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+--- Thread: 18F87K90 configuration (/showthread.php?tid=834)
18F87K90 configuration - _Mark_ - 2013-11-06
Hello,
I'm new to this bootloader. I downloaded the latest free version from the forum and did the following changes:
Code:
settings.inc
processor 18F87K90
#define OSCF 18432000
;#define USE_UART1 1
#define USE_UART2 1
#define BAUDRATE 57600
user_code.inc
bsf TRISG, 2
bcf TRISG, 1
bcf ANCON2, 2
devices_PIC18F.inc
ifdef __18F87K90
#include P18F87K90.inc
#define IS_PIC18F 1
#define VALID_DEV 1
#define MAX_FLASH 0x20000
#define RAM_START 0x0
#define RAM_SIZEB 3862
#define DEVICEID 353
#define HAS_UART2 1
#define HAS_EE 1
#define BIGEE 1
#define PAGESIZEW 64
#define ROWSIZEW 64
endif
configuration bits
CONFIG1L 5D
CONFIG1H 08
CONFIG2L 7F
CONFIG2H 7F
CONFIG3L 01
CONFIG3H 8B
CONFIG4L 91
CONFIG5L FF
CONFIG5H C0
CONFIG6L FF
CONFIG6H E0
CONFIG7L FF
CONFIG7H 40Questions:
1) I don't know where to find the in the ds the parameters of the device. In detail: RAM_SIZEB, DEVICEID, PAGESIZEW and ROWSIZEW
2) Am I missing something about the configuration of the serial port?
3) I compiled and successfully programmed the MCU using the PicKit 3. But I cannot connect to the bootloader. In fact the GUI doesn't have the 87K90 model listed. I cannot use this bootloader?
Thanks
Mark
RE: 18F87K90 configuration - _Mark_ - 2013-11-06
One step forward, I had to explicitly copy the configuration bit into the code. It seems it doesn't read them from the IDE.
Now the baudrate is ok and the UART transmits fine (tested).
The problem is the RC2IF bit is not set when a char is received! Perhaps I'm missing something other during initialization?
RE: 18F87K90 configuration - _Mark_ - 2013-11-06
Well, the problem of the UART2 was related to a missing banksel instruction.
Now I can enter the bootloader and download the firmware using the GUI.
Of course it thinks I'm using an 87K22....
There are no errors but the application downloaded is not fully-functional and the bootloader is not executed anymore.
Is it due to some differences between 87K22 and 87K90?
The manual says for PIC18F I don't have to change anything in my application, is it true?
I will really appreciate an answer
Thanks in advance
I don't know why but it seems it works now.
I checked the "write config" and "don't write empty pages".
Honestly I don't understand how those flags did the trick.
RE: 18F87K90 configuration - Mikael Gustavsson - 2013-11-08
Hi,
This may be a problem with RAM banking with the current code. Let me check it out.
BR
Mikael
RE: 18F87K90 configuration - Mikael Gustavsson - 2014-07-19
Hi,
I just re-discovered this thread. Not sure why I answered like I did, you already found out and solved the banksel problem.
The "write config" and "don't write empty pages" options should not affect the application operation assuming you use the application config bits in the boot loader.
Do you still need to check "write config" and "don't write empty pages"?