Mini-PCIe - PIC18LF2550 - DevBoard

After the last error I now have the new boards these are the final version.

I can now start testing all the functions.

A little Blink WWAN LED - Test on the V1.1 Board (Comments will be translated later), Write the Little Code with mpasm.

main.asm

	;list p=18f2550
	include "p18f2550.inc"
	
	org	0x000800		; Starte Programm
	goto	init
	org     0x000808		; Interuptvector High
	; call or goto blablub
	org	0x000818		; Interuptvector Low
	; call or goto blablub
	org	0x000828		; Erste Rotine auf Adr. 0x820
	
	cblock	0x00			; Variabeln ab 0x00
	t1				; Delay
	t2				; Delay
	t3				; Delay
	endc
	
	#define WPAN	PORTC,0		; WPAN LED
	#define WLAN	PORTC,1		; WLAN LED
	#define WWAN	PORTC,2		; WWAN LED

	include	"portreg.inc"		; Ports einstellen (portreg)
	include "delay.inc"		; Software Delays (delay)
	;include	"i2c.inc"		; I2C Routinen

init
	call	portreg			; Ports einstellen

main    				; Mainschleife
	bsf	WWAN
	call	delay_1s
	bcf	WWAN
	call	delay_1s
	goto	main
	end

delay.inc

delay_1s
	movlw 0x6d
	movwf t1
	movlw 0x5e
	movwf t2
	movlw 0x1a
	movwf t3
loop_1s
	decfsz	t1, 1
	goto	loop_1s
	decfsz	t2, 1
	goto	loop_1s
	decfsz	t3, 1
	goto	loop_1s
	return

portreg	; PORTA
	movlw	B'00000000'		; PortA I/O setzen (1=In, 0=Out) (Reinfolge RB7,RB6...)
	movwf	TRISA			; PortA I/O setzen
	clrf	PORTA
	; PORTB
	clrf	PORTB			; PortB auf 0 setzen
	clrf    LATB			; Data Latch löschen
	movlw	B'00000011'		; PortB I/O setzen (1=In, 0=Out) (Reinfolge RB7,RB6...) (I2C Slave RB7/RB6 = input)
	movwf	TRISB			; PortB I/O setzen
	movlw   B'00001111'		; Alle I/0 Digital
	movwf	ADCON1
	; PORTC
	movlw	B'00000000'		; PortC I/O setzen (1=In, 0=Out) (Reinfolge RC7,RC6...)
	movwf	TRISC			; PortC I/O setzen
	clrf	PORTC			; PortC auf 0 setzen
	return

Wait long Time for the new PCB, Error from me and OSHPark, OSHPark forgets the VIAs and I order in the wrong thickness, i Order new and wait for the New One.

Lock very nice its better as the First Version and not usable.

Can you see whats is not ok ?

- New version V1.3 ordered at OSHPark, some minor improvements, Quartz changed.

- Fix for the Bootloader, the EEPROM is now nullified by default, otherwise the first Programm will not start.

Work on the next version, the first version is usable but not good enough for me.

Changes:

- Other Crystal

- Fix placement pressure

- Fix overlaps on the connector

- Remove Bootloder Jumper (JP1)

- Other Protopads

- Fix minor things in the libs

- More Bling Bling;)

I use the Bootloader V5 from

Http://www.sprut.de/electronic/soft/usboot/usboot.htm (German Page)

Https://goo.gl/Z53QYX (Translated Page)

This starts after the reset when RE3 is at GND, or when the EEPROM cell with the address 0xFE has the value 0xFF.

Drivers / Tools for Windows are included in the USBoot package (Not Tested),

For Linux I use a customized version of fsUSB (http://www.internetking.org/fsusb/), or Piklab.

The device has its own USB ID:

Bus 004 Device 002: ID 04d8: ff0b Microchip Technology, Inc.

PCBs from OSH Park with some layout errors.

- Quartz footprint with too much soldering resist

- Smaller errors in the placement pressure

For initial tests the PCB is usable.

Order a Test Tool for USB, to Test Power consumption, the connection and other things.

https://aliexpress.com/item/Mini-PCI-Express-pcie-pci-express-PCI-E-Wireless-WWAN-to-USB-Adapter-Card-with-SIM/32657444139.html

Long time ago ;(

Order a Proof of Concept PCB, wait for it, ETA ~3-4 Weeks ordert by OSH-Park