1 files changed, 94 insertions, 0 deletions
diff --git a/wirish/wirish_digital.cpp b/wirish/wirish_digital.cpp
new file mode 100644
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+++ b/wirish/wirish_digital.cpp
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+/******************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2010 Perry Hung.
+ * Copyright (c) 2012 LeafLabs, LLC.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *****************************************************************************/
+
+/*
+ * Arduino-compatible digital I/O implementation.
+ */
+
+#include <wirish/io.h>
+
+#include <libmaple/gpio.h>
+#include <libmaple/timer.h>
+
+#include <wirish/wirish_time.h>
+#include <wirish/boards.h>
+
+uint32 digitalRead(uint8 pin) {
+    if (pin >= BOARD_NR_GPIO_PINS) {
+        return 0;
+    }
+
+    return gpio_read_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit) ?
+        HIGH : LOW;
+}
+
+void digitalWrite(uint8 pin, uint8 val) {
+    if (pin >= BOARD_NR_GPIO_PINS) {
+        return;
+    }
+
+    gpio_write_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit, val);
+}
+
+void togglePin(uint8 pin) {
+    if (pin >= BOARD_NR_GPIO_PINS) {
+        return;
+    }
+
+    gpio_toggle_bit(PIN_MAP[pin].gpio_device, PIN_MAP[pin].gpio_bit);
+}
+
+#define BUTTON_DEBOUNCE_DELAY 1
+
+uint8 isButtonPressed(uint8 pin, uint32 pressedLevel) {
+    if (digitalRead(pin) == pressedLevel) {
+        delay(BUTTON_DEBOUNCE_DELAY);
+        while (digitalRead(pin) == pressedLevel)
+            ;
+        return true;
+    }
+    return false;
+}
+
+uint8 waitForButtonPress(uint32 timeout) {
+    uint32 start = millis();
+    uint32 time;
+    if (timeout == 0) {
+        while (!isButtonPressed())
+            ;
+        return true;
+    }
+    do {
+        time = millis();
+        /* properly handle wrap-around */
+        if ((start > time && time + (0xffffffffU - start) > timeout) ||
+            time - start > timeout) {
+            return false;
+        }
+    } while (!isButtonPressed());
+    return true;
+}