EXPORT int dht11Read(int type, int *data)
{
clearLastError();
int ret = -1;
char *dht11Path = (char *) malloc(FILE_PATH_LENGTH);
memset(dht11Path, 0, FILE_PATH_LENGTH);
strcpy(dht11Path, DHT11_PATH);
switch(type) {
case DHT_TEMP:
strcat(dht11Path, "in_temp_input");
ret = readIntValueFromFile(dht11Path);
break;
case DHT_HUMIDITY:
strcat(dht11Path, "in_humidityrelative_input");
ret = readIntValueFromFile(dht11Path);
break;
default:
setLastError("Unsupport dht11 data type %d", type);
break;
}
if (ret != -1) {
*data = ret;
ret = 0;
} else {
setLastError("Invalid dht11 data");
}
free(dht11Path);
return ret;
}
static int pcf8591Read(int channel, int *value)
{
int existFlag = 0;
DIR *d;
struct dirent *de;
char pcfFile[FILE_PATH_LENGTH];
if (!(d = opendir(PCF8591_SYS_PATH))) {
PyErr_SetString(PyExc_RuntimeError, "Fail to opendir pcf8591 directory");
return -1;
}
while ((de = readdir(d))) {
if (de->d_name[0] == '.')
continue;
sprintf(pcfFile, "%s%s/in%d_input", PCF8591_SYS_PATH, de->d_name, channel);
if (access(pcfFile, F_OK) != -1) {
existFlag = 1;
break;
}
}
closedir(d);
if (existFlag == 0) {
PyErr_SetString(PyExc_RuntimeError, "Fail to access pcf8591 sys file");
return -1;
}
if ((*value = readIntValueFromFile(pcfFile)) != -1) {
return 0;
} else {
PyErr_SetString(PyExc_RuntimeError, "Invalid pcf8591 data");
return -1;
}
}
EXPORT int dht11Read(int type, int *data)
{
clearLastError();
int ret = -1;
DIR *d;
struct dirent *de;
if (!(d = opendir(DHT11_SYS_PATH))) {
setLastError("Fail to opendir %s", DHT11_SYS_PATH);
return 0;
}
char dht11File[FILE_PATH_LENGTH];
while ((de = readdir(d))) {
if (de->d_name[0] == '.')
continue;
if (type == DHT_HUMIDITY)
sprintf(dht11File, "%s%s/in_humidityrelative_input", DHT11_SYS_PATH, de->d_name);
else if(type == DHT_TEMP)
sprintf(dht11File, "%s%s/in_temp_input", DHT11_SYS_PATH, de->d_name);
if (access(dht11File, F_OK) != -1) {
break;
}
}
closedir(d);
switch(type) {
case DHT_TEMP:
ret = readIntValueFromFile(dht11File);
break;
case DHT_HUMIDITY:
ret = readIntValueFromFile(dht11File);
break;
default:
setLastError("Unsupport dht11 data type %d", type);
break;
}
if (ret != -1) {
*data = ret;
ret = 0;
} else {
setLastError("Invalid dht11 data");
}
return ret;
}
EXPORT int Hcsr04Read(int *distance)
{
clearLastError();
int ret = HCSR04_MAX_DISTANCE + 1;
char *hcsr04Path = (char *) malloc(FILE_PATH_LENGTH);
memset(hcsr04Path, 0, FILE_PATH_LENGTH);
strcpy(hcsr04Path, HCSR04_PATH);
ret = readIntValueFromFile(hcsr04Path);
*distance = (int)(ret / HCSR04_PER_METRE);
free(hcsr04Path);
return ret;
}
