Search found 11 matches

by yangff
Tue Oct 12, 2021 3:17 am
Forum: 硬件问题讨论
Topic: ESP8266的CHIP_EN和EXT_RSTB管脚感觉是重复的
Replies: 1
Views: 4308

Re: ESP8266的CHIP_EN和EXT_RSTB管脚感觉是重复的

8266那里用来deep sleep唤醒的吧,直接拉en的话rtc内存里的东西就没有了,32在deep sleep的时候能跑的功能更多,读IO或者自己唤醒自己就没必要单独拿一个脚了。
by yangff
Sun Oct 10, 2021 5:04 am
Forum: ESP-IDF 中文讨论版
Topic: 能不能将串口打印函数重定向到自己软件模拟的uart上?
Replies: 5
Views: 6244

Re: 能不能将串口打印函数重定向到自己软件模拟的uart上?

Archi.Xie wrote:
Sat Oct 09, 2021 1:35 pm
在Component config → ESP System Settings 下面没有找到 Channel for console output额?大佬有截图么?
只有带usb的芯片才能用吧,s2 s3 c3这些
by yangff
Fri Oct 08, 2021 2:32 am
Forum: 硬件问题讨论
Topic: 启用WiFi导致ADC1的采样延迟不稳定?
Replies: 0
Views: 2614

启用WiFi导致ADC1的采样延迟不稳定?

我按照网上的一些代码使用esp32的lna,然后它应该是被adc1采样的吧,但是在启用WiFi之后,单次SENS_SAR_MEAS_START1_REG.SENS_MEAS1_START_SAR = 1之后到SENS_MEAS1_DONE=1的时间变得非常不稳定。 不使用WiFi的情况下,它一秒能吐个7k左右的采样,这和cycle算出来的结果也差不多吻合,但是一旦启动WiFi之后,这个数字就从剧烈波动 2: 17.970428 T: 1917.804077 3: 22.507694 T: 788.185852 0: 23.901028 T: 7240.023926 1: 26.151798 T...
by yangff
Mon May 07, 2018 9:04 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 426
Views: 782369

Re: What would you like to see in The Next Chip?

What about improve the functional pin mapping? Many boot strapping pins and other pins that used by on board flash makes it hard for pin arrangement. More confusing, SDIO even overlapped with bootstrapping pins and have different pull-up/down requirements for a 3.3v flash... Also, the exists of thes...
by yangff
Thu Jan 18, 2018 1:20 pm
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 426
Views: 782369

Re: What would you like to see in The Next Chip?

#WhereIsWifiP2P :D
by yangff
Thu Aug 31, 2017 10:02 am
Forum: ESP-IDF
Topic: If it's possible to use BLE and Bluetooth audio (a2dp) at time time?
Replies: 0
Views: 3102

If it's possible to use BLE and Bluetooth audio (a2dp) at time time?

Hi, I'm making something looks like bluetooth headset/speaker but to save battery energy as much as possible. So, in most time it stays quiet and working on BLE. Only when it's playing music, it turn to bluetooth classical. And this process makes sense to me. (I'm not familar with Bluetooth, if it's...
by yangff
Fri Jun 23, 2017 9:18 am
Forum: Hardware
Topic: What's wrong when I move from breadboard to PCB?
Replies: 7
Views: 14538

Re: What's wrong when I move from breadboard to PCB?

OK... After carefully inspected my breadboard, I found the problem... First, I replaced the LDO to AMS1117-3.3 by some ugly wire... Second, I miss connected RX to RX and TX to TX in the pcb.. after some dirty cut and reconnect it finally works... I'm wondering what I'm thinking at that time... :oops...
by yangff
Fri Jun 23, 2017 8:38 am
Forum: Hardware
Topic: What's wrong when I move from breadboard to PCB?
Replies: 7
Views: 14538

Re: What's wrong when I move from breadboard to PCB?

I removed the Li-on chip, shorted USB-VCC to LDO and I can feed ESP-32 is a lot more hot(40°C at least I feel). But still having no output in the terminal... Administrator@WIN-F5GR238P6RA MINGW32 ~ $ python -m serial.tools.miniterm --dtr 0 --rts 0 COM4 115200 --- Miniterm on COM4 115200,8,N,1 --- --...
by yangff
Fri Jun 23, 2017 5:58 am
Forum: Hardware
Topic: What's wrong when I move from breadboard to PCB?
Replies: 7
Views: 14538

Re: What's wrong when I move from breadboard to PCB?

Both RTS/DTR are active low, so to keep them high (ie EN pin high, ESP32 enabled) you will need "miniterm.py --dtr 0 --rts 0 /dev/ttyUSB0 115200" I will try this argument after I get my new LDO. (If you saw the --rts 1 --drt 1 in our docs somewhere, can you please tell me where? Will fix.) It's not...
by yangff
Thu Jun 22, 2017 5:33 pm
Forum: Hardware
Topic: What's wrong when I move from breadboard to PCB?
Replies: 7
Views: 14538

Re: What's wrong when I move from breadboard to PCB?

Thanks a lot. I didn't notice this... I've seen this schematic for ESP8266 in some boards, and when I was drawing them, I read https://github.com/espressif/esptool/wiki/ESP32-Boot-Mode-Selection#automatic-bootloader and it says Make the following connections for esptool.py to automatically enter the...