Split GamePadShift from GamePad to save space on most boards.

3 files changed, 136 insertions, 0 deletions

diff --git a/shared-module/gamepadshift/GamePadShift.c b/shared-module/gamepadshift/GamePadShift.c
new file mode 100644
index 000000000..1dadfb9b2
--- /dev/null
+++ b/shared-module/gamepadshift/GamePadShift.c
@@ -0,0 +1,64 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
+ *
+ * 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.
+ */
+
+#include "py/mpstate.h"
+#include "shared-bindings/digitalio/DigitalInOut.h"
+#include "shared-module/gamepadshift/GamePadShift.h"
+
+void common_hal_gamepadshift_gamepadshift_init(gamepadshift_obj_t *gamepadshift,
+                                                digitalio_digitalinout_obj_t *data_pin,
+                                                digitalio_digitalinout_obj_t *clock_pin,
+                                                digitalio_digitalinout_obj_t *latch_pin) {
+    common_hal_digitalio_digitalinout_switch_to_input(data_pin, PULL_NONE);
+    gamepadshift->data_pin = data_pin;
+    common_hal_digitalio_digitalinout_switch_to_output(clock_pin, 0,
+                                                       DRIVE_MODE_PUSH_PULL);
+    gamepadshift->clock_pin = clock_pin;
+    common_hal_digitalio_digitalinout_switch_to_output(latch_pin, 1,
+                                                       DRIVE_MODE_PUSH_PULL);
+    gamepadshift->latch_pin = latch_pin;
+}
+
+void common_hal_gamepadshift_gamepadshift_deinit(gamepadshift_obj_t *gamepadshift) {
+    MP_STATE_VM(gamepad_singleton) = NULL;
+}
+
+void gamepadshift_tick(gamepadshift_obj_t *self) {
+    uint8_t current = 0;
+    uint8_t bit = 1;
+    common_hal_digitalio_digitalinout_set_value(self->latch_pin, 1);
+    for (int i = 0; i < 8; ++i) {
+        common_hal_digitalio_digitalinout_set_value(self->clock_pin, 0);
+        if (common_hal_digitalio_digitalinout_get_value(self->data_pin)) {
+            current |= bit;
+        }
+        common_hal_digitalio_digitalinout_set_value(self->clock_pin, 1);
+        bit <<= 1;
+    }
+    common_hal_digitalio_digitalinout_set_value(self->latch_pin, 0);
+    self->pressed |= self->last & current;
+    self->last = current;
+}
diff --git a/shared-module/gamepadshift/GamePadShift.h b/shared-module/gamepadshift/GamePadShift.h
new file mode 100644
index 000000000..ccbf5ca06
--- /dev/null
+++ b/shared-module/gamepadshift/GamePadShift.h
@@ -0,0 +1,45 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
+ *
+ * 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.
+ */
+
+#ifndef MICROPY_INCLUDED_GAMEPADSHIFT_GAMEPADSHIFT_H
+#define MICROPY_INCLUDED_GAMEPADSHIFT_GAMEPADSHIFT_H
+
+#include <stdint.h>
+
+#include "shared-bindings/digitalio/DigitalInOut.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    digitalio_digitalinout_obj_t* data_pin;
+    digitalio_digitalinout_obj_t* clock_pin;
+    digitalio_digitalinout_obj_t* latch_pin;
+    volatile uint8_t pressed;
+    volatile uint8_t last;
+} gamepadshift_obj_t;
+
+void gamepadshift_tick(gamepadshift_obj_t *self);
+
+#endif  // MICROPY_INCLUDED_GAMEPADSHIFT_GAMEPADSHIFT_H
diff --git a/shared-module/gamepadshift/__init__.c b/shared-module/gamepadshift/__init__.c
new file mode 100644
index 000000000..c3bb83e34
--- /dev/null
+++ b/shared-module/gamepadshift/__init__.c
@@ -0,0 +1,27 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Scott Shawcroft
+ *
+ * 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.
+ */
+
+// Nothing now.