tlc549_p.c

用C编写的TLC549的驱动源码和应用示例

/* TLC549.C - Real Timer for the Keil Evaluation with 80C51 device*/
/******************************************************************
 Revision history:
        2005/04/20             Arthur Zhu            initial begin
*******************************************************************/

#include <REG51.H>
#include "ex.H"

#define DISP_DLY 4
#define TLC_IDLE 32
#define TLC_DLY  2

unsigned char led_7seg[] = {        /* LED 7 segment data */
                            0x3F,   /* 0  */
                            0x06,   /* 1  */
                            0x5B,   /* 2  */
                            0x4F,   /* 3  */
                            0x66,   /* 4  */
                            0x6D,   /* 5  */
                            0x7D,   /* 6  */
                            0x07,   /* 7  */
                            0x7F,   /* 8  */
                            0x6F,   /* 9  */
                            0x77,   /* Aa */
                            0x7C,   /* Bb */
                            0x39,   /* Cc */
                            0x5E,   /* Dd */
                            0x79,   /* Ee */
                            0x71,   /* Ff */
                            };

/*------------------------ --- Delay_n_us ----- ---------------------*/
void Delay_n_us (unsigned int n_us)
{
    while (n_us--);
}

void disp_led (
               unsigned char dd,
               unsigned char addr1,
               unsigned char addr2
               )
{
    unsigned char temp;
    temp = (dd & 0x0F0) >> 4;
    P0 = led_7seg[temp];
    P2 = addr1;
    Delay_n_us (DISP_DLY);
    temp = dd & 0x0F;
    P0 = led_7seg[temp];
    P2 = addr2;
    Delay_n_us (DISP_DLY);
}

/*------------------------- TLC549 Read ------------------------*/
int TLC549_RD (unsigned char *rdata)   // Use pointer
{
    unsigned char i;
    unsigned char temp;
    temp = TLC549_DOUT;
    *rdata = 0x00;
    *rdata = *rdata | temp;
    for ( i = 0; i < 7; i++ )
    {
        TLC549_IOCLK = 1;
        Delay_n_us (TLC_DLY);
        TLC549_IOCLK = 0;
        Delay_n_us (TLC_DLY);
        temp = TLC549_DOUT;
        *rdata <<= 1;
        *rdata = *rdata | temp;
    }
    TLC549_IOCLK = 1;
    Delay_n_us (TLC_DLY);
    TLC549_IOCLK = 0;
    Delay_n_us (TLC_DLY);
}

void main ()
{
    unsigned char TLC549_data;
    TLC549_CS_ = 0;
    TLC549_RD (&TLC549_data); // Sample data
    TLC549_CS_ = 1;
    Delay_n_us (TLC_IDLE);
    TLC549_CS_ = 0;
    TLC549_RD (&TLC549_data); // Read data
    TLC549_CS_ = 1;
    while (1)
        disp_led (TLC549_data, 0x08, 0x04);
}