From 57e6319145a42b0ad65b06a626baef7c47f95066 Mon Sep 17 00:00:00 2001
From: Christian Loch <chris@skalarprodukt.de>
Date: Mon, 20 Apr 2020 19:48:33 +0200
Subject: [PATCH] Add Eva's temp to color functions

---
 components/display/display.c | 65 ++++++++++++++++++++++++++++++++++--
 1 file changed, 63 insertions(+), 2 deletions(-)

diff --git a/components/display/display.c b/components/display/display.c
index 5b97d0c..ccbda5f 100644
--- a/components/display/display.c
+++ b/components/display/display.c
@@ -114,6 +114,67 @@ layout_t create_layout()
 	return layout;
 }
 
+uint8_t interpolation(int32_t arg) {
+	int32_t i32_val = arg * 256 / 1000;
+	uint8_t u8_val = (uint8_t)i32_val;
+	return u8_val;
+}
+
+color_t temp_color(int32_t temp_raw) {
+	color_t col = { 0 };
+	if (temp_raw >= 3500)
+		col.r = 255;
+	else if (temp_raw < 3500 && temp_raw > 2500) {
+		int32_t diff = 3500 - temp_raw;
+		col.r = 255;
+		col.g = interpolation(diff);
+	}
+	else if (temp_raw == 2500) {
+		col.r = 255;
+		col.g = 255;
+	}
+	else if (temp_raw < 2500 && temp_raw > 1500) {
+		int32_t diff = temp_raw - 1500;
+		col.r = interpolation(diff);
+		col.g = 255;
+	}
+	else if (temp_raw == 1500)
+		col.g = 255;
+	else if (temp_raw < 1500 && temp_raw > 500) {
+		int32_t diff = 1500 - temp_raw;
+		col.g = 255;
+		col.b = interpolation(diff);
+	}
+	else if (temp_raw == 500) {
+		col.g = 255;
+		col.b = 255;
+	}
+	else if (temp_raw < 500 && temp_raw > -500) {
+		int32_t diff = temp_raw + 500;
+		col.g = interpolation(diff);
+		col.b = 255;
+	}
+	else if (temp_raw == -500)
+		col.b = 255;
+	else if (temp_raw < -500 && temp_raw > -1500) {
+		int32_t diff = -500 - temp_raw;
+		col.r = interpolation(diff);
+		col.b = 255;
+	}
+	else if (temp_raw <= -1500) {
+		col.r = 255;
+		col.b = 255;
+	}
+	return col;
+}
+
+int32_t last_temp_raw = 0;
+uint32_t last_pressure_raw = 0;
+uint32_t last_humidity_raw = 0;
+int32_t last_temp2_raw = 0;
+uint32_t last_pressure2_raw = 0;
+uint32_t last_humidity2_raw = 0;
+
 void display_data(int32_t temp_raw, uint32_t pressure_raw, uint32_t humidity_raw,
 		int32_t temp2_raw, uint32_t pressure2_raw, uint32_t humidity2_raw)
 {
@@ -156,9 +217,9 @@ void display_data(int32_t temp_raw, uint32_t pressure_raw, uint32_t humidity_raw
 	TFT_print("Aussen", layout.aussenLeft, layout.aussenBaseline);
 
 	TFT_setFont(DEJAVU18_FONT, NULL);
-	tft_fg = TFT_RED;
+	tft_fg = temp_color(temp_raw);
 	TFT_print(temp_str, layout.innenLeft, layout.tempBaseline);
-	tft_fg = TFT_YELLOW;
+	tft_fg = temp_color(temp2_raw);
 	TFT_print(temp2_str, layout.aussenLeft, layout.tempBaseline);
 	tft_fg = TFT_WHITE;
 	TFT_print(" C", layout.unitLeft, layout.tempBaseline);