mirror of https://github.com/OpenIPC/wiki.git
83 lines
1.9 KiB
Markdown
83 lines
1.9 KiB
Markdown
# OpenIPC Wiki
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[Table of Content](../README.md)
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Sigmastar unbrick
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---
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**Locate the Sigmastar UART output and connect it to the CH341A I2C:**
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- $\color{black}{\texttt{GND -> GND (PIN 1-4)}}$
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- $\color{deepskyblue}{\texttt{TX -> SDA I2C (PIN 5)}}$
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- $\color{orange}{\texttt{RX -> SCL I2C (PIN 6)}}$
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<img src="../images/sigmastar-ch341a.webp">
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<img src="../images/sigmastar-uart.webp">
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<img src="../images/sigmastar-example.webp">
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---
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**Download ch341-i2c driver:**
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```
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git clone https://github.com/frank-zago/ch341-i2c-spi-gpio
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make -C ch341-i2c-spi-gpio
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sudo insmod ch341-i2c-spi-gpio/ch341-core.ko
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sudo insmod ch341-i2c-spi-gpio/i2c-ch341.ko
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```
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**Download snander-mstar programmer:**
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```
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git clone https://github.com/viktorxda/snander-mstar
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make -C snander-mstar
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mv snander-mstar/snander .
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```
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---
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**Use i2cdetect to check for the device:**
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- 0x49 -> isp programming
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- 0x59 -> serial debugging
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```
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sudo i2cdetect -y 0
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```
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<img src="../images/sigmastar-detect.webp" width=70% height=70%>
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**Check the device flash with snander:**
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```
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sudo ./snander -i
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```
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<img src="../images/sigmastar-check.webp" width=70% height=70%>
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**Read original uboot:**
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```
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sudo ./snander -a 0x000000 -l 0x3C0000 -r boot.bin
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```
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<img src="../images/sigmastar-read.webp" width=70% height=70%>
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**Erase, write and verify new uboot:**
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```
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sudo ./snander -a 0x000000 -l 0x200000 -e
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sudo ./snander -a 0x000000 -l 0x200000 -w u-boot-ssc338q-spinand.bin -v
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```
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<img src="../images/sigmastar-write.webp" width=70% height=70%>
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---
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**Vendor partition table for spinand:**
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```
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CIS 0x0000000-0x0020000 128KB
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IPL0 0x0140000-0x0200000 768KB
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IPL_CUST0 0x0200000-0x0260000 384KB
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IPL_CUST1 0x0260000-0x02C0000 384KB
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UBOOT0 0x02C0000-0x0320000 384KB
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UBOOT1 0x0320000-0x0380000 384KB
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ENV 0x0380000-0x03C0000 256KB
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KERNEL 0x03C0000-0x08C0000 5120KB
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RECOVERY 0x08C0000-0x0DC0000 5120KB
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rootfs 0x0DC0000-0x13C0000 6144KB
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UBI 0x13C0000-0x8000000 110848KB
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```
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