1. Introducción medioambiental
Sistema operativo: ubuntu18.04 64 bit
Dos, escribe Makefile (PC)
Primero ingrese el comando uname -r para ver la versión actual del sistema.
root@wbyq:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# uname -r
5.3.0-40-generic
Compruebe si existe la ruta del kernel del sistema:
root@wbyq:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# ls /usr/src/
linux-headers-5.3.0-40 linux-headers-5.4.0-53-generic linux-hwe-5.4-headers-5.4.0-47
linux-headers-5.3.0-40-generic linux-hwe-5.4-headers-5.4.0-42 linux-hwe-5.4-headers-5.4.0-48
linux-headers-5.4.0-48-generic linux-hwe-5.4-headers-5.4.0-45 linux-hwe-5.4-headers-5.4.0-53
Según la versión actual del sistema, determine la ruta correspondiente: /usr/src/linux-headers-5.3.0-40
root@wbyq:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# ls /usr/src/
linux-headers-5.3.0-40 linux-headers-5.4.0-53-generic linux-hwe-5.4-headers-5.4.0-47
linux-headers-5.3.0-40-generic linux-hwe-5.4-headers-5.4.0-42 linux-hwe-5.4-headers-5.4.0-48
linux-headers-5.4.0-48-generic linux-hwe-5.4-headers-5.4.0-45 linux-hwe-5.4-headers-5.4.0-53
root@wbyq:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# ls /usr/src/linux-headers-5.3.0-40
arch certs Documentation fs init Kbuild kernel Makefile net scripts sound ubuntu virt
block crypto drivers include ipc Kconfig lib mm samples security tools usr
El Makefile completo es el siguiente:
Linux_ADD=/usr/src/linux-headers-5.3.0-40-generic
app_dev:
make -C $(Linux_ADD) M=`pwd` modules clean
make -C $(Linux_ADD) M=`pwd` modules
gcc spectrometer_app.c -o app
obj-m +=spectrometer_usb_drv.o
Compilar e instalar la prueba:
root@wbyq:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# insmod spectrometer_usb_drv.ko
root@wbyq:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# modinfo spectrometer_usb_drv.ko
filename: /mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu/spectrometer_usb_drv.ko
license: GPL
author: xiaolong
srcversion: 40F0CA1A1C1E3BA787F1B57
alias: usb:v0661p294Bd*dc*dsc*dp*ic*isc*ip*in*
alias: usb:v148Fp5370d*dc*dsc*dp*ic*isc*ip*in*
depends:
retpoline: Y
name: spectrometer_usb_drv
vermagic: 5.3.0-40-generic SMP mod_unload
root@wbyq:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# rmmod spectrometer_usb_drv.ko Con respecto al problema de visualización del registro: el controlador normalmente usa printk para imprimir información de depuración en el terminal. Si el terminal actual no responde después de instalar el controlador, primero puede usar el comando dmesg para verificar si hay salida en el registro.
root@wbyq:/mnt/hgfs/linux-share-dir/linux_c/usb_dev_ubuntu# dmesg
[137747.993110] 总线名称:usb
[137747.993111] 端点号[0]:129
[137747.993111] 端点[0] 输入端点(设备到主机)
[137747.993112] 端点[0] 设备支持批量传输.
[137747.993112] 端点[0] 传输的数据大小:512
[137747.993112] probe:dev->bulk_in_endpointAddr=129
[137747.993113] 端点号[1]:1
[137747.993113] 端点[1] 输出端点(主机到设备)
[137747.993113] 端点[1] 设备支持批量传输.
[137747.993114] 端点[1] 传输的数据大小:512
[137747.993114] probe:dev->bulk_out_endpointAddr=1
[137747.993114] 端点号[2]:2
[137747.993115] 端点[2] 输出端点(主机到设备)
[137747.993115] 端点[2] 设备支持批量传输.
[137747.993115] 端点[2] 传输的数据大小:512
[137747.993115] 端点号[3]:3
[137747.993116] 端点[3] 输出端点(主机到设备)
[137747.993116] 端点[3] 设备支持批量传输.
[137747.993116] 端点[3] 传输的数据大小:512
[137747.993116] 端点号[4]:4
[137747.993116] 端点[4] 输出端点(主机到设备)
[137747.993117] 端点[4] 设备支持批量传输.
[137747.993117] 端点[4] 传输的数据大小:512
[137747.993157] USB光谱仪设备节点注册成功:/dev/spectrometer_usb_drv ,主设备号:10,次设备号:53
[137747.993173] usbcore: registered new interface driver spectrometer_usb_drv
Tres, por cierto, la forma de compilar el Makefile para el controlador de Linux integrado
Linux_ADD=/home/wbyq/work/linux-3.5/linux-3.5
app_dev:
make -C $(Linux_ADD) M=`pwd` modules clean
make -C $(Linux_ADD) M=`pwd` modules
cp *.ko /home/wbyq/project/ -fv
arm-linux-gcc spectrometer_app.c -o app
cp app /home/wbyq/project/ -fv
obj-m +=spectrometer_usb_drv.o