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| − | {{rockpi4_header}}
| + | #redirect [[Rock4/hardware/gpio]] |
| − | {{Languages|rockpi4/hardware/gpio}}
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| − | [[rockpi4 | ROCK Pi 4]] > [[rockpi4/hardware | Hardware]] > [[rockpi4/hardware/gpio | GPIO]]
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| − | Rockchip RK3399 GPIO has 5 banks, GPIO0 to GPIO4, each bank has 32pins, naming as below:
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| − | GPIO0_A0 ~ A7
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| − | GPIO0_B0 ~ B7
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| − | GPIO0_C0 ~ C7
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| − | GPIO0_D0 ~ D7
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| − | GPIO1_A0 ~ A7
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| − | ....
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| − | GPIO1_D0 ~ D7
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| − | For Rockchip 4.4 kernel, the GPIO number can be calculated as below, take GPIO4_D5(PIN22 on 40PIN GPIO) as an example:
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| − | GPIO4_D5 = 32*4 + 8*3 + 5 = 157
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| − | To set GPIO4_D5 output
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| − | cd /sys/class/gpio
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| − | echo 157 > export
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| − | cd gpio157
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| − | echo out > direction
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| − | echo 1 > value # output high
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| − | echo 0 > value # output low
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