![](templates/subSilver/images/CCSLogo.jpg) |
![CCS C Software and Maintenance Offers](templates/subSilver/images/forumAd6.jpg) |
View previous topic :: View next topic |
Author |
Message |
mehmetem
Joined: 29 Jul 2011 Posts: 12
|
pic16f877a i2c slave problem |
Posted: Fri Jul 29, 2011 8:25 am |
|
|
Hi All,
I have a problem; I could not simulate ex_slave example.
My master code:
Code: |
#include <16F877A.h>
#device adc=8
#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOPUT //No Power Up Timer
#FUSES PROTECT //Code protected from reads
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected
#use delay(clock=20000000)
#use i2c(Master,Slow,sda=PIN_C4,scl=PIN_C3,force_hw)#include <2402.C>
byte gelen=0;
void main()
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
init_ext_eeprom();
// TODO: USER CODE!!
gelen= read_ext_eeprom(0x03);
while(1);
}
|
My slave code is
Code: |
#if defined(__PCM__)
#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)
#elif defined(__PCH__)
#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)
#endif
#use i2c(SLAVE, SDA=PIN_C4, SCL=PIN_C3, address=0xa0)
BYTE address, buffer[0x10];
#INT_SSP
void ssp_interupt ()
{
BYTE incoming, state;
state = i2c_isr_state();
if(state <= 0x80) //Master is sending data
{
incoming = i2c_read();
if(state == 1) //First received byte is address
address = incoming;
if(state == 2) //Second received byte is data
buffer[address] = incoming;
}
if(state == 0x80) //Master is requesting data
{
i2c_write(buffer[address]);
}
}
void main ()
{
int i=0;
enable_interrupts(GLOBAL);
enable_interrupts(INT_SSP);
for (i=0;i<16;i++)
{buffer[i]=0x37;}
while (TRUE) {}
}
|
and my problem: Received data all times 80. Where is my mistake? I could not find. Here is a Proteus picture:
I am sorry for my broken English. _________________ trainee |
|
![](templates/subSilver/images/spacer.gif) |
temtronic
Joined: 01 Jul 2010 Posts: 9176 Location: Greensville,Ontario
|
|
Posted: Fri Jul 29, 2011 8:51 am |
|
|
Probably a Proteus problem as it is full of bugs, errors, glitches etc.
You should use real hardware.
If you can't contact a Proteus help forum or the mfr of the simulator.
There are working code examples in the CCS examples folder you might consult, see if they work under Proteus. |
|
![](templates/subSilver/images/spacer.gif) |
mehmetem
Joined: 29 Jul 2011 Posts: 12
|
Thank you, I solved problem. |
Posted: Wed Aug 03, 2011 12:57 am |
|
|
![Smile](images/smiles/icon_smile.gif) _________________ trainee |
|
![](templates/subSilver/images/spacer.gif) |
PEDE
Joined: 10 Sep 2011 Posts: 1
|
pic16f877a i2c slave problem |
Posted: Sat Sep 10, 2011 10:29 am |
|
|
How did you fix your problem? Thx... |
|
![](templates/subSilver/images/spacer.gif) |
mehmetem
Joined: 29 Jul 2011 Posts: 12
|
There is not anything, Don't forget pull-up' MY WORKING CODE |
Posted: Sat Sep 10, 2011 2:12 pm |
|
|
Code: |
BYTE address, BufferTxt[20], buffer[20];
#INT_SSP
void ssp_interupt ()
{
BYTE incoming, state;
state = i2c_isr_state();
if(state <= 0x80) //Master is sending data
{
incoming = i2c_read();
if(state == 1) //First received byte is address
address = incoming;
if(state == 2) //Second received byte is data
buffer[address] = incoming;
}
if(state == 0x80) //Master is requesting data
{
i2c_write(buffer[address]);
}
} |
AND MASTER
Code: | while(1)
{
init_ext_eeprom();
PresetNumber= read_ext_eeprom(0x09);
if (PresetNumber!=PresetNumberOld)
{
CalcPhase();
yerptr=&(Rpm);
countL=*(yerPtr);
write_ext_eeprom(0x07,CountL);
countH=*(yerPtr+1);
write_ext_eeprom(0x08,CountH);
delay_ms(40);
} |
_________________ trainee |
|
![](templates/subSilver/images/spacer.gif) |
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|