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devilfrmheaven
Joined: 09 Feb 2016
Posts: 53
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| PIC16F726 Cap sense and Modbus [SOLVED] |
 Posted: Sun Nov 13, 2016 9:54 am |
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Hi All,
I'm trying to see if Capacitive touch will work along with Modbus and interestingly the capsense stops working as soon as I include Modbus.c.
Any ideas would be appreciated.
I have been not active in this forum for a long time now. Thanks to Pokemon Go. I wasted almost 4 months now.
| Code: |
#include <main.h>
#define MODBUS_TYPE MODBUS_TYPE_SLAVE
#define MODBUS_SERIAL_TYPE MODBUS_RTU //use MODBUS_ASCII for ASCII mode
#define MODBUS_SERIAL_RX_BUFFER_SIZE 64
#define MODBUS_SERIAL_BAUD 9600
#define MODBUS_SERIAL_INT_SOURCE MODBUS_INT_EXT //Source of interrupts (MODBUS_INT_EXT,MODBUS_INT_RDA,MODBUS_INT_RDA2)
#define MODBUS_SERIAL_RX_PIN PIN_c6 //Valid pin for serial receive
#define MODBUS_SERIAL_TX_PIN PIN_c7 //Valid pin for serial transmit
#define MODBUS_SERIAL_ENABLE_PIN PIN_c5 //Valid pin for serial enable, rs485 only
#define MODBUS_SERIAL_RX_ENABLE PIN_c5 //Valid pin for serial rcv enable, rs485 only
#define MODBUS_SERIAL_INT_SOURCE MODBUS_INT_RDA //Tipo de interrupção(assincrono) pro rs
//#include "modbus.c"
//#define MODBUS_ADDRESS 0x03
char msg;
void initialize()
{
output_low(PIN_A0);
output_low(PIN_A1);
output_low(PIN_A2);
output_low(PIN_A3);
output_low(PIN_A6);
output_low(PIN_A7);
}
/*
int8 swap_bits(int8 c)
{
return ((c&1)?128:0)|((c&2)?64:0)|((c&4)?32:0)|((c&8)?16:0)|((c&16)?8:0)
|((c&32)?4:0)|((c&64)?2:0)|((c&128)?1:0);
}
*/
void beep(){
output_high(PIN_B6);
delay_ms(20);
output_low(PIN_B6);
}
/*
int8 readvalue() {
int8 valu = 0;
if(input_state(PIN_A0)) valu = valu + 1;
if(input_state(PIN_A1)) valu = valu + 2;
if(input_state(PIN_A2)) valu = valu + 4;
if(input_state(PIN_A3)) valu = valu + 8;
if(input_state(PIN_A6)) valu = valu + 16;
if(input_state(PIN_A7)) valu = valu + 32;
return valu;
}
*/
void main() {
int8 coils = 0b00000101;
int8 inputs = 0b00001001;
int16 hold_regs[] = {0x8800,0x7700,0x6600,0x5500,0x4400,0x3300,0x2200,0x1100};
int16 input_regs[] = {0x1100,0x2200,0x3300,0x4400,0x5500,0x6600,0x7700,0x8800};
int16 event_count = 0;
setup_adc_ports(NO_ANALOGS);
enable_interrupts(GLOBAL);
initialize();
// modbus_init();
int8 i;
for(i=0; i<8; i++) { hold_regs[i] = 0;} // initializing all zeros.
while(TRUE){
//TODO: User Code
// hold_regs[0] = readvalue();
if(touchpad_hit())
{
msg=touchpad_getc();
switch(msg)
{
case 'A': beep(); output_toggle(PIN_A0); break;
case 'B': beep(); output_toggle(PIN_A1); break;
case 'C': beep(); output_toggle(PIN_A2); break;
case 'D': beep(); output_toggle(PIN_A3); break;
case 'E': beep(); output_toggle(PIN_A6); break;
case 'F': beep(); output_toggle(PIN_A7); break;
default: break;
}
}
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_________________
Regards,
Devil
Last edited by devilfrmheaven on Mon Nov 14, 2016 12:01 pm; edited 1 time in total |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Nov 13, 2016 10:22 am |
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| Where's your #use touchpad() line ? I don't see it. |
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devilfrmheaven
Joined: 09 Feb 2016
Posts: 53
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| Sorry it was in the header file. |
| Posted: Sun Nov 13, 2016 11:12 am |
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Sorry PCM programmer, It was in the header file.
| Code: |
#include <16F726.h>
#device adc=8
#FUSES NOWDT //No Watch Dog Timer
#FUSES INTRC //Internal RC Osc
#FUSES NOBROWNOUT //No brownout reset
#use delay(int=8000000)
#USE TOUCHPAD(RANGE=H, THRESHOLD=6, SCANTIME=32, PIN_B0='A', PIN_B1='B', PIN_B2='C', PIN_B3='D', PIN_B4='E', PIN_B5='F', PIN_A4='G', PIN_A5='H')
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_________________
Regards,
Devil |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Nov 13, 2016 1:00 pm |
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Your setup code has a few problems, as shown in bold below:
| Quote: |
#define MODBUS_TYPE MODBUS_TYPE_SLAVE
#define MODBUS_SERIAL_TYPE MODBUS_RTU //use MODBUS_ASCII for ASCII mode
#define MODBUS_SERIAL_RX_BUFFER_SIZE 64
#define MODBUS_SERIAL_BAUD 9600
#define MODBUS_SERIAL_INT_SOURCE MODBUS_INT_EXT //Source of interrupts (MODBUS_INT_EXT,MODBUS_INT_RDA,MODBUS_INT_RDA2)
#define MODBUS_SERIAL_RX_PIN PIN_c6 //Valid pin for serial receive
#define MODBUS_SERIAL_TX_PIN PIN_c7 //Valid pin for serial transmit
#define MODBUS_SERIAL_ENABLE_PIN PIN_c5 //Valid pin for serial enable, rs485 only
#define MODBUS_SERIAL_RX_ENABLE PIN_c5 //Valid pin for serial rcv enable, rs485 only
#define MODBUS_SERIAL_INT_SOURCE MODBUS_INT_RDA //Tipo de interrupção(assincrono) pro rs
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1. You have two conflicting interrupt sources. The first one says to use
the External interrupt (on Pin B0), but the 2nd one says to use the RDA
interrupt for the hardware UART. Choose the one you want and delete
the other one.
2. You have PIN_C6 defined for the serial Rx and PIN_C7 for Tx.
But they are the opposite of what they should be. The true actual
hardware TX pin is PIN_C6. The true hardware Rx pin is PIN_C7. See
page 3 in the Adobe Acrobat reader for the pinout of the 16F726:
http://ww1.microchip.com/downloads/en/DeviceDoc/40001341F.pdf |
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devilfrmheaven
Joined: 09 Feb 2016
Posts: 53
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| fixed the code already but not touch. |
| Posted: Sun Nov 13, 2016 1:58 pm |
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Thanks PCM.
I had corrected the codes you mentioned.
| Code: |
#define MODBUS_TYPE MODBUS_TYPE_SLAVE
#define MODBUS_SERIAL_TYPE MODBUS_RTU //use MODBUS_ASCII for ASCII mode
#define MODBUS_SERIAL_RX_BUFFER_SIZE 64
#define MODBUS_SERIAL_BAUD 9600
#define MODBUS_SERIAL_INT_SOURCE MODBUS_INT_EXT //Source of interrupts (MODBUS_INT_EXT,MODBUS_INT_RDA,MODBUS_INT_RDA2)
#define MODBUS_SERIAL_RX_PIN PIN_c7 //Valid pin for serial receive
#define MODBUS_SERIAL_TX_PIN PIN_c6 //Valid pin for serial transmit
#define MODBUS_SERIAL_ENABLE_PIN PIN_c5 //Valid pin for serial enable, rs485 only
#define MODBUS_SERIAL_RX_ENABLE PIN_c5 //Valid pin for serial rcv enable, rs485 only
#define MODBUS_SERIAL_INT_SOURCE MODBUS_INT_RDA //Tipo de interrupção(assincrono) pro rs
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Unfortunately the touch stops working as soon as I add
| Code: | | #include "modbus.c" |
_________________
Regards,
Devil |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19546
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| Posted: Sun Nov 13, 2016 2:31 pm |
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| You still show the two interrupt sources.... |
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devilfrmheaven
Joined: 09 Feb 2016
Posts: 53
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| Thanks MR T |
| Posted: Sun Nov 13, 2016 11:20 pm |
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Thanks MR T
The code was corrected already, I think modbus and capsense are sharing same timer. That must be the reason why capsense stops working as soon as modbus.c is included in the code.
Once Modbus was up and running I used this code
| Code: | if(touchpad_hit())
{
msg=touchpad_getc();
hold_regs[1] = msg;
}
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I saw that touchpad_getc was being called each time modbus master pings the slave. The register was being updated with Values between 85 and 90
| Code: |
#include <main.h>
#define MODBUS_TYPE MODBUS_TYPE_SLAVE
#define MODBUS_SERIAL_TYPE MODBUS_RTU //use MODBUS_ASCII for ASCII mode
#define MODBUS_SERIAL_RX_BUFFER_SIZE 64
#define MODBUS_SERIAL_BAUD 9600
#define MODBUS_SERIAL_RX_PIN PIN_c7 //Valid pin for serial receive
#define MODBUS_SERIAL_TX_PIN PIN_c6 //Valid pin for serial transmit
#define MODBUS_SERIAL_ENABLE_PIN PIN_c5 //Valid pin for serial enable, rs485 only
#define MODBUS_SERIAL_RX_ENABLE PIN_c5 //Valid pin for serial rcv enable, rs485 only
#define MODBUS_SERIAL_INT_SOURCE MODBUS_INT_RDA //Tipo de interrupção(assincrono) pro rs
#include "modbus.c" // <- this line
#define MODBUS_ADDRESS 0x03
char msg="";
void initialize()
{
output_low(PIN_A0);
output_low(PIN_A1);
output_low(PIN_A2);
output_low(PIN_A3);
output_low(PIN_A6);
output_low(PIN_A7);
}
int8 swap_bits(int8 c)
{
return ((c&1)?128:0)|((c&2)?64:0)|((c&4)?32:0)|((c&8)?16:0)|((c&16)?8:0)
|((c&32)?4:0)|((c&64)?2:0)|((c&128)?1:0);
}
void beep(){
output_high(PIN_B6);
delay_ms(20);
output_low(PIN_B6);
}
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_________________
Regards,
Devil |
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RF_Developer
Joined: 07 Feb 2011
Posts: 839
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| Posted: Mon Nov 14, 2016 3:45 am |
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It is best not to think of the CCS code as drivers. It is really example code. They work on their own, and with properly written user code, but very often these "drivers" cannot work with each other as they use the same resources such as SPI & I2C interfaces, and in this case yes, timers.
The "drivers" provide a starting point, a leg up for you, but they don't do everything and won't work, without modification, for everyone in every situation. You, the coder, have to sort out what stuff is clashing and modify one, or only if you really have to, both of the "drivers" to get them playing nicely together.
And something else, you have clashing enables. That will not work. Only define both if you have two enables to your RS485 interface IC. Some do, but most have only one, which seems likely in your case. If so, drive it with the transmit enable and do not define the other (receive) enable. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19546
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| Posted: Mon Nov 14, 2016 8:37 am |
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Looking at it though they allow you to change the timer used. There is a define available MODBUS_TIMER_USED, allowing you to change which timer is used, for exactly this reason> 
#define MODBUS_TIMER_USED MODBUS_TIMER_T2 |
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devilfrmheaven
Joined: 09 Feb 2016
Posts: 53
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| Thanks Mr T |
| Posted: Mon Nov 14, 2016 12:01 pm |
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That solved the problem Mr T.
Thanks for the response people..
_________________
Regards,
Devil |
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