Development Desktop and BNO055 custom hardware communication

[zmolnar]

Hi,

I have a custom board in the following setup: PC <--> #USB <--> FT231 <--> #UART <--> uC <--> #I2C <--> BNO055

Is there a way to make this board work with Development Desktop? I could implement the needed firmware in the uC to forward the messages, but I couldn't find anything about the details. I'm not even sure, if it is proprietary info or not.

Could you help me where to start?

Thank you!

[Jet]

Hi Sir:

   I only can suggest you how to connect because I also don't have any experience.

    Maybe you should consider shuttle_id how to connect.  You can get BNO055 shuttle schematic from the following link:

    https://www.bosch-sensortec.com/products/smart-sensors/bno055.html

   And BNO055 shuttle_id is 000011001, corresponds to AX/AY/AZ/AMUX/CODE4-CODE0.

[jabezwinston · Accepted solution]

Yes ! The communucation protocol between Application Board 2.0/BNO USB stick and Development Desktop 2.0 software is proprietary.

But most protocol details are exposed in COINES software source code. You could make use of them ! 😀

[Hint : Check coinesAPI/pc/coines.c and  coinesAPI/pc/coines_defs.h ]

Development Desktop  fetches board information at startup like how coines_get_board_info() would do

Development  Desktop (PC ) sends  AA  06 02 1F 0A 0D
You reply from microcontroller UART as AA 0F 01 00 42 1F 00 19 00 34 00 11 03 0A 0D

The 7 bytes (7 to 13) highlighted in red  are the information bytes

00 19 - Shuttle ID

00 34 - Software ID (Firmware version - v3.4)

00 11 - Hardware ID (Hardware revision - v1.1)

03 - Application Board 2.0

Source : BST-COINES-SD001.pdf

int16_t coines_get_board_info(struct coines_board_info *data)
{
    int16_t rslt;

    if (data == NULL)
        return COINES_E_NULL_PTR;

    comm_intf_init_command_header(COINES_DD_GET, COINES_CMDID_BOARDINFORMATION);
    rslt = comm_intf_send_command(&coines_rsp_buf);
    if (rslt == COINES_SUCCESS)
    {
        data->shuttle_id = (coines_rsp_buf.buffer[6] << ‌‌ | coines_rsp_buf.buffer[7];
        data->hardware_id = (coines_rsp_buf.buffer[8] << ‌‌ | coines_rsp_buf.buffer[9];
        data->software_id = (coines_rsp_buf.buffer[10] << ‌‌ | coines_rsp_buf.buffer[11];
        data->board = coines_rsp_buf.buffer[12];
    }

    return rslt;
}

 
You can do the same for I2C configure/read/write, SPI configure/read/write by checking the following functions

• coines_config_i2c_bus
• coines_write_i2c
• coines_read_i2c
• coines_config_spi_bus
• coines_write_spi
• coines_read_spi
  
  

[zmolnar]

Excellent answer! Thanks a lot, I really appreciate that!