Dewpointer Опции

[Andrejka]

Hi, I found a schematic of simple temperature, huminidity and dewpoint measuring cicruit. Originally device uses: Sht11 sensor, AT90S8535 MCU, and HD44780 like 20x4 LCD. In my project I replace Sht11 with Sht15 (from Sparkfun), At90s8535 is replaced with newer Atmega8535 (Atmel datasheets say - this is a at90s8535 direct repalcement). But this device working incorrectly, so I have only "Sht11 Monitor" label on LCD, without sensor readings. If possible please help me with source code.

Source project:







URL:
Source project - http://www.embedtronics.com/sht11/sht11.html
Source code - http://www.embedtronics.com/sht11/shtdemo1.c
Schematic - http://www.embedtronics.com/sht11/SHT11Sch.pdf


My device show only this label:



I tried to simulate device in Proteus simulator but this program show the same screen, without sensor readings, only label.


Thank You!

[radu]

hello again
i solve the problem regarding correct parameters
the solution was putting timer 2 to clock system
but remains one problem
how to display data and time
best regards

Сообщение отредактировал radu - Jan 16 2009, 19:18

Эскизы прикрепленных изображений

 

[korobov_michael]

hello again...

First of all, don't use library functions in ISR - they take many cycles to complete. Try to replace the block

Код

sprintf(lcd_buffer,"%02d:%02d:%02d  %02d/%02d/%04d",t.hour, t.minute, t.second, t.date, t.month, t.year);
lcd_gotoxy(0,3);
lcd_puts(lcd_buffer);

by block, for exampe

Код

uint8_t i = 0;

lcd_buffer[i++] = 'H';

lcd_buffer[i++] = 'e';

lcd_buffer[i++] = 'l';

lcd_buffer[i++] = 'l';

lcd_buffer[i++] = 'o';

lcd_gotoxy(0,3);
lcd_puts(lcd_buffer);

and check if you will see the 4-th string.
The second. Sorry for  . Don't place your projects in the C disk It's not a good practice