VSPI or HSPI

[ale1800]

Hi, great work! How do I choose to use HSPI or VSPI on esp32? thanks in advance

[GiovanniRaseraF]

Yout need to configure the esp32 spi with this parameters: If you need to use ESP32 SIM800 i created a fork for that board: ESP32SIM800 MCP2515

#define MISO  19
#define MOSI  23
#define SCK   18
#define SS    5

 // ESP32SIM800 START
    esp_err_t ret;
    spi_bus_config_t buscfg={};
    buscfg.miso_io_num=MISO;
    buscfg.mosi_io_num=MOSI;
    buscfg.sclk_io_num=SCK;
    buscfg.quadwp_io_num=-1;
    buscfg.quadhd_io_num=-1;  

    spi_device_interface_config_t devcfg={};

    devcfg.clock_speed_hz=1*1000*1000,               //Clock out at 1 MHz
    devcfg.mode=0,                                   
    devcfg.spics_io_num=SS,                          //Chip select
    devcfg.queue_size=7,

    //Initialize the SPI bus
    ret=spi_bus_initialize(HSPI_HOST, &buscfg, 1);
    assert(ret==ESP_OK);
    //Attach the MCP2515 to the SPI bus
    ret=spi_bus_add_device(HSPI_HOST, &devcfg, &*spi);
    assert(ret==ESP_OK);
    // ESP32SIM800 END 

[Kunaalkk1]

Hi @GiovanniRaseraF, firstly, thanks for sharing this library. I have a PCB with ESP32 mounted on it, along with MCP2515 CAN Converter. My MISO, MOSI, CLK, SS are 12, 13, 14, 15 respectively, and I can't change that. Please tell me how to use this SPI Host for MCP2515.

P.S. I am using ESP-IDF with the above program in C++ with Arduino as component.

Code:

#include "mcp2515.h"
#include "esp_system.h"
#include "driver/spi_master.h"
#include "Arduino.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"

spi_device_handle_t spi;

struct can_frame frame;

extern "C" void app_main(void)
{
    initArduino();
    MCP2515 spi_can(&spi);

    spi_can.setBitrate(CAN_500KBPS, MCP_8MHZ);
    spi_can.setNormalMode();

    printf("spi_can configured");

    while (true)
    {
        if (spi_can.readMessage(&frame) == MCP2515::ERROR_OK)
        {
            printf("Data received from ID: ");
            printf("%lx", frame.can_id);
        }

        vTaskDelay(10 / portTICK_PERIOD_MS);
    }
}

Regards, Kunaal

[GiovanniRaseraF]

I don't think i am able to help you, what i can tell you is that you in the code you did not configure the spi interface: for example my spi interface in configured in this way

[image: b6ac36cc-30f5-4f35-aa37-83247bc597fd.png]

if you are using my repo code your PINS will be changed to my configuration, so be careful.

This is all I know, if you somehow find the solution please let me know so we can learn together.

GR

Il giorno mer 5 apr 2023 alle ore 08:26 Kunaal Kiran Kumar < @.***> ha scritto:

Hi @GiovanniRaseraF https://github.com/GiovanniRaseraF, firstly, thanks for sharing this library. I have a PCB with ESP32 mounted on it, along with MCP2515 CAN Converter. My MISO, MOSI, CLK, SS are 12, 13, 14, 15 respectively, and I can't change that. Please tell me how to use this SPI Host for MCP2515.

P.S. I am using ESP-IDF with the above program in C++ with Arduino as component.

Code:

include "mcp2515.h"

include "esp_system.h"

include "driver/spi_master.h"

include "Arduino.h"

include "freertos/FreeRTOS.h"

include "freertos/task.h"

spi_device_handle_t spi;

struct can_frame frame;

extern "C" void app_main(void) { initArduino(); MCP2515 spi_can(&spi);

spi_can.setBitrate(CAN_500KBPS, MCP_8MHZ);
spi_can.setNormalMode();

printf("spi_can Configurated");

while (true)
{
    if (spi_can.readMessage(&frame) == MCP2515::ERROR_OK)
    {
        printf("Data received from ID: ");
        printf("%lx", frame.can_id);
    }

    vTaskDelay(10 / portTICK_PERIOD_MS);
}

}

Regards, Kunaal

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Giovanni Rasera

IT Engineer

Huracan Marine s.r.l.

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[Kunaalkk1]

I am sorry about that, @GiovanniRaseraF. I made a mistake, the SPI-CAN converter was not on VSPI, it was on HSPI instead. That is why it was not working. I checked our PCB's schematics and corrected the Configuration. My CAN Controller works perfectly well now.

Thanks.