K230 Color Recognition

K230 and MSPM0 Communication

1. Experiment Prerequisites

This tutorial uses the MSPM0G3519 development board. The corresponding example path is 【14.export\MSPM0-K230\01_k230_color_detect】.

K230 needs to run the 【14.export\CanmvIDE-K230\01.color_detect.py】 program to start the experiment. It is recommended to download as an offline running program.

Items needed:

Windows system computer MSPM0G3519 development board K230 vision module (with TF card burned with image) Two type-C data cables Connection cables

2. Experiment Wiring

3. Main Code Explanation

​x
void Pto_Data_Parse(uint8_t *data_buf, uint8_t num)
{
    uint8_t pto_head = data_buf[0];
    uint8_t pto_tail = data_buf[num-1];
    if (!(pto_head == PTO_HEAD && pto_tail == PTO_TAIL))
    {
        sprintf(print_buf, "pto error:pto_head=0x%02x , pto_tail=0x%02x\n", pto_head, pto_tail);
        uart0_send_string(print_buf);
        return;
    }
    uint8_t data_index = 1;
    uint8_t field_index[PTO_BUF_LEN_MAX] = {0};
    int i = 0;
    int values[PTO_BUF_LEN_MAX] = {0};
    for (i = 1; i < num-1; i++)
    {
        if (data_buf[i] == ',')
        {
            data_buf[i] = 0;
            field_index[data_index] = i;
            data_index++;
        }
    }

    for (i = 0; i < data_index; i++)
    {
        values[i] = Pto_Char_To_Int((char*)data_buf+field_index[i]+1);
    }

    uint8_t pto_len = values[0];

    if (pto_len != num)
    {
        sprintf(print_buf, "pto_len error:%d , data_len:%d\n", pto_len, num);
        uart0_send_string(print_buf);
        return;
    }
    uint8_t pto_id = values[1];
    if (pto_id != PTO_FUNC_ID)
    {
        sprintf(print_buf, "pto_id error:%d, func_id:%d\n", pto_id, PTO_FUNC_ID);
        uart0_send_string(print_buf);
        return;
    }
    int x = values[2];
    int y = values[3];
    int w = values[4];
    int h = values[5];
    sprintf(print_buf, "color:x:%d, y:%d, w:%d, h:%d\n", x, y, w, h);
    uart0_send_string(print_buf);
}

The above function parses K230 data. Only data conforming to the specific protocol can be parsed to get the corresponding data.

Where:

• x: is the x-coordinate of the upper-left corner of the recognized box

• y: is the y-coordinate of the upper-left corner of the recognized box

• w: is the width of the recognized box

• h: is the height of the recognized box

4. Experimental Phenomenon

1. After connecting the wires, run the K230 vision module offline. Connect K230 to CanMV IDE and open the corresponding program. Click 【Save open script to CanMV board (as main.py)】 in the toolbar, then restart K230.

   

2. MSPM0 burns the hex file generated from the example.

3. Set the serial assistant interface as shown in the figure.

4. When the K230 camera image recognizes red color, the serial assistant will print the information transmitted by K230 to MSPM0.

   Where:

   • x: is the x-coordinate of the upper-left corner of the recognized box

   • y: is the y-coordinate of the upper-left corner of the recognized box

   • w: is the width of the recognized box

   • h: is the height of the recognized box

   As shown in the figure below: