Once you’ve got all that setup, we can start the programming. Ours was in the project folder under dist > default > production: hex file from your project, click on File > Open/Load File (*.hex) Select the com port and leave everything else as default, then click Apply: Now we just need to load the. We need to tell the program which com port the PIC is connected to, to do this, click on Settings > Serial: Pay particular attention to these options:ĭevice Architecture – PIC10/PIC12/PIC16/PIC18 MCUs Once the program opens, you’ll need to configure it as we have below: #MICROCHIP PIC SERIAL BOOTLOADER ZIP FILE#Unzip the zip file you downloaded and open the Executable Jar File: To do this we are going to need Microchip’s unified bootloader host application, which you can get from here: Now we can download your project to the PIC. You PC should recognise your PIC as a COM port. You can now remove the short between E0 and GND. You’ll know if it is in the bootloader as it will pulse D0. The other way is to short pin E0 to GND and then power up the PIC. If you’ve just programmed the bootloader from step 1 then it will automatically enter the bootloader. There are two ways to enter the bootloader and be ready for programming. #MICROCHIP PIC SERIAL BOOTLOADER CODE#Now that the bootloader is programmed, flashing your code onto the PIC can be done with a simple micro USB cable into the micro USB port on the board. hex file now we can move to the bootloader program, you can download this from the Microchip website Step 3 – Programming using the bootloader Now you can just build your project to create the. Before this is the bootloader that needs to stay on the PIC for programming next time. This makes sure that the code is loaded into memory from address 0x900 onwards. In MPLAB X, open the project settings and got to XC8 Linker > Additional options and set the Code Offset to 0x900. In order to program the PIC using the bootloader, you will need to make a little tweak to your project. Step 2 – Preparing your application for the bootloader You can now disconnect the programming tool as this is no longer needed. Once the PIC programs, it will pulse the LED connected to D0 and it will be running the bootloader. If you are using the PIC18F45K40 then it is 5v, so you can just click OK. It’s basically just saying, you’ve selected a 5v device, make sure the device you’ve got plugged in is 5v. If you get a message that looks like this: Now we are back in the main MPLAB X window we just need to program the PIC, to do this, make sure you board is plugged in and powered and click on the ‘make and program device’ button. You can just click Finish on the next screen, or you can give it a name and different location if you prefer. Then select your hardware tool, like we have below: Then create a new project using a Prebuilt (Hex, Loadable Image) Project. Make sure everything is connected like it would be if you are programming a PIC using MPLAB X. To do this you will need a pic programmer and the MPLAB X software, which we are assuming you have, as this is where you are probably writing your main code. You will need a PIC programmer if you want to load the bootloader onto a blank PIC, but once you have, the programmer is no longer needed. #MICROCHIP PIC SERIAL BOOTLOADER HOW TO#If you’ve already got the bootloader on your PIC and you just want to know how to use it, skip to Step 2 – Using the bootloader. #MICROCHIP PIC SERIAL BOOTLOADER UPDATE#This bootloader enables the UART communications and allows the user to program the PIC with a single cable rather than using an expensive dedicated programmer every time you want to update the code. We have implemented a bootloader on the PIC microcontrollers we use in our development boards (PIC18F45K40). A bootloader is a small piece of code that resides at the start of the memory in a microcontroller that enables extra features.
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