Hi,
I am trying to interface ADC-cs5463 with P89v51rd2 micro controller using "bit banging SPI" code but not getting any result.
I am using below code if any one can see the code and if i am making some mistake or doing wrong than reply me.
Please help me to find the problem.
#include "p89v51rx2.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <math.h>
//-----------------------------------ADC CS5463------------------ sbit nreset = P3^3; //RESET PIN OF CS5463 sbit cs = P3^4; //CHIP SELECT OF CS5463 sbit sclk = P3^7; //SERIAL CLOCK sbit sdo = P3^6; //SERIAL DATA OUT sbit sdi = P3^5; //SERIAL DATA IN
unsigned char sec_cnt=0; unsigned long longVar=0;
unsigned char mdatahigh; unsigned char mdatamid; unsigned char mdatalow;
//--------------------- Functions Related to CS5463 --------------------------------- void init_cs5463(void);
void main(void) {
init_cs5463();//initiallises the cs to function as per our requirements
}
void init_cs5463(void) {
write_to_reg(0x40,PCB,0x80,0x61); //write to config register(0x40)
cs=0;
transfer_byte(0xe8); // start continuous conversions..
cs=1;
//Here is my while loop and try to read the CS5463 register and disply it,but not able //to get any response from the it.
longVar = 0;
while(1)
{
read_a_reg(0x40,(unsigned char *)&longVar);
float2str(longVar,&disp_buffer[4],0);
float2str(mdatahigh,&disp_buffer[16],0);
float2str(mdatamid,&disp_buffer[19],0);
float2str(mdatalow,&disp_buffer[22],0);
void transfer_byte(unsigned char datum) {
unsigned char count,tempbyte;
sclk=0;
tempbyte=0x80;
for(count=0;count<8;count++) {
if(datum & tempbyte) {
sdi=1;
else {
sdi=0;
sclk=1;
tempbyte=tempbyte>>1;
delay(10);
unsigned char receive_byte(void) {
unsigned char count,tempbyte,datal;
datal=0x80;
tempbyte=0;
sdo=1;
if(sdo) {
tempbyte|=datal;
} sclk=1;
datal=datal>>1;
return(tempbyte);
void read_a_reg(unsigned char command,unsigned char * ptr) {
transfer_byte(command);
mdatahigh=receive_byte();
mdatamid=receive_byte();
mdatalow=receive_byte();
*ptr=mdatalow;
ptr++;
*ptr=mdatamid;
*ptr=mdatahigh;
void write_to_reg(unsigned char command,unsigned char high,unsigned char mid,unsigned char low) {
transfer_byte(high);
transfer_byte(mid);
transfer_byte(low);
You should always take care to understand the purpose of a forum before posting.
The purpose of this forum is clearly stated here: http://www.keil.com/forum/
"The Keil Discussion Forum is an open forum where you may post questions and comments about Keil products."
It is not a free consultancy service.
It is not a place where people will do your homework for you.
If you want someone to do your work for you, then you should be posting on sites like these:
" href= "http://www.zintro.com">http://www.zintro.com
Or try http://www.keil.com/condb
"I didn't find any single person who had see my code and give any comment on it"
Then you must be blind!
You have been given plenty of pointers for where you should be focussing your debugging attention:
* That the IO pins are actually working;
* The SPI phase and polarity;
* Timing;
* Correct handling of received data.