Communication (PIC+ADC)<->PC en USB

[kendzo49]

bonsoir tout le monde. je suis à présent sur un projet de conception d'une carte électronique d'acquisition des données montée autour du pic 18F4550. j'ai des difficultés à l'envoie des données à mon pc via usb et la reception correcte des données au pc. j'utilise MikroC comme compilateur. le pic de cette carte doit envoyer des données qu'il a lui même reçu d'un ADC externe à lui. svp aidez moi en me donnant des exemples de programme pic(.hex) dans ce type de situation. Je reste ouvert à toutes suggestions merci d'avance.

cordialement.
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[kendzo49]

PS l'ADC externe dont je parle est le MCP3001

[paulfjujo]

bonjour,


recherche plutot sur le forum mikroelectronika
uù il y a moultes exemples ...

je t'en mets un ici, parmi tant d'autres
je n'ai pas testé perso celui ci
car je n'ai qu'un 18F2550 ( avec moins d epattes) mais bien testé aussi .
qui utilise le HID terminal de mikroC ..

/*
 * Project name:
     HID_Read_Write_Interrupt (Testing the USB HID connection)
 * Copyright:
     (c) Mikroelektronika, 2011.
 * Revision History:
     20110929:
       - initial release (FJ);
 * Description:
     This example establishes connection with the HID terminal that is active
     on the PC. Upon connection establishment, the HID Device Name will appear
     in the respective window. After that software will wait for data and
     it will return received data back.
 * Test configuration:
     MCU:             PIC18F4550
                      http://ww1.microchip.com/downloads/en/DeviceDoc/39632D.pdf
     Dev.Board:       EasyPIC7 - ac:USB
                      http://www.mikroe.com/eng/products/view/757/easypic-v7-development-system/
     Oscillator:      HS, 8.000 MHz  (USB osc. is raised with PLL to 48.000MHz)
     Ext. Modules:    None.
     SW:              mikroC PRO for PIC
                      http://www.mikroe.com/eng/products/view/7/mikroc-pro-for-pic/
 * NOTES:
     (*) Be VERY careful about the configuration flags for the 18F4550 - there's
     so much place for mistake!
    - Place jumpers J12 in the right (USB) position.
 */

unsigned char readbuff[64] absolute 0x510;   // Buffers should be in USB RAM, please consult datasheet
unsigned char writebuff[64] absolute 0x550;

char cnt;
char kk;
void USB_Init_Desc();
const unsigned int USB_VENDOR_ID = 0x1234;
const unsigned int USB_PRODUCT_ID = 0x1234;
const char USB_SELF_POWER = 0xC0;            // Self powered 0xC0,  0x80 bus powered
const char USB_MAX_POWER = 50;               // Bus power required in units of 2 mA
const char HID_INPUT_REPORT_BYTES = 63;
const char HID_OUTPUT_REPORT_BYTES = 63;
const char USB_TRANSFER_TYPE = 0x03;         //0x03 Interrupt
const char EP_IN_INTERVAL = 1;
const char EP_OUT_INTERVAL = 1;
const char USB_INTERRUPT = 1;
const char USB_HID_EP = 1;
const char USB_HID_RPT_SIZE = 57;

/* Device Descriptor */
const struct {
    char bLength;               // bLength         - Descriptor size in bytes (12h)
    char bDescriptorType;       // bDescriptorType - The constant DEVICE (01h)
    unsigned int bcdUSB;        // bcdUSB          - USB specification release number (BCD)
    char bDeviceClass;          // bDeviceClass    - Class Code
    char bDeviceSubClass;       // bDeviceSubClass - Subclass code
    char bDeviceProtocol;       // bDeviceProtocol - Protocol code
    char bMaxPacketSize0;       // bMaxPacketSize0 - Maximum packet size for endpoint 0
    unsigned int idVendor;      // idVendor        - Vendor ID
    unsigned int idProduct;     // idProduct       - Product ID
    unsigned int bcdDevice;     // bcdDevice       - Device release number (BCD)
    char iManufacturer;         // iManufacturer   - Index of string descriptor for the manufacturer
    char iProduct;              // iProduct        - Index of string descriptor for the product.
    char iSerialNumber;         // iSerialNumber   - Index of string descriptor for the serial number.
    char bNumConfigurations;    // bNumConfigurations - Number of possible configurations
} device_dsc = {
      0x12,                   // bLength
      0x01,                   // bDescriptorType
      0x0200,                 // bcdUSB
      0x00,                   // bDeviceClass
      0x00,                   // bDeviceSubClass
      0x00,                   // bDeviceProtocol
      8,                      // bMaxPacketSize0
      USB_VENDOR_ID,          // idVendor
      USB_PRODUCT_ID,         // idProduct
      0x0001,                 // bcdDevice
      0x01,                   // iManufacturer
      0x02,                   // iProduct
      0x03,                   // iSerialNumber
      0x01                    // bNumConfigurations
  };

/* Configuration 1 Descriptor */
const char configDescriptor1[]= {
    // Configuration Descriptor
    0x09,                   // bLength             - Descriptor size in bytes
    0x02,                   // bDescriptorType     - The constant CONFIGURATION (02h)
    0x29,0x00,              // wTotalLength        - The number of bytes in the configuration descriptor and all of its subordinate descriptors
    1,                      // bNumInterfaces      - Number of interfaces in the configuration
    1,                      // bConfigurationValue - Identifier for Set Configuration and Get Configuration requests
    0,                      // iConfiguration      - Index of string descriptor for the configuration
    USB_SELF_POWER,         // bmAttributes        - Self/bus power and remote wakeup settings
    USB_MAX_POWER,          // bMaxPower           - Bus power required in units of 2 mA

    // Interface Descriptor
    0x09,                   // bLength - Descriptor size in bytes (09h)
    0x04,                   // bDescriptorType - The constant Interface (04h)
    0,                      // bInterfaceNumber - Number identifying this interface
    0,                      // bAlternateSetting - A number that identifies a descriptor with alternate settings for this bInterfaceNumber.
    2,                      // bNumEndpoint - Number of endpoints supported not counting endpoint zero
    0x03,                   // bInterfaceClass - Class code
    0,                      // bInterfaceSubclass - Subclass code
    0,                      // bInterfaceProtocol - Protocol code
    0,                      // iInterface - Interface string index

    // HID Class-Specific Descriptor
    0x09,                   // bLength - Descriptor size in bytes.
    0x21,                   // bDescriptorType - This descriptor's type: 21h to indicate the HID class.
    0x01,0x01,              // bcdHID - HID specification release number (BCD).
    0x00,                   // bCountryCode - Numeric expression identifying the country for localized hardware (BCD) or 00h.
    1,                      // bNumDescriptors - Number of subordinate report and physical descriptors.
    0x22,                   // bDescriptorType - The type of a class-specific descriptor that follows
    USB_HID_RPT_SIZE,0x00,  // wDescriptorLength - Total length of the descriptor identified above.

    // Endpoint Descriptor
    0x07,                   // bLength - Descriptor size in bytes (07h)
    0x05,                   // bDescriptorType - The constant Endpoint (05h)
    USB_HID_EP | 0x80,      // bEndpointAddress - Endpoint number and direction
    USB_TRANSFER_TYPE,      // bmAttributes - Transfer type and supplementary information
    0x40,0x00,              // wMaxPacketSize - Maximum packet size supported
    EP_IN_INTERVAL,         // bInterval - Service interval or NAK rate

    // Endpoint Descriptor
    0x07,                   // bLength - Descriptor size in bytes (07h)
    0x05,                   // bDescriptorType - The constant Endpoint (05h)
    USB_HID_EP,             // bEndpointAddress - Endpoint number and direction
    USB_TRANSFER_TYPE,      // bmAttributes - Transfer type and supplementary information
    0x40,0x00,              // wMaxPacketSize - Maximum packet size supported
    EP_OUT_INTERVAL         // bInterval - Service interval or NAK rate
};

const struct {
  char report[USB_HID_RPT_SIZE];
}hid_rpt_desc =
  {
     {0x06, 0x00, 0xFF,       // Usage Page = 0xFF00 (Vendor Defined Page 1)
      0x09, 0x01,             // Usage (Vendor Usage 1)
      0xA1, 0x01,             // Collection (Application)
      0x85, 0x01,             // Report ID=1 (This is a global variable)
      0x15, 0x00,             // Logical Minimum (data bytes in the report may have minimum value = 0. This is a global variable)
      0x26, 0xFF, 0x00,       // Logical Maximum (data bytes in the report may have maximum value = 256. This is a global variable)

  // Input report(ID=1)
      0x19, 0x01,             // Usage Minimum
      0x29, 0xFF,             // Usage Maximum
      0x75, 0x08,             // Report Size: 8-bit field size
      0x95, 0x3F,             // Report Count (63 + 1 byte for the report ID)
      0x81, 0x02,             // Input (Data, Var, Abs)

  // Output report(ID=1)
      0x19, 0x01,             // Usage Minimum
      0x29, 0xFF,             // Usage Maximum
      0x75, 0x08,             // Report Size: 8-bit field size
      0x95, 0x3F,             // Report Count (63 + 1 byte for the report ID)
      0x91, 0x02,             // Output (Data, Var, Abs)
      
      
      0x85, 0x02,             // Report ID=1 (This is a global variable)
      
      // Input report(ID=2)
      0x19, 0x01,             // Usage Minimum
      0x29, 0x08,             // Usage Maximum
      0x75, 0x08,             // Report Size: 8-bit field size
      0x95, 0x01,             // Report Count (1 byte + 1 byte for the report ID)
      0x81, 0x02,             // Input (Data, Var, Abs)
      
      // Output report(ID=2)
      0x19, 0x01,             // Usage Minimum
      0x29, 0x08,             // Usage Maximum
      0x75, 0x08,             // Report Size: 8-bit field size
      0x95, 0x01,             // Report Count (1 byte + 1 byte for the report ID)
      0x91, 0x02,             // Output (Data, Var, Abs)

      0xC0},                   // End Collection
  };

//Language code string descriptor
const struct {
  char bLength;
  char bDscType;
  unsigned int string[1];
  } strd1 = {
      4,
      0x03,
      {0x0409}
    };


//Manufacturer string descriptor
const struct{
  char bLength;
  char bDscType;
  unsigned int string[13];
  }strd2={
    28,           //size of this descriptor string
    0x03,
    {'D','e','n','n','i','s',' ','L','e','p','i','n','e'}
  };

//Product string descriptor
const struct{
  char bLength;
  char bDscType;
  unsigned int string[10];
}strd3={
    22,          //size of this descriptor string
    0x03,
    {'P','I','C','1','8','F','4','5','5','0'}
 };
 //Serial Number descriptor
const struct{
  char bLength;
  char bDscType;
  unsigned int string[6];
}strd4 = {
    14,          //size of this descriptor string
    0x03,
    {'A','B','C','1','2','3'} // Count as two bytes
 };



//Array of configuration descriptors
const char* USB_config_dsc_ptr[1];

//Array of string descriptors
const char* USB_string_dsc_ptr[3];

void USB_Init_Desc(){
  USB_config_dsc_ptr[0] = &configDescriptor1;
  USB_string_dsc_ptr[0] = (const char*)&strd1;
  USB_string_dsc_ptr[1] = (const char*)&strd2;
  USB_string_dsc_ptr[2] = (const char*)&strd3;
  USB_string_dsc_ptr[3] = (const char*)&strd4;
  }
void interrupt(){
   USB_Interrupt_Proc();                  // USB servicing is done inside the interrupt
}

void main(void){
  ADCON1 |= 0x0F;                         // Configure all ports with analog function as digital
  CMCON  |= 7;                            // Disable comparators
  TRISB=0;
  LATB=0;
  HID_Enable(&readbuff,&writebuff);       // Enable HID communication

 while(1){
    while(!HID_Read());                   // Wait for a report
    
    /* Report ID=1 function*/
    if (readbuff[0]==1){                  // If report ID is "1"
    for(cnt=0;cnt<64;cnt++){              // Then copy "text" report over
      writebuff[cnt]=readbuff[cnt];       // To the write buffer
      }
    while(!HID_Write(&writebuff,64));     // And send it back to the PC application
    }
    
     /* Report ID=2 function*/
    if (readbuff[0]==2){                 // If report ID is "2"
    LATB=readbuff[1];                    // Then send next byte to Port B as an "output control"
    writebuff[0]=2;                      // Set the report ID to "2"
    writebuff[1]=0;                      // Set an acknowledgment byte
    while(!HID_Write(&writebuff,2));     // And send an acknowledgment report back to the PC application
}


  }


}

[kendzo49]

Merci paulfjujo je me met toute suite au travail.

[A voir en vidéo sur Futura]

[kendzo49]

Paulfjujo si vous avez un cas de figure pareil avec le Pic 18F2550 svp faites moi part de cela. Merci

[paulfjujo]

exemples autour de la carte Startusb PIC18F2550