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-rw-r--r--quantum/dip_switch.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/quantum/dip_switch.c b/quantum/dip_switch.c
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+++ b/quantum/dip_switch.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2018 Jack Humbert <jack.humb@gmail.com>
+ * Copyright 2019 Drashna Jaelre (Christopher Courtney) <drashna@live.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "dip_switch.h"
+
+// for memcpy
+#include <string.h>
+
+
+#if !defined(DIP_SWITCH_PINS)
+# error "No DIP switch pads defined by DIP_SWITCH_PINS"
+#endif
+
+#define NUMBER_OF_DIP_SWITCHES (sizeof(dip_switch_pad)/sizeof(pin_t))
+static pin_t dip_switch_pad[] = DIP_SWITCH_PINS;
+static bool dip_switch_state[NUMBER_OF_DIP_SWITCHES] = { 0 };
+static bool last_dip_switch_state[NUMBER_OF_DIP_SWITCHES] = { 0 };
+
+
+__attribute__((weak))
+void dip_switch_update_user(uint8_t index, bool active) {}
+
+__attribute__((weak))
+void dip_switch_update_kb(uint8_t index, bool active) { dip_switch_update_user(index, active); }
+
+__attribute__((weak))
+void dip_switch_update_mask_user(uint32_t state) {}
+
+__attribute__((weak))
+void dip_switch_update_mask_kb(uint32_t state) { dip_switch_update_mask_user(state); }
+
+void dip_switch_init(void) {
+ for (uint8_t i = 0; i < NUMBER_OF_DIP_SWITCHES; i++) {
+ setPinInputHigh(dip_switch_pad[i]);
+ }
+ dip_switch_read(true);
+}
+
+
+void dip_switch_read(bool forced) {
+ bool has_dip_state_changed = false;
+ uint32_t dip_switch_mask = 0;
+
+ for (uint8_t i = 0; i < NUMBER_OF_DIP_SWITCHES; i++) {
+ dip_switch_state[i] = !readPin(dip_switch_pad[i]);
+ dip_switch_mask |= dip_switch_state[i] << i;
+ if (last_dip_switch_state[i] ^ dip_switch_state[i] || forced) {
+ has_dip_state_changed = true;
+ dip_switch_update_kb(i, dip_switch_state[i]);
+ }
+ }
+ if (has_dip_state_changed) {
+ dip_switch_update_mask_kb(dip_switch_mask);
+ }
+ memcpy(last_dip_switch_state, dip_switch_state, sizeof(&dip_switch_state));
+}