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fwupd/plugins/ch341a
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Richard Hughes 14cc9b2064 Unexport fu_common_reverse_uint8() 
It's only used in one little-used plugin.
2022-06-14 14:36:52 -05:00
..
ch341a.quirk Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
fu-ch341a-cfi-device.c Split out the memory helpers to a new source file 2022-06-14 14:36:52 -05:00
fu-ch341a-cfi-device.h Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
fu-ch341a-device.c Unexport fu_common_reverse_uint8() 2022-06-14 14:36:52 -05:00
fu-ch341a-device.h Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
fu-plugin-ch341a.c Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
lsusb.txt Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
meson.build Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
README.md Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00

README.md

CH341A

Introduction

The CH341A is an affordable SPI programmer.

The assumed map between UIO command bits, pins on CH341A chip and pins on SPI chip:

UIO  CH341A  SPI     CH341A
0    D0/15   CS/1    CS0
1    D1/16   unused  CS1
2    D2/17   unused  CS2
3    D3/18   SCK/6   DCK
4    D4/19   unused  DOUT2
5    D5/20   SI/5    DOUBT
6    D6/21   unused  DIN2
7    D7/22   SO/2    DIN

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob of unspecified format.

This plugin supports the following protocol ID:

  • com.winchiphead.ch341a

GUID Generation

These devices use the standard USB DeviceInstanceId values, e.g.

  • USB\VID_1A86&PID_5512&REV_0304
  • USB\VID_1A86&PID_5512

Update Behavior

The device programs devices in raw mode, and can best be used with fwupdtool.

To write an image, use sudo fwupdtool --plugins ch341a install-blob firmware.bin and to backup the contents of a SPI device use sudo fwupdtool --plugins ch341a firmware-dump backup.bin

Vendor ID Security

The vendor ID is set from the USB vendor, in this instance set to USB:0x1A86

External Interface Access

This plugin requires read/write access to /dev/bus/usb.