1 files changed, 79 insertions, 0 deletions
diff --git a/keyboards/ploopyco/adns5050.h b/keyboards/ploopyco/adns5050.h
new file mode 100644
index 0000000000..ff8e8f78e9
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+++ b/keyboards/ploopyco/adns5050.h
@@ -0,0 +1,79 @@
+/* Copyright 2021 Colin Lam (Ploopy Corporation)
+ * Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
+ * Copyright 2019 Sunjun Kim
+ * Copyright 2019 Hiroyuki Okada
+ *
+ * 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/>.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+
+// Registers
+#define REG_PRODUCT_ID 0x00
+#define REG_REVISION_ID 0x01
+#define REG_MOTION 0x02
+#define REG_DELTA_X 0x03
+#define REG_DELTA_Y 0x04
+#define REG_SQUAL 0x05
+#define REG_SHUTTER_UPPER 0x06
+#define REG_SHUTTER_LOWER 0x07
+#define REG_MAXIMUM_PIXEL 0x08
+#define REG_PIXEL_SUM 0x09
+#define REG_MINIMUM_PIXEL 0x0a
+#define REG_PIXEL_GRAB 0x0b
+#define REG_MOUSE_CONTROL 0x0d
+#define REG_MOUSE_CONTROL2 0x19
+#define REG_LED_DC_MODE 0x22
+#define REG_CHIP_RESET 0x3a
+#define REG_PRODUCT_ID2 0x3e
+#define REG_INV_REV_ID 0x3f
+#define REG_MOTION_BURST 0x63
+
+// CPI values
+#define CPI125 0x11
+#define CPI250 0x12
+#define CPI375 0x13
+#define CPI500 0x14
+#define CPI625 0x15
+#define CPI750 0x16
+#define CPI875 0x17
+#define CPI1000 0x18
+#define CPI1125 0x19
+#define CPI1250 0x1a
+#define CPI1375 0x1b
+
+#ifdef CONSOLE_ENABLE
+void print_byte(uint8_t byte);
+#endif
+
+typedef struct {
+    int8_t dx;
+    int8_t dy;
+} report_adns_t;
+
+// A bunch of functions to implement the ADNS5050-specific serial protocol.
+// Note that the "serial.h" driver is insufficient, because it does not
+// manually manipulate a serial clock signal.
+void adns_init(void);
+void adns_sync(void);
+uint8_t adns_serial_read(void);
+void adns_serial_write(uint8_t data);
+uint8_t adns_read_reg(uint8_t reg_addr);
+void adns_write_reg(uint8_t reg_addr, uint8_t data);
+report_adns_t adns_read_burst(void);
+int8_t convert_twoscomp(uint8_t data);
+void adns_set_cpi(uint8_t cpi);
+bool adns_check_signature(void);