Please help: ADC for PIC18f452 Urgent need.

Dear all,

I am new in mc. I am working with a project for reading analog signal from a sensor and after converting it with PIC18F452 to digital signal, need to display in data logger in pc (i am using stamp plot).

I am using: mikro c pro and mplab ide.

Please help me. It is very urgent for me..

Regards,
Arafat

have a look at Microchip's code examples for the PIC18 and ADC
**broken link removed**

horace1 said:

have a look at Microchip's code examples for the PIC18 and ADC
**broken link removed**

Click to expand...

Thanks for your ref. I need the c code and also could you show me the way of interfacing the digital output from p18F452 with the rs232?

arafat_054 said:

Thanks for your ref. I need the c code and also could you show me the way of interfacing the digital output from p18F452 with the rs232?

Click to expand...

if you look in the Microchip examples you will find C code for the USART
https://ww1.microchip.com/downloads/en/DeviceDoc/USART.zip

horace1 said:

if you look in the Microchip examples you will find C code for the USART
https://ww1.microchip.com/downloads/en/DeviceDoc/USART.zip

Click to expand...

Ok.

I am trying. But as i am new at mc, so, may be i need time. Actually, i am passing hard time with a project part of which is reading data from a sensor and displaying the converted digital signal into PC. I am in the Ocean now.. i am trying with the below code which is for PIC18f4550 (collected from edaboard.com >> https://www.edaboard.com/threads/234369/) but showing error in my compiler. Addition, i need to know how can i put this into pc through RS232.

I need urgent help in this regard for PIC18F452. i am using MPLAB & mikro c compilers...

Regards,
Arafat

I can help you if you zip and upload the schematic of your project. What sensor are you using and what compiler?

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Do you want something like this.

internetuser2k12 said:

I can help you if you zip and upload the schematic of your project. What sensor are you using and what compiler?

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Do you want something like this.

Click to expand...

Please find the attachment.

I need to modify the schematic by replacing the PICAXE with PIC18F452. And the code is found from edaboard.com i mentioned previous reply..

Thanks.

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Yes. I need a conversion like you post. I will also need to display in PC with a data logger (i m trying with stamp plot). I also got some help from a friend... he send me the below code:

unsigned int temp_res;
unsigned char text[6];
void main()
{
int len=0;
UART1_Init(9600); // Initialize UART module at 9600 bps
Delay_ms(100); // Wait for UART module to stabilize
do
{
temp_res = ADC_Read(2); // Get 10-bit results of AD conversion
if(temp_res>999)
len = 1;
else if(temp_res<1000 && temp_res>99)
len = 2;
else if(temp_res<100 && temp_res>9)
len = 3;
else
len = 4;
WordToStr(temp_res,text);
UART1_Write_Text(text+len);
UART1_Write(13);
Delay_ms(1000);
} while(1);
}

with mikro c i compiled this to hex with no error. Then loaded to MCU. I m using a dev board for PIC18F452.
Any more help from you is highly appreciated.

Thanks.

Your code is OK. Check the attachement. Are you sure that your 741 op amp circuit gives an output from 0-5V?