Hi!
I try read encoder connected to xplain board.
Encoder connected to pins 0 and 1 of PORTD.
Inputs of PORTD.0 and PORTD.1 are oututs to leds connected to PORTE. Leds are flashes when encoder rotating.
I output timer counter values into LCD.
Probles is that counter values such as if they are random :(
I use codevision compiler.
.................
// Event System initialization
void event_system_init(void)
{
// Event System Channel 0 source: Port D, Pin0
EVSYS.CH0MUX=EVSYS_CHMUX_PORTD_PIN0_gc;
// Event System Channel 1 source: None
EVSYS.CH1MUX=EVSYS_CHMUX_OFF_gc;
...............
// PORTD initialization
// OUT register
PORTD.OUT=0x00;
// Bit0:7: Input
PORTD.DIR=0x00;
// Bit0 Output/Pull configuration: Totempole/No
// Bit0 Input/Sense configuration: Sense low level
// Bit0 inverted: Off
// Bit0 slew rate limitation: Off
PORTD.PIN0CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_LEVEL_gc;
// Bit1 Output/Pull configuration: Totempole/No
// Bit1 Input/Sense configuration: Sense low level
// Bit1 inverted: Off
// Bit1 slew rate limitation: Off
PORTD.PIN1CTRL=PORT_OPC_TOTEM_gc | PORT_ISC_LEVEL_gc;
// Bit2 Output/Pull configuration: Totempole/No
// Bit2 Input/Sense configuration: Sense both edges
// Bit2 inverted: Off
// Bit2 slew rate limitation: Off
.......................
// Disable and reset the timer/counter just to be sure
tc0_disable(&TCC0);
// Clock source: Peripheral Clock/1
TCC0.CTRLA=(TCC0.CTRLA & (~TC0_CLKSEL_gm)) | TC_CLKSEL_DIV64_gc;
// Mode: Normal Operation, Overflow Int./Event on TOP
// Compare/Capture on channel A:D: Off
TCC0.CTRLB=(TCC0.CTRLB & (~(TC0_CCAEN_bm | TC0_CCBEN_bm | TC0_CCCEN_bm | TC0_CCDEN_bm | TC0_WGMODE_gm))) |
TC_WGMODE_NORMAL_gc;
// Capture event source: Event Channel 0
// Capture event action: Quadrature Decode
TCC0.CTRLD=(TCC0.CTRLD & (~(TC0_EVACT_gm | TC0_EVSEL_gm))) |
TC_EVACT_QDEC_gc | TC_EVSEL_CH0_gc;
// Overflow interrupt: Disabled
// Error interrupt: Disabled
TCC0.INTCTRLA=(TCC0.INTCTRLA & (~(TC0_ERRINTLVL_gm | TC0_OVFINTLVL_gm))) |
TC_ERRINTLVL_OFF_gc | TC_OVFINTLVL_OFF_gc;
// Compare/Capture channel A:D interrupt: Disabled
TCC0.INTCTRLB=(TCC0.INTCTRLB & (~(TC0_CCDINTLVL_gm | TC0_CCCINTLVL_gm | TC0_CCBINTLVL_gm | TC0_CCAINTLVL_gm))) |
TC_CCDINTLVL_OFF_gc | TC_CCCINTLVL_OFF_gc | TC_CCBINTLVL_OFF_gc | TC_CCAINTLVL_OFF_gc;
// High resolution extension: Off
HIRESC.CTRL&= ~HIRES_HREN0_bm;
// Advanced Waveform Extension initialization
// Optimize for speed
#pragma optsize-
// Disable locking the AWEX configuration registers just to be sure
n=MCU.AWEXLOCK & (~MCU_AWEXCLOCK_bm);
CCP=CCP_IOREG_gc;
MCU.AWEXLOCK=n;
// Restore optimization for size if needed
#pragma optsize_default
// Pattern generation: Off
// Dead time insertion: Off
AWEXC.CTRL&= ~(AWEX_PGM_bm | AWEX_CWCM_bm | AWEX_DTICCDEN_bm | AWEX_DTICCCEN_bm | AWEX_DTICCBEN_bm | AWEX_DTICCAEN_bm);
// Fault protection initialization
// Fault detection on OCD Break detection: On
// Fault detection restart mode: Latched Mode
// Fault detection action: None (Fault protection disabled)
AWEXC.FDCTRL=(AWEXC.FDCTRL & (~(AWEX_FDDBD_bm | AWEX_FDMODE_bm | AWEX_FDACT_gm))) |
AWEX_FDACT_NONE_gc;
// Fault detect events:
// Event channel 0:7: Off
AWEXC.FDEVMASK=0b00000000;
// Make sure the fault detect flag is cleared
AWEXC.STATUS|=AWEXC.STATUS & AWEX_FDF_bm;
// Clear the interrupt flags
TCC0.INTFLAGS=TCC0.INTFLAGS;
// Set counter register
TCC0.CNT=0x0000;
// Set period register
TCC0.PER=3999;
// Set channel A:D Compare/Capture register
TCC0.CCA=0x0000;
TCC0.CCB=0x0000;
TCC0.CCC=0x0000;
TCC0.CCD=0x0000;
// Restore interrupts enabled/disabled state
SREG=s;
}
.........................
EN=TCC0.CNT; //var int EN
My encoder 1000 puls/revolution.
Thank for help :)
