MCP2200 linux设置

Question

我想在linux中控制MCP2200.

我找到了Text Link并设置了一切.

例如:
我输入控制台

GP3-1

它会将引脚3设置为1.但我不知道在控制台中键入什么

Answer 1

为了控制mcp2200,你需要一个程序为你做这些事情.

USBtoUART对我不起作用,也许你自己必须做一些编码 - 但你可以用它来了解如何连接到mcp2200 hid.

要控制IO,只需设置一个16字节的数组,填充此处描述的数据:http: //ww1.microchip.com/downloads/en/DeviceDoc/93066A.pdf

如果你想控制更多的东西而不是gpios,你将不得不做更多的事情 - 它可以控制的不仅仅是来自linux的mcp2200的gpios.

我做了一些usb跟踪windows配置工具的通信,提取了一些信息,并且 - tadaah,你可以使用自己的pID/vID,制造商和产品字符串.

注意:你可能需要MikeF谈论的HIDAPI.

首先,一些定义:

// NOTE: max. string length for manufacturer / product string is 63 bytes!!

// from usb trace of mcp2200 config tool
#define MCP2200_SECRET_CONFIGURE    0x01
#define MCP2200_CFG_PID_VID     0x00 
#define MCP2200_CFG_MANU        0x01
#define MCP2200_CFG_PROD        0x02

......和一些变量:

unsigned char **mcp2200_manu_string;
unsigned char **mcp2200_prod_string;

制造商字符串的输出消息如下所示

/* configure manufacturer string (16 x 16 bytes):
 *  output buffer:
 * #0: [01 01 00 16 03 58 00 4B 00 72 00 FF FF FF FF FF]
 *       |  |  |  |  |  |  |  |  |  |  |  +-----------+--> Always FF
 *       |  |  |  |  |  |  +-----+-----+-----------------> Always 00
 *       |  |  |  |  |  +-----+-----+--------------------> First 3 Chars of Manufacturer Name / Product Name
 *       |  |  |  |  +-----------------------------------> In #0: 0x03, After #0: 0x00
 *       |  |  |  +--------------------------------------> (Length (Manufacturer Name) * 2) + 2 (after #0: chars of manufacturer name)
 *       |  |  +-----------------------------------------> Counter 0x00 .. 0x0F
 *       |  +--------------------------------------------> MCP2200 Config Bit (MCP2200_CFG_MANU / PROD / VID_PID)
 *       +-----------------------------------------------> MCP2200_SECRET_CONFIGURE from usb trace
 */

如果你把所有这些放在一个函数中,它可能看起来像这样:

void prepare_cfg_strings (char* manu, char* prod) {
    char manuStr[64];
    char prodStr[64];
    unsigned int i, k = 0;
    unsigned char tmp = 0;

    memset (manuStr, 0x00, sizeof(manuStr));
    memset (prodStr, 0x00, sizeof(prodStr));

    // allocate mcp2200_{manu,prod}_string buffer, 2-dim array with 16 x 16 chars
    if (( mcp2200_manu_string = ( unsigned char** )malloc( 16*sizeof( unsigned char* ))) == NULL ) {
        // error
    }
    if (( mcp2200_prod_string = ( unsigned char** )malloc( 16*sizeof( unsigned char* ))) == NULL ) {
        // error
    }

    for ( i = 0; i < 16; i++ )
    {
      if (( mcp2200_manu_string[i] = ( unsigned char* )malloc( 16 )) == NULL ) {
        /* error */ 
      }
      if (( mcp2200_prod_string[i] = ( unsigned char* )malloc( 16 )) == NULL ) {
        /* error */ 
      }
      /* init the rows here */
      memset (mcp2200_manu_string[i], 0x00, sizeof(&mcp2200_manu_string[i]));
      memset (mcp2200_prod_string[i], 0x00, sizeof(&mcp2200_prod_string[i]));
    }

    // manuStr holds (strlen(manuStr) * 2) + 2 in byte[0] and manufacturer string from byte[1] on
    strcpy (&manuStr[1], manu);
    manuStr[0] = ((strlen (&manuStr[1]) * 2) + 2);
    // prodStr holds (strlen(prodStr) * 2) + 2 in byte[0] and product string from byte[1] on
    strcpy (&prodStr[1], prod);
    prodStr[0] = ((strlen (&prodStr[1]) * 2) + 2);

    // build manufacturer / product strings
    for (i=0, k=0; i<16; i++, k+=4) {
        if (i==0) {
            tmp = 0x03;
        } else {
            tmp = 0x00;
        }
        // manufacturer string
        mcp2200_manu_string[i][0] = MCP2200_SECRET_CONFIGURE; 
        mcp2200_manu_string[i][1] = MCP2200_CFG_MANU;
        mcp2200_manu_string[i][2] = i; 
        mcp2200_manu_string[i][3] = manuStr[k];
        mcp2200_manu_string[i][4] = tmp;
        mcp2200_manu_string[i][5] = manuStr[k+1];
        mcp2200_manu_string[i][6] = 0x00;
        mcp2200_manu_string[i][7] = manuStr[k+2];
        mcp2200_manu_string[i][8] = 0x00;
        mcp2200_manu_string[i][9] = manuStr[k+3];
        mcp2200_manu_string[i][10] = 0x00;
        mcp2200_manu_string[i][11] = 0xff;
        mcp2200_manu_string[i][12] = 0xff;
        mcp2200_manu_string[i][13] = 0xff;
        mcp2200_manu_string[i][14] = 0xff;
        mcp2200_manu_string[i][15] = 0xff;

        // product string
        mcp2200_prod_string[i][0] = MCP2200_SECRET_CONFIGURE; 
        mcp2200_prod_string[i][1] = MCP2200_CFG_PROD;
        mcp2200_prod_string[i][2] = i; 
        mcp2200_prod_string[i][3] = prodStr[k];
        mcp2200_prod_string[i][4] = tmp;
        mcp2200_prod_string[i][5] = prodStr[k+1];
        mcp2200_prod_string[i][6] = 0x00;
        mcp2200_prod_string[i][7] = prodStr[k+2];
        mcp2200_prod_string[i][8] = 0x00;
        mcp2200_prod_string[i][9] = prodStr[k+3];
        mcp2200_prod_string[i][10] = 0x00;
        mcp2200_prod_string[i][11] = 0xff;
        mcp2200_prod_string[i][12] = 0xff;
        mcp2200_prod_string[i][13] = 0xff;
        mcp2200_prod_string[i][14] = 0xff;
        mcp2200_prod_string[i][15] = 0xff;
    }
}

在主循环中调用此函数:

prepare_cfg_strings ("MyManufacturerName, "MyProductName");

打开mcp2200的隐藏句柄并将这些东西放在总线上:

// write manufacturer string configuration to usb device
for (i=0; i<16; i++) {
    hid_write (handle, mcp2200_manu_string[i], 16);
}
// write product string configuration to usb device
for (i=0; i<16; i++) {
    hid_write (handle, mcp2200_prod_string[i], 16);
}

如果您想使用自己的VendorID/ProductID刷新mcp2200,请配置您的消息:

// Microchip VID: 0x04d8
//   MCP2200 PID: 0x00df
mcp2200_pid_vid_cfg[] = 01 00 D8 04 DF 00 00 00 00 00 00 00 00 00 00 00
                         |  | +---+ +---+--------------------------------> Product ID (bytes swapped)
                         |  |     +--------------------------------------> Vendor ID (bytes swapped)
                         |  +--------------------------------------------> MCP2200 Config Bit (MCP2200_CFG_VID_PID)
                         +-----------------------------------------------> MCP2200_SECRET_CONFIGURE from usb trace

把它放在公共汽车上:

hid_write (handle, mcp2200_pid_vid_cfg, 16);

玩得开心!

ñ.