From f6e7d4fd15bc1adb538d4b4f053a7ac43f8bb2fe Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Fri, 6 Mar 2020 21:55:30 +0100
Subject: ws2812b_uart: monitor VCC

---
 src/app/ws2812b_uart/main.cc | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/app')

diff --git a/src/app/ws2812b_uart/main.cc b/src/app/ws2812b_uart/main.cc
index b35800a..791e67a 100644
--- a/src/app/ws2812b_uart/main.cc
+++ b/src/app/ws2812b_uart/main.cc
@@ -226,6 +226,17 @@ int main(void)
 				target_mode = blinkencat.COLOR_RGB;
 			}
 		}
+		if (ADCSRA & _BV(ADIF)) {
+			uint8_t adcr_l = ADCL;
+			uint8_t adcr_h = ADCH;
+			uint16_t adcr = adcr_l + (adcr_h << 8);
+			uint16_t vcc = 1100L * 1023 / adcr;
+
+			TIFR1 |= _BV(TOV1);
+			ADCSRA |= _BV(ADIF);
+
+			kout << "VCC = " << vcc << endl;
+		}
 	}
 
 	return 0;
-- 
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