TI TLV1571

因工作測試的需要
就跟TI申請了TLV1571
焊好連接MCU後
卻發現怎麼都讀不到 Registers

仔細看了SPEC後才發現
要先設定 CR1 才能讀回 CR0/CR1的值
所以文件還是要乖乖看
才不會浪費時間 XD

TLV1571 3V-625Ksps
ADC 最快轉換時間公式
Fs(max) = (1/take clk)*Fclk

CLOCK = 10Mhz
TLV1571 need 16clk conversion

Fs = (1/16)*10Mhz
=625000=0.0000016s

#define TLV_DAT       P0    //tlv1571 data pin
#define TLV_CS        P2_0
#define TLV_WR        P2_1
#define TLV_RD        P2_2
#define TLV_CLK       P2_3
#define TLV_A0        P1_0
#define TLV_A1        P1_1
#define TLV_CSS       P1_2  //tlv1571 cstart

void main()            
{    
    unsigned char temp,i,temp1;

    GPIO_direct_set(IOP0,0xFF);            //P0D = 0xFF;      output
    GPIO_P0S_set(0xFF);                      //P0 output cmos
    GPIO_attribute_set(IOP0,0xFF);        //P0 = 0xFF;     output high 
        
    GPIO_direct_set(IOP1,0xFF);            //P1D = 0xFF;     output
    GPIO_attribute_set(IOP1,0xFF);        //P1 = 0xFF;     output high 

    GPIO_direct_set(IOP2,0xFF);            //P2D = 0xFF;     output 
    GPIO_attribute_set(IOP2,0xFF);        //P2 = 0xFF;     output high        

    GPIO_direct_set(IOP3,0x00);            //P3D = 0x00;     input
    GPIO_attribute_set(IOP3,0xFF);        //P3 = 0xFF;     input pull high       

    while(1)
    {        
        TLV_CS = 0;
        TLV_WR = 0;    
        
        TLV_A0 = 0;  //CR0 REG

        TLV_DAT = 0x00;

        TLV_A0 = 1;  //CR1 REG

        TLV_DAT = 0x00;

        TLV_WR = 1;
        TLV_CS = 1;     

        GPIO_direct_set(IOP0,0x00);   
        GPIO_P0S_set(0xFF);           
        GPIO_attribute_set(IOP0,0xFF);          
        GPIO_direct_set(IOP1,0xFC); 
      
         TLV_CSS = 0;      //START CONVERSION 
        
        TLV_CSS = 1;    

        while(P3_2);   //WAIT TLV1571 INT PIN

        TLV_CS = 0;
        TLV_RD = 0;

        temp = GPIO_read(IOP0);          //READ AD VALUE
        temp1 = GPIO_read(IOP1) & 0x03;

        TLV_RD = 1;
        TLV_CS = 1;
    }

}

這不是標準的8051程式
但用法差不多
請自行理解吧...XD