Hi, I think I'm experiencing problem in LogWrite. When I try
LogWrite.append, when it signals appendDone, the error_t result is always
FAIL. Can anybody point out the possible reasons for a failure in appendDone
event?
Here is my source code. When I run it (with the mote connected to the
programming board), I get printout like the following:
"Sensed data 31,writing to log..not busy, so we can write..appending
log..append failed, buf is original, len=0,err=FAIL"
#include "Log.h"
#include "printf.h"
module MyLogWriteP {
uses {
interface Boot;
interface Leds;
interface LogWrite;
interface Timer<TMilli>;
interface Read<uint16_t>;
}
}
implementation {
enum {
SENSE_INTERVAL = 2000
};
typedef nx_struct logentry_t {
nx_uint16_t data;
} logentry_t;
bool m_busy = FALSE;
logentry_t m_entry;
event void Boot.booted() {
call Timer.startPeriodic(SENSE_INTERVAL);
}
event void Timer.fired() {
call Leds.led0On();//start sensing
call Read.read();
}
event void Read.readDone(error_t result,uint16_t data) {
call Leds.led0Off();//end sensing
if (result==SUCCESS) {
printf("Sensed data %d,writing to log..",data);
m_entry.data=data;
if (!m_busy) {
m_busy=TRUE;
printf("not busy, so we can write..");
call Leds.led1On();//start logging
if (call LogWrite.append(&m_entry,sizeof(m_entry))!=SUCCESS) {
m_busy=FALSE;
printf("Failed to initiate append log\n");
call Leds.led1Off();//log failure
}
else {
printf("appending log..");
}
}
else {
printf("busy, so this data is abandoned\n");
}
}
}
event void LogWrite.eraseDone(error_t err) {
printf("Errase Done\n");
}
event void LogWrite.appendDone(void* buf, storage_len_t len,
bool recordsLost, error_t err) {
if (err==SUCCESS) {
printf("append success!\n");
call Leds.led2Toggle();
}
else {
printf("append failed, ");
printf("buf %s original, ",buf==&m_entry?"is":"is not");
printf("len=%d,",len);
if(err==ESIZE)
printf("err=ESIZE\n");
if(err==FAIL)
printf("err=FAIL\n");
else
printf("err unknown\n");
}
call Leds.led1Off();
m_busy=FALSE;
}
event void LogWrite.syncDone(error_t err) {
printf("Does anything happen here?\n");
}
}
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