Search found 45 matches
- Fri Jul 05, 2024 1:23 pm
- Forum: ESP32 Arduino
- Topic: Using a mutex to access spi from 3 tasks.
- Replies: 0
- Views: 1176
Using a mutex to access spi from 3 tasks.
Hello all. I currently have working code that shares the spi bus between a vs1053 and a TFT on 2 different tasks. Using a SemaphoreHandle_t and xSemaphoreCreateMutex() this works fine. Now I want to access the spi bus for sdcard access from a third task . Can I just use xSemaphoreTake(spiMutex, port...
- Tue Apr 30, 2024 2:50 pm
- Forum: General Discussion
- Topic: portPRIVILEGE_BIT does it do anything on esp32?
- Replies: 2
- Views: 824
Re: portPRIVILEGE_BIT does it do anything on esp32?
Thanks. I read the FreeRTOS thing. I like FreeRTOS a lot, but only have experience on esp32.
You know of any mcu that implements the privilege?
You know of any mcu that implements the privilege?
- Tue Apr 30, 2024 2:30 pm
- Forum: General Discussion
- Topic: portPRIVILEGE_BIT does it do anything on esp32?
- Replies: 2
- Views: 824
portPRIVILEGE_BIT does it do anything on esp32?
Hi all. Searched the forum search (which sucks very hard) and the esp-idf documentation but could not find anything related. I want to know if the `portPRIVILEGE_BIT` setting on a task does anything and if so what? Take for example this piece of code: taskResult = xTaskCreate( serverTask, "serverTas...
- Wed Nov 04, 2020 11:20 am
- Forum: General Discussion
- Topic: ESP-WROVER-KIT V3 physical dimensions
- Replies: 13
- Views: 17347
Re: ESP-WROVER-KIT V3 physical dimensions
Bump.
@ESP_igrr There are still no drawings with the dimensions to find for the dev boards.
Like permal said, these drawings should/could be uploaded to docs.espressif.com.
@ESP_igrr There are still no drawings with the dimensions to find for the dev boards.
Like permal said, these drawings should/could be uploaded to docs.espressif.com.
- Fri Oct 23, 2020 10:20 am
- Forum: Sample Code
- Topic: eStreamPlayer32 - Mediaplayer for Arduino IDE.
- Replies: 0
- Views: 3358
eStreamPlayer32 - Mediaplayer for Arduino IDE.
I made a mediaplayer for esp32 that plays webstreams and your local files from a http server.
The interface is completely web-based.
It compiles in the Arduino IDE.
To browse the local files you need to copy a php script to the http server.
https://github.com/CelliesProjects/eStreamPlayer32
The interface is completely web-based.
It compiles in the Arduino IDE.
To browse the local files you need to copy a php script to the http server.
https://github.com/CelliesProjects/eStreamPlayer32
- Thu May 14, 2020 9:10 am
- Forum: Hardware
- Topic: GPIO drive strength.
- Replies: 6
- Views: 15542
Re: GPIO drive strength.
@bobtidey The resistor (I use 20K) gate -> ground is present. Thanks for the tip about IRF3708, I think I will buy and test some of those. @Saakje If you are using an NPN power transistor, then yes, you will need a resistor and you will pull current into the base. Do you maybe have some background i...
- Sat May 09, 2020 6:03 pm
- Forum: Hardware
- Topic: GPIO drive strength.
- Replies: 6
- Views: 15542
Re: GPIO drive strength.
If you are using an NPN power transistor, then yes, you will need a resistor and you will pull current into the base. Hi Saakje. I am using IRLZ44N mosfets so a gate resistor should be includeed in my opinion. While testing I drove the mosfets a while without gate resistors and no bad things happen...
- Tue Jan 29, 2019 5:14 pm
- Forum: Hardware
- Topic: GPIO drive strength.
- Replies: 6
- Views: 15542
GPIO drive strength.
I read about the increased maximum drive strength on GPIOs and went looking for an example. Could not find one and just tried some code on a MH-ET LIVE minikit. The code compiles and the esp did not blow up! void setup() { pinMode( LED0_PIN, OUTPUT ); pinMode( LED1_PIN, OUTPUT ); pinMode( LED2_PIN, ...
- Fri Apr 27, 2018 7:08 am
- Forum: Hardware
- Topic: Unknown revision esp32? revision (unknown 0xa)
- Replies: 7
- Views: 12252
Re: Unknown revision esp32?
@ESP_Angus & WiFive: Thanks for the explanation. Made things clear. For reference (from https://github.com/espressif/esp-idf/blob/cc2d1fda964afb310c0ffa9b1bf9d2065b7121f2/components/soc/esp32/include/soc/efuse_reg.h#L94-L99 ): /* EFUSE_RD_CHIP_CPU_FREQ_RATED : R/W ;bitpos:[13] ;default: 1'b0 ; */ /*...
- Thu Apr 26, 2018 2:13 pm
- Forum: Hardware
- Topic: Unknown revision esp32? revision (unknown 0xa)
- Replies: 7
- Views: 12252
Unknown revision esp32? revision (unknown 0xa)
Today I received some new MH-ET mini kits . With esptool 2.3.1 ( on Linux Mint 17.2 Rafaela ) I get this output when I flash the chip: Connecting..... Chip is ESP32D0WDQ6 (revision (unknown 0xa) Features: WiFi, BT, Dual Core, VRef calibration in efuse The markings on the RF can are also a bit differ...