Can not search and get value from OneWire Ds18B20 or HDT22/11

Hi,

At the beginning, I work with LCD through i2c (it done), then show up the  temperature of DS18B20 or DHT22/11 through OneWire (1Wire). And I can not get thing done with search device method (notthing show up on LCD because no device through OneWire has been deteced).

In addition, I uploaded a same hex on my real board, I Work fine (detected 1 devices, get ROM CODE, Show temperature...)

Conclusion, Do anyone succeed in searching and show up value with these devices DS18B20 and DHT22/11 or any advice for solution?

Thanks.

Attach the source program, please.

DHT11/22 does not use Dallas 1-Wire protocol, it needs it's own libraries.
There is an example in simulide:
Left_Panel->File_Browser->Examples->Micro->Sensors-Arduino_DHT22
(open serial monitor to see readings)

DS18B20 is not finished, so somethings might not work.
Anyway attached a working example reading 3 devices.

arcachofo wrote:DHT11/22 does not use Dallas 1-Wire protocol, it needs it's own libraries.
There is an example in simulide:
Left_Panel->File_Browser->Examples->Micro->Sensors-Arduino_DHT22
(open serial monitor to see readings)

DS18B20 is not finished, so somethings might not work.
Anyway attached a working example reading 3 devices.

I Agree with you that DHT22/11 code in different method than DS18B20 and DS18B20 have a lot thing to be done with this but please, finished what you have started with DS18B20.

P/S: I have no idea why Sensor in SimulIDE work on Arduio Uno with it LIB belong to? may be someone should try it on WinAVR (trandition code for AVR Chip).

Conclusion, I have just tested same code, same hex in Proteus Simulate, it work fine without any problem and compare with my real board.

Thanks

Defran wrote:Attach the source program, please.

Code:


// main.c

#include "projConfig.h"

// Declare your global variables here
char lcd_buffer[33];
int varTemp;

/* maximum number of DS18B20 connected to the 1 Wire bus */
#define MAX_DEVICES 8

/* DS18B20 devices ROM code storage area */
unsigned char rom_code[MAX_DEVICES][9];

void init(void) {  // init all port
 // Crystal Oscillator division factor: 1
#pragma optsize-
 CLKPR = (1 << CLKPCE);
 CLKPR = (0 << CLKPCE) | (0 << CLKPS3) | (0 << CLKPS2) |
  (0 << CLKPS1) | (0 << CLKPS0);
 #ifdef _OPTIMIZE_SIZE_
#pragma optsize+
 #endif


 // USART initialization
 // Communication Parameters: 8 Data, 1 Stop, No Parity
 // USART Receiver: Off
 // USART Transmitter: On
 // USART Mode: Asynchronous
 // USART Baud Rate: 9600
 UCSR0A = (0 << RXC0) | (0 << TXC0) | (0 << UDRE0) |
 (0 << FE0) | (0 << DOR0) | (0 << UPE0) | (0 << U2X0) |
 (0 << MPCM0);
 UCSR0B = (0 << RXCIE0) | (0 << TXCIE0) | (0 << UDRIE0) |
 (0 << RXEN0) | (1 << TXEN0) | (0 << UCSZ02) |
 (0 << RXB80) | (0 << TXB80);
 UCSR0C = (0 << UMSEL01) | (0 << UMSEL00) | (0 << UPM01) |
 (0 << UPM00) | (0 << USBS0) | (1 << UCSZ01) |
 (1 << UCSZ00) | (0 << UCPOL0);
 UBRR0H = 0x00;
 UBRR0L = 0x33;

 // TWI initialization
 // Mode: TWI Master
 // Bit Rate: 100 kHz
 twi_master_init(100);

 // 1 Wire Bus initialization
 // 1 Wire Data port: PORTC
 // 1 Wire Data bit: 0
 // Note: 1 Wire port settings are specified in the
 // Project|Configure|C Compiler|Libraries|1 Wire menu.
 w1_init();

 // Globally enable interrupts
#asm("sei")

 // I2C LCD Shield initialization for TWI
 // PCF8574 I2C bus address: 0x27
 // LCD characters/line: 16
 lcd_twi_init(0x27, 16);

}

void main(void) {
 // Declare your local variables here
 unsigned char devices;
 unsigned char i, j;

 // Init all port
 init();

 lcd_printfxy(0, 0, "LCD I2C Ds18B20");
 delay_ms(600);
 lcd_clear();

 devices = w1_search(0xf0, rom_code);
 sprintf(lcd_buffer, "%u DS18B20\nDevice detected", devices);
 lcd_puts(lcd_buffer);
 delay_ms(1000);
 lcd_clear();

 // display the ROM codes for each device
 if (devices) {
 for (i = 0; i < devices; i++) {
 sprintf(lcd_buffer, "Device #%u ROM\nCode is:", i + 1);
 lcd_clear();
 lcd_puts(lcd_buffer);
 delay_ms(2000);
 lcd_clear();
 for (j = 0; j < 8; j++) {
 sprintf(lcd_buffer, "%02X ", rom_code[i][j]);
 lcd_puts(lcd_buffer);
 if (j == 3) lcd_gotoxy(0, 1);
 };
 delay_ms(2000);
 };
 } else
 while (1);  // stop here if no devices were found
 lcd_clear();

 lcd_gotoxy(0, 0);
 lcd_puts("Nhiet cam bien");

 while (1) {

 lcd_gotoxy(0, 1);
 varTemp = ds18b20_temperature(&rom_code[0][0]);
 sprintf(lcd_buffer, "%i.%u", varTemp,
  abs(varTemp % 10));
 lcd_puts(lcd_buffer);


 }
}


There are 2 different isues here: DHT22 and DS18B20.
Ideally you should open a topic for each one, but we can continue with both here.

To find what is the problem I need to test your circuit and code.
So I need the circuit and source code for each issue.

The circuit in your first post is for DHT22, but there is no source code.
The source code in your last post is for DS18B20, but there is no circuit.

Also the source code must be complete, if not I can't test it.
The source code in your last post includes another file "projConfig.h" so I can't compile it.

I think you are using DS18B20 code with DHT22 component.
That doesn't work.

The latest working code for DS18B20 is here:
https://simulide.forumotion.com/t607p50-creating-ds18b20

I have worked on it. Unfortunately, I'm still quite busy in order to complete it, but anyway the last code should work in the most cases, arduino libraries and direct coding for 1-wire protocol.

arcachofo wrote:I think you are using DS18B20 code with DHT22 component.
That doesn't work.

At the first time, my schematic is DS18B20. It didn't work then I replace it with DHT22/11 and take a picture (in my real board I included at the first post, I tested DS18B20 in stead of DHT22/11). Sorry about this to make you confused.

In addition, I wrote all my project in CodeVision AVR and even though I  give you the code then you can not compile without license install file. It still has command-line in compile but it checks for license before do all processing.

Sorry about this inconvenience problem. I dont't make a code on WinAVR or Arduino... But I sure that my hex file work on Real board, Proteus simulator and I think that It also works well with SimulIDE if it running in correct programmable device.

P/S: My project larger than permitting size for upload - error code:
Uploaded file is not valid: exceeded attachment maxsize (50 kB).

Ok, now I understand.

It is good to have the source code even if I can't compile, because at least I can see what the code is trying to do.
I guess that CodeVision libraries are propietary and there is no source code available.
Then it is really difficult to know what is going on.

I can dissassemble the hex file and try to understand what is happening, but that is no easy task...

arcachofo wrote:Ok, now I understand.

It is good to have the source code even if I can't compile, because at least I can see what the code is trying to do.
I guess that CodeVision libraries are propietary and there is no source code available.
Then it is really difficult to know what is going on.

I can dissassemble the hex file and try to understand what is happening, but that is no easy task...

I also included main.cof for debug. I hope it will help you to finish DS18B20 simulating device. when all done, I will post this to "project with SimulIDE"

Well, what is the 1-Wire bus? There is an weird signal on C0.

What is exact frequency? Internal 8Mhz?

Is it D18B20 in parasite or external power mode?

Pull up resistor on the bus is way too large. Should be 4.7K at most instead 10K. Although now that shouldn't be an issue.

Finally the problem was not in D18B20 but in AVR pins: PINx register not updating correctly in some cases.
Solved at Rev 1233.

arcachofo wrote:Finally the problem was not in D18B20 but in AVR pins: PINx register not updating correctly in some cases.
Solved at Rev 1233.

That why Arduino work fine instead of avr chip. thanks your hard work