From: Keith Packard <keithp@keithp.com>
Date: Sat, 7 Jun 2014 17:54:14 +0000 (-0700)
Subject: altos: Clear out eeprom erase records when writing entry 0
X-Git-Tag: 1.3.2.3~14
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=5d973570ef2324b21a64477eecb0a292652ff467;ds=sidebyside

altos: Clear out eeprom erase records when writing entry 0

When writing config/erase to eeprom, there's no 'erase' operation as
on-chip eeprom is writable at a byte level. As such, we can't tell
when the erase blocks get reset when the config gets written. When
this happens, erase block 0 gets written explicitly, so just use that
call to trigger explicit erasing of the data.

Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/src/kernel/ao_log.c b/src/kernel/ao_log.c
index 76e0e68c..3cf85a33 100644
--- a/src/kernel/ao_log.c
+++ b/src/kernel/ao_log.c
@@ -67,6 +67,18 @@ ao_log_write_erase(uint8_t pos)
 	erase.mark = LOG_ERASE_MARK;
 	erase.flight = ao_flight_number;
 	ao_config_write(ao_log_erase_pos(pos),  &erase, sizeof (erase));
+
+#if USE_EEPROM_CONFIG
+	if (pos == 0) {
+		uint8_t	i;
+		for (i = 1; i < LOG_MAX_ERASE; i++) {
+			erase.mark = ~LOG_ERASE_MARK;
+			erase.flight = 0;
+			ao_config_write(ao_log_erase_pos(i), &erase, sizeof (erase));
+		}
+	}
+#endif
+
 	ao_config_flush();
 }