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Gabriel
Joined: 03 Aug 2009
Posts: 1067
Location: Panama
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| RDA1 not firing - 2 UARTS (Solved) |
 Posted: Wed Apr 15, 2015 8:58 pm |
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Sigh, the learning continues.
Recently got a new dev board and GSM modem:
http://www.mikroe.com/pic/clicker/
Litterally the board and GSM module as shown on the site.
...And it uses a PIC ive never used before... 18F47J53 which took me about 6 hours to get the right Oscillator settings, prior to my post yesterday.
Now, im trying to run my trusty GSM code and have noticed 2 things:
1)
My "Autobaud" feature is not running and seems like | Code: | | set_uart_speed(9600,U1); |
has no effect on the UART speed. ive looked at it on my Scope and tested with FTDI Boards.
2) The INT_RDA interrupt is not firing at all, even though the modem is responding, as viewed on my scope and piped to a terminal.
I DO have both UART1 and UART2 running simultaneously... one for the modem and the other for debugging. both TX correctly but the ISR is not firing.
Ive enabled GLOBAL and BOTH RDA interrupts.
The code works, as ive been testing it alot lately but now with the processor change things are breaking in the wierdest places.
My compiler version is listed on my signature, obviously the PCH.
My ISR CODE:
| Code: | #INT_RDA
void SerialInt1()
{
Main_Buffer[Main_Buffer_Index]=getchar(); // Gets chars from uart
Main_Buffer_Index++; // Increment counter
if(Main_Buffer_Index==MAIN_BUFFER_SIZE)
{
Main_Buffer_Index=MAIN_BUFFER_SIZE-4;
//Main_Buffer_Index=0; // Circle Buffer
Long_Message=TRUE;
}
output_high(PIN_A1);
}
#INT_RDA2
void SerialInt2()
{
} |
FUSES:
| Code: | #include <18F47J53.h>
#DEVICE PASS_STRINGS=IN_RAM
#fuses NOWDT,NODSWDT
#fuses NOXINST
#fuses NODEBUG
#fuses NOPROTECT
#fuses HSPLL,PLLEN,NOIESO,NOFCMEN
#fuses PLL4 //set usb pll clock to 4MHz (from 16Mhz input)
#fuses NOCPUDIV //set cpu clock to 48MHz
#use delay(clock=48MHz)
#pin_select U2TX=PIN_C2
#pin_select U2RX=PIN_C1
#use rs232(UART1,baud=9600, xmit=PIN_D6, rcv=PIN_D5, ERRORS,STREAM=U1)
#use rs232(UART2,baud=9600, xmit=PIN_C2, rcv=PIN_C1, ERRORS,STREAM=lcd_putc)
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Thanks
G
_________________
CCS PCM 5.078 & CCS PCH 5.093
Last edited by Gabriel on Thu Apr 16, 2015 6:43 am; edited 1 time in total |
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Gabriel
Joined: 03 Aug 2009
Posts: 1067
Location: Panama
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| Simple test |
| Posted: Wed Apr 15, 2015 9:51 pm |
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Ran a simple test like this:
RDA2 does fire but not RDA1
Ive been reading pretty much any thread that references RDA, with no usable suggetions.
| Code: | #include <18F47J53.h>
#fuses NOWDT,NODSWDT
#fuses NOXINST
#fuses NODEBUG
#fuses NOPROTECT
#fuses HSPLL,PLLEN,NOIESO,NOFCMEN
#fuses PLL4 //set usb pll clock to 4MHz (from 16Mhz input)
#fuses NOCPUDIV //set cpu clock to 48MHz
#use delay(clock=48MHz)
#pin_select U2TX=PIN_C2
#pin_select U2RX=PIN_C1
#use rs232(UART1,baud=9600, xmit=PIN_D6, rcv=PIN_D5, ERRORS,STREAM=U1)
#use rs232(UART2,baud=9600, xmit=PIN_C2, rcv=PIN_C1, ERRORS,STREAM=lcd_putc)
#INT_RDA
void RDA_ISR();
#INT_RDA2
void RDA_ISR2();
char a;
void main()
{
setup_comparator(NC_NC_NC_NC);
setup_vref(VREF_OFF);
setup_adc_ports(NO_ANALOGS);
enable_interrupts(INT_RDA); // remote Rx 232 port
enable_interrupts(INT_RDA2); // remote Rx 485 port
enable_interrupts(GLOBAL);
while(1)
{
fprintf(lcd_putc,"TU TIA ES PUTA U2\r\n");
fprintf(U1,"AT\r");
delay_ms(2000);
}
}
#INT_RDA
void RDA_ISR()
{
a=fgetc(U1);
output_high(PIN_A0);
}
#INT_RDA2
void RDA_ISR2()
{
a=fgetc(lcd_putc);
output_high(PIN_A1);
} |
_________________
CCS PCM 5.078 & CCS PCH 5.093 |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Apr 15, 2015 9:54 pm |
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You have UART1 placed on pins D6 and D5, but you can't relocate
the pins for hardware UART1 on this PIC. It's not allowed:
| Quote: |
#use rs232(UART1,baud=9600, xmit=PIN_D6, rcv=PIN_D5, ERRORS,STREAM=U1)
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If you use those pins, the compiler will create a software UART, so there
will be no RDA interrupt. If you look at the .LST file, and you see
"MOVLW 8" (for the 8 data bits) and you see no reference to RCREG or
TXREG, with only "bit-banging" operations on the port pins, then you know
you are looking at software UART code:
| Code: | ...... #use rs232(UART1,baud=9600, xmit=PIN_D6, rcv=PIN_D5, ERRORS,STREAM=U1)
000CA: BSF TRISD.5
000CC: BTFSC PORTD.5
000CE: BRA 00CC
000D0: MOVLW 08 |
The 18F47J53 data sheet says the hardware UART1 can only be on pins
C6 and C7. Only UART2 is relocatable:
| Quote: |
The pins of EUSART1 and EUSART2 are multiplexed
with the functions of PORTC (RC6/CCP9/TX1/CK1/RP17
and RC7/CCP10/RX1/DT1/SDO1/RP18) and remapped
(RPn1/TX2/CK2 and RPn2/RX2/DT2), respectively. |
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Gabriel
Joined: 03 Aug 2009
Posts: 1067
Location: Panama
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| Posted: Thu Apr 16, 2015 6:41 am |
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thanks PCM!
I was convinced i had the uart1 pins right and i was assuming a different board design on the uart pin allocation.
I have to say i am pretty disappointed in the board designers choice because as per your observations, both hardware uarts end up in the board's Bus connector. Uart 2 with its remappable pins, is pretty much locked to the connectors pin arrangement. It made sense to me to have the fixed uart, have the fixed connector pins...
Anyways, thanks for your help, you saved me a couple of hours.
G.
_________________
CCS PCM 5.078 & CCS PCH 5.093 |
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