persistentCounter.c etc.: made the persistent counter more versatile, it
is not limited to hard reset counts anymore
This commit is contained in:
Christian Kroll
parent
967ab9a05e
commit
7d0022a22d
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@ -94,7 +94,8 @@ void display_loop(){
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#ifdef RANDOM_SUPPORT
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{
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char a[28];
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sprintf(a,"</# counter == %lu ", (unsigned long) percnt_get());
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sprintf(a,"</# counter == %lu ",
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(unsigned long)percnt_get(&g_reset_counter, &g_reset_counter_idx));
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scrolltext(a);
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}
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#endif
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@ -32,8 +32,8 @@ int main (void){
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clear_screen(0);
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#ifdef RANDOM_SUPPORT
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srandom32(percnt_get());
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percnt_inc();
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srandom32(percnt_get(&g_reset_counter, &g_reset_counter_idx));
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percnt_inc(&g_reset_counter, &g_reset_counter_idx);
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#endif
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#ifdef RFM12_SUPPORT
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@ -9,103 +9,105 @@
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#include "../compat/interrupt.h" /* cli() & sei() */
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#include "../compat/eeprom.h"
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#include "../config.h"
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#include "persistentCounter.h"
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#ifdef ERROR_HANDLING
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#include "error-handling.h"
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#define PERSISTENT_COUNTER_OVERFLOW (void*)0, 2,4,1
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#define PERSISTENT_COUNTER_WRITER_ERROR (void*)0, 2,4,2
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# include "error-handling.h"
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# define PERSISTENT_COUNTER_OVERFLOW (void*)0, 2,4,1
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# define PERSISTENT_COUNTER_WRITER_ERROR (void*)0, 2,4,2
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#endif
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#define RING_SIZE 168
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uint8_t ring_idx = 0xff;
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uint16_t EEMEM B08_23;
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uint8_t EEMEM B0_7[RING_SIZE];
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uint8_t g_reset_counter_idx = 0xff;
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percnt_t EEMEM g_reset_counter;
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#ifdef INIT_EEPROM
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void init_buffer(void){
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void init_buffer(percnt_t *percnt, uint8_t *ring_index) {
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uint8_t i;
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eeprom_busy_wait();
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eeprom_write_word(&B08_23, 0x0000);
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for(i=0; i<RING_SIZE; ++i){
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eeprom_write_word(&(percnt->B08_23), 0x0000);
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for (i = 0; i < RING_SIZE; ++i) {
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eeprom_busy_wait();
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eeprom_write_byte(&(B0_7[i]), 0x00);
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eeprom_write_byte(&(percnt->B0_7[i]), 0x00);
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}
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}
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#endif
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void percnt_init(void){
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void percnt_init(percnt_t *percnt, uint8_t *ring_index) {
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uint8_t i;
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uint8_t maxidx=0;
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uint8_t t,max=eeprom_read_byte(&(B0_7[0]));
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#ifdef INIT_EEPROM
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if (eeprom_read_word(&B08_23)==0xFFFF){ /* test if the 2 MSB == 0xFFFF*/
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if (eeprom_read_word((uint16_t*)&(B0_7[0]))==0xFFFF) /* test the first to bytes of ringbuffer*/
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init_buffer();
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}
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#endif
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for(i=0; i<RING_SIZE; ++i){ /* this might be speed up, but such optimisation could lead to timing attacks */
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uint8_t maxidx = 0;
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uint8_t t, max = eeprom_read_byte(&(percnt->B0_7[0]));
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#ifdef INIT_EEPROM
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/* test if the 2 MSB == 0xFFFF */
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if (eeprom_read_word(&(percnt->B08_23)) == 0xFFFF) {
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/* test the first two bytes of ringbuffer */
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if (eeprom_read_word((uint16_t*) &(percnt->B0_7[0])) == 0xFFFF)
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init_buffer(percnt, ring_index);
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}
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#endif
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/* might be faster, but such optimizations are prone to timing attacks */
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for (i = 0; i < RING_SIZE; ++i) {
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eeprom_busy_wait();
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t=eeprom_read_byte(&(B0_7[i]));
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if(t==max+1){
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max=t;
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maxidx=i;
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t = eeprom_read_byte(&(percnt->B0_7[i]));
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if (t == max + 1) {
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max = t;
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maxidx = i;
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}
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}
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ring_idx = (maxidx==RING_SIZE)?0:maxidx;
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*ring_index = (maxidx == RING_SIZE) ? 0 : maxidx;
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}
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uint32_t percnt_get(void){
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uint32_t ret=0;
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uint32_t percnt_get(percnt_t *percnt, uint8_t *ring_index) {
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uint32_t ret = 0;
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if(ring_idx==0xff)
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percnt_init();
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if (*ring_index == 0xff)
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percnt_init(percnt, ring_index);
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cli();
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eeprom_busy_wait();
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ret=eeprom_read_word(&B08_23)<<8;
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ret = eeprom_read_word(&(percnt->B08_23)) << 8;
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eeprom_busy_wait();
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ret |= eeprom_read_byte(&(B0_7[ring_idx]));
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ret |= eeprom_read_byte(&(percnt->B0_7[*ring_index]));
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sei();
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return ret;
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}
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void percnt_inc(void){
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void percnt_inc(percnt_t *percnt, uint8_t *ring_index) {
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/* we must make this resistant agaist power off while this is running ... */
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uint32_t u;
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if(ring_idx==0xff)
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percnt_init();
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u = percnt_get();
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if (*ring_index == 0xff)
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percnt_init(percnt, ring_index);
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u = percnt_get(percnt, ring_index);
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cli();
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/* it's important to write msb first! */
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if((u&0x000000ff) == 0xff){
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if((u&0x0000ffff) == 0xffff){
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if((u&0x00ffffff) == 0xffffff){
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if ((u & 0x000000ff) == 0xff) {
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if ((u & 0x0000ffff) == 0xffff) {
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if ((u & 0x00ffffff) == 0xffffff) {
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/* we can turn the lights off now. it's time to die */
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#ifdef ERROR_HANDLING
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#ifdef ERROR_HANDLING
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error(PERSISTENT_COUNTER_OVERFLOW);
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#endif
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#endif
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}
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eeprom_busy_wait();
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eeprom_write_byte(&(((uint8_t*)&B08_23)[1]),((u+1)>>16)&0xff);
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eeprom_write_byte(&(((uint8_t*) &(percnt->B08_23))[1]),
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((u + 1) >> 16) & 0xff);
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}
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eeprom_busy_wait();
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eeprom_write_byte(&(((uint8_t*)&B08_23)[0]),((u+1)>>8)&0xff);
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eeprom_write_byte(&(((uint8_t*) &(percnt->B08_23))[0]),
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((u + 1) >> 8) & 0xff);
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}
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/* set least significant byte (in ringbuffer) */
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ring_idx = (ring_idx+1)%RING_SIZE;
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*ring_index = (*ring_index + 1) % RING_SIZE;
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eeprom_busy_wait();
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eeprom_write_byte(&(B0_7[ring_idx]),(u+1)&0xff);
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eeprom_write_byte(&(percnt->B0_7[*ring_index]), (u + 1) & 0xff);
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eeprom_busy_wait();
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if(u+1 != percnt_get()){
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#ifdef ERROR_HANDLING
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if (u + 1 != percnt_get(percnt, ring_index)) {
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#ifdef ERROR_HANDLING
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error(PERSISTENT_COUNTER_WRITER_ERROR);
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#endif
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#endif
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}
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sei();
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}
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@ -9,15 +9,22 @@
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#ifndef PERSISTENTCOUNTER_H_
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#define PERSISTENTCOUNTER_H_
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#include <stdint.h>
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#include "../compat/eeprom.h"
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#define PERSISTENT_COUNTER_BITS 24
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#define RING_SIZE 168
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void percnt_init(void);
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uint32_t percnt_get(void);
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void percnt_inc(void);
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typedef struct percnt_s {
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uint16_t B08_23;
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uint8_t B0_7[RING_SIZE];
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} percnt_t;
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extern uint8_t g_reset_counter_idx;
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extern percnt_t g_reset_counter EEMEM;
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void percnt_init(percnt_t *percnt, uint8_t *ring_index);
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uint32_t percnt_get(percnt_t *percnt, uint8_t *ring_index);
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void percnt_inc(percnt_t *percnt, uint8_t *ring_index);
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#endif /*PERSISTENTCOUNTER_H_*/
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@ -227,7 +227,7 @@ static void uartcmd_read_mode(void) {
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/**
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* Perform a MCU reset by triggering the watchdog.
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*/
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static void uartcmd_reset_borg() {
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static void uartcmd_reset_borg(void) {
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timer0_off();
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}
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