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连接 SPI LCD 时出现“spi0.0 探测失败，错误为 -16”错误

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连接 SPI LCD 时出现“spi0.0 探测失败，错误为 -16”错误

我有一台基于 arm 的计算机，装有 armbian 操作系统，还有一台 LCD，我想用 SPI 协议连接它。当我使用此命令时：

sudo modprobe fbtft_device custom name=fb_ili9341 gpios=reset:198,dc:201,led:6 speed=16000000 rotate=90 bgr=1

我收到此错误dmesg：

[   68.421997] fbtft_device:  SPI devices registered:
[   68.422019] fbtft_device:      spidev spi0.0 33000kHz 8 bits mode=0x00
[   68.422029] fbtft_device:  'fb' Platform devices registered:
[   68.422115] fbtft_device: Deleting spi0.0
[   68.422631] fbtft_device:  GPIOS used by 'fb_ili9341':
[   68.422648] fbtft_device:    'reset' = GPIO198
[   68.422656] fbtft_device:    'dc' = GPIO201
[   68.422662] fbtft_device:    'led' = GPIO6
[   68.422669] fbtft_device:  SPI devices registered:
[   68.422679] fbtft_device:      fb_ili9341 spi0.0 16000kHz 8 bits mode=0x00
[   68.433490] fb_ili9341 spi0.0: fbtft_request_gpios: gpio_request_one('reset'=198) failed with -16
[   68.433657] fb_ili9341: probe of spi0.0 failed with error -16

我在这里检查了错误编号http://lxr.free-electrons.com/source/include/uapi/asm-generic/errno-base.h#L15并且它说：Device or resource busy 但是引脚是免费的，更换引脚并不能解决问题！

我怎样才能解决这个问题？

答案1

#gpio_sunxi我确实在文件中注释了此行/etc/modules，问题解决了！

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