Good day! Interested in such a question. There are two PIC18F47J53 microcontrollers with a USB interface. Is it possible to organize data reception and transmission between these microcontrollers via USB? I will be grateful for an example!

Hello everyone! Need help with the implementation or a ready-made library for working with Software UART on mikropascal. When the Tx and Rx pins are connected to different ports. For example, Tx - PORTB.B6, Rx - PORTC.B2. Thanks for any help.

Hello.
There are two options for your problem:
1. There is no connection with the MMS card.
2. The file name is incorrect.

Hi,

I also had variable errors at a certain level of optimization. It worked when this variable was excluded from optimization. The volatile modifier does this.

Hi, Thanks to everyone, everything worked out for me and it works as it should! My bootloader will start at 0x400 (1024 byte). From 0x000 to 0x400 I copy goto main, interrupt and table GOTO. The need to reserve 1024 bytes was caused by the erase flash function FLASH_Erase_1024(). I can’t erase a sma...

hi, I'll bring it up again. The loader I wrote works well if the downloaded program takes up no more than 64K of memory. If it exceeds, a large GOTO table appears. Can you tell me how to copy it to the loader?

Hello. Thanks for your help.
How to make remap USART2 I understand. It will work on pins RD4 and RD5. But I can't understand if I can remap USART1 and how to use it after that? After reading the first post moved new pins USART1 RB6,RC2. It is necessary to make remap USART1 and USART2.

Hi.

Tell me, I need to do remapped USART 1 and USART 2.
Usart 1 - RC0 (Rx), RC1 (Tx)
Usart 2 - RC5 (Rx), RC6 (Tx)

Can I do it? Or I need to use for USART RC6 (Tx) RC7 (Rx). If you can tell me a sample code.
Thanks in advance for your help!

Good afternoon.
I attach the latest version of the project loader and the working program.
TestPrj - blinking LEDs in the scroll of the encoder.
AfterUpdate - copied the firmware after boot loader.
I would be very grateful if you could help.

I wrote the bootloader needed to load the firmware into the flash memory of the controller. The bootloader is 16,240 bytes. It was decided to place the loader at the address: 0x1BFF8. From address 0x0000 to address 0x0128 (296 bytes), unknown to me information of the loader is placed. I can not unde...

That's what I got at the moment: program BootLoadSPI; // MMC module connections var Mmc_Chip_Select:sbit at PORTE.B2; var Mmc_Chip_Select_Direction:sbit at TRISE.B2; var Filename: string[14]; procedure interrupt(); org 0x2C30; begin end; procedure interrupt_low(); org 0x2C60; begin end; Function SDI...

Sorry, wrong explanation. The loader should be placed at the beginning of memory, not at the end.

It should be possible, in sim808 and other works from the GPRS SIM card GPS is a separate module.

Hi, all. I am developing a bootloader for PIC18F47J53. The firmware is stored on the SD card. I can not understand how to go to the execution of my program and how to shift the address of interrupts. The bootloader should be located at address 0x0000. Вот что у меня получилось: program BootLoadSPI; ...

Good day! I am developing a bootloader for the PIC18F47J53. The firmware in the form of a BIN file lies on the SD card. I check for the presence of a new firmware and, if there is, I am installing it. Tell me how to allocate addresses for the functions of the loader? How to go to the execution of th...