usb.c

cypress usb口的程序范例希望这个对大家有个启发和帮助.

//----------------------------------------------------------------------------

//
// Switch S1 is connected to P0.2 (Down=Start Movement/Up=Stop Movement)
// Switch S2 is connected to P0.3 (Down=Left Button Down/Up=Left Button Up)
// Switch S3 is connected to P0.4 (Not used)
// 
// LED D1 is connected to P0.5 (Tracks S1: On=Down/Off=Up)
// LED D2 is connected to P0.6 (Tracks S2: On=Down/Off=Up)
// LED D3 is connected to P1.3 (Not used)
// 
//----------------------------------------------------------------------------

#include <m8c.h>        // part specific constants and macros
#include "PSoCAPI.h"    // PSoC API definitions for all User Modules

// Constant for button handling
#define GO        1
#define STOP      0
#define UP        0
#define DOWN      1

// Constants for the mouse reports
#define STEP_SIZE 1
#define X_SIGN    (1)
#define Y_SIGN    (1)
#define LB_DOWN	1
#define LB_UP	0
// Movement Vectors for the letters U, S, and B

#define STEP(b,y,x)	( b ), \
        (unsigned char)((Y_SIGN)*(y)*(STEP_SIZE)),(unsigned char)((X_SIGN)*(x)*(STEP_SIZE)),0

const BYTE a_logo_vectors[] =
{
  STEP(LB_DOWN, 0x00, 0x00),  //	;1
  STEP(LB_DOWN, 0x00, 0x05),  //	;1
  STEP(LB_DOWN, 0x00, 0x05),  //	;2
  STEP(LB_DOWN, 0x00, 0x05),  //	;3
  STEP(LB_DOWN, 0x00, 0x05),  //	;4
  STEP(LB_DOWN, 0x00, 0x05),  //	;5
  STEP(LB_DOWN, 0x05, 0x05),  //	;6
  STEP(LB_DOWN, 0x05, 0x00),  //	;7
  STEP(LB_DOWN, 0x05, 0x00),  //	;8
  STEP(LB_DOWN, 0x05, 0xFB),  //	;9
  STEP(LB_DOWN, 0x00, 0xFB),  //	;10
  STEP(LB_DOWN, 0x00, 0xFB),  //	;11
  STEP(LB_DOWN, 0x00, 0xFB),  //	;12
  STEP(LB_DOWN, 0x00, 0xFB),  //	;13
  STEP(LB_UP, 0x00, 0xFB),  //	;14  End of 'U'
  STEP(LB_DOWN, 0x23, 0x05),  //	;15
  STEP(LB_DOWN, 0xFB, 0xFB),  //	;16
  STEP(LB_DOWN, 0xFB, 0x00),  //	;17
  STEP(LB_DOWN, 0xFB, 0x00),  //	;18
  STEP(LB_DOWN, 0xFB, 0x05),  //	;19
  STEP(LB_DOWN, 0x00, 0x05),  //	;20
  STEP(LB_DOWN, 0x05, 0x05),  //	;21
  STEP(LB_DOWN, 0x05, 0x00),  //	;22
  STEP(LB_DOWN, 0x05, 0x00),  //	;23
  STEP(LB_DOWN, 0x05, 0x05),  //	;24
  STEP(LB_DOWN, 0x00, 0x05),  //	;25
  STEP(LB_DOWN, 0xFB, 0x05),  //	;26
  STEP(LB_DOWN, 0xFB, 0x00),  //	;27
  STEP(LB_DOWN, 0xFB, 0x00),  //	;28
  STEP(LB_DOWN, 0xFB, 0xFB),  //	;29
  STEP(LB_UP, 0x05, 0x05),  //	;30
  STEP(LB_DOWN, 0x1E, 0x00),  //	;31
  STEP(LB_DOWN, 0x05, 0x00),  //	;32
  STEP(LB_DOWN, 0x05, 0x00),  //	;33
  STEP(LB_DOWN, 0x05, 0x00),  //	;34
  STEP(LB_DOWN, 0x05, 0xFB),  //	;35
  STEP(LB_DOWN, 0x00, 0xFB),  //	;36
  STEP(LB_DOWN, 0xFB, 0xFB),  //	;37
  STEP(LB_DOWN, 0xFB, 0x00),  //	;38
  STEP(LB_DOWN, 0xFB, 0x00),  //	;39
  STEP(LB_DOWN, 0xFB, 0x00),  //	;40
  STEP(LB_DOWN, 0x0F, 0x00),  //	;41
  STEP(LB_DOWN, 0x05, 0xFB),  //	;42
  STEP(LB_DOWN, 0x00, 0xFB),  //	;43
  STEP(LB_DOWN, 0xFB, 0xFB),  //	;44
  STEP(LB_DOWN, 0xFB, 0x00),  //	;45
  STEP(LB_DOWN, 0xFB, 0x00),  //	;46
  STEP(LB_DOWN, 0xFB, 0x00),  //	;47
  STEP(LB_DOWN, 0x00, 0x05),  //	;48
  STEP(LB_DOWN, 0x00, 0x05),  //	;49
  STEP(LB_DOWN, 0x00, 0x05),  //	;50
  STEP(LB_DOWN, 0x00, 0x05),  //	;51
  STEP(LB_DOWN, 0x00, 0x05),  //	;52
  STEP(LB_DOWN, 0x00, 0x05),  //	;53
  STEP(LB_UP, 0x00, 0xE2),    //	;54
  STEP(LB_UP, 0xBA, 0x00),    //	;55
  STEP(LB_UP, 0x00, 0x00)     //    ;56
};
// 
BYTE left_button;
BYTE move;
BYTE a_ram[4];
const unsigned char *p_data;
void main()
{
    USB_Start(0);        // Enable USB
    M8C_EnableGInt;      //  and Global Interrupts
    
	while (USB_bGetConfiguration() == 0)    // Wait for USB enumeration
    {}
    
    p_data = &a_logo_vectors[0]; // Point to the first of the logo vectors

    move = STOP;
    left_button = UP;
    
    while (1)
    {
        move        = ((P0DATA & 0x04) ? STOP : GO);  // P0.2 Up or Down
        left_button = ((P0DATA & 0x08) ? UP : DOWN);  // P0.3 Up or Down
        if (move == STOP)
            P0DATA |= 0x20;        // P0.5 high (off)
        else
            P0DATA &= ~(0x20);     // P0.5 low (on)
        if (left_button == UP)
            P0DATA |= 0x40;        // P0.6 high (off)
        else
            P0DATA &= ~(0x40);     // P0.6 low (on)

        if (move == GO)
        {
            // Check to see if the endpoint is empty
            if (USB_bGetEPState(1) == IN_BUFFER_EMPTY)
            {
	            a_ram[0] = ((left_button == DOWN) ? *p_data : *p_data & ~(LB_DOWN));
	            p_data++;
	            a_ram[1] = *p_data; p_data++;
	            a_ram[2] = *p_data; p_data++;
	            a_ram[3] = *p_data; p_data++;
	        	if (p_data > &a_logo_vectors[sizeof(a_logo_vectors) - 1])
	        		p_data = &a_logo_vectors[0];
	            USB_LoadEP(1, &a_ram[0], 3);
            }        
        }
    }
}