From 65f8ee7dc81c1a119de0300dddc5fe2eb87cc2d6 Mon Sep 17 00:00:00 2001
From: Don Armstrong <don@donarmstrong.com>
Date: Sun, 30 Apr 2017 20:47:40 -0700
Subject: [PATCH] add initial support for left leds on an ergodox ez

---
 layouts/community/ergodox/don/Makefile |  4 +++
 layouts/community/ergodox/don/keymap.c | 40 ++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/layouts/community/ergodox/don/Makefile b/layouts/community/ergodox/don/Makefile
index cae19a6f4..14b5afbde 100644
--- a/layouts/community/ergodox/don/Makefile
+++ b/layouts/community/ergodox/don/Makefile
@@ -15,9 +15,13 @@ UNICODE_ENABLE = yes         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 RGBLIGHT_ENABLE = no        # Enable WS2812 RGB underlight.  Do not enable this with audio at the same time.
 SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+ifeq ($(SUBPROJECT_DIR),'infinity')
 VISUALIZER_ENABLE = yes
 LCD_BACKLIGHT_ENABLE = yes
 LCD_ENABLE = yes
+else
+OPT_DEFS+= -DLEFT_LEDS
+endif
 
 dfu-util: $(BUILD_DIR)/$(TARGET).bin sizeafter
 	while true; do \
diff --git a/layouts/community/ergodox/don/keymap.c b/layouts/community/ergodox/don/keymap.c
index 21e71a4ce..39da4d6c2 100644
--- a/layouts/community/ergodox/don/keymap.c
+++ b/layouts/community/ergodox/don/keymap.c
@@ -206,3 +206,43 @@ void matrix_init_user(void) {
 void matrix_scan_user(void) {
 
 };
+
+// if this is my ergodox ez, I have left LEDs.
+#ifdef LEFT_LEDS
+
+extern bool ergodox_left_led_1;
+extern bool ergodox_left_led_2;
+extern bool ergodox_left_led_3;
+
+
+uint8_t ergodox_left_leds_update(void) {
+    if (mcp23018_status) { // if there was an error
+        return mcp23018_status;
+    }
+#define LEFT_LED_1_SHIFT        7       // in MCP23018 port B
+#define LEFT_LED_2_SHIFT        6       // in MCP23018 port B
+#define LEFT_LED_3_SHIFT        7       // in MCP23018 port A
+
+    // set logical value (doesn't matter on inputs)
+    // - unused  : hi-Z : 1
+    // - input   : hi-Z : 1
+    // - driving : hi-Z : 1
+    mcp23018_status = i2c_start(I2C_ADDR_WRITE);
+    if (mcp23018_status) goto out;
+    mcp23018_status = i2c_write(OLATA);
+    if (mcp23018_status) goto out;
+    mcp23018_status = i2c_write(0b11111111
+                                & ~(ergodox_left_led_3<<LEFT_LED_3_SHIFT)
+                                );
+    if (mcp23018_status) goto out;
+    mcp23018_status = i2c_write(0b11111111
+                                & ~(ergodox_left_led_2<<LEFT_LED_2_SHIFT)
+                                & ~(ergodox_left_led_1<<LEFT_LED_1_SHIFT)
+                                );
+    if (mcp23018_status) goto out;
+
+ out:
+    i2c_stop();
+    return mcp23018_status;
+}
+#endif
-- 
2.39.5