20Mhz 16F873A UART bootloader

Started by Tim in Piclist14 years ago 1 reply

Hello - I am looking for a 16F873A bootloader that uses the built-in serial port (and ideally without WDT). Shane Tolmie's looks ...

Hello - I am looking for a 16F873A bootloader that uses the built-in serial port (and ideally without WDT). Shane Tolmie's looks most promising to me but his site doesn't have a 20Mhz version. Apparently the 87xA versions use a slightly different algorithm for self-programming so I a


16f877 usart

Started by German Enred in Piclist14 years ago

Hi: I'm making a program. it work across the UART (asyncronus mode), i need this write the 56 registers of n ASIC IC, then...

Hi: I'm making a program. it work across the UART (asyncronus mode), i need this write the 56 registers of n ASIC IC, then it can send a flow of bytes to RCIF, write address (PortD) and at the same time write the value of this address taked of RCIF to PORTB -config d


Hi 16F877 USART

Started by Anonymous in Piclist14 years ago

Hi: I'm making a program. it work across the UART (asyncronus mode), i need this write the 56 registers of n ASIC IC, then it...

Hi: I'm making a program. it work across the UART (asyncronus mode), i need this write the 56 registers of n ASIC IC, then it can send a flow of bytes to RCIF, write address (PortD) and at the same time write the value of this address taked of RCIF to PORTB -config data-(in or


I2C Bootloader

Started by probe2it in Piclist15 years ago

Hi all, I'm trying to write a I2C bootloader for my pic 16f876 project. The original bootloader that i want to adapt is for the...

Hi all, I'm trying to write a I2C bootloader for my pic 16f876 project. The original bootloader that i want to adapt is for the UART port (and work without interrupt). I've a lot of problem working with I2C without interrupt handler (by reading only SSPSTAT and SSPBUF registe


PIC -ISA interfacing weird problem

Started by kalyanramu vemishetty in Piclist13 years ago 1 reply

Hi all, I am interfacing pic microcontroller (pic18f452) to FDC37c672 from SMSC. FDC37c672 has some UART and IrDA capabilities...

Hi all, I am interfacing pic microcontroller (pic18f452) to FDC37c672 from SMSC. FDC37c672 has some UART and IrDA capabilities which I want to explot. It has an ISA bus interface. I am able to read the registers from the FDC37C672. But for some reason I am unable t


Re: 12F675 Startup Problems

Started by dlc in Piclist10 years ago 1 reply

And that start bit depends upon the the stop bit of the previous byte. The longer the string transmitted, the more time drift has to have...

And that start bit depends upon the the stop bit of the previous byte. The longer the string transmitted, the more time drift has to have an effect. I admit that my experiences have to do with _reading_ async serial using the RC oscillator where my bit-banged serial reader is likely more affected by drift than a hardware UART reading any serial that I'm transmitting. DLC smxcu...


FAT file system

Started by Gus in Piclist13 years ago 1 reply

After a long time of work I am finally done with ALFAT. I used ARM chip and programmed it with full FAT file system where you can...

After a long time of work I am finally done with ALFAT. I used ARM chip and programmed it with full FAT file system where you can send SPI or UART(serial) commands to it and it will save FAT files to many kinds of medias SD, MMC, CF and hard disks! I would be more than happ


Shane Tolmie's bootloader problem!

Started by ogarianoxman in Piclist15 years ago

My problems with Shane Tolmie's bootloader v7-6. i am using a PIC 16F877 at 4MHz. I have incorporated a MAX232 with 4.7uF...

My problems with Shane Tolmie's bootloader v7-6. i am using a PIC 16F877 at 4MHz. I have incorporated a MAX232 with 4.7uF capacitors. to test that i have installed serial communication properly i loaded up the program "uart.bas" (from the software section of


Interrupts and GIE

Started by upand_at_them in Piclist12 years ago 7 replies

Is it necessary, or even a good idea, to disable GIE when no interrupts are enabled? I have a UART library that I wrote and one of the...

Is it necessary, or even a good idea, to disable GIE when no interrupts are enabled? I have a UART library that I wrote and one of the functions enables receive interrupts, and turns on GIE. But my function to disable receive interrupts doesn't turn off GIE, because it could be needed for other interrupts. Should I check to see if other in


USART, setting of TRIS register needed (PIC 16F-types) ?

Started by Stef Mientki in Piclist12 years ago 3 replies

I'm a little bit confused about the TX and RX pins in UART mode. I checked several PIC types: If you read the text carefully, you will read...

I'm a little bit confused about the TX and RX pins in UART mode. I checked several PIC types: If you read the text carefully, you will read several times: "bit SPEN () and the TRIS register have to be set in order to configure the TX and RX pins as the USART" Now look at the schematics of the ports, and see that it doesn't matter to set the TRIS register, because the "peripheral OE" w...