From 7d2f4ab4e669b0b0f484604016e93a25d3b9cf33 Mon Sep 17 00:00:00 2001 From: "Jan \"Yenya\" Kasprzak" Date: Tue, 28 Aug 2012 21:31:32 +0200 Subject: [PATCH] logging.c: don't wear out eeprom on frequent reboots --- logging.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/logging.c b/logging.c index 04f9515..5c5beeb 100644 --- a/logging.c +++ b/logging.c @@ -6,18 +6,34 @@ #include "lights.h" #define LOG_BUFFER 128 -static unsigned char log_state EEMEM; 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; +static unsigned char reboot_count EEMEM = 0; +static unsigned char can_write_eeprom = 0; void log_set_state(unsigned char val) { - eeprom_write_byte(&log_state, val); + if (can_write_eeprom) + eeprom_write_byte(&log_state, val); } void log_init() { + unsigned char r_count; + + r_count = eeprom_read_byte(&reboot_count); + + if (r_count < 5) { + r_count++; + eeprom_write_byte(&reboot_count, r_count); + can_write_eeprom = 1; + } else { + //eeprom_write_byte(&log_state, 0xFF); + can_write_eeprom = 0; + } + log_set_state(1); log_buffer_count = 0; } @@ -42,6 +58,10 @@ void log_flush() { unsigned char i; log_buffer_count = LOG_BUFFER; + + if (!can_write_eeprom) + return; + for (i=0; i < LOG_BUFFER; i++) { eeprom_write_byte(&log_buffer_ee[i], log_buffer[i]); -- 2.39.3