Search found 194 matches

by Vader_Mester
Wed Aug 15, 2018 8:42 am
Forum: General Discussion
Topic: Power amplifier/operational amplifier in ESP32
Replies: 6
Views: 205

Re: Power amplifier/operational amplifier in ESP32

Honestly, I would not use the OPamp in the ESP, rather an external one, or a PIC with a built-in OPamp, which will do the conversion and use either SPI or I2C with the ESP to do the data sharing.
by Vader_Mester
Tue Aug 14, 2018 7:21 am
Forum: General Discussion
Topic: Power amplifier/operational amplifier in ESP32
Replies: 6
Views: 205

Re: Power amplifier/operational amplifier in ESP32

Hello Ahmed, designing with esp-idf you can call "make menuconfig" and set the PA output power, check line 1064 of https://github.com/espressif/esp-idf/blob/master/components/esp32/Kconfig Actually this mentioned section it's not for the OPamp, rather the wifi. I just noticed that the OPa...
by Vader_Mester
Tue Aug 14, 2018 7:10 am
Forum: Documentation
Topic: [Documentation Release] ESP32 Technical Reference
Replies: 32
Views: 24895

Re: [Documentation Release] ESP32 Technical Reference

The ESP32 Technical Reference Manual is now V2.9. - Updated sections 4.2.2, 4.2.3, 4.3.2; - Added registers I2S_FIFO_WR_REG and I2S_FIFO_RD_REG in Section I2S Registers. PDF link to the latest ( same as the link in the first post ) best wishes rudi ;-) Simple question: Why did you remove the temp s...
by Vader_Mester
Thu Aug 09, 2018 6:19 am
Forum: General Discussion
Topic: PSRAM as Flash
Replies: 14
Views: 327

Re: PSRAM as Flash

This was my point whole time. However i would like to avoid using external logic. My second question is about QSPI pinout - if it is possible to change it temporarily, to avoid using external logic (re-route CS pin to PSRAM). I don't think it is possible to change the pinout much, some part of it i...
by Vader_Mester
Wed Aug 08, 2018 6:55 am
Forum: General Discussion
Topic: PSRAM as Flash
Replies: 14
Views: 327

Re: PSRAM as Flash

Mr kgsws_cz, I read through the technical reference ... section 26.3.2.2 - MMU - External Memory and I think you are correct. It seems that external RAM can only be mapped south of 0x4000 0000 which places it in data bus rather that instruction bus. If this is correct, then we can't seem to map to ...
by Vader_Mester
Tue Aug 07, 2018 6:41 am
Forum: General Discussion
Topic: PSRAM as Flash
Replies: 14
Views: 327

Re: PSRAM as Flash

I did ask this several times before with no definitive answer :(

https://esp32.com/viewtopic.php?f=2&t=6277
https://esp32.com/viewtopic.php?f=2&t=6245
by Vader_Mester
Fri Aug 03, 2018 7:46 am
Forum: General Discussion
Topic: Insane 80MHz spi speed on TFT with SPI_DEVICE_NO_DUMMY
Replies: 1
Views: 87

Re: Insane 80MHz spi speed on TFT with SPI_DEVICE_NO_DUMMY

Well done again! Check page ILI9341 datasheet, page 202. There is some possibility to improve tearing by setting some registers in the ILI9341, when using SPI mode. There are some hints here. This is the ILI9341 lib for the Raspberry, and have some useful info. https://github.com/juj/fbcp-ili9341
by Vader_Mester
Thu Aug 02, 2018 5:58 pm
Forum: Showcase
Topic: Video animation with ESP32 - example
Replies: 3
Views: 370

Re: Video animation with ESP32 - example

How the hell did you pull this off?
by Vader_Mester
Thu Aug 02, 2018 10:46 am
Forum: General Discussion
Topic: Please Identify This ESP32 Device
Replies: 3
Views: 145

Re: Please Identify This ESP32 Device

I had the same issue with one of my board.

I solved it by installing the proper driver for the USB-UART chip. Sometimes using the windows default driver won't work.
by Vader_Mester
Thu Aug 02, 2018 9:53 am
Forum: General Discussion
Topic: Please Identify This ESP32 Device
Replies: 3
Views: 145

Re: Please Identify This ESP32 Device

I had the same issue with one of my board.

I solved it by installing the proper driver for the chip. Sometimes using the windows default driver won't work.

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