STM32L4移植cherryUSB报错，不支持DMA

发布于 2024-07-25 11:11:01 浏览：421 订阅该版

在STM32L4R5ZIT6中移植cherryUSB,出现如下报错，显示不支持DMA模式：
```c
This dwc2 version does not support dma mode, so stop working
```
日志如下：

```c
 \ | /
- RT -     Thread Operating System
 / | \     4.1.1 build Jul 25 2024 10:44:14
 2006 - 2022 Copyright by RT-Thread team
lwIP-2.0.3 initialized!
SW_3V3_PIN:1
MASTER_5V_PIN:1
VDD_3V3_ETH_PIN:1
VDD_5V_USB_PIN:1
[I/SFUD] Find a Macronix flash chip. Size is 33554432 bytes.
[I/SFUD] norflash0 flash device is initialize success.
[I/SFUD] Probe SPI flash norflash0 by SPI device spi1.norflash success.
[I/sal.skt] Socket Abstraction Layer initialize success.
[I/SFUD] norflash0 Filesystem initialized 1!
[I/wiz] RT-Thread WIZnet package (V2.1.0) initialize success.
[I/USB] ========== dwc2 hcd params ==========
[I/USB] CID:00003000
[I/USB] GSNPSID:4f54330a
[I/USB] GHWCFG1:00000000
[I/USB] GHWCFG2:229ed520
[I/USB] GHWCFG3:0200d1e8
[I/USB] GHWCFG4:17f08030
[I/USB] dwc2 has 12 channels and dfifo depth(32-bit words) is 512
[E/USB] This dwc2 version does not support dma mode, so stop working
```
补充：

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240725/8d0cfdd450b2256323dee7be27d5483d.png)