PIC 18F8722 Hserin2/Hserout2 problems

[fgcity]

Hi everyone.

I am having problems sending and receiving data through the second serial port of the 18F8722 PIC.

My Fuses and declares are as follows:

XTAL 10
        
'Fuse Configuration    
CONFIG_START
    OSC = HSPLL    ;High Speed with PLL
    FCMEN = OFF    ;Fail-Safe Clock Monitor disabled
    IESO = OFF    ;Two-Speed Start-up disabled
    PWRT = On    ;PWRT disabled
    BOREN = SBORDIS    ;Brown-out Reset enabled in hardware only (SBOREN is disabled)
    BORV = 0    ;Minimum setting
    WDT = Off    ;WDT enabled
    WDTPS = 1024    ;1:1,024
    MODE = MC    ;Microcontroller mode
    ADDRBW = ADDR16BIT    ;20-bit Address Bus
    DATABW = DATA16BIT    ;16-bit External Bus mode
    Wait = OFF    ;Wait selections are unavailable for table reads and table writes
    CCP2MX = PORTC    ;ECCP2 input/output is multiplexed with RC1
    ECCPMX = PORTE    ;ECCP1/3 (P1B/P1C/P3B/P3C) are multiplexed onto RE6, RE5, RE4 and RE3 respectively
    LPT1OSC = OFF    ;Timer1 configured for higher power operation
    MCLRE = OFF    ;RG5 input pin enabled; MCLR disabled
    STVREN = OFF    ;Stack full/underflow will not cause Reset
    LVP = Off    ;Single-Supply ICSP enabled
    BBSIZ = BB2K    ;1K word (2 Kbytes) Boot Block size
    XINST = OFF    ;Instruction set extension and Indexed Addressing mode enabled
    Debug = OFF    ;Background debugger disabled, RB6 and RB7 configured as general purpose I/O pins
    CP0 = OFF    ;Block 0 (000800, 001000 or 002000-003FFFh) not code-protected
    CP1 = OFF    ;Block 1 (004000-007FFFh) not code-protected
    CP2 = OFF    ;Block 2 (008000-00BFFFh) not code-protected
    CP3 = OFF    ;Block 3 (00C000-00FFFFh) not code-protected
    CP4 = OFF    ;Block 4 (010000-013FFFh) not code-protected
    CP5 = OFF    ;Block 5 (014000-017FFFh) not code-protected
    CP6 = OFF    ;Block 6 (01BFFF-018000h) not code-protected
    CP7 = OFF    ;Block 7 (01C000-01FFFFh) not code-protected
    CPB = OFF    ;Boot Block (000000-0007FFh) not code-protected
    CPD = OFF    ;Data EEPROM not code-protected
    WRT0 = OFF    ;Block 0 (000800, 001000 or 002000-003FFFh) not write-protected
    WRT1 = OFF    ;Block 1 (004000-007FFFh) not write-protected
    WRT2 = OFF    ;Block 2 (008000-00BFFFh) not write-protected
    WRT3 = OFF    ;Block 3 (00C000-00FFFFh) not write-protected
    WRT4 = OFF    ;Block 4 (010000-013FFFh) not write-protected
    WRT5 = OFF    ;Block 5 (014000-017FFFh) not write-protected
    WRT6 = OFF    ;Block 6 (01BFFF-018000h) not write-protected
    WRT7 = OFF    ;Block 7 (01C000-01FFFFh) not write-protected
    WRTC = OFF    ;Configuration registers (300000-3000FFh) not write-protected
    WRTB = OFF    ;Boot Block (000000-007FFF, 000FFF or 001FFFh) not write-protected
    WRTD = OFF    ;Data EEPROM not write-protected
    EBTR0 = OFF    ;Block 0 (000800, 001000 or 002000-003FFFh) not protected from table reads executed in other blocks
    EBTR1 = OFF    ;Block 1 (004000-007FFFh) not protected from table reads executed in other blocks
    EBTR2 = OFF    ;Block 2 (008000-00BFFFh) not protected from table reads executed in other blocks
    EBTR3 = OFF    ;Block 3 (00C000-00FFFFh) not protected from table reads executed in other blocks
    EBTR4 = OFF    ;Block 4 (010000-013FFFh) not protected from table reads executed in other blocks
    EBTR5 = OFF    ;Block 5 (014000-017FFFh) not protected from table reads executed in other blocks
    EBTR6 = OFF    ;Block 6 (018000-01BFFFh) not protected from table reads executed in other blocks
    EBTR7 = OFF    ;Block 7 (01C000-01FFFFh) not protected from table reads executed in other blocks
    EBTRB = OFF    ;Boot Block (000000-007FFF, 000FFF or 001FFFh) not protected from table reads executed in other blocks
CONFIG_END            
            
            PLL_REQ = On                      'PLL Devider by 4 so we run at 40MHz                    
            
            INTCON2.7 = 1                     'Disable Pullup Resistors on Port B
            ALL_DIGITAL = On                  'Set All pins to Digital       
            
            'Setup Hardware Serial 1 
            HSERIAL_BAUD = 38400              'Set baud rate to 38400
            HSERIAL_RCSTA = %10010000         'Enable serial port and continuous receive
            HSERIAL_TXSTA = $24               'Enable transmit and asynchronous mode 
            HSERIAL_CLEAR = On                  'Enable Error clearing on received characters
            
            'Setup Hardware Serial 2
            HSERIAL2_BAUD = 38400              'Set baud rate to 38400
            HSERIAL2_RCSTA = %10010000        'Enable serial port and continuous receive
            HSERIAL2_TXSTA = $24              'Enable transmit and asynchronous mode 
            HSERIAL2_CLEAR = On                  'Enable Error clearing on received characters
            
            'General Switches
            ADCON0.0 = 0                       'Disable A/D converter
            MEMCON.7 = 1                       'Disable External Memory Bus controller on PORT D
            CMCON.0 = 1                        'Comparators OFF
            CMCON.1 = 1
            CMCON.2 = 1

For some reason the declares:

HSERIAL2_BAUD = 38400  
HSERIAL2_CLEAR = On

are not being highlighted as the rest of the declares but it compiles fine.

I have managed to go around the serial send/receive problem by doing the following for the receive:

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            RCSTA2 = %10010000        'Enable serial port and continuous receive
            TXSTA2 = $24              'Enable transmit and asynchronous mode               
            RCSTA2.7 = 1    'Enable Serial port
            RCSTA2.4 = 0    'Continuous Receive Disabled
            RCSTA2.4 = 1    'Continuous Receive Enabled
            HSerIn2 [Wait("D"),SW_Main_Val[9],SW_Main_Val[10],SW_Main_Val[11]]
            RCSTA2.7 = 0    'Disable Serial port

And for the transmit:

'Our Serial Configs
                    RCSTA2 = %10010000        'Enable serial port and continuous receive
                    TXSTA2 = $24              'Enable transmit and asynchronous mode
                    HSerOut2 ["C","M",UI_Cur_Selection,UI_EEAddress.LowByte,UI_EEAddress.HighByte,1,3,"sss00"] 'Send the command

The problem is that this is unstable and sometimes works and other times i have to reset the IC a couple of times to make it work.

My question is: Is there some bug in the compiler and i get this problem? Also why doesn't the command just work on it's own as the First serial port does and i have to manually reset the port each time?

It doesn't matter if i use HSerout or Hrsout, the problem is the same.

I am using the compiler version: 3.5.2.7

Any help about this would be appreciated.

[fgcity]

Any info? I could really use the help on this.

[fgcity]

Can Someone Help me with this?

[SmallFry]

I have used two serial ports on an 18F46K22 and they worked fine but I seem to remember that I needed to tris the ports, ie rx input, tx output for it to work.

[fgcity]

My problem is not that the serial doesn't work. It works but it sends and receives data as if it is shifted every single cycle. The PIC i have is 18F8722

[J. Mark Wolf]

I've used this chip and it's HSER ports without problem in the past. Have you tried paring your program down to barest essentials on one port at a time, and a slower baud rate, to see if you can get it working reliably. Then add the other port, increase the baud rate etc.?

[fgcity]

I have tried everything.

Perhaps it would be helpful if you could post your fuses as well as Serial configurations for the Second port from your Past code which worked?

[J. Mark Wolf]

Below is what worked for me:

Sorry, the "wrap code tags" doesn't work for me anymore. It wouldn't let me select the entirety of the pasted text, and it screws up the formatting.
'
Device 18F8722' Produce code for a 18F452 PIC micro device
Xtal 20 ' PRIOR TO PLL
'
Config_Start
OSC = HSPLL ' HS Oscillator
FCMEN = OFF ' Failsafe Clock Monitor Disabled
IESO = OFF ' Int/Ext Oscillator Switch Over Disabled
PWRT = On ' Power Up Timer Enabled
BOREN = OFF ' Brownout Reset Disabled
BORV = 0 ' Brownout Reset Voltage 4.6V
WDT = OFF ' Watchdog Timer Disabled
WDTPS = 1 ' Watchdog Postscaler: 1:1
MCLRE = On ' MCLR Enabled
LPT1OSC = OFF ' T1 Oscillator Disabled
CCP2MX = PORTC' CCP2 Mux Muxed with RC1
STVREN = On ' Stack Overflow Reset Enabled
LVP = OFF ' Low Voltage ICSP Disabled
XINST = OFF ' XINST Disabled
Debug = OFF ' Background Debugger Disabled
CP0 = OFF ' Code Protection Block 0 Disabled
CP1 = OFF ' Code Protection Block 1 Disabled
CP2 = OFF ' Code Protection Block 2 Disabled
CP3 = OFF ' Code Protection Block 3 Disabled
CPB = OFF ' Boot Block Code Protection Disabled
CPD = OFF ' Data EEPROM Code Protection Disabled
WRT0 = OFF ' Write Protection Block 0 Disabled
WRT1 = OFF ' Write Protection Block 1Disabled
WRT2 = OFF ' Write Protection Block 2 Disabled
WRT3 = OFF ' Write Protection Block 3 Disabled
WRTB = OFF ' Boot Block Write Protection Disabled
WRTC = OFF ' Configuration Register Write Protection Disabled
WRTD = OFF ' Data EEPROM Write Protection Disabled
EBTR0 = OFF ' Table Read Protection Block 0 Disabled
EBTR1 = OFF ' Table Read Protection Block 1 Disabled
EBTR2 = OFF ' Table Read Protection Block 2 Disabled
EBTR3 = OFF ' Table Read Protection Block 3 Disabled
EBTRB = OFF ' Boot Block Table Read Protection Disabled
Config_End
'
Declare Warnings On' Enable complier warning message
Declare Reminders On' Enable complier reminder messages
'
'************************************************* *****************************
'
TRISA = %00111111 'set A/D pins as inputs
TRISB = %00111011 '
TRISC = %10010000 '
TRISD = %00100000 '
TRISE = %00000000 '
TRISF = %11111111 '
TRISG = %00000100 '
TRISH = %00010000 '
TRISJ = %00001111 '
'
INTCON = %00000000 'config INTERRUPTS
T1CON = %11111100 'config timer1
Symbol TMR1ON = T1CON.0
'
'************************************************* *****************************
'
' S1 S2 S3 S4 bit time
'1200 baud on on X X 800uS
'2400 baud off on X X 400uS
'9600 baud on off X X 100uS
'19.2k baud off off X X 50uS
'
'************************************************* *****************************
'
Declare serial_data 8 ' USED FOR SERIN/SEROUT
'
Declare Hserial_Baud 4800'
Declare Hserial_TXSTA $20 '$20 or $24
Declare Hserial_RCSTA $90 '
'
Declare HSERIAL2_BAUD 4800'
Declare Hserial2_TXSTA $20 '$20 or $24
Declare Hserial2_RCSTA $90 '
'
Symbol N81_2400_True = 396 ' no parity, 8-bits, 1-stop, non-inv
Symbol N81_2400_Inv = 16780 ' no parity, 8-bits, 1-stop, non-inv
Symbol N81_4800_True = 188 ' no parity, 8-bits, 1-stop, non-inv
Symbol N81_4800_Inv = 16572 ' no parity, 8-bits, 1-Stop, inv
Symbol N81_9600_True = 84 ' no parity, 8-bits, 1-stop, non-inv
Symbol N81_9600_Inv = 16468 ' no parity, 8-bits, 1-Stop, inv
Symbol N81_19200_True = 32 ' no parity, 8-bits, 1-stop, non-inv

[fgcity]

Tnx for the info i will try it out. Just one question. You have XTAL 20 and PLL enabled.

So that gives you 80MHz? I have a 10MHz crystal and PLL enabled.

[J. Mark Wolf]

No, there is actually a 10Mhz crystal on this particular module:

(http://www.etteam.com/product/pic/ET...8F8722-Eng.pdf).

I just defined the XTAL as "20" for purposes of the Mecanique bootloader, where the options are only "20" or "4". Then, as I recall, I had to delare the baud rates as "half-speed' (declaring 4800 baud would actually give 9600, etc).