summaryrefslogtreecommitdiff
path: root/keyboards/gboards/gergoplex/gergoplex.c
diff options
context:
space:
mode:
Diffstat (limited to 'keyboards/gboards/gergoplex/gergoplex.c')
-rw-r--r--keyboards/gboards/gergoplex/gergoplex.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/keyboards/gboards/gergoplex/gergoplex.c b/keyboards/gboards/gergoplex/gergoplex.c
new file mode 100644
index 0000000000..1e44583895
--- /dev/null
+++ b/keyboards/gboards/gergoplex/gergoplex.c
@@ -0,0 +1,68 @@
+/* Copyright 2021 Jane Bernhardt
+ *
+ * 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 "gergoplex.h"
+
+bool i2c_initialized = 0;
+i2c_status_t mcp23018_status = 0x20;
+
+void matrix_init_kb(void) {
+ matrix_init_user();
+}
+
+uint8_t init_mcp23018(void) {
+ print("starting init");
+ mcp23018_status = 0x20;
+
+ // I2C subsystem
+
+ if (i2c_initialized == 0) {
+ i2c_init(); // on pins D(1,0)
+ i2c_initialized = true;
+ _delay_ms(1000);
+ }
+
+ // set pin direction
+ // - unused : input : 1
+ // - input : input : 1
+ // - driving : output : 0
+ mcp23018_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
+ if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(IODIRA, I2C_TIMEOUT);
+ if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0b11000001, I2C_TIMEOUT);
+ if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0b11111111, I2C_TIMEOUT);
+ if (mcp23018_status) goto out;
+ i2c_stop();
+
+ // set pull-up
+ // - unused : on : 1
+ // - input : on : 1
+ // - driving : off : 0
+ mcp23018_status = i2c_start(I2C_ADDR_WRITE, I2C_TIMEOUT);
+ if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(GPPUA, I2C_TIMEOUT);
+ if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0b11000001, I2C_TIMEOUT);
+ if (mcp23018_status) goto out;
+ mcp23018_status = i2c_write(0b11111111, I2C_TIMEOUT);
+ if (mcp23018_status) goto out;
+
+out:
+ i2c_stop();
+ return mcp23018_status;
+}