Search found 80 matches

by ESP_Bob
Mon Aug 12, 2024 3:32 am
Forum: ESP-IDF
Topic: Building hello_world with idfv4.4beta1 results in xtensa-esp32-elf-gcc.exe: error: @-file refers to a directory
Replies: 4
Views: 9699

Re: Building hello_world with idfv4.4beta1 results in xtensa-esp32-elf-gcc.exe: error: @-file refers to a directory

It's an known issue for some Windows Users with old version ccache in IDF v4.x

For quick workaround:
Please call `idf.py --no-ccache build` instead
by ESP_Bob
Tue Feb 20, 2024 3:55 am
Forum: ESP-IDF
Topic: How to set "ESP_PLATFORM" to 1 in Custom CMake Projects
Replies: 1
Views: 2046

Re: How to set "ESP_PLATFORM" to 1 in Custom CMake Projects

IDF provide a simple cmake function `idf_build_set_property`, Please refer https://github.com/espressif/esp-idf/bl ... #L620-L621
by ESP_Bob
Thu Jan 25, 2024 2:02 am
Forum: ESP-IDF 中文讨论版
Topic: ESP32-s3 usb msc电脑不能识别
Replies: 5
Views: 7281

Re: ESP32-s3 usb msc电脑不能识别

ljt0926 wrote:
Wed Jan 24, 2024 8:48 am
这个解决了吗,我也有这个问题,这种接法是否支持
如上图,esp32-s3-devkit 的 USB 接口默认只能输入 5V,不能输出 5V,因为有一个防止反向的二极管。如果你想输出 5V,可以自行把开发版上的二极管短路。
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Snipaste_2024-01-25_09-59-48.png (75.79 KiB) Viewed 4149 times
by ESP_Bob
Tue Oct 31, 2023 10:02 am
Forum: ESP-BOX 中文讨论版
Topic: ESP32-S3R8
Replies: 1
Views: 24948

Re: ESP32-S3R8

1,ESPS3R8 USB转串口下载,芯片需要特殊配制么? 不需要特殊配置,插入电脑会显示一个 USB-Serial-JTAG 设备,一个串口设备,直接使用串口设备对应的 COM 号下载即可(如果应用中占用了 USB 口(例如启用了 U 盘功能),需要先手动进入下载模式) 2.JTAG端口只能调试,不能下载么? 可以下载:https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-guides/jtag-debugging/index.html#upload-application-for-debugging 3.串口下载...
by ESP_Bob
Thu Oct 19, 2023 1:39 am
Forum: ESP-IDF
Topic: Using ESP_INTR_FLAG_SHARED with the GPIO driver
Replies: 2
Views: 4016

Re: Using ESP_INTR_FLAG_SHARED with the GPIO driver

Thank you for your suggestions.

From IDF 5.0, it already supports config some GPIO API to IRAM, and also adds `__attribute__((always_inline))`
by ESP_Bob
Wed Oct 18, 2023 8:43 am
Forum: Hardware
Topic: ESP32-S3 USB OTG - USB Hub support?
Replies: 28
Views: 29056

Re: ESP32-S3 USB OTG - USB Hub support?

USB Hub is not supported by Host Driver now. Would you please tell us the application scenario? Which kind of device users want to connect through HUB? and how many? this will help us evaluate the priorities of this driver development
by ESP_Bob
Mon Sep 04, 2023 6:27 am
Forum: ESP-IDF 中文讨论版
Topic: ESP32 S3 使用例程usb_host_lib枚举device失败
Replies: 2
Views: 4777

Re: ESP32 S3 使用例程usb_host_lib枚举device失败

“使用OTG转接头插入U盘” 需要注意 dev-kits 的 usb 接口是不能向外供电 5V 的,只能输出 5V
by ESP_Bob
Mon Sep 04, 2023 6:25 am
Forum: ESP IoT Solution 中文讨论版
Topic: 【已解决】关于uvc驱动摄像头的问题
Replies: 9
Views: 33329

Re: 关于uvc驱动摄像头的问题

会准备多次传输请求,排队传输。写 1 也可以,对照一下是否有吞吐率降低
by ESP_Bob
Tue Aug 29, 2023 8:53 am
Forum: ESP IoT Solution 中文讨论版
Topic: 【已解决】关于uvc驱动摄像头的问题
Replies: 9
Views: 33329

Re: 关于uvc驱动摄像头的报错问题

bulk:transfer size in each urb same as frame buffer

如果开了,每发起一次 bulk 传输,会请求一帧的数据,所以会占用更多的 RAM

如果不开,会发起多次 bulk 传输来获取一帧数据