I'm trying to get the quadrature decoder interrupts working. I am using a TSWA3NCD23LFS rotary encoder push button. I have the ACOM pin wired directly...
Show More
I'm trying to get the quadrature decoder interrupts working. I am using a TSWA3NCD23LFS rotary encoder push button. I have the ACOM pin wired directly to P1.1 and the BCOM pin wired directly to 0.13. I set both pins to pull-up inputs on their corresponding IOCR's (PORT0 -> IOCR12 = 0x000010C0; and PORT1 -> IOCR0 = 0x80101080; ). Here are the following Quadrature Decoder bits that I set:
POSIF0 -> PRUNC = 0x03; // Stop and reset POSIF 0
// Quadrature Decode Mode Enable (FSEL)
// Direction Count Mode (QDCM)
// IN0B (0.13 BCOM) for Phase A (INSEL0)
// IN1A (1.1 ACOM) for Phase B (INSEL1)
// Max lowpass
POSIF0 -> PCONF = 0x70000101; // 0000 0000 0000 0000 0000 0001 0000 0101
POSIF0 -> PSUS = 0x00000000; // Use suspend mode defaults
// Phase A active high (PALS)
// Phase B active high (PBLS)
// Clockwise, Phase A (BCOM) leading (PHS)
POSIF0 -> QDC = 0x00000003;
POSIF0 -> PFLGE = 0x00000000; // Disable all POSIF 0 interrupts
Here are my clock settings:
SCU_GENERAL -> PASSWD = 0x000000C0; // Disable bit protection scheme
// Configure CCU40 Global Settings
CCU40 -> GCTRL = 0x00000000; // Use global control defaults
CCU40 -> GIDLC = 0x0000010F; // Bring all slices and prescaler out of idle
// Set up CCU4.1.0 to work with Rotary encoder control
CCU40_CC40 -> TCCLR = 0x00000007; // Stop and clear timer; clear dither counter.
CCU40_CC40 -> INS = 0x003F0455; // POSIF 1 CLK -> Event 0, 1, and 2; Event 1 rising edge enable only. 0001 0000 0100 0100 0100
CCU40_CC40 -> CMC = 0x00000001; // Event 0 -> start.
CCU40_CC40 -> TC = 0x00000402; // Set timer to one-shot mode, Event 0 clears and starts timer.
CCU40_CC40 -> PSC = 0x0000000D; // Set prescaler to divide by 8192.
CCU40_CC40 -> PRS = 20UL; // Set period shadow register to 50 (~5mS period).
CCU40_CC40 -> INTE = 0x00000001; // Enable counter interrupt on period match.
CCU40 -> GCSS = 0x00001111; // Initiate shadow transfer.
I then enable the interrupt CCU40_0:
NVIC_EnableIRQ(CCU40_0_IRQn);
I also am trying to capture any of the decoder values but nothing changes when I turn the rotary encoder. Values are always as follows corresponding to the order they are listed below: 0, 2, 4, 8.
current = POSIF_PDBG_QCSV_Pos; // Current position of encoder
previous = POSIF_PDBG_QPSV_Pos; // Previous position of encoder
ival = POSIF_PDBG_IVAL_Pos; // Current index of encoder
direction = POSIF_QDC_DVAL_Pos;
I have the interrupt functions declared and it should write text to an matrix display if entered:
void CCU40_0_IRQHandler(void){
int i;
for(i=0;i<100;i++){
serial_tx(2, text, asciilookup, displayBytesLetters);
}
return;
}
As I debug line by line, the POSIF0 registers are not even changing as I assign each register its new value. Is the debugger not fully functional on the latest version of Dave or am I doing something wrong?
Show Less
