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fwupd/plugins/ch341a
History
Richard Hughes 84217074b0 Allow dumping CFI devices using fwupdtool 
This regressed with 7dc34ff02e.
2023-01-13 15:43:39 +00:00
..
ch341a.quirk Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
fu-ch341a-cfi-device.c Allow dumping CFI devices using fwupdtool 2023-01-13 15:43:39 +00:00
fu-ch341a-cfi-device.h Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
fu-ch341a-device.c trivial: Fix some g_prefix_error() calls to include the trailing space 2022-11-30 10:13:19 +00:00
fu-ch341a-device.h Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
fu-ch341a-plugin.c trivial: Fix a few more plugin names 2022-09-30 12:28:20 +01:00
fu-ch341a-plugin.h Build many more plugins as builtin 2022-09-28 17:01:23 +01:00
lsusb.txt Add a plugin for the CH341A device 2022-04-03 16:29:30 +01:00
meson.build Build many more plugins as builtin 2022-09-28 17:01:23 +01:00
README.md Include the plugin README text in the generated docs 2023-01-10 14:58:30 +00:00

README.md

title: Plugin: 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.