experiments with knob

main/gui.c

@@ -33,11 +33,16 @@ static void __attribute__((noreturn)) gui_thread(void *arg) {
         if (value &  0b100) {
             printf("RELS ");
         }
+
+        if ((value & 0b11) == 0b11) {
+            printf("BNCE ");
+        } else {
             if (value & 0b01) {
                 printf("FWD  ");
                 if (pos == NMAX) {
                     pos = 0;
-            } else {
+                }
+                else {
                     pos += 1;
                 }
             }
@@ -45,10 +50,12 @@ static void __attribute__((noreturn)) gui_thread(void *arg) {
                 printf("BACK ");
                 if (pos == 0) {
                     pos = NMAX;
-            } else {
+                }
+                else {
                     pos--;
                 }
             }
+        }
 
         printf(">");
         for (int i=0; i<pos; i++) {

main/knob.c

@@ -69,7 +69,7 @@ const uint8_t switch_table[28] = {
     /* -- S_FWD_1_01 -- */
     S_FWD_2_00, /* 00 ADVANCE */
     S_FWD_1_01, /* 01 */
-    S_ILLEGAL,  /* 10 ILLEGAL */
+    S_FWD_3_10,  /* 10 ILLEGAL */
     S_11,       /* 11 ABORT */
 
     /* -- S_FWD_2_00 -- */
@@ -80,13 +80,13 @@ const uint8_t switch_table[28] = {
 
     /* -- S_FWD_3_10 -- */
     S_FWD_2_00, /* 00 ABORT */
-    S_ILLEGAL,  /* 01 ILLEGAL */
+    S_FWD_1_01,  /* 01 ILLEGAL */
     S_FWD_3_10, /* 10 */
     SW_FWD | S_11, /* 11 ADVANCE */
 
     /* -- S_BCK_1_10 -- */
     S_BCK_2_00, /* 00 ADVANCE */
-    S_ILLEGAL, /* 01 ILLEGAL */
+    S_BCK_3_01, /* 01 ILLEGAL */
     S_BCK_1_10, /* 10 */
     S_11,       /* 11 ABORT */
 
@@ -99,14 +99,59 @@ const uint8_t switch_table[28] = {
     /* -- S_BCK_3_01 -- */
     S_BCK_2_00, /* 00 */
     S_BCK_3_01, /* 01 */
-    S_ILLEGAL, /* 10 */
+    S_BCK_1_10, /* 10 */
     SW_BCK | S_11, /* 11 */
 };
 
+static uint8_t OldEnc = 0b00;
+
 static void handle_wheel(void *arg) {
     int dir = 0;
 
+
 #if 0
+    const uint32_t inputs = gpio_input_get();
+    bool a = 0 == (inputs & (1 << wheelPin1)); // neg = active
+    bool b = 0 == (inputs & (1 << wheelPin2));
+
+#define ENCODER_POS1 1
+#define ENCODER_POS2 2
+#define ENCODER_POS3 3
+#define ENCODER_POS0 0
+
+    uint8_t NewEnc = a | (b<<1);
+    if (NewEnc ^ OldEnc) { // Encoder value changed???
+        switch(NewEnc) {
+            case ENCODER_POS1 : // 01
+                if (OldEnc == ENCODER_POS0) // 00
+                    dir--;
+                else
+                    dir++;
+                break;
+            case ENCODER_POS3 : // 11
+                if (OldEnc == ENCODER_POS1) // 01
+                    dir--;
+                else
+                    dir++;
+                break;
+            case ENCODER_POS2 : // 10
+                if (OldEnc == ENCODER_POS3) // 11
+                    dir--;
+                else
+                    dir++;
+                break;
+            case ENCODER_POS0 : // 00
+                if (OldEnc == ENCODER_POS2) // 10
+                    dir--;
+                else
+                    dir++;
+                break;
+        };
+        OldEnc = NewEnc;
+    }; // end if encoder value changed.
+#endif
+
+#if 1
     // Omron version
     int which = (int)arg;
 
@@ -149,20 +194,20 @@ static void handle_wheel(void *arg) {
     if (which == 0) { // itr from A
         if (b) {
             dir = -1;
-        } else {
+        } /*else {
             dir = 1;
-        }
+        }*/
     }
     else { // itr from B
         if (a) {
             dir = 1;
-        } else {
+        } /*else {
             dir = -1;
-        }
+        }*/
     }
 #endif
 
-#if 1
+#if 0
     // More complex version
     const uint32_t inputs = gpio_input_get();
     const uint8_t ab =