SOLVED. Thank you very much.

I have an issue using ESP32-PICO-V3 IO20 (pin 27). When executing, terminal says:

E (317) gpio: gpio_set_direction(263): GPIO number error
E (327) gpio: gpio_set_level(215): GPIO output gpio_num error

Here's the simplest blink example I'm using.


#include <stdio.h>
#include "freertos/FreeRTOS.h ...

Ok, nows working. Thanks a lot.

I know this issue has been reported many times, but I still can't solve it.

Eclipse 2020-12
ESP-IDF v4.2
Espressif IDF 1.0.0.7f8U7ScLblnh87Z6aaB2Gpz036 plugin
Java JDK14
Windows 10

I tried with Eclipse 2020-09, 2019-09. Nothing works.

What can I do?

Thanks for the reply.

I believe you want to send a byte with T and Receive 3 with R.
Correct. I tried with Half-Duplex mode without success, I'm not sure how to configure the spi_transaction_t struct for transmit and then receive. I would like if anyone can provide an example of SPI Master in ...

Hello there,

I'm using SPI communication to interface with an external ADC. I need to send first 1 byte, wait at leas 8us, and then send 3 bytes. I implemented this in 2 different spi_device_transmit (because I need to wait 8us between them).


spi_transaction_t t;
t.flags = SPI_TRANS_USE_TXDATA ...

spi_device_handle_t spi; and spi_transaction_t t; should be declared as global in order to be used from all of the task?

Help with this, please. It crashes.

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_system.h"
#include "driver/gpio.h"

TaskHandle_t myTask1Handle = NULL;
TaskHandle_t myTask2Handle = NULL;

void myTask1(void *pvParameter)
{
while(1)
{
xTaskNotifyGive ...

Thanks for the reply.

So what could be a possible solution, please. With example code would be great.

I've got a problem similar to https://www.esp32.com/viewtopic.php?t=5240 .

I need to send and receive information to an IC over SPI. This task has to be made with specific timing, hence I've got a time routine made with Timer 0 and interrupts.

The problem is when I write spi_device_transmit(spi ...