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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h> //# isdigit()
#include "hih61xx.h"
#include "deftypes.h"
extern uint16 devicef;
extern void bus_err(int ern);
extern void print_help(void);
extern uchar *xchg_data (uchar *buf, uint8 wrlen, uint8 waitlen, uint8 rdlen);
unsigned char buf[32];
void hih61xx_print_all(void)
{
printf(
"============ HiH61xx interface ===========\n"
"Registers:\n"
" 00: Relative Humidity [%%] (reg: 0x00)\n"
" 01: Temperature [°C] (reg: 0x00)\n"
" 02: Status [hex] (reg: 0x00)\n"
"\n");
}
void hih61xx_conf_set(const uchar *opts) {} //Maybe later
// void hih61xx_get_data(void) //# Get measurement data from device
// {
// buf[0] = 0x00;
// if(write(devicef, buf, 1) != 1){ //# Start the measurement
// bus_err(errno);
// }
// usleep(60*1000); //# Wait 60ms for measurement
// if(read(devicef, buf, 4) != 4){ //# Read the data
// bus_err(errno);
// }
// }
// uchar *xchg_data (uchar *buf, uint8 wrlen, uint8 waitlen, uint8 rdlen){ //# [buf] = 32 byte
// if(write(devicef, buf, wrlen) != wrlen){ //# write one byte to device
// bus_err(errno);
// }
// usleep(waitlen*1000); //# Wait 10ms for reading
// if(read(devicef, buf, rdlen) != rdlen) { //# read the result
// bus_err(errno);
// }
// return buf;
// }
// unsigned char hih61xx_read_status(void){ //# Get device status
static uchar calc_status(uchar *buf){
return ((buf[0] & 0xc0) >> 6); //# He ???
}
//float hih61xx_calc_humidity(float offset){ //# Measure
static float calc_humidity(uchar *buf, float offset){ //# Measure
uint16 raw = 0;
float humidity;
if(calc_status(buf) != 0x01 )
{ //# Data format: |s1,s0,h13,h12|h11,h10,h9,h8|_|h7,h6,h5,h4|h3,h2,h1,h0|_|t13,t12,t11,t10|t9,t8,t7,t6|_|t5,t4,t3,t2|t1,t0,x,x|
raw = ((buf[0] & 0x3f) << 8) + buf[1]; // two msb status, 14bit data
humidity = ((float)raw/(16384 - 2))*100; // humidity = (14bit data / (2^14 -2)) * 100%
}
else
{
humidity = -1.0 ;
}
return (humidity + offset) ;
}
// float hih61xx_read_temp(float offset)
static float calc_temp(uchar *buf, float offset)
{
uint16 raw = 0;
float temp;
if(calc_status(buf) != 0x01 )
{
raw = ((buf[2] << 8) + buf[1]) >> 2; // 14bit temp data
temp = ((float)raw/(16384 - 2))*165 - 40 ; // temp = ((14bit data / (2^14 -2))*165) - 40 [°C]
}
else
{
temp = -40.0 ;
}
return (temp + offset);
}
void hih61xx_read_all(const uchar *opts)
{
//hih61xx_get_data();
buf[0] = 0x00;
xchg_data(buf,1,60,4);
// if(opts != NULL)
// {
// char *ptr;
// printf("00:%f\n", calc_humidity(buf, 0.0));
// ptr++; // One (,) character allowed for delimiter
// printf("01:%f\n", calc_temp(buf, 0.0));
// } else {
printf("00:%f\n", calc_humidity(buf, 0.0));
printf("01:%f\n", calc_temp(buf, 0.0));
// }
printf("02:0x%x\n", calc_status(buf));
}
void hih61xx_read_one(const uchar *opts)
{
uint16 i,id;
uchar temp[256];
buf[0] = 0x00;
xchg_data(buf,1,60,4);
if(opts != NULL){
for(i = 0; i < strlen((char*)opts); i++ ){
if (*(opts+i) == ','){ //# .... conf_set 0x49 thys,-10.5
break;
}else{
if( !isdigit(*(opts+i)) ){ //# Check the register string
printf("The Register address must be an integer!\n");
print_help();
hih61xx_print_all();
exit (EXIT_FAILURE);
}
temp[i] = *(opts+i);
temp[i+1] = '\0';
}
}
id = atoi((char*)temp); //# Convert register to number
strncpy((char*)temp, (char*)opts+i+1, 255); //# Copy remain to temp
// id = strtol ((char*)opts,&ptr,0); //all format allowed
// ptr++; //one separator allowed
switch (id)
{
case 0x00:
printf("%f\n", calc_humidity(buf, atof((char*)temp)) );
break;
case 0x01:
printf("%f\n", calc_temp(buf, atof((char*)temp)) );
break;
case 0x02:
printf("0x%x\n", calc_status(buf));
break;
default:
print_help();
hih61xx_print_all();
exit(EXIT_FAILURE);
}
}
}
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