Demo: Add walking one/walking zero pattern

[libsigrok.git] / src / hardware / demo / protocol.c

diff --git a/src/hardware/demo/protocol.c b/src/hardware/demo/protocol.c
index 242d471ee26831fcf6f7240d0cc0f44fa1e1541c..7f5950b6b87188af6fa495eba402f69e8f37d8b7 100644 (file)
--- a/src/hardware/demo/protocol.c
+++ b/src/hardware/demo/protocol.c
@@ -279,6 +279,35 @@ static void logic_generator(struct sr_dev_inst *sdi, uint64_t size)
                        devc->step++;
                }
                break;
+       case PATTERN_WALKING_ONE:
+               /* j contains the value of the highest bit */
+               j = 1 << (devc->num_logic_channels - 1);
+               for (i = 0; i < size; i++) {
+                       devc->logic_data[i] = devc->step;
+                       if (devc->step == 0)
+                               devc->step = 1;
+                       else
+                               if (devc->step == j)
+                                       devc->step = 0;
+                               else
+                                       devc->step <<= 1;
+               }
+               break;
+       case PATTERN_WALKING_ZERO:
+               /* Same as walking one, only with inverted output */
+               /* j contains the value of the highest bit */
+               j = 1 << (devc->num_logic_channels - 1);
+               for (i = 0; i < size; i++) {
+                       devc->logic_data[i] = ~devc->step;
+                       if (devc->step == 0)
+                               devc->step = 1;
+                       else
+                               if (devc->step == j)
+                                       devc->step = 0;
+                               else
+                                       devc->step <<= 1;
+               }
+               break;
        case PATTERN_ALL_LOW:
        case PATTERN_ALL_HIGH:
                /* These were set when the pattern mode was selected. */