f326_usb0_touch.c

基于F326单片机的RS232转USB程序

//-----------------------------------------------------------------------------
// F326_USB0_Touch.c
//-----------------------------------------------------------------------------
//
// Source file for routines that touch data.
//


#include "c8051F326.h"
#include "F326_USB0_Touch.h"
#include "F326_USB0_Register.h"
#include "F326_USB0_InterruptServiceRoutine.h"


//-----------------------------------------------------------------------------
// Definitions
//-----------------------------------------------------------------------------

#define SYSCLK             12000000    // SYSCLK frequency in Hz

// USB clock selections (SFR CLKSEL)
#define USB_4X_CLOCK       0x00        // Select 4x clock multiplier, for USB
#define USB_INT_OSC_DIV_2  0x10        // Full Speed
#define USB_EXT_OSC        0x20
#define USB_EXT_OSC_DIV_2  0x30
#define USB_EXT_OSC_DIV_3  0x40
#define USB_EXT_OSC_DIV_4  0x50

// System clock selections (SFR CLKSEL)
#define SYS_INT_OSC        0x00        // Select to use internal oscillator
#define SYS_EXT_OSC        0x01        // Select to use an external oscillator
#define SYS_4X_DIV_2       0x02

//-----------------------------------------------------------------------------
// 16-bit SFR Definitions for 'F326
//-----------------------------------------------------------------------------

sfr16 TMR2RL   = 0xca;                 // Timer2 reload value
sfr16 TMR2     = 0xcc;                 // Timer2 counter


//-----------------------------------------------------------------------------
// Local Definitions
//-----------------------------------------------------------------------------

#define Sw1 0x01                       // These are the port2 bits for Sw1
#define Sw2 0x02                       // and Sw2 on the development board

//-----------------------------------------------------------------------------
// Global Variable Declarations
//-----------------------------------------------------------------------------


// Last packet received from host
unsigned char xdata OUT_PACKET[OUT_PACKET_SIZE] = {0,0,0};

// Next packet to send to host
unsigned char xdata IN_PACKET[IN_PACKET_SIZE]  = {0,0,0,0,0};
//-----------------------------------------------------------------------------
// Local Variable Declarations
//-----------------------------------------------------------------------------

unsigned char SWITCH_1_STATE = 0;      // Indicate status of switch
unsigned char SWITCH_2_STATE = 0;      // starting at 0 == off

unsigned char TOGGLE1 = 0;             // Variable to make sure each button
unsigned char TOGGLE2 = 0;             // press and release toggles switch


//-----------------------------------------------------------------------------
// Local Function Prototypes
//-----------------------------------------------------------------------------

void Sysclk_Init(void);
void Port_Init(void);
void UART_Init(void);
void USB0_Init(void);
void Delay(void);


//-----------------------------------------------------------------------------
// USB0_Init
//-----------------------------------------------------------------------------
//
// Return Value - None
// Parameters - None
//
// - Initialize USB0
// - Enable USB0 interrupts
// - Enable USB0 transceiver
// - Enable USB0 with suspend detection
//
// ----------------------------------------------------------------------------
void USB0_Init(void)
{

   POLL_WRITE_BYTE(POWER,  0x08);      // Force Asynchronous USB Reset
   POLL_WRITE_BYTE(IN1IE,  0x03);      // Enable Endpoint 0-1 in interrupts
   POLL_WRITE_BYTE(OUT1IE, 0x02);      // Enable Endpoint 0-1 out interrupts
   POLL_WRITE_BYTE(CMIE,   0x07);      // Enable Reset, Resume, and Suspend
                                       // interrupts
   USB0XCN = 0xE0;                     // Enable transceiver; select full speed
   POLL_WRITE_BYTE(CLKREC, 0x80);      // Enable clock recovery, single-step
                                       // mode disabled

   EIE1 |= 0x02;                       // Enable USB0 Interrupts
   EA = 1;                             // Global Interrupt enable
                                       // Enable USB0 by clearing the USB
   POLL_WRITE_BYTE(POWER,  0x01);      // Inhibit Bit and enable suspend
                                       // detection

}

//-----------------------------------------------------------------------------
// System_Init(void)
//-----------------------------------------------------------------------------
//
// Return Value - None
// Parameters - None
//
// This top-level initialization routine calls all support routine.
//
// ----------------------------------------------------------------------------
void System_Init(void)
{
   Sysclk_Init();
   Port_Init();
   UART_Init();
}

//-----------------------------------------------------------------------------
// Sysclk_Init
//-----------------------------------------------------------------------------
//
// Return Value - None
// Parameters - None
//
// Initialize system clock to maximum frequency.
//
// ----------------------------------------------------------------------------
void Sysclk_Init(void)
{

	OSCICN |= 0x83;

	CLKMUL  = 0x00;

    CLKMUL |= 0x80;                     // Enable clock multiplier

	Delay();

    CLKMUL |= 0xC0;                     // Initialize the clock multiplier

	while(!(CLKMUL & 0x20));            // Wait for multiplier to lock
	

    CLKSEL = 0x00;                      // Use Clock Multiplier/2 as system clock

}

//-----------------------------------------------------------------------------
// Port_Init
//-----------------------------------------------------------------------------
//
// Return Value - None
// Parameters - None
//
// - Configure the Crossbar and GPIO ports.
//
// ----------------------------------------------------------------------------
void Port_Init(void)
{

   P2MDOUT |= 0x0C;                    // enable LEDs as a push-pull outputs

}

//-----------------------------------------------------------------------------
// Uart_Init
//-----------------------------------------------------------------------------
//
// Return Value - None
// Parameters - None
//
// - Configure the Uart.
//
// ----------------------------------------------------------------------------

void UART_Init()
{
    SCON0     = 0x10;
    SBRLL0    = 0x8F;
    SBRLH0    = 0xFD;
    SBCON0    = 0x43;
	IP        = 0x10;
	IE        = 0x90;
}


//-----------------------------------------------------------------------------
// Delay
//-----------------------------------------------------------------------------
//
// Return Value - None
// Parameters - None
//
// Used for a small pause, approximately 80 us in Full Speed,
// and 1 ms when clock is configured for Low Speed
//
// ----------------------------------------------------------------------------
void Delay(void)
{
   int x;
   for(x = 0;x < 500;x)
      x++;
}