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rcsta port c18
cause of error may ..
1 error in broadrate timming
2 differance between sign data and unsign data
3 number of stop bit
4 number of bit per transmit
write program to check BOR (Brown Out Reset)
if occure while Erase ...
Erase entire block use higher current than write
data a lot Check your flash memory datasheet
Re: CAN on pic18f458
Try to use loop back mode for test your code
(Careful acceptance filter in Can module )
if your code work you should get data that your send.
if still not work i think your hardware have problem.
This application note frome Microchip
https://ww1.microchip.com/downloads/en/AppNotes/00732a.pdf
code
https://ww1.microchip.com/downloads/en/AppNotes/00732.zip
for imprement bootloader for pic16f87X
I suggest you shoulde start with PIC18F452 or
PIC18F4320
Becase PIC18 memory isn't page memory like
PIC16 that programer not worry about paging
when you write asm . And if you use C pic18
is good choise 4 U.
difference pic16f628 and pic16f628a
PIC16F628 don't have analog comparator module.
PIC16F628A integrated analog comparator.
and Configulation bit pattern are differance.
Programming Pic 16F877
ICSP from microchip have 2 mode
:)
<1> standard programing need condition
1 Vpp 13v on MCLR pin (progamming mode)
2 power 5v-4.2v on Vdd pin
3 ground on Vss pin
4 Data for progaming (Bi-directional)
Call PGD Programming data on RB7 pin
5 Clock for...
R 100 ohm for limit current (VPP 13v) flow to gound.
if you don't add this R it may damage your serail port from over current.
8)
I am not sure. But i think it ok because Serial ICSP circuit is not draw
a lot current to drop voltage. :roll:
USB mass storage help
you need firm ware for mass storage device class.
and you need hard ware for interface with
USB protocal (Called SIE = serial interface engine)
#not a good idear for develop SIE by yourself#
I suggest you use MCU that integrated SIE.
PIC18F452 specification write data to EEPROM used
4ms for write cycle .
If you use C langauge I think you should
use write cycle time =5ms.
So you can write stream data 200 byte/Second
# Design a good hand shake for programing.
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