Hi,
This is strange, I am not being able use p0.02 for digital output from sensors on nrf52840-DK but I am able to use all other analog pins for digital output (p0.03, p0.04 etc ..).
Attached is the code snippet where if i use #define DHT11_ONE_WIRE_INPUT_PIN 2 , it will not give readings but if i use #define DHT11_ONE_WIRE_INPUT#define DHT11_ONE_WIRE_INPUT_PIN 4
uint8_t bits[5];
int8_t dht11_dat[5];
#define DHTLIB_TIMEOUT 2
unsigned char DHT11_READ_1_BYTES_DATA(void);
void DHT11_DIR_INPUT(void);
void DHT11_DIR_OUTPUT(void);
void DHT11_START_SEQUENCE(void);
char DHT11_READ_5_BYTES_DATA(void);
unsigned long int ip;
void Convert_Humidity_Temperature_Values(unsigned char byte1);
void DHT_task_callback(void);
unsigned char decimal_value3, decimal_value2,decimal_value1;
unsigned long int Count_micro_second = 0;
unsigned long int test_start_seq1;
unsigned long int test_start_seq2;
unsigned long int test_start_seq3;
unsigned char Humidity_Int;
unsigned char Humidity_DEC;
unsigned char TEMPERATURE_Int;
unsigned char TEMPERATURE_DEC;
unsigned char CHECKSUM;
unsigned char err;
unsigned int TEMPERATURE_VALUE;
unsigned int HUMIDITY_VALUE;
void DHT_task_callback(void)
{
ret_code_t err_code;
NRF_LOG_INFO("get first data\n");
printf("get first data\n");
DHT11_START_SEQUENCE();
DHT11_READ_5_BYTES_DATA();
nrf_delay_ms(500);
}
void DHT11_START_SEQUENCE(void)
{
DHT11_DIR_OUTPUT();
nrf_gpio_pin_write(DHT11_ONE_WIRE_INPUT_PIN, level_1);
//DHT11_ONE_WIRE_OUTPUT_PIN = 1;
nrf_gpio_pin_write(DHT11_ONE_WIRE_INPUT_PIN, level_0);
nrf_delay_ms(25);
//ets_delay_us(22000);
nrf_gpio_pin_write(DHT11_ONE_WIRE_INPUT_PIN, level_1);
// Delay_micro_second(30);
nrf_delay_us(30);
DHT11_DIR_INPUT();
Count_micro_second = 0;
//while(DHT11_ONE_WIRE_INPUT_PIN==0)
while(nrf_gpio_pin_read(DHT11_ONE_WIRE_INPUT_PIN)==0)
{
// printf("waiting for make line high by dht11\n");
Count_micro_second++;
nrf_delay_us(1);
if(Count_micro_second > 100)
{break;}
}
Count_micro_second = 0;
test_start_seq2 = Count_micro_second;
Count_micro_second = 0;
// while(DHT11_ONE_WIRE_INPUT_PIN==1)
while(nrf_gpio_pin_read(DHT11_ONE_WIRE_INPUT_PIN)==1)
{
//printf("waiting for make line low by dht11\n");
Count_micro_second++;
nrf_delay_us(1);
if(Count_micro_second > 100)
{break;}
}
Count_micro_second = 0;
test_start_seq3 = Count_micro_second;
}
unsigned char DHT11_READ_1_BYTES_DATA(void)
{
unsigned int i=0;
unsigned char Return_Value=0;
Count_micro_second = 0;
for(i=0;i<8;i++)
{
Return_Value = Return_Value << 1;
while((nrf_gpio_pin_read(DHT11_ONE_WIRE_INPUT_PIN)) == 0)
{
Count_micro_second++;
nrf_delay_us(5);
if(Count_micro_second > 100)
{break;}
}
Count_micro_second = 0;
while((nrf_gpio_pin_read(DHT11_ONE_WIRE_INPUT_PIN))==1)
{
Count_micro_second++;
nrf_delay_us(5);
if(Count_micro_second > 100)
{break;}
}
if(Count_micro_second<7)
{
Return_Value = Return_Value | 0;
}
else
{
Return_Value = Return_Value | 1;
}
}
// printf("return_value=%c\n",Return_Value);
return Return_Value;
}
void DHT11_DIR_INPUT(void)
{
nrf_gpio_cfg_input(DHT11_ONE_WIRE_INPUT_PIN, NRF_GPIO_PIN_PULLUP);
}
void DHT11_DIR_OUTPUT(void)
{
nrf_gpio_cfg_output(DHT11_ONE_WIRE_INPUT_PIN);
//DHT11_ONE_WIRE_DIR = 1;
}
char DHT11_READ_5_BYTES_DATA(void)
{
Humidity_Int = DHT11_READ_1_BYTES_DATA();
Humidity_DEC = DHT11_READ_1_BYTES_DATA();
TEMPERATURE_Int = DHT11_READ_1_BYTES_DATA();
TEMPERATURE_DEC = DHT11_READ_1_BYTES_DATA();
CHECKSUM = DHT11_READ_1_BYTES_DATA();
// printf("datas = %c %c\n",Humidity_Int,TEMPERATURE_Int);
if (((Humidity_Int + Humidity_DEC + TEMPERATURE_Int + TEMPERATURE_DEC) & 0xff) != CHECKSUM)
{
NRF_LOG_INFO("got wrong values\n");
printf("got wrong values\n");
return 1;
}
else
{
NRF_LOG_INFO("got values\n");
uint16_t humidity_bin = (Humidity_Int << 8) | (Humidity_DEC);
uint16_t temp_bin = (TEMPERATURE_Int << 8) | (TEMPERATURE_DEC);
printf("got values\n");
printf("Humidity1 %d",humidity_bin );
printf("Temperature1 %d", temp_bin );
value[4] = (humidity_bin & 0xFF00) >> 8;
value[5] = (humidity_bin & 0x00FF);
value[6] = (temp_bin & 0xFF00) >> 8;
value[7] = (temp_bin & 0x00FF);
NRF_LOG_INFO("value5: %d ",value[5] );
// printf("Humidity %d",Humidity_Int + Humidity_DEC );
// printf("Temperature %d",TEMPERATURE_Int + TEMPERATURE_DEC );
return err;
}
}
void Convert_Humidity_Temperature_Values(unsigned char byte1)
{
unsigned char intermediate_value1=0; //Varible required while converting the hex value to decimal value
/*******************************************************************************
Procedure to convert 8bit hex value to equivalent BCD value
*******************************************************************************/
decimal_value3=(byte1/100);
intermediate_value1=byte1-(100*decimal_value3);
decimal_value2=(intermediate_value1/10);
decimal_value1=intermediate_value1-(10*decimal_value2);
}
_PIN 3, it will.
Please suggest!
Thanks,
Arshdeep
