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11

கணினி மற்றும் தொழில்நுட்ப செய்திகள் - Computer & Technical Informations / Re: How to Program an 8051 Microcontroller Using Keil

« Last post by SiVa000000 on November 07, 2025, 11:21:41 AM »

Uploading Code to Megawin Microcontroller

As we have already established there are multiple ways to upload the code to the MG82F6D17. Through OCD ICE or ISP Programmer or through UART. We will be showing two methods that include using OCD ICE and UART.

Using OCD ICE Adapter

First to uploading using OCD ICE, connect the OCD pins of the microcontroller to the OCD ICE adapter as shown below-


For MG82F6D17, we will only be using five lines including the VDD and GND. The CLK pin is not used in this case. To open the programmer UI, you can run ICPProgremmer.exe directly from the Database Installer folder from (EN)8051_OCD_ICE_For_Keil_v3.19.0.4.zip file or from the Keil installation directory (for me it was C:\Keil_v5\C51\INC\Megawin\ ICPProgrammer.exe). Select the Correct MCU Part Number



Click “Load File” and choose loading AP(Code) or IAP(Data). “Load File” can be clicked repeatedly to load different files. While loading IAP(Data), users have to key in Address. HEX and BIN data formats are supported for file loading.



Click “Insert ISP-Code” may choose to insert Megawin-provided ISP code or User-defined ISP code. If the ISP function is not needed, this step can be omitted.



H/W Option Setting let you configure ISP memory, IAP memory and fuse bits. Click on Update target to upload the firmware.

12

ஆன்மீகம் - Spiritual / Re: BIBLE VERSE of THE Day ✝️ 🙏

« Last post by MysteRy on November 07, 2025, 10:58:13 AM »

13

ஆன்மீகம் - Spiritual / Re: THOUGHT for Today ✝️🙏

« Last post by MysteRy on November 07, 2025, 10:56:12 AM »

14

கணினி மற்றும் தொழில்நுட்ப செய்திகள் - Computer & Technical Informations / Re: How to Program an 8051 Microcontroller Using Keil

« Last post by SiVa000000 on November 07, 2025, 10:28:59 AM »

💡 LED Blinking Program on Megawin MG82F6D17

Now that we have finished setting up the IDE, let’s get into the coding part. 
Below is the sample LED Blink Code for the MG82F6D17 microcontroller.

Code: [Select]

#include "MG82F6D17_CONFIG.h"
#define MCU_SYSCLK      12000000
#define MCU_CPUCLK      (MCU_SYSCLK)
#define LED_Pin         P33

/*************************************************
µS Delay Function
*************************************************/
void DelayXus(u8 xUs)
{
    while(xUs!=0)
    {
#if (MCU_CPUCLK>=11059200)
        _nop_();
#endif
#if (MCU_CPUCLK>=14745600)
        _nop_();
        _nop_();
        _nop_();
        _nop_();
#endif
#if (MCU_CPUCLK>=16000000)
        _nop_();
#endif
#if (MCU_CPUCLK>=22118400)
        _nop_();
        _nop_();
        _nop_();
        _nop_();
        _nop_();
        _nop_();
#endif
#if (MCU_CPUCLK>=24000000)
        _nop_();
        _nop_();
#endif     
#if (MCU_CPUCLK>=29491200)
        _nop_();
        _nop_();
        _nop_();
        _nop_();
        _nop_();
        _nop_();
#endif
#if (MCU_CPUCLK>=32000000)
        _nop_();
        _nop_();
#endif
        xUs--;
    }
}

/*************************************************
mS Delay Function
*************************************************/
void DelayXms(u16 xMs)
{
    while(xMs!=0)
    {
        DelayXus(200);
        DelayXus(200);
        DelayXus(200);
        DelayXus(200);
        DelayXus(200);
        xMs--;
    }
}

void main ()
{
    System_Init();
    while(1)
    {
        LED_Pin = !LED_Pin;
        DelayXms(500);
    }
}

🧩 Code Explanation

Header and Definitions:

Code: [Select]

#include "MG82F6D17_CONFIG.h"
#define MCU_SYSCLK      12000000
#define MCU_CPUCLK      (MCU_SYSCLK)
#define LED_Pin         P33

In the header section, 
#include "MG82F6D17_CONFIG.h" adds all the necessary SPLs, header files, and definitions for the chip.

#define MCU_SYSCLK 12000000 sets the system oscillator frequency to 12 MHz. 
The CPU frequency is later multiplied using PLL up to 32 MHz (defined as MCU_CPUCLK).

---

⏱ Delay Functions

The delay functions are simple, software-based delays — no timers are used. 
They generate microsecond and millisecond delays using the [_nop_()] instruction. 
The number of [_nop_()] calls depends on the system clock frequency.

Microsecond Delay Function:

Code: [Select]

void DelayXus(u8 xUs)
{
    while(xUs!=0)
    {
        // Frequency-based delay using NOPs
        ...
        xUs--;
    }
}

Millisecond Delay Function: 
This calls the microsecond delay several times to approximate a 1 ms delay.

Code: [Select]

void DelayXms(u16 xMs)
{
    while(xMs!=0)
    {
        DelayXus(200);
        DelayXus(200);
        DelayXus(200);
        DelayXus(200);
        DelayXus(200);
        xMs--;
    }
}

Note: These are software delays, so they are not perfectly accurate — the precision depends on CPU frequency and compiler optimization.

---

🔁 Main Function

The main() function is straightforward because most of the system configuration is handled by the Megawin SPL.

Code: [Select]

void main ()
{
    System_Init();          // Initialize system registers and clock
    while(1)
    {
        LED_Pin = !LED_Pin; // Toggle LED pin
        DelayXms(500);      // Wait for 500 ms
    }
}

System_Init() is part of the Megawin driver and handles clock setup, I/O initialization, and system configuration automatically.

The loop simply toggles the LED connected to P3.3 every 500 ms — making it blink continuously. 

---

Summary

• We used the MG82F6D17 Driver to simplify system setup.
• The LED blink is achieved by toggling P3.3 and using software delay functions.
• In future examples, we will use hardware timers for more accurate delays and better CPU performance.

Now let’s compile the program and see if there are any errors. For that click on Build Target from the Project menu or simply press the F7 key. If there are no errors the IDE will compile the code and generate the HEX file which can be found in the Object folder within the project folder.



That’s it! You’ve successfully written your first LED blinking program for the MG82F6D17 MCU!

15

கணினி மற்றும் தொழில்நுட்ப செய்திகள் - Computer & Technical Informations / Re: How to Program an 8051 Microcontroller Using Keil

« Last post by SiVa000000 on November 07, 2025, 10:18:57 AM »

🚀 Step-by-Step Working Procedure: Schematics for the Blink Example



Added a led and current limiting resistor to the Pin P3.3.


Here is the hardware setup. I used a SSOP to DIP adapter to use it with the breadboard. As shown in the schematics LED is connected to the pin P3.3 through a 2.2K resistor.


You can follow the circuit given above and make the connections, I have built everything on a breadboard and have also connected my programmer to the microcontroller. The set-up looks like this as shown above.

16

கணினி மற்றும் தொழில்நுட்ப செய்திகள் - Computer & Technical Informations / Re: How to Program an 8051 Microcontroller Using Keil

« Last post by SiVa000000 on November 07, 2025, 09:55:24 AM »

🚀 Step-by-Step Working Procedure: First Project – Let’s Blink an LED

To get started, let’s learn how to create a new project for the MG82F6D17 microcontroller in Keil µVision.

Step 1: Create a new folder for your project with your desired name. 
Example: MyFirstProject

Step 2: Inside this folder, create a subfolder named Source. 
Example structure:

Code: [Select]

MyFirstProject\
 ├── Source\

Step 3: Open the MG82F6D17 Driver ZIP file and extract the following files from:

Code: [Select]

Code\Sample\Source
into your newly created Source folder.

Download MG82F6D17 Driver: 
Click here to download the MG82F6D17 Driver



Now open the Keil µVision IDE and select New µVision Project from the Project menu.



Now open the previously created folder, name the project, and click Save as shown below.



Select MG82F6D17 from the list and click OK. 
Note: If it is not shown in the list, check that the database is installed properly or reinstall the database file.



Click on No if prompted to copy the ‘STARTUP.A51’ file.



Now in the µVision window, under Target → Source Group 1, right-click on Source Group 1 and select 
Add New Item to Group 'Source Group 1'.



In the new window, select C File, name the file as Main, select the Source folder we created earlier, and click Add.



Again, in the project window, right-click on Source Group 1 and select 
Add Existing Files to Group 'Source Group 1'.



Select the following files from Source/Driver/Source folder and click Add.



Right-click on Target 1 and select Options for Target 'Target 1' or press ALT + F7 to open the options window.



In the options, window tick Use On-chip ROM and Use On-chip XRAM options



Go to the Output tab and enable Create Hex File option



In the C51 tab selects Included paths and add the following folder location


I you want to use the OCD ICE adapter for Debug and programming make the following changes too and press Ok to close the window.

17

SMS & QUOTES / Re: Just A Reminder For You 🫰

« Last post by MysteRy on November 07, 2025, 09:22:34 AM »

18

உங்கள் சாய்ஸ் - Ungal Choice / Re: உங்கள் சாய்ஸ் - 39

« Last post by Sadham on November 07, 2025, 12:35:32 AM »

Song...Sollividu velli nilave
Movie...Amaidhi padai

Singers::Mano,,Swarnalatha
Lyrics:::Valli
 
Unnai oru pothum ullam maravathu
Naan than vazhdhen
Oh oh oh oh

Intha word enaku romba pidikum

This song dc my  cousin kaga dc panren

TQ FTC  team

19

உங்கள் சாய்ஸ் - Ungal Choice / Re: உங்கள் சாய்ஸ் - 39

« Last post by Mr Black on November 06, 2025, 09:12:24 PM »

Yes

20

இசை தென்றல் / Re: இசை தென்றல் - உங்களின் இசை ரசனைக்கான ஒரு நிகழ்ச்சி

« Last post by DineshDk on November 06, 2025, 08:21:30 PM »

Yes