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16F18325 - UART and I2C pins

 
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jaikumar



Joined: 15 Dec 2006
Posts: 109

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16F18325 - UART and I2C pins
PostPosted: Fri Apr 13, 2018 1:11 am     Reply with quote
Hi all,

I have a existing 16F1825 project board. and would like to change to chip 16F18325.
I have the uart connected to PIN_C4(Tx) and PIN_C5(Rx) and I2C connected pins PIN_C0(SCL) and PIN_C1(SDA).

Below is the code i am trying. The I2C works but uart does not. If anybody can help, thanks. I want to use hardware uart and i2c.

Code:

#include <16F18325.h>
#device ADC=8


#FUSES MCLR
#FUSES PUT
#FUSES NOFCMEN
#FUSES NOCKS
#FUSES BROWNOUT
#FUSES BORV27 
#FUSES NOPROTECT
#FUSES NOCPD
#FUSES NOLVP
#FUSES RSTOSC_HFINTRC
#FUSES NOWDT


#define RTC_SDA PIN_C1 
#define RTC_SCL PIN_C0

#define RS232_RX PIN_C5
#define RS232_TX PIN_C4

#pin_select U1RX=RS232_RX
#pin_select U1TX=RS232_TX

#pin_select SCL2OUT=RTC_SCL
#pin_select SCL2IN=RTC_SCL

#pin_select SDA2OUT=RTC_SDA
#pin_select SDA2IN=RTC_SDA

#use rs232(STREAM=r232,baud=9600, xmit=RS232_TX,rcv=RS232_RX)
#use i2c(master,Fast,sda=RTC_SDA, scl=RTC_SCL, FORCE_HW)

void main()
{

  while(1)
  {   
    printf("Hello');
    delay_ms(3000);
  }
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Fri Apr 13, 2018 3:26 am     Reply with quote
What is your CCS compiler version ?
jaikumar



Joined: 15 Dec 2006
Posts: 109

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PostPosted: Fri Apr 13, 2018 3:38 am     Reply with quote
Compiler version: 5.078
jaikumar



Joined: 15 Dec 2006
Posts: 109

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PostPosted: Fri Apr 13, 2018 4:02 am     Reply with quote
Thanks PCM programmer.

This post below from Ttelmah helped to make it work.
https://www.ccsinfo.com/forum/viewtopic.php?t=55295&highlight=16f18325
for others who would like to run both uart and i2c see below:
Code:

#fuses MCLR, NOCLKOUT, PUT, BROWNOUT
#fuses LPBOR, BORV27, NOLVP
#fuses NOEXTOSC, RSTOSC_HFINTRC, NOWDT
#fuses NOPPS1WAY


#define RTC_SDA PIN_C1 
#define RTC_SCL PIN_C0

#define RS232_RX PIN_C5
#define RS232_TX PIN_C4

 
#use delay(internal=8M)

#pin_select U1RX=RS232_RX
#pin_select U1TX=RS232_TX

#pin_select SCL1OUT=RTC_SCL 
#pin_select SCL1IN=RTC_SCL

#pin_select SDA1OUT=RTC_SDA 
#pin_select SDA1IN=RTC_SDA
 
#use rs232(UART1,baud=9600, bits=8, stop=1, parity=N )
#use i2c(Master, fast, sda=RTC_SDA, scl=RTC_SCL, force_hw)


Regards,
Jai.
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