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Momboz
Joined: 03 Jun 2009
Posts: 29
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| Help on CLC1 example on PIC16F15325 |
 Posted: Wed Jul 24, 2019 9:39 am |
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Trying to understand, but no success, i.e. no signal on RA5 when trying combinations of buttons RC3 and RC4.
Could someone help?
Here is my code:
| Code: | #include <16F15325.h>
#device ADC=10
#use delay(internal=32MHz)
#define LED PIN_A1
#define DELAY 1
#byte CLC1GLS0 = getenv("SFR:CLC1GLS0")
#byte CLC1GLS1 = getenv("SFR:CLC1GLS1")
#byte CLC1GLS2 = getenv("SFR:CLC1GLS2")
#byte CLC1GLS3 = getenv("SFR:CLC1GLS3")
#byte CLC1SEL0 = getenv("SFR:CLC1SEL0")
#byte CLC1SEL1 = getenv("SFR:CLC1SEL1")
#byte CLC1SEL2 = getenv("SFR:CLC1SEL2")
#byte CLC1SEL3 = getenv("SFR:CLC1SEL3")
#byte CLC1POL = getenv("SFR:CLC1POL")
#byte CLC1CON = getenv("SFR:CLC1CON")
#byte CLCDATA = getenv("SFR:CLCDATA")
#byte CLCIN0PPS = getenv("SFR:CLCIN0PPS")
#byte CLCIN1PPS = getenv("SFR:CLCIN1PPS")
#byte CLCIN2PPS = getenv("SFR:CLCIN2PPS")
#byte CLCIN3PPS = getenv("SFR:CLCIN3PPS")
#pin_select CLC1OUT=PIN_A5
#pin_select CLCIN0=PIN_C3
#pin_select CLCIN1=PIN_C4
void main() {
SET_TRIS_C( 0b011000 );
CLC1CON = 0x82;
CLCIN0PPS = 0x13;
CLCIN1PPS = 0x14;
CLCIN2PPS = 0x10;
CLCIN3PPS = 0x10;
CLC1GLS0 = 0x0A;
CLC1GLS1 = 0x00;
CLC1GLS2 = 0x00;
CLC1GLS3 = 0x00;
CLC1SEL0 = 0x00;
CLC1SEL1 = 0x01;
CLC1SEL2 = 0x1B;
CLC1SEL3 = 0x1E;
CLC1POL = 0x8E;
while(TRUE) {
output_toggle(LED);
delay_ms(DELAY);
}
} |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19539
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| Posted: Wed Jul 24, 2019 10:41 am |
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Glaring thing is you can't just write to the PPS registers.
The chip has to have a very specific 'unlock' sequence before it'll
accept changes to the PPS.
Use the CCS #PIN_SELECT to setup the PPS. |
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Momboz
Joined: 03 Jun 2009
Posts: 29
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| Posted: Wed Jul 24, 2019 3:00 pm |
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I thought this is what I have been doing in using the following code for PPS remapping.
| Code: |
#pin_select CLC1OUT=PIN_A5
#pin_select CLCIN0=PIN_C3
#pin_select CLCIN1=PIN_C4
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I am directly writing just to the CLC1 registers, not to PPS registers.
Did I misunderstand things? |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Jul 24, 2019 3:46 pm |
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Look at your posted code:
| Quote: |
CLCIN0PPS = 0x13;
CLCIN1PPS = 0x14;
CLCIN2PPS = 0x10;
CLCIN3PPS = 0x10;
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Yes, you are writing directly to the PPS registers without doing the
unlocking sequence. |
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Momboz
Joined: 03 Jun 2009
Posts: 29
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| Posted: Thu Aug 01, 2019 8:09 am |
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Yes, you're right. I've missed those code lines.
I did review my code and now everything works fine. I did it in an easier way:
| Code: | setup_clc1(CLC_ENABLED | CLC_MODE_AND);
clc1_setup_input(1, CLC_INPUT_CLCIN0);
clc1_setup_input(2, CLC_INPUT_CLCIN1);
clc1_setup_gate(1, CLC_GATE_OR);
clc1_setup_gate(2, CLC_GATE_SET);
clc1_setup_gate(3, CLC_GATE_SET);
clc1_setup_gate(4, CLC_GATE_SET); |
However, I have noticed that, the coding in CCS C Compiler differs from that in MPLAB XC8. The difference is in the inputs selection register.
MPLAB takes account that inputs are not connected, e.g. in my case it says
CLC1GLS0=0x0A and CCS C Compiler says CLC1GLS0=0xAA.
In my case, this makes no difference, because I am not using any other signal outside these 2.
Maybe there is a way to tell the gate that the other 2 inputs are disconnected. |
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