From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Wed, 29 Aug 2012 10:46:24 +0000 (+0200)
Subject: log reset reason
X-Git-Tag: gedasymbols-20120913~43
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=bike-lights.git;a=commitdiff_plain;h=7306399bcbd0d7e86899476e4e7d91793825afa6

log reset reason
---

diff --git a/logging.c b/logging.c
index 5c5beeb..0ade201 100644
--- a/logging.c
+++ b/logging.c
@@ -10,6 +10,7 @@ static unsigned char log_buffer_ee[LOG_BUFFER] EEMEM;
 static unsigned char log_buffer_count;
 static unsigned char log_buffer[LOG_BUFFER];
 static unsigned char log_state EEMEM;
+/* Upper 4 bits are reset count, lower 4 bits are reset reason from MCUSR */
 static unsigned char reboot_count EEMEM = 0;
 static unsigned char can_write_eeprom = 0;
 
@@ -24,10 +25,13 @@ void log_init()
 	unsigned char r_count;
 
 	r_count = eeprom_read_byte(&reboot_count);
+	r_count >>= 4;
 
 	if (r_count < 5) {
 		r_count++;
-		eeprom_write_byte(&reboot_count, r_count);
+		eeprom_write_byte(&reboot_count,
+			(r_count << 4) | (MCUSR & 0xF));
+		MCUSR = 0;
 		can_write_eeprom = 1;
 	} else {
 		//eeprom_write_byte(&log_state, 0xFF);