Texas Instruments MSP430 User Manual

356
DHT22.c
#include "DHT22.h"
unsigned char values[5];
void DHT22_init(void)
{
DHT22_DIR_IN();
delay_ms(1000);
}
unsigned char DHT22_get_byte(void)
{
unsigned char s = 8;
unsigned char value = 0;
DHT22_DIR_IN();
while(s > 0)
{
value <<= 1;
while(DHT22_IN() == FALSE);
delay_us(30);
if(DHT22_IN())
{
value |= 1;
}
while(DHT22_IN());
s--;
}
return value;
}
unsigned char DHT22_get_data(void)
{
unsigned char chk = FALSE;
unsigned char s = 0;
unsigned char check_sum = 0;
DHT22_DIR_OUT();
DHT22_OUT_HIGH();
DHT22_OUT_LOW();
delay_ms(1);
DHT22_OUT_HIGH();
delay_us(32);
DHT22_DIR_IN();

Texas Instruments MSP430 Specifications

General

Brand	Texas Instruments
Model	MSP430
Category	Microcontrollers
Language	English