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mtsoule
Joined: 19 Oct 2011
Posts: 31
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| Need HW 232, generating SW 232 |
 Posted: Wed Oct 19, 2011 9:54 am |
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My interrupts and alternate pin function are not working, i believe it is because the code is generating a software 232 instead of a hardware 232, what am i missing?
I know the interrupts will not work on a software generated 232, as well as the alternate pin location of the built in EUSART.
Somebody set me straight.
| Code: |
//CCS PCM C Compiler, Version 4.109, 53204 19-Oct-11 11:22
#include <16LF1827.h>
#FUSES NOWDT //No Watch Dog Timer
#FUSES INTRC_IO //Internal RC Osc, no CLKOUT
#FUSES PUT //Power Up Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES MCLR //Master Clear pin enable
#FUSES NOCPD //No EE protection
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOIESO //Internal External Switch Over mode disabled
#FUSES NOFCMEN //Fail-safe clock monitor disabled
#FUSES WDT_NOSL
#FUSES NOCLKOUT
#FUSES NOWRT //Program memory not write protected
#FUSES NOVCAP
#FUSES PLL
#FUSES STVREN //Stack full/underflow will cause reset
#FUSES BORV19
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#use delay(internal=2MHz)
#use rs232(UART1, baud=9600, PARITY=N, BITS=8, STOP=1)
#int_RDA
void RDA_isr(void)
{
char c;
c = getc();
putc(c); // Echo back all incoming characters
}
void main()
{
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);
setup_oscillator(OSC_2MHZ|OSC_NORMAL|OSC_PLL_OFF,0);
//Transmit M
while(true){
fputc('M');
delay_ms(1000);
}
}
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Last edited by mtsoule on Wed Oct 19, 2011 11:18 am; edited 2 times in total |
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Wed Oct 19, 2011 10:54 am |
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1) Always post your compiler version!
2) | Code: | | setup_spi2(SPI_SS_DISABLED); |
This is an old bug in the CCS Code Wizard, probably not related to your problem but an incorrect configuration anyway. Should be changed to:
3) What speed do you want the PIC to run? You have the PLL fuse set, a #delay of 4MHz and a setup_oscillator for 2MHz without PLL. Keep things simple and consistent and there is a larger chance of things working as expected.
Verify your actual clock speed by having a LED blink at 1 second interval and meassure with a stopwatch by counting the flashes for a period of at least 10 seconds.
4) | Code: | // Put the UART on pins A4, A5 for Tx, Rx.
void select_alt_pins0(void)
{
#byte APFCON0 = getenv("SFR:APFCON0")
APFCON0 |= 0x84; // Select alternate pins for Tx, Rx
} |
This makes no sense to me. According to the datasheet the Tx pin can be changed from from RB1 to RB2 using APFCON0.7 and Rx from RB2 to RB5 using APFCON1.0 You want to change the wrong pins and the 0x04 in 0x84 is not required.
5) Keep example programs as short as possible for the best responses. Your program is way too big for me to start wasting my time by examining the assembly file. Remove all unnecessary initialization code and all interrupt related stuff. Post a program of maximum 10 lines, 20 including fuses. |
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mtsoule
Joined: 19 Oct 2011
Posts: 31
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| Posted: Wed Oct 19, 2011 11:14 am |
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My compiler version is at the top of the list file
| Code: |
CCS PCM C Compiler, Version 4.109 19-Oct-11 11:22
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Thanks for pointing out the bug for SPI2, i will make the change.
I want to run at 2MHz, I noticed PLL Fuse, after the post, I do have everything set to 2MHz.
Still do not understand why it generates software 232, when I would expect it to use the hardware UART. I believe I have everything in place for that.
Also, ignore the pin change in the comments, i am NOT using A4 and A5 for Tx an Rx
I apologize for the long code, i will repost shorter code.
| Code: |
#include <16LF1827.h>
#FUSES NOWDT //No Watch Dog Timer
#FUSES INTRC_IO //Internal RC Osc, no CLKOUT
#FUSES PUT //Power Up Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES MCLR //Master Clear pin enable
#FUSES NOCPD //No EE protection
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOIESO //Internal External Switch Over mode disabled
#FUSES NOFCMEN //Fail-safe clock monitor disabled
#FUSES WDT_NOSL
#FUSES NOCLKOUT
#FUSES NOWRT //Program memory not write protected
#FUSES NOVCAP
#FUSES PLL
#FUSES STVREN //Stack full/underflow will cause reset
#FUSES BORV19
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#use delay(internal=2MHz)
#use rs232(UART1, baud=9600, PARITY=N, BITS=8, STOP=1)
#int_RDA
void RDA_isr(void)
{
char c;
c = getc();
putc(c); // Echo back all incoming characters
}
void main()
{
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);
setup_oscillator(OSC_2MHZ|OSC_NORMAL|OSC_PLL_OFF,0);
//Transmit M
while(true){
fputc('M');
delay_ms(1000);
}
}
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Wed Oct 19, 2011 11:50 am |
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My mistake for overlooking the compiler version number.
If you don't want to use PLL it is best to remove this line. Probably the setup_oscillator function overrules the fuse, but why take chances?
I don't have v4.109. Can you post the assembly listing? |
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mtsoule
Joined: 19 Oct 2011
Posts: 31
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| Posted: Wed Oct 19, 2011 11:54 am |
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Assembly listing:
| Code: |
CCS PCM C Compiler, Version 4.109 19-Oct-11 13:52
Filename: D:\Designs\CVM_3\CCS\main.lst
ROM used: 172 words (4%)
Largest free fragment is 2048
RAM used: 10 (3%) at main() level
24 (6%) worst case
Stack: 3 worst case (1 in main + 2 for interrupts)
*
0000: MOVLP 00
0001: GOTO 081
0002: NOP
*
0004: CLRF 03
0005: CLRF 0A
0006: MOVLB 00
0007: MOVF 77,W
0008: MOVWF 20
0009: MOVF 78,W
000A: MOVWF 21
000B: MOVF 79,W
000C: MOVWF 22
000D: MOVF 7A,W
000E: MOVWF 23
000F: CLRF 05
0010: MOVLW 91
0011: MOVWF 04
0012: BTFSS 00.5
0013: GOTO 016
0014: BTFSC 11.5
0015: GOTO 01F
0016: MOVF 20,W
0017: MOVWF 77
0018: MOVF 21,W
0019: MOVWF 78
001A: MOVF 22,W
001B: MOVWF 79
001C: MOVF 23,W
001D: MOVWF 7A
001E: RETFIE
001F: MOVLP 00
0020: GOTO 046
....................
.................... #include <16LF1827.h>
.................... //////// Standard Header file for the PIC16LF1827 device ////////////////
.................... #device PIC16LF1827
.................... #list
....................
....................
.................... #FUSES NOWDT //No Watch Dog Timer
.................... #FUSES INTRC_IO //Internal RC Osc, no CLKOUT
.................... #FUSES PUT //Power Up Timer
.................... #FUSES NOPROTECT //Code not protected from reading
.................... #FUSES MCLR //Master Clear pin enable
.................... #FUSES NOCPD //No EE protection
.................... #FUSES NOBROWNOUT //No brownout reset
.................... #FUSES NOIESO //Internal External Switch Over mode disabled
.................... #FUSES NOFCMEN //Fail-safe clock monitor disabled
.................... #FUSES WDT_NOSL
.................... #FUSES NOCLKOUT
.................... #FUSES NOWRT //Program memory not write protected
.................... #FUSES NOVCAP
.................... #FUSES PLL
.................... #FUSES STVREN //Stack full/underflow will cause reset
.................... #FUSES BORV19
.................... #FUSES NODEBUG //No Debug mode for ICD
.................... #FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
....................
.................... #use delay(internal=2MHz)
*
0071: MOVLW 20
0072: MOVWF 05
0073: MOVLW 06
0074: MOVWF 04
0075: MOVF 00,W
0076: BTFSC 03.2
0077: GOTO 07F
0078: MOVLW A5
0079: MOVWF 77
007A: DECFSZ 77,F
007B: GOTO 07A
007C: NOP
007D: DECFSZ 00,F
007E: GOTO 078
007F: MOVLP 00
0080: GOTO 0A9 (RETURN)
.................... #use rs232(UART1, baud=9600, PARITY=N, BITS=8, STOP=1)
*
0021: MOVLB 01
0022: BCF 0D.1
0023: MOVLB 02
0024: BCF 0D.1
0025: MOVLW 08
0026: MOVWF 78
0027: GOTO 028
0028: NOP
0029: BSF 78.7
002A: GOTO 03B
002B: BCF 78.7
002C: MOVLB 00
002D: RRF 28,F
002E: MOVLB 02
002F: BTFSC 03.0
0030: BSF 0D.1
0031: BTFSS 03.0
0032: BCF 0D.1
0033: BSF 78.6
0034: GOTO 03B
0035: BCF 78.6
0036: DECFSZ 78,F
0037: GOTO 02C
0038: GOTO 039
0039: NOP
003A: BSF 0D.1
003B: MOVLW 0A
003C: MOVWF 04
003D: DECFSZ 04,F
003E: GOTO 03D
003F: GOTO 040
0040: BTFSC 78.7
0041: GOTO 02B
0042: BTFSC 78.6
0043: GOTO 035
0044: MOVLB 00
0045: RETURN
0046: MOVLB 01
0047: BSF 0D.1
0048: MOVLB 00
0049: BTFSC 0D.1
004A: GOTO 049
004B: MOVLW 08
004C: MOVWF 77
004D: CLRF 28
004E: BSF 77.7
004F: GOTO 05E
0050: BCF 77.7
0051: GOTO 05E
0052: BCF 03.0
0053: BTFSC 0D.1
0054: BSF 03.0
0055: RRF 28,F
0056: BSF 77.6
0057: GOTO 05E
0058: BCF 77.6
0059: DECFSZ 77,F
005A: GOTO 052
005B: MOVF 28,W
005C: MOVWF 78
005D: GOTO 069
005E: MOVLW 0B
005F: BTFSC 77.7
0060: MOVLW 03
0061: MOVWF 78
0062: DECFSZ 78,F
0063: GOTO 062
0064: BTFSC 77.7
0065: GOTO 050
0066: BTFSC 77.6
0067: GOTO 058
0068: GOTO 052
....................
.................... #int_RDA
.................... void RDA_isr(void)
.................... {
.................... char c;
.................... c = getc();
0069: MOVF 78,W
006A: MOVWF 27
.................... putc(c); // Echo back all incoming characters
006B: MOVF 27,W
006C: MOVWF 28
006D: CALL 021
.................... }
....................
006E: BCF 11.5
006F: MOVLP 00
0070: GOTO 016
.................... void main()
.................... {
*
0081: CLRF 05
0082: CLRF 04
0083: MOVLW 1F
0084: ANDWF 03,F
0085: MOVLW 64
0086: MOVLB 01
0087: MOVWF 19
0088: BCF 0D.1
0089: MOVLB 02
008A: BSF 0D.1
008B: MOVLB 03
008C: CLRF 0C
008D: CLRF 0D
008E: MOVLB 02
008F: CLRF 11
0090: CLRF 12
0091: CLRF 13
0092: CLRF 14
.................... enable_interrupts(INT_RDA);
0093: MOVLB 01
0094: BSF 11.5
.................... enable_interrupts(GLOBAL);
0095: MOVLW C0
0096: IORWF 0B,F
.................... setup_oscillator(OSC_2MHZ|OSC_NORMAL|OSC_PLL_OFF,0);
0097: MOVLW 60
0098: MOVWF 19
0099: CLRF 18
009A: MOVLB 00
009B: CLRF 24
009C: BTFSC 0B.7
009D: BSF 24.7
009E: BCF 0B.7
....................
.................... //Transmit M
.................... while(true){
.................... fputc('M');
009F: MOVLW 4D
00A0: MOVWF 28
00A1: CALL 021
00A2: BTFSC 24.7
00A3: BSF 0B.7
.................... delay_ms(1000);
00A4: MOVLW 04
00A5: MOVWF 25
00A6: MOVLW FA
00A7: MOVWF 26
00A8: GOTO 071
00A9: DECFSZ 25,F
00AA: GOTO 0A6
.................... }
00AB: GOTO 09B
....................
.................... }
....................
....................
00AC: SLEEP
Configuration Fuses:
Word 1: 09D4 PUT NOPROTECT MCLR NOCPD NOBROWNOUT NOIESO NOFCMEN WDT_NOSL INTRC_IO NOCLKOUT
Word 2: 1613 NOWRT NOVCAP PLL_SW STVREN BORV19 NODEBUG NOLVP |
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Wed Oct 19, 2011 1:21 pm |
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Looks like a bug in the CCS Device Database. The interrupt handler is generated but is using bit-banging for sending and receiving the data. A combination normally not possible.
The PIC16F1827 was very new in compiler v4.109 but current version is v4.125. Very likely the bug has been fixed but someone else with a newer version has to confirm this. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Oct 19, 2011 2:12 pm |
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Compiler vs. 4.125 does use the hardware UART for the 16FL1827:
See the comments below which show it's using the correct registers:
| Code: |
..... #use rs232(UART1, baud=9600, PARITY=N, BITS=8, STOP=1)
*
0021: BTFSS 11.4 // PIR1.TXIF
0022: GOTO 021
0023: MOVLB 03
0024: MOVWF 1A // TXREG
0025: MOVLB 00
0026: RETURN
................... #int_RDA
.................... void RDA_isr(void)
.................... {
.................... char c;
.................... c = getc();
0027: BTFSS 11.5 // PIR1.RCIF
0028: GOTO 027
0029: MOVLB 03
002A: MOVF 19,W // RCREG
002B: MOVLB 00
002C: MOVWF 27
.................... putc(c);
002D: MOVF 27,W
002E: CALL 021
.................... }
.................... }
....................
002F: BCF 11.5 // PIR1.RCIF
0030: MOVLP 00
0031: GOTO 016
.................... void main()
.................... {
*
0042: CLRF 05
0043: CLRF 04
0044: MOVLW 1F
0045: ANDWF 03,F
0046: MOVLW 62
0047: MOVLB 01
0048: MOVWF 19 // OSCCON
0049: MOVLW 0C
004A: MOVLB 03
004B: MOVWF 1B // SPBRGL
004C: MOVLW A6
004D: MOVWF 1E // TXSTA
004E: MOVLW 90
004F: MOVWF 1D // RCSTA
0050: CLRF 0C
0051: CLRF 0D
0052: MOVLB 02
0053: CLRF 12
0054: CLRF 11
0055: CLRF 14
0056: CLRF 13
.................... enable_interrupts(INT_RDA);
0057: MOVLB 01
0058: BSF 11.5 // PIR1.RCIF
.................... enable_interrupts(GLOBAL);
0059: MOVLW C0
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mtsoule
Joined: 19 Oct 2011
Posts: 31
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| Posted: Wed Oct 19, 2011 2:29 pm |
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| Thank you ckielstra and PCM programmer, i have purchased the maintenance update, i will post my results upon arrivial. |
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mtsoule
Joined: 19 Oct 2011
Posts: 31
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| Posted: Wed Oct 19, 2011 2:44 pm |
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| I have received the update, and just as you said, it did fix the problem. Lesson learned STAY UP-TO-DATE!! |
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