init.c

改程序用来初始化单片机的各项外设

#include "c8051F040.h"

//sbit ncs=P0^5;
// Peripheral specific initialization functions,
// Called from the Init_Device() function
void Reset_Sources_Init()
{
    WDTCN     = 0xDE;
    WDTCN     = 0xAD;
}

void Timer_Init()
{
    SFRPAGE   = TIMER01_PAGE;
    TMOD      = 0x20;
    CKCON     = 0x10;
    TH1       = 0xFA;
}

void PCA_Init()
{
    SFRPAGE   = PCA0_PAGE;
    PCA0CN    = 0x40;
    PCA0MD    = 0x80;
    PCA0CPM0  = 0x48;
}

void UART_Init()
{
    SFRPAGE   = UART0_PAGE;
    SCON0     = 0x50;
}

void SPI_Init()
{
    SFRPAGE   = SPI0_PAGE;
    SPI0CFG   = 0x70;
    SPI0CN    = 0x01;
    SPI0CKR   = 0xFF;
}

void Port_IO_Init()
{
    // P0.0  -  TX0 (UART0), Open-Drain, Digital
    // P0.1  -  RX0 (UART0), Open-Drain, Digital
    // P0.2  -  SCK  (SPI0), Open-Drain, Digital
    // P0.3  -  MISO (SPI0), Open-Drain, Digital
    // P0.4  -  MOSI (SPI0), Open-Drain, Digital
    // P0.5  -  Unassigned,  Push-Pull,  Digital
    // P0.6  -  Unassigned,  Push-Pull,  Digital
    // P0.7  -  Unassigned,  Open-Drain, Digital

    // P1.0  -  Unassigned,  Open-Drain, Digital
    // P1.1  -  Unassigned,  Open-Drain, Digital
    // P1.2  -  Unassigned,  Open-Drain, Digital
    // P1.3  -  Unassigned,  Open-Drain, Digital
    // P1.4  -  Unassigned,  Open-Drain, Digital
    // P1.5  -  Unassigned,  Open-Drain, Digital
    // P1.6  -  Unassigned,  Open-Drain, Digital
    // P1.7  -  Unassigned,  Open-Drain, Digital

    // P2.0  -  Unassigned,  Open-Drain, Digital
    // P2.1  -  Unassigned,  Open-Drain, Digital
    // P2.2  -  Unassigned,  Open-Drain, Digital
    // P2.3  -  Unassigned,  Open-Drain, Digital
    // P2.4  -  Unassigned,  Open-Drain, Digital
    // P2.5  -  Unassigned,  Open-Drain, Digital
    // P2.6  -  Unassigned,  Open-Drain, Digital
    // P2.7  -  Unassigned,  Open-Drain, Digital

    // P3.0  -  Unassigned,  Open-Drain, Digital
    // P3.1  -  Unassigned,  Open-Drain, Digital
    // P3.2  -  Unassigned,  Open-Drain, Digital
    // P3.3  -  Unassigned,  Open-Drain, Digital
    // P3.4  -  Unassigned,  Open-Drain, Digital
    // P3.5  -  Unassigned,  Open-Drain, Digital
    // P3.6  -  Unassigned,  Open-Drain, Digital
    // P3.7  -  Unassigned,  Open-Drain, Digital

    SFRPAGE   = CONFIG_PAGE;
    P0MDOUT   = 0x60;
    XBR0      = 0x06;
    XBR2      = 0x40;
}


void Oscillator_Init()
{
    int i = 0;
    SFRPAGE   = CONFIG_PAGE;
    OSCXCN    = 0x67;
    for (i = 0; i < 3000; i++);  // Wait 1ms for initialization
    while ((OSCXCN & 0x80) == 0);
    CLKSEL    = 0x01;
    OSCICN    = 0x00;
}

// Initialization function for device,
// Call Init_Device() from your main program
void Init_Device(void)
{
    Reset_Sources_Init();
    Timer_Init();
    PCA_Init();
    UART_Init();
    SPI_Init();
    Port_IO_Init();
    Oscillator_Init();
}