I am trying to understand ESP32 external interrupts so decided to test "gpio_example_main.c" example found on Github repository: https://github.com/espressif/esp-idf/blob/6517c5033aab27afe491e433d6beeba93dfb1aa7/examples/peripherals/gpio/main/gpio_example_main.c Some definitions are not clear to me:...

Sorry for hijacking the thread. But when I run the above code it gives me this result: ⸮T⸮U⸮⸮⸮2-hal-cpu.c:178] setCpuFrequencyMhz(): PLL: 320 / 4 = 80 Mhz, APB: 80000000 Hz [I][ESP32_timer_count.ino:48] setup(): imu task started [I][ESP32_timer_count.ino:49] setup(): portTICK_PERIOD_MS = 1 [I][ESP32...

OK, I got it. That's because Arduino uses C++, but ESP32 code is written in C.

Hi Everyone, I tried to execute the following example code from the Arduino environment, but it threw a data type error ESP32_freeRTOS_test:50:21: error: cannot convert 'GPIO_INT_TYPE' to 'gpio_int_type_t' in assignment for all GPIO configuration lines. I fixed them by adding the appropriate data ty...

Hi insanoff, The bits of GPIO_IN_REG map to GPIOs 0-31, and the bits of GPIO_IN1_REG map to GPIOs 32 and up. So to access GPIO32, you need to read bit 0 of GPIO_IN1_REG. Same applies to other GPIO-related registers (output, output enable, etc). GPIO_SEL_34 macro in gpio.h is useful mainly for the p...

Hi Folks, I could not find anywhere how to define GRIO's 32-39 using macros. This is how I thought it could be done: REG_WRITE(GPIO_IN1_REG, BIT34); But apparently it is not the case. In gpio.h file it is defined as: #define GPIO_SEL_34 ((uint64_t)(((uint64_t)1)<<34)) Definitely I did not understand...

1. SPI messages are 32 bit messages, I am not sure what is the best way to do it in Arduino IDE. If you have another suggestion other that Arduino, welcome. So far I have not used anything else, but would like to. My answer to my question 1, 32 bit SPI read and write in Arduino: uint32_t SendReques...

In one transaction (I think you call that a frame; the time when CS is active), you can send/receive any amount of bits, from 1 bit all the way up to 16777215 bits (however, you don't have enough RAM to store the latter amount), and anything in between, with a granularity of 1 bit. As such, 32 bits...

SPI itself doesn't have the concept of 'word size', it just reads in a stream of bits. The ESP32 hardware then reformats these bits into 32-bit words, but that's just a method of storing information. As you can store a bitstream that is as big as the ESP32's free memory, the bit size is more-or-les...

Although there is no reply to my question I would like to share my initial thought how 32 bit SPI respond frame can be captured. First the request can be send byte by byte, then the SPI buffer can be read one byte at a time sending dummy loads. uint32_t SendRequest(uint32_t Request) { uint32_t Respo...