monitor tool to view serial output:
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```
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make -j4 flash monitor
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```
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
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## Example Output
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* Generate pulses on GPIO15/16, that triggers interrupt on GPIO4/5
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```
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I (0) gpio: GPIO[15]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
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I (0) gpio: GPIO[16]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
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I (0) gpio: GPIO[4]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:1
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I (0) gpio: GPIO[5]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:1
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I (0) main: cnt: 0
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I (1) main: cnt: 1
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I (1) main: GPIO[4] intr, val: 1
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I (1) main: GPIO[5] intr, val: 1
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I (2) main: cnt: 2
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I (2) main: GPIO[4] intr, val: 0
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I (3) main: cnt: 3
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I (3) main: GPIO[4] intr, val: 1
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I (3) main: GPIO[5] intr, val: 1
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I (4) main: cnt: 4
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I (4) main: GPIO[4] intr, val: 0
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I (5) main: cnt: 5
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I (5) main: GPIO[4] intr, val: 1
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I (5) main: GPIO[5] intr, val: 1
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I (6) main: cnt: 6
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I (6) main: GPIO[4] intr, val: 0
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```
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