UART配置
查看原理图，确认管脚
从原理图可以确认，有串口UART3模块可以使用。
这里做了张图，方便以后对管脚。
sys_config.fex配置
[uart3]
uart3_used = 0
uart3_port = 3
uart3_type = 4
uart3_tx = port:PD23<4><1><default><default>
uart3_rx = port:PD24<4><1><default><default>
uart3_rts = port:PD25<4><1><default><default>
uart3_cts = port:PD26<4><1><default><default>
[uart3_suspend]
uart3_tx = port:PD23<7><1><default><default>
uart3_rx = port:PD24<7><1><default><default>
uart3_rts = port:PD25<7><1><default><default>
uart3_cts = port:PD26<7><1><default><default>
从代码看，UART3默认没有打开，我们只需要TX和RX双线串口。代码配置如下。
lemon@ubuntu:~/Develop/OrangePi_Lite2/lichee$ git diff tools/pack/chips/sun50iw6p1/configs/petrel-p1/sys_config.fex
diff --git a/lichee/tools/pack/chips/sun50iw6p1/configs/petrel-p1/sys_config.fex b/lichee/tools/pack/chips/sun50iw6p1/configs/petrel-p1/sys_config.fex
index ec266a9..5e1d76a 100755
--- a/lichee/tools/pack/chips/sun50iw6p1/configs/petrel-p1/sys_config.fex
+++ b/lichee/tools/pack/chips/sun50iw6p1/configs/petrel-p1/sys_config.fex
@@ -348,19 +348,19 @@ uart2_rts = port:PD21<7><1><default><default>
uart2_cts = port:PD22<7><1><default><default>
[uart3]
-uart3_used = 0
+uart3_used = 1
uart3_port = 3
-uart3_type = 4
+uart3_type = 2
uart3_tx = port:PD23<4><1><default><default>
uart3_rx = port:PD24<4><1><default><default>
-uart3_rts = port:PD25<4><1><default><default>
-uart3_cts = port:PD26<4><1><default><default>
+;uart3_rts = port:PD25<4><1><default><default>
+;uart3_cts = port:PD26<4><1><default><default>
[uart3_suspend]
uart3_tx = port:PD23<7><1><default><default>
uart3_rx = port:PD24<7><1><default><default>
-uart3_rts = port:PD25<7><1><default><default>
-uart3_cts = port:PD26<7><1><default><default>
+;uart3_rts = port:PD25<7><1><default><default>
+;uart3_cts = port:PD26<7><1><default><default>
;----------------------------------------------------------------------------------
;SPI controller configuration
修改完代码，重新编译Kernel
lemon@ubuntu:~/Develop/OrangePi_Lite2/lichee$ ./build.sh config
Welcome to mkscript setup progress
All available chips:
0. sun50iw1p1
1. sun50iw2p1
2. sun50iw6p1
3. sun8iw11p1
4. sun8iw12p1
5. sun8iw6p1
6. sun8iw7p1
7. sun8iw8p1
8. sun9iw1p1
Choice: 2
All available platforms:
0. android
1. dragonboard
2. linux
3. eyeseelinux
Choice: 0
All available business:
0. 5.1
1. 4.4
2. 7.x
Choice: 2
LICHEE_BUSINESS=7.x
using kernel 'linux-3.10':
select arch by kernel version and chip
==================================
INFO: ----------------------------------------
INFO: build lichee ...
INFO: chip: sun50iw6p1
INFO: platform: android
INFO: business: 7.x
INFO: kernel: linux-3.10
INFO: arch: arm64
INFO: board:
INFO: output: out/sun50iw6p1/android/
INFO: ----------------------------------------
INFO: build buildroot ...
external toolchain has been installed
external toolchain_32 has been installed
INFO: build buildroot OK.
regenerate rootfs cpio
15757 blocks
17099 blocks
build_ramfs
Copy boot.img to output directory ...
Copy modules to target ...
sun50iw6p1 compile Kernel successful
INFO: build kernel OK.
INFO: build rootfs ...
INFO: skip make rootfs for android
INFO: build rootfs OK.
----------------------------------------
build sun50iw6p1 android 7.x lichee OK
----------------------------------------
编译完Kernel，还需对镜像进行打包，这样才可以烧写到SD卡中。
lemon@ubuntu:~/Develop/OrangePi_Lite2/lichee$ cd ..
lemon@ubuntu:~/Develop/OrangePi_Lite2$ cd android/
lemon@ubuntu:~/Develop/OrangePi_Lite2/android$ export LC_ALL=C
lemon@ubuntu:~/Develop/OrangePi_Lite2/android$ source ./build/envsetup.sh
including device/asus/fugu/vendorsetup.sh
including device/generic/mini-emulator-arm64/vendorsetup.sh
including device/generic/mini-emulator-armv7-a-neon/vendorsetup.sh
including device/generic/mini-emulator-mips/vendorsetup.sh
including device/generic/mini-emulator-mips64/vendorsetup.sh
including device/generic/mini-emulator-x86/vendorsetup.sh
including device/generic/mini-emulator-x86_64/vendorsetup.sh
including device/google/dragon/vendorsetup.sh
including device/htc/flounder/vendorsetup.sh
including device/huawei/angler/vendorsetup.sh
including device/lge/bullhead/vendorsetup.sh
including device/linaro/hikey/vendorsetup.sh
including device/moto/shamu/vendorsetup.sh
including device/softwinner/cheetah-cmcc-p1/vendorsetup.sh
including device/softwinner/cheetah-p1/vendorsetup.sh
including device/softwinner/common/vendorsetup.sh
including device/softwinner/petrel-cmcc-p1/vendorsetup.sh
including device/softwinner/petrel-p1/vendorsetup.sh
including sdk/bash_completion/adb.bash
lemon@ubuntu:~/Develop/OrangePi_Lite2/android$ lunch petrel_fvd_p1-eng
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=7.0
TARGET_PRODUCT=petrel_fvd_p1
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a-neon
TARGET_CPU_VARIANT=cortex-a7
TARGET_2ND_ARCH=
TARGET_2ND_ARCH_VARIANT=
TARGET_2ND_CPU_VARIANT=
HOST_ARCH=x86_64
HOST_2ND_ARCH=x86
HOST_OS=linux
HOST_OS_EXTRA=Linux-4.15.0-33-generic-x86_64-with-Ubuntu-18.04-bionic
HOST_CROSS_OS=windows
HOST_CROSS_ARCH=x86
HOST_CROSS_2ND_ARCH=x86_64
HOST_BUILD_TYPE=release
BUILD_ID=NRD91N
OUT_DIR=out
============================================
lemon@ubuntu:~/Develop/OrangePi_Lite2/android$ extract-bsp
/home/lemon/Develop/OrangePi_Lite2/android/device/*/petrel-p1/bImage copied!
/home/lemon/Develop/OrangePi_Lite2/android/device/*/petrel-p1/modules copied!
lemon@ubuntu:~/Develop/OrangePi_Lite2/android$ pack
copying tools file
copying configs file
./out/aultls32.fex
./out/aultools.fex
./out/boot_package.cfg
./out/boot_package.fex
./out/cardscript.fex
./out/cardscript_secure.fex
./out/cardtool.fex
./out/diskfs.fex
./out/env.cfg
./out/env_burn.cfg
./out/env_dragon.cfg
./out/esm.fex
./out/image.cfg
./out/parameter.fex
./out/split_xxxx.fex
./out/sunxi.fex
./out/sys_config.fex
./out/sys_partition.fex
./out/sys_partition_dragonboard.fex
./out/sys_partition_dump.fex
./out/sys_partition_linux.fex
./out/sys_partition_private.fex
./out/sysrecovery.fex
./out/test_config.fex
./out/toc0.fex
./out/toc1.fex
./out/usbtool.fex
./out/usbtool_test.fex
./out/verity_block.fex
copying boot resource
cp: cannot stat 'out/boot-resource/bootlogo.jpg': No such file or directory
lzma: out/bootlogo.jpg: No such file or directory
lzma: out/bempty.bmp: No such file or directory
lzma: out/battery_charge.bmp: No such file or directory
copying boot file
Conver script to dts ok.
update scp
pack boot package
GetPrivateProfileSection read to end
content_count=10
no used multi config
packing for android
normal
mbr count = 4
partitation file Path=/home/lemon/Develop/OrangePi_Lite2/lichee/tools/pack/out/sys_partition.bin
mbr_name file Path=/home/lemon/Develop/OrangePi_Lite2/lichee/tools/pack/out/sunxi_mbr.fex
download_name file Path=/home/lemon/Develop/OrangePi_Lite2/lichee/tools/pack/out/dlinfo.fex
mbr size = 16384
mbr magic softw411
disk name=bootloader
filename = bootloader.fex
dl_file_size = 16058 sector
part_size = 32768 sector
disk name=env
filename = env.fex
dl_file_size = 256 sector
part_size = 32768 sector
disk name=boot
filename = boot.fex
dl_file_size = 33644 sector
part_size = 65536 sector
disk name=system
filename = system.fex
dl_file_size = 1232405 sector
part_size = 3145728 sector
disk name=verity_block
filename = verity_block.fex
dl_file_size = 2082 sector
part_size = 32768 sector
disk name=misc
disk name=recovery
filename = recovery.fex
dl_file_size = 38504 sector
part_size = 65536 sector
disk name=sysrecovery
filename = sysrecovery.fex
dl_file_size = 0 sector
part_size = 3145728 sector
disk name=private
disk name=alog
disk name=Reserve0
disk name=Reserve1
disk name=Reserve2
disk name=cache
disk name=UDISK
this is not a partition key
update_for_part_info 0
crc 0 = c8b8d2aa
crc 1 = 5d0583f7
crc 2 = 38b37651
crc 3 = ad0e270c
update mbr file ok
/home/lemon/Develop/OrangePi_Lite2/lichee/tools/pack/pctools/linux/eDragonEx/
/home/lemon/Develop/OrangePi_Lite2/lichee/tools/pack/out
Begin Parse sys_partion.fex
Add partion bootloader.fex BOOTLOADER_FEX00
Add partion very bootloader.fex BOOTLOADER_FEX00
FilePath: bootloader.fex
FileLength=7d7400Add partion env.fex ENV_FEX000000000
Add partion very env.fex ENV_FEX000000000
FilePath: env.fex
FileLength=20000Add partion boot.fex BOOT_FEX00000000
Add partion very boot.fex BOOT_FEX00000000
FilePath: boot.fex
FileLength=106d800Add partion system.fex SYSTEM_FEX000000
Add partion very system.fex SYSTEM_FEX000000
FilePath: system.fex
FileLength=259c2a74Add partion verity_block.fex VERITY_BLOCK_FEX
Add partion very verity_block.fex VERITY_BLOCK_FEX
FilePath: verity_block.fex
FileLength=1045b4Add partion recovery.fex RECOVERY_FEX0000
Add partion very recovery.fex RECOVERY_FEX0000
FilePath: recovery.fex
FileLength=12cd000Add partion sysrecovery.fex SYSRECOVERY_FEX0
Add partion diskfs.fex DISKFS_FEX000000
sys_config.fex Len: 0x10232
board.fex Len: 0x400
config.fex Len: 0xcc00
split_xxxx.fex Len: 0x200
sys_partition.fex Len: 0x124b
sunxi.fex Len: 0x18800
boot0_nand.fex Len: 0xc000
boot0_sdcard.fex Len: 0x8000
u-boot.fex Len: 0x138000
toc1.fex Len: 0x8
toc0.fex Len: 0x8
fes1.fex Len: 0x4340
boot_package.fex Len: 0x1ac000
usbtool.fex Len: 0x23600
aultools.fex Len: 0x2847b
aultls32.fex Len: 0x24d23
cardtool.fex Len: 0x11e00
cardscript.fex Len: 0x779
sunxi_mbr.fex Len: 0x10000
dlinfo.fex Len: 0x4000
arisc.fex Len: 0x6
bootloader.fex Len: 0x7d7400
Vbootloader.fex Len: 0x4
env.fex Len: 0x20000
Venv.fex Len: 0x4
boot.fex Len: 0x106d800
Vboot.fex Len: 0x4
system.fex Len: 0x259c2a74
Vsystem.fex Len: 0x4
verity_block.fex Len: 0x1045b4
Vverity_block.fex Len: 0x4
recovery.fex Len: 0x12cd000
Vrecovery.fex Len: 0x4
sysrecovery.fex Len: 0xb
diskfs.fex Len: 0x200
BuildImg 0
Dragon execute image.cfg SUCCESS !
----------image is at----------
/home/lemon/Develop/OrangePi_Lite2/lichee/tools/pack/sun50iw6p1_android_petrel-p1_uart0.img
pack finish
测试
查看有没有ttyS设备
现在我们就可以直接连接OTG接口到电脑，连接USB ADB，这样不用占用原来的串口调试，又可以空出来给我们进行UART测试。
petrel-p1:/ # ls /dev/ttyS*
/dev/ttyS0 /dev/ttyS1 /dev/ttyS3
petrel-p1:/ #
连接测试
首先需要设置波特率115200然后再进行测试。
petrel-p1:/ # busybox stty -F /dev/ttyS3 speed 115200 cs8 -parenb -cstopb
115200
petrel-p1:/ #
这里讲个技巧，开两个Shell，cat /dev/ttyS3是收，echo xxx > /dev/ttyS3是发，从图可以看出收发正常，配置成功。
