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PIC 18F2220 from hell
Hello Folks,
I am a noob when it comes to pic programin. so i am hoping to enlist the help from some of the experts of this forum. I have been having a heck of a time trying to compile a program using PBP 2.50B and MCS+ 3.0.05. I am trying to receive a serial 8N1 formated string @ 38.4K baud and output it at 9.6K baud. When i attempt tocompile i get the following errors:
Code:
Error[108] c:pbp\pbppic18.lib 55 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 55 : Illeagal argument
Error[108] c:pbp\pbppic18.lib 61 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 61 : Illeagal argument
Error[108] c:pbp\pbppic18.lib 67 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 67 : Illeagal argument
Error[108] c:pbp\pbppic18.lib 73 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 73 : Illeagal argument
Error[108] c:pbp\pbppic18.lib 79 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 79 : Illeagal argument
Error[108] c:pbp\pbppic18.lib 85 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 85 : Illeagal argument
Error[108] c:pbp\pbppic18.lib 91 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 91 : Illeagal argument
Error[108] c:pbp\pbppic18.lib 97 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 97 : Illeagal argument
Error[108] c:pbp\pbppic18.lib 103 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 103 : Illeagal argument
Error[108] c:pbp\pbppic18.lib 109 : Illeagal character (=)
Error[124] c:pbp\pbppic18.lib 109 : Illeagal argument
I would appreciate any help and comments.
thank you
here is the code:
Code:
'Configuration Bits
@ INCLUDE "P18F2220.INC" ;processor specific variable definitions
@ LIST P=18F2220 ;directive to define processor and file format
@ __CONFIG _CONFIG1H, _IESO_OFF_1H & _FSCM_OFF_1H & _ECIO_OSC_1H
@ __CONFIG _CONFIG2L, _PWRT_OFF_2L & _BOR_ON_2L & _BORV_27_2L
@ __CONFIG _CONFIG2H, _WDT_OFF_2H & _WDTPS_32K_2H
@ __CONFIG _CONFIG3H, _MCLRE_ON_3H & _PBAD_DIG_3H & _CCP2MX_C1_3H
@ __CONFIG _CONFIG4L, _DEBUG_OFF_4L & _LVP_OFF_4L & _STVR_OFF_4L
' Define Oscilator speed
DEFINE OSC = 20
RCSTA = $FAB
TXSTA = $FAC
SPBRG = $FAF
' Disable Analog Ports
ADCON1 = %00001111 ' Set all ports for digital operation
' Setup Imterups
INTCON = %01000000
data_ready_to_send var bit
UVSSIN var byte
RCTOUT var byte
'Use any spare port bits for flow control.
flow_control_input var PORTB.4
flow_control_output var PORTB.5
' Configure the flow-control pins as one input and one output.
TRISB.4 = 1
TRISB.5 = 0
TRISC.6 = 0 ' Setup pin RC6 to transmit
TRISC.7 = 1
' Assert the flow-control output to enable receiving data on the serial port.
flow_control_output = 0
data_ready_to_send = 0
loop:
' The main program loop.
gosub receive_serial_data
gosub transmit_serial_data
GOTO loop
receive_serial_data:
if (PIR1.5 = 1) then
' Tell the remote computer to stop sending data .
flow_control_output = 1
Poke SPBRG, 32
' A byte has arrived at the serial port. Read it.
SERIN2 PORTC.6,32774,[RCTOUT]
else
data_ready_to_send = 1
endif
return
transmit_serial_data:
if (data_ready_to_send = 1) then
' A byte is ready to send on the serial port.
if (flow_control_input = 0) then
' The flow control input is asserted.
Poke SPBRG, 129 ' Set baud rate to 9600
data_ready_to_send = 0
SEROUT2 PORTC.7\PORTC.4,84,[RCTOUT]
' Tell the remote computer it's OK to send more data.
flow_control_output = 0
endif
endif
return
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Hi and welcome here.
There's a few things you have to change and delete. Let's see
Code:
@ INCLUDE "P18F2220.INC" ;processor specific variable definitions
@ LIST P=18F2220 ;directive to define processor and file format
you don't need them, PBP do it for you, just delete those lines above
must be written like
However, with this changed, you'll also need to change your OSC mode in your config fuses... and then you'll probably have a list of Error[118]... read the following thread (at least post 1 and 5)
http://www.picbasic.co.uk/forum/showthread.php?t=543
Code:
RCSTA = $FAB
TXSTA = $FAC
SPBRG = $FAF
kinda hard to fit a 12bit result in a 8bit register ;) Your program don't use the USART as it use a bit-banged solution (SERIN2/SEROUT2). If you want to use the USART, have a look in your manual for HSEROUT/HSERIN
HTH
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Hello Steve,
Thank you for your reply. I was not sure if i need those first two lines of code. I will apply your recommendations when i get home.
Using HSERIN, will it read data @ 38.4K assuming I DEFINE the correct BAUD and SPBRG?
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Yes it will work. In fact you can change the baudrate on the fly if you need. If you do so, you'll need to change the SPBRG value.
Have a look at my PicMultiCalc, kinda handy stuff to calculate the SPBRG register
Download it here
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Hello Steve,
Your advice was right on. Thank you for taking the time to respond. Wihile i am fairly new to this forum, I have learned a lot from you and others who contribute to this forum regularly. The PicMultiCalc tool was very useful i will make good use of it. Thanks again.:D
