[Keyboard] Add Torn keyboard (#10207)

* Add Torn keyboard

* Apply suggestions from code review

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Remove via json file

* Add mcp23081_pin_t

* Apply suggestions from code review

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Apply suggestions from code review

Co-authored-by: Ryan <fauxpark@gmail.com>

Co-authored-by: Richard Titmuss <richardt@spotify.com>
Co-authored-by: Nick Brassel <nick@tzarc.org>
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/keyboards/torn/torn.c b/keyboards/torn/torn.c
new file mode 100644
index 0000000000..ef5060e602
--- /dev/null
+++ b/keyboards/torn/torn.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2020 Richard Titmuss <richard.titmuss@gmail.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 "torn.h"
+#include "i2c_master.h"
+#include "mcp23018.h"
+
+static uint8_t led_state[3] = {1, 1, 1};
+
+void matrix_init_kb(void) {
+    // put your keyboard start-up code here
+    // runs once when the firmware starts up
+    i2c_init();
+
+    matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+    // put your looping keyboard code here
+    // runs every cycle (a lot)
+    if (mcp23018_reset_required()) {
+        msp23018_init();
+        secondary_encoder_init();
+        // torn_set_led(2, 1);
+    }
+
+    matrix_scan_user();
+    secondary_encoder_read();
+}
+
+void torn_set_led(uint8_t led, bool state) {
+    led_state[led] = !state;
+
+    // toggle leds by setting the pin direction
+    uint8_t iodir = 0b11111000 | led_state[0] << 2 | led_state[1] << 1 | led_state[2];
+    mcp23018_writeReg(IODIRB, &iodir, 1);
+}