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Explore I2C

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Lee Lup Yuen 2023-10-19 11:19:53 +08:00
parent 0c627714c9
commit deba65ee10
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README.md
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@ -7617,7 +7617,9 @@ TODO: Do we need to bother with Bus Connections?
Let's explore the I2C Controller for Star64 JH7110. We need the I2C for controlling the [X-Powers AXP15060 PMIC](https://lupyuen.github.io/articles/display3#appendix-jh7110-display-driver), which will be used for HDMI Output. Let's explore the I2C Controller for Star64 JH7110. We need the I2C for controlling the [X-Powers AXP15060 PMIC](https://lupyuen.github.io/articles/display3#appendix-jh7110-display-driver), which will be used for HDMI Output.
According to the [I2C Device Tree Configuration](https://doc-en.rvspace.org/VisionFive2/DG_I2C/JH7110_SDK/i2c_source_code.html): I2C Base Address is 0x10030000, with range 0x10000. According to the [I2C Device Tree Configuration](https://doc-en.rvspace.org/VisionFive2/DG_I2C/JH7110_SDK/i2c_source_code.html): I2C Port 0 Base Address is 0x10030000, with range 0x10000.
(There are 7 I2C Ports: I2C0 to I2C6)
Let's dump the I2C Registers with U-Boot Bootloader... Let's dump the I2C Registers with U-Boot Bootloader...
@ -7783,7 +7785,7 @@ $ md 0x13030014 1
$ md 0x1303009c 1 $ md 0x1303009c 1
1303009c: 00042600 .&.. 1303009c: 00042600 .&..
## Dump the I2C Registers ## Dump the I2C Registers for I2C Port 0
$ md 0x10030000 0x40 $ md 0x10030000 0x40
10030000: 0000007f 00000055 00000055 00000001 ....U...U....... 10030000: 0000007f 00000055 00000055 00000001 ....U...U.......
10030010: 00000000 00000190 000001d6 0000003c ............<... 10030010: 00000000 00000190 000001d6 0000003c ............<...
@ -7803,7 +7805,7 @@ $ md 0x10030000 0x40
100300f0: 00000000 001f1fee 3230302a 44570140 ........*002@.WD 100300f0: 00000000 001f1fee 3230302a 44570140 ........*002@.WD
``` ```
Yep I2C is alive yay! Yep I2C Port 0 is alive yay!
TODO: What about [SYS SYSCON](https://doc-en.rvspace.org/JH7110/TRM/JH7110_TRM/sys_syscon.html): TODO: What about [SYS SYSCON](https://doc-en.rvspace.org/JH7110/TRM/JH7110_TRM/sys_syscon.html):
@ -8005,7 +8007,7 @@ The above Actual Values were retrieved from U-Boot...
```bash ```bash
## Omitted: Power Up I2C Controller ## Omitted: Power Up I2C Controller
... ...
## Dump the I2C Registers ## Dump the I2C Registers for I2C Port 0
$ md 0x10030000 0x40 $ md 0x10030000 0x40
10030000: 0000007f 00000055 00000055 00000001 ....U...U....... 10030000: 0000007f 00000055 00000055 00000001 ....U...U.......
10030010: 00000000 00000190 000001d6 0000003c ............<... 10030010: 00000000 00000190 000001d6 0000003c ............<...