大佬们帮忙扫一眼， 我们在调试CS1237-SO 时，在READ_CS1237()中卡死，一直没发现问题出在哪，代码如下：（代码参考了站内的24bit ADC CS1237完整驱动源码,实测可用无bug，只需修改IO口定义 ）
#include "stc8h.h"
#include "intrins.h"
#include "stdio.h"
#include "math.h"
typedef unsigned char u8;
typedef unsigned int u16;
typedef unsigned long u32;
//****************** the ADC define
#define ADC_Bit 24 //ADC effect bit, with +/- bit, total 24 bit
#define CS_CON 0X00 //chip regester innter REF output 10HZ PGA=1 chn A 0X00
sbit DOUT = P1^3;//dat output IO
sbit SCLK = P1^0;//sclk IO
u32 result_for_show;
//****************** end of the ADC define
//****************** others defined
bit T0_450MS_flag = 0;
u8 RXT_data = 0; // for store the UART receive data
pdata u8 A[5];
//*******************************
void CS1237_INIT();
u32 Read_24BIT_AD();
void Config_CS1237();
u8 Read_chip_Config();
u32 Read_CS1237();
void Config_UART();
void Config_TMR0();
void Delay_ms(u8 ms);
void Delay_us(u8 us);
//*********************** delay function
void Delay_ms(u8 ms)
{
u8 delay_base;
while(ms--)
{
_nop_();
delay_base = 1350;
while(delay_base--);
}
}
void Delay_us(u8 us)
{
u8 delay_base;
while(us--)
{
_nop_();
_nop_();
delay_base = 1;
while(delay_base--);
}
}
//************************ set the adc
void Config_CS1237(void) // Config cs1237
{
u8 i;
u8 dat;
u16 count_i=0; // timer overflow
dat = CS_CON; // set chip regester 0100 1000
SCLK = 0; //SCK_0; //sclk pull down
while(DOUT == 1) //chip dat ready for output, sclk == 0, when chip all pull down, means dat ok
{
Delay_ms(5);
count_i++;
if(count_i > 15000)
{
SCLK = 1; //SCK_1;
DOUT = 1; //DAT_1;
return; //timer over flow, break
}
}
for(i=0;i<29;i++)// 1 - 29
{
// One_CLK;
SCLK = 1; //SCK_1;
Delay_us(48);
SCLK = 0; //;SCK_0;
Delay_us(48);
}
SCLK = 1;Delay_us(36);DOUT = 1;SCLK = 0;Delay_us(36);
//SCK_1;NOP30();DAT_1;SCK_0;NOP30();//30
SCLK = 1;Delay_us(36);DOUT = 1;SCLK = 0;Delay_us(36);//31
SCLK = 1;Delay_us(36);DOUT = 0;SCLK = 0;Delay_us(36);//32
SCLK = 1;Delay_us(36);DOUT = 0;SCLK = 0;Delay_us(36);//33
SCLK = 1;Delay_us(36);DOUT = 1;SCLK = 0;Delay_us(36);//34
SCLK = 1;Delay_us(36);DOUT = 0;SCLK = 0;Delay_us(36);//35
SCLK = 1;Delay_us(36);DOUT = 1;SCLK = 0;Delay_us(36);//36
// One_CLK; //37 wirted 0x65
SCLK = 1;Delay_us(48);
SCLK = 0;Delay_us(48);
for(i=0;i<8;i++) // 38 - 45 clk,wirted 8 bit dat
{
SCLK = 1;
Delay_us(48);
if(dat&0x80)
DAT_1;
else
DAT_0;
dat <<= 1;
SCLK = 0;
Delay_us(48);
}
// One_CLK; //46 clk, pull up dat io
SCLK = 1;Delay_us(48);
SCLK = 0;Delay_us(48);
}
u8 Read_chip_Config(void) // reading chip config dat
{
u8 i;
u8 dat=0; // dat from chip regester
u16 count_i=0; // timer cnt
u8 k=0,j=0;
SCK_0; //sclk pull down
while(DOUT == 1) //chip dat ready for output
{
Delay_ms(5);
count_i++;
if(count_i > 15000)
{
SCLK = 1;
DOUT = 1;
return 1; //timer overflow, break
}
}
for(i=0;i<29;i++) // 1 - 29
{
// One_CLK;
SCLK = 1;Delay_us(48);
SCLK = 0;Delay_us(48);
}
SCLK = 1;Delay_us(36);DOUT = 1;SCLK = 0;Delay_us(36);//30
SCLK = 1;Delay_us(36);DOUT = 0;SCLK = 0;Delay_us(36);//31
SCLK = 1;Delay_us(36);DOUT = 1;SCLK = 0;Delay_us(36);//32
SCLK = 1;Delay_us(36);DOUT = 0;SCLK = 0;Delay_us(36);//33
SCLK = 1;Delay_us(36);DOUT = 1;SCLK = 0;Delay_us(36);//34
SCLK = 1;Delay_us(36);DOUT = 1;SCLK = 0;Delay_us(36);//35
SCLK = 1;Delay_us(36);DOUT = 0;SCLK = 0;Delay_us(36);//36
DOUT = 1;
// One_CLK; //37 wirted 0x56
SCLK = 1;Delay_us(48);
SCLK = 0;Delay_us(48);
dat=0;
for(i=0;i<8;i++) // 38 - 45 clk, reading dat
{
// One_CLK;
SCLK = 1;Delay_us(48);
SCLK = 0;Delay_us(48);
dat <<= 1;
if(DOUT == 1)
dat++;
}
// One_CLK; //46 clk, pull up dat io
SCLK = 1;Delay_us(48);
SCLK = 0;Delay_us(48);
return dat;
}
u32 Read_CS1237(void) // reading chip, return +/- dat
{
u8 i;
u32 dat=0; // reading dat
u8 count_i=0; // timer cnt
DOUT = 1; // dat io lock 1, 51 must be do
SCLK = 0; // timer pull dowm
while(DOUT == 1) // dat ready for output
{
Delay_ms(5);
count_i++;
if(count_i > 300)
{
SCLK = 1;
DOUT = 1;
return 0; // timer overflow, break
}
}
DOUT = 1; //dat io lock 1,51 must be do
dat=0;
for(i=0;i<24;i++) // getting 24 bit dat
{
SCLK = 1;
Delay_us(48);
dat <<= 1;
if(DOUT == 1)
dat ++;
SCLK = 0;
Delay_us(48);
}
for(i=0;i<3;i++) // 27 clk input in all
{
// One_CLK;
SCLK = 1;Delay_us(48);
SCLK = 0;Delay_us(48);
}
// DAT_1;
i = 24 - ADC_Bit; //i is the to be delete bit
dat >>= i;
return dat;
}
//***********************config the uart 1#
void Config_UART()
{
SCON = 0X50; // uart 1 working in 8 bit model, baud changeable Bin 0101 0000
T2L = 0XE0; // the baud rate is 9600, main fosc @ 11.0592
T2H = 0XFE;
AUXR |= 0X01; // set tmr2 as the uart 1# baud generator Bin 0000 0001
AUXR |= 0X04; // set tmr2 as 1t model Bin 0000 0100
AUXR |= 0X10; // start the T2 Bin 0001 0000
ES = 1; // enable the interrupt
}
//*********************** the uart 1# send bit data
void Uart_1_Send_data(u8 dat)
{
SBUF = dat;
while(!TI);
TI = 0;
}
//************************the uart 1# send string
void Uart_1_Send_string(char *s)
{
while(*s)
{Uart_1_Send_data(*s++);}
}
//**********************config the tmr0
void Config_TMR0()
{
AUXR |= 0X80;
TMOD &= 0XF0;
TL0 = 0XCD; // 1 ms for timer T0 16BIT AUTO LOAD MODEL @T 11.0592 HZ
TH0 = 0XD4;
TF0 = 0X00;
ET0 = 0X01;
PT0 = 0X01; // set the t0 interrupt as the 1st one
TR0 = 0X01; // start the T0
ET0 = 0X01;
}
//************************* the main
void main()
{
P0M0 = ~0XFF; // P1^0, P1^1 as open drain model, others as pull-push model
P0M1 &= 0X00;
P1M0 = (P1M0 & ~0x04) | 0x01;
P1M1 &= ~0x05;
P2M0 = ~0XFF; // P2 as pull-push model BIN 1111 1111
P2M1 &= 0X00; //M1 = 0, M0 = 1 is pull-push model
P3M0 = ~0XFF; // P3 as pull-push model BIN 1111 1111
P3M1 &= 0X00; //M1 = 0, M0 = 1 is pull-push model
P4M0 = ~0XFF; // P4 as pull-push model BIN 1111 1111
P4M1 &= 0X00; //M1 = 0, M0 = 1 is pull-push model
P5M0 = ~0XFF; // P5 as pull-push model BIN 1111 1111
P5M1 &= 0X00; //M1 = 0, M0 = 1 is pull-push model
Config_UART();
Config_TMR0();
Config_CS1237();
Read_chip_Config();
Read_CS1237();
CS1237_INIT();
ET0 = 1;
EA = 1;
P1 = 0XFF;
Delay_ms(1);
while(1)
{
if(T0_450MS_flag == 1)
{
T0_450MS_flag = 0;
Uart_1_Send_string("Start the ADC process\r\n");
result_for_show = Read_CS1237();
sprintf(A, "%d\r\n", result_for_show);
Uart_1_Send_string(A);
}
}
}
// ************* the tmr0 interrupt 450ms for 1 time adc scan
void TMR0_isr() interrupt 1
{
static u16 tmr0_cnt = 0;
tmr0_cnt++;
if(tmr0_cnt >= 500)
{
tmr0_cnt = 0;
T0_450MS_flag = 1;
}
}
//************* the uart 1# interupt
void UART_1_isr() interrupt 4
{
if(RI)
{
RI = 0;
SBUF = SBUF;
RXT_data = SBUF;
}
if(TI)
{ TI = 0; }
}
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