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ArduinoTM

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注册时间： 2020-02-10

已发帖子： 4

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关于F1C200s在U-boot中实现LCD-swap_r_b交换蓝色与红色的方法

最近在调试kmakise大佬画的黑猫F1C200s板时发现lcd的红色与绿色io口互换了，导致u-boot显示logo色彩出现错误

经过多番查证，发现了这么一个寄存器

7.2.5.7. TCON0_CTL_REG (Default Value: 0x00000000)
Offset: 0x040
Register Name: TCON0_CTL_REG
R/W Default/Hex Description
31 R/W 0 TCON0_En
0: disable
1: enable
Note: It executes at the beginning of the first blank line of TCON0 timing.
30:29 / / /
28 R/W 0 TCON0_Work_Mode
0: normal
1: dynamic freq
27:26 / / /
25:24 R/W 0 TCON0_IF
00: HV(Sync+DE)
01: 8080 I/F
1x:reserved
23 R/W 0 TCON0_RB_Swap
0: default
1: swap RED and BLUE data at FIFO1
22 / / 21 R/W 0 20 / 19:9 / 8:4

在u-boot中通过内存操作命令验证：

=> md 0x01c0c040
01c0c040: 80000100 f000000a 01df010f 02140030    ............0...
01c0c050: 0240000b 00280009 00000000 00000000    ..@...(.........
01c0c060: 00000000 00000000 00000000 00000000    ................
01c0c070: 00000000 00000000 00000000 00000000    ................
01c0c080: 00000000 00000000 13000000 00000000    ................
01c0c090: 00000000 00000000 00000000 00000000    ................
01c0c0a0: 00000000 00000000 00000000 00000000    ................
01c0c0b0: 00000000 00000000 00000000 00000000    ................
01c0c0c0: 00000000 00000000 00000000 00000000    ................
01c0c0d0: 00000000 00000000 00000000 00000000    ................
01c0c0e0: 00000000 00000000 00000000 00000000    ................
01c0c0f0: 00000000 ffffffff 00000000 30030000    ...............0
01c0c100: 30030000 30030000 30030000 30030000    ...0...0...0...0
01c0c110: 30030000 30030000 30030000 30030000    ...0...0...0...0
01c0c120: 30030000 30030000 30030000 30030000    ...0...0...0...0
01c0c130: 30030000 30030000 30030000 30030000    ...0...0...0...0

修改内存值80800100

=> mw.l 0x01c0c040 80800100
01c0c040: 80800100 f000000a 01df010f 02140030    ............0...
01c0c050: 0240000b 00280009 00000000 00000000    ..@...(.........
01c0c060: 00000000 00000000 00000000 00000000    ................
01c0c070: 00000000 00000000 00000000 00000000    ................
01c0c080: 00000000 00000000 13000000 00000000    ................
01c0c090: 00000000 00000000 00000000 00000000    ................
01c0c0a0: 00000000 00000000 00000000 00000000    ................
01c0c0b0: 00000000 00000000 00000000 00000000    ................
01c0c0c0: 00000000 00000000 00000000 00000000    ................
01c0c0d0: 00000000 00000000 00000000 00000000    ................
01c0c0e0: 00000000 00000000 00000000 00000000    ................
01c0c0f0: 00000000 ffffffff 00000000 30030000    ...............0
01c0c100: 30030000 30030000 30030000 30030000    ...0...0...0...0
01c0c110: 30030000 30030000 30030000 30030000    ...0...0...0...0
01c0c120: 30030000 30030000 30030000 30030000    ...0...0...0...0
01c0c130: 30030000 30030000 30030000 30030000    ...0...0...0...0

查找uboot源码，发现了lcd初始化部分的内存操作代码，按照格式写测试代码

插电，开机电流轻松跑上去，问题解决

ArduinoTM

会员

注册时间： 2020-02-10

已发帖子： 4

积分： 4

Re: 关于F1C200s在U-boot中实现LCD-swap_r_b交换蓝色与红色的方法

之前我也遇到过，感谢楼主分享

“插电，开机电流轻松跑上去，问题解决”
哈哈，看到这句似曾相识，楼主是不是看维修厮的视频了

没错，老维修厮了，hhhhhhh
午安大电牛警告⚠️