Difference between revisions of "How to use GPIO RK3568"
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| − | {| | + | == ROM-5880 == |
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| + | {| border="1" cellpadding="1" cellspacing="1" | ||
|- | |- | ||
| GPIO Number | | GPIO Number | ||
| Line 52: | Line 53: | ||
| Numeric Representation | | Numeric Representation | ||
|- | |- | ||
| − | | | + | | GPIO0 |
| − | | | + | | GPIO2_D0 |
| − | | | + | | 88 |
|- | |- | ||
| − | | | + | | GPIO1 |
| − | | | + | | GPIO2_D1 |
| − | | | + | | 89 |
|- | |- | ||
| − | | | + | | GPIO2 |
| − | | | + | | GPIO2_D2 |
| − | | | + | | 90 |
|- | |- | ||
| − | | | + | | GPIO3 |
| − | | | + | | GPIO2_D3 |
| − | | | + | | 91 |
|- | |- | ||
| − | | | + | | GPIO4 |
| − | | | + | | GPIO2_C6 |
| − | | | + | | 86 |
|- | |- | ||
| − | | GPIO6 | + | | GPIO5 |
| − | | | + | | GPIO3_A1 |
| − | | | + | | 97 |
| + | |- | ||
| + | | GPIO6 | ||
| + | | GPIO3_A7 | ||
| + | | 103 | ||
| + | |- | ||
| + | | GPIO7 | ||
| + | | GPIO3_B0 | ||
| + | | 104 | ||
| + | |- | ||
| + | | GPIO8 | ||
| + | | GPIO3_B1 | ||
| + | | 105 | ||
| + | |- | ||
| + | | GPIO9 | ||
| + | | GPIO3_B2 | ||
| + | | 106 | ||
| + | |- | ||
| + | | GPIO10 | ||
| + | | GPIO3_B3 | ||
| + | | 107 | ||
| + | |- | ||
| + | | GPIO11 | ||
| + | | GPIO3_B4 | ||
| + | | 108 | ||
|} | |} | ||
| − | |||
| − | |||
= Test = | = Test = | ||
Revision as of 02:22, 12 April 2023
Contents
Configuration
The RK3568 bank/bit notation for GPIOs must be formed as "GPIO<GPIO_bank>_<gpio_bit>"
The numeric value of GPIO is calculated as follows:
32 x (gpio_bank) + gpio_bit
gpio_bit : A0～A7 0-7 B0～B7 8-15 C0～C7 16-23 D0～D7 24-31
E.g. GPIO3_A0 becomes 96
RSB-4810
| GPIO Number | GPIO formed | Numeric Representation |
| GPIO1 |
GPIO3_A0 |
96 |
| GPIO2 |
GPIO3_A2 |
98 |
| GPIO3 |
GPIO3_A3 |
99 |
| GPIO4 |
GPIO3_A4 |
100 |
| GPIO5 |
GPIO3_A5 |
101 |
| GPIO6 |
GPIO3_A6 |
102 |
ROM-5880
| GPIO Number | GPIO formed | Numeric Representation |
| GPIO0 | GPIO2_D0 | 88 |
| GPIO1 | GPIO2_D1 | 89 |
| GPIO2 | GPIO2_D2 | 90 |
| GPIO3 | GPIO2_D3 | 91 |
| GPIO4 | GPIO2_C6 | 86 |
| GPIO5 | GPIO3_A1 | 97 |
| GPIO6 | GPIO3_A7 | 103 |
| GPIO7 | GPIO3_B0 | 104 |
| GPIO8 | GPIO3_B1 | 105 |
| GPIO9 | GPIO3_B2 | 106 |
| GPIO10 | GPIO3_B3 | 107 |
| GPIO11 | GPIO3_B4 | 108 |
Test
Here we take GPIO1 of 4810 as an example.
Export GPIO then you can use control GPIO from userr space through sysfs
Export GPIO1
# echo 96 > /sys/class/gpio/export
Set GPIO direction to in/out
# echo "out" > /sys/class/gpio/gpio96/direction
Set GPIO value 0/1 if GPIO pin define is output
# echo 1 > /sys/class/gpio/gpio96/value
Used as IRQ signal
Note:You have to configure GPIO to input
# echo "rising" > /sys/class/gpio/gpio96/edge
- rising: Trigger on rising edge
- falling: Trigger on falling edge
- both: Trigger on both edges
- none: Disable interrupt on both edges
Unexport GPIO1
# echo 96 > /sys/class/gpio/unexport
Test
GPIO1 and GPIO2 are taken as an example:
- Connect GPIO1 and GPIO2
- Export GPIO1 and GPIO2
# echo 96 > /sys/class/gpio/export # echo 98 > /sys/class/gpio/export
- Set GPIO 1 to output
# echo "out" > /sys/class/gpio/gpio96/direction
- Set GPIO 2 to input
# echo "in" > /sys/class/gpio/gpio98/direction
- Change GPIO1 to 1 and read GPIO2value
# echo 1 > /sys/class/gpio/gpio96/value # cat /sys/class/gpio/gpio98/value 1
- Change GPIO1 to 0 and read GPIO2 value
# echo 0 > /sys/class/gpio/gpio96/value # cat /sys/class/gpio/gpio98/value 0