我的产品是 SOC+DS90UH941+DS90UB926。
我使用 了示波器并测试了 DS90UB926引脚、PCLK 引脚具有时钟信号输出且频率正确、但 VS 和 HS 引脚无信号输出且始终为高电平。
下图(蓝色信号)是经测试的 DS90UB926 HS 信号 I:
下图(蓝色信号)是经测试的 DS90UB926 VS 信号 I:
我在 DS90UH941中使用了图形发生器、然后可以看到 VS 和 HS 有一些信号输出。
下面是我使用的指挥官
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# i2cset -f -y 3 0x0c 0x65 0x0 //图形发生器配置
# i2cset -f -y 3 0x0c 0x64 0x05 //启用图形发生器
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下图(蓝色信号)是经测试的 DS90UB926 HS 信号 I:
下图(蓝色信号)是经测试的 DS90UB926 VS 信号 I:
它看起来像是 SOC DSI 输出或 DS90UH941寄存器配置中的问题。
我不知道 DS90UB941中是否有需要配置的寄存器来输出 VS HS 信号。
Blow 是我的 DS90UH941初始配置。
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{IS_HOST_I2C_ADDRESS、0x01、0x08、0}、// DSI 禁用
{IS_HOST_I2C_ADDRESS、0x1E、0x01、0}、//选择端口0
{IS_HOST_I2C_ADDRESS、0x03、0x9a、0}、// General_CFG:启用 I2C 直通模式
{IS_HOST_I2C_ADDRESS、0x17、0x9e、0}、// I2C_CONTROL:I2C_PASS_ALL
{IS_HOST_I2C_ADDRESS、0x1E、0x01、0}、//选择端口0
{IS_HOST_I2C_ADDRESS、0x40、0x04、0}、//选择 DSI 数字页
{IS_HOST_I2C_ADDRESS、0x41、0x21、0}、// HS_POLARITY = 1、VS_POLARITY = 1
{IS_HOST_I2C_ADDRESS、0x42、0x60、0}、
{IS_HOST_I2C_ADDRESS、0x5B、0x01、0}、//强制单模式
{IS_HOST_I2C_ADDRESS、0x4F、0x8C、0}、//设置4个通道 DSI
{IS_HOST_I2C_ADDRESS、0x1E、0x01、0}、//选择端口0
{IS_HOST_I2C_ADDRESS、0x40、0x04、0}、//选择 DSI 数字页
{IS_HOST_I2C_ADDRESS、0x41、0x05、0}、//至寄存器0x05 (TSKIP CNT)
{IS_HOST_I2C_ADDRESS、0x42、0x02、0}、//设置 DSI+CLK=94.5MHz 的值
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以下是 DS90UH941的参数:
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root@euto-v9:~# i2cdump -f -y 3 0x0c
未指定大小(使用字节数据访问)
0 1 2 3 4 5 6 7 8 9 A b c d e f 0123456789abcdef
00:18 00 00 9a 00 58 00 00 01 0c 00 47 30 00 00 ??????????????。G0。
10:00 00 00 CB 00 00 00 fe 9e 7f 01 00 00 01 00 00 01 00 ...??????? ...?
20:00 00 25 00 00 00 00 00 01 20 80 00 A5 5a ……%…… ? ????Z
30:00 09 00 05 0c 00 00 00 00 00 00 00 00 00 00 00 00 81 02 ??
40:04 05 02 00 00 00 00 00 00 00 00 00 00 00 00 00 8c ??? ?
50:16 00 00 00 02 00 02 00 00 D9 01 07 06 44 1f ?????????D?
60:22 02 00 10 00 00 00 00 00 00 00 00 00 00 20 00 。
70:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 00 … ?。
80:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90:0b be 08 db 78 00 00 00 00 00 00 00 00 00 00 00 00 ???x..........
A0:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0:00 00 82 00 38 00 64 c0 00 00 00 00 00 02 ff 00 .. 8 .. d?..
D0:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0:00 00 82 00 28 38 00 00 00 00 00 00 00 00 02 00 00 ...(8) ?..
F0:5F 55 48 39 34 31 00 00 00 00 00 00 00 00 00 00 _UH941 .........
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以下是 DS90UB926的参数:
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未指定大小(使用字节数据访问)
0 1 2 3 4 5 6 7 8 9 A b c d e f 0123456789abcdef
00:58 04 80 F1 fe 1e 04 18 00 00 00 00 00 00 00 X?????? …………
10:00 00 00 00 00 00 00 00 01 00 03 a0 00 00.......... ?????..
20:00 00 10 08 00 83 84 00 00 00 00 00 00 00 00 00 00 00 ...???
30:00 00 10 25 fa 00 00 00 00 00 00 00 17 00 a0 00 10 ……%?…… ????
40:43 18 03 00 30 70 00 00 0f 00 00 00 00 00 00 00 00 00 C??.0P
50:03 10 00 01 80 00 08 00 3f 20 00 00 00 00 00 00???????? …
60:00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ……?…
70:00 00 07 08 00 00 00 00 00 00 00 00 00 00 02 00 00 00 ...?? ?。
80:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0:00 00 00 00 00 00 00 40 00 00 00 00 00 00 00 00 00 @…
D0:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0:00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0: 5F 55 42 39 32 36 00 00 00 00 00 00 00 00 00 00 _UB926 .........