我这边测试了所有能配置成gpio的引脚,然后两两对测,发现有三个引脚无法正常控制输出高低电平,分别是:gpio0_68 、gpio0_69 、GPIO1_31
AM62X_IOPAD(0x114, PIN_INPUT, 7) /* (B24) GPIO0_68 */
AM62X_IOPAD(0x118, PIN_INPUT, 7) /* (D25) GPIO0_69 */
AM62X_IOPAD(0x1F4, PIN_OUTPUT, 7) /* (D16) GPIO1_31 */
其他都是可以的,就是这是三个不行,
root@ok6254:/sys/class/gpio# cat /sys/kernel/debug/gpio
gpiochip2: GPIOs 344-395, parent: platform/601000.gpio, 601000.gpio:
gpio-375 ( |led2 ) out lo
gpiochip1: GPIOs 396-487, parent: platform/600000.gpio, 600000.gpio:
gpio-432 ( |id ) in lo
gpio-434 ( |RT9186 ) out lo
gpio-435 ( |fixed-regulator-lvds) out lo
gpio-438 ( |heartbeat ) out lo
gpio-467 ( |led1 ) out lo
gpiochip0: GPIOs 488-511, parent: platform/4201000.gpio, 4201000.gpio:
root@ok6254:/sys/class/gpio# echo 464 >export
root@ok6254:/sys/class/gpio# echo out >gpio464/direction
root@ok6254:/sys/class/gpio# echo 1 >gpio464/value
root@ok6254:/sys/class/gpio# cat gpio464/value
0
root@ok6254:/sys/class/gpio#
您可以帮我看看这三个引脚有什么特殊的吗
sdk版本是08_03_00_19