uint8_t ow_search_devices(OW_device *devices, uint8_t num_devices, uint8_t pin, uint8_t *num) {
uint8_t i, j;
uint8_t *new_id;
uint8_t *current_id;
uint8_t last_deviation;
uint8_t num_found_devices;
uint8_t flag = SEARCH_SUCCESSFUL;
for(i = 0; i < num_devices; i++) {
for(j = 0; j < 8; j++) {
devices[i].id[j] = 0x00;
}
}
num_found_devices = 0;
new_id = devices[0].id;
last_deviation = 0;
current_id = new_id;
do {
memcpy(new_id, current_id, 8);
if(!ow_detect_presence(pin)) {
return SEARCH_ERROR;
};
last_deviation = ow_search_rom(new_id, last_deviation, pin);
current_id = new_id;
num_found_devices++;
new_id = devices[num_found_devices].id;
} while(last_deviation != OW_ROM_SEARCH_FINISHED);
for(i = 0; i < num_found_devices; i++) {
if(ow_check_rom_crc(devices[i].id) != OW_CRC_OK) {
flag = SEARCH_CRC_ERROR;
} else {
(*num)++;
}
}
return flag;
}
static int8_t ow_discover_sensor(void) {
uint8_t firstonbus = 1;
int8_t ret = 0;
#if ONEWIRE_BUSCOUNT > 1
ow_global.bus = 0;
#endif /* ONEWIRE_BUSCOUNT */
#ifdef DEBUG_OW_POLLING
debug_printf("starting discovery\n");
#endif /* DEBUG_OW_POLLING */
/*Prepare existing sensors*/
for (uint8_t i = 0; i < OW_SENSORS_COUNT; i++)
ow_sensors[i].present = 0;
#if ONEWIRE_BUSCOUNT > 1
do {
#endif /* ONEWIRE_BUSCOUNT > 1 */
do {
ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
#if ONEWIRE_BUSCOUNT > 1
ret = ow_search_rom((uint8_t)(1 << (ow_global.bus + ONEWIRE_STARTPIN)), firstonbus);
#else /* ONEWIRE_BUSCOUNT > 1 */
ret = ow_search_rom(ONEWIRE_BUSMASK, firstonbus);
#endif /* ONEWIRE_BUSCOUNT > 1 */
}
/* make sure only one conversion happens at a time */
ow_global.lock = 1;
if (ret == 1) {
firstonbus = 0;
#ifdef DEBUG_OW_POLLING
debug_printf("discovered device %02x %02x %02x %02x %02x %02x %02x %02x"
#if ONEWIRE_BUSCOUNT > 1
" on bus %d"
#endif /* ONEWIRE_BUSCOUNT > 1 */
"\n",
ow_global.current_rom.bytewise[0],
ow_global.current_rom.bytewise[1],
ow_global.current_rom.bytewise[2],
ow_global.current_rom.bytewise[3],
ow_global.current_rom.bytewise[4],
ow_global.current_rom.bytewise[5],
ow_global.current_rom.bytewise[6],
ow_global.current_rom.bytewise[7]
#if ONEWIRE_BUSCOUNT > 1
,ow_global.bus
#endif /* ONEWIRE_BUSCOUNT > 1 */
);
#endif /* DEBUG_OW_POLLING */
if (ow_temp_sensor(&ow_global.current_rom)) {
uint8_t already_in = 0;
/*Determine whether this sensor is already present in our list*/
for (uint8_t i = 0; i < OW_SENSORS_COUNT; i++) {
if (ow_global.current_rom.raw == ow_sensors[i].ow_rom_code.raw) {
ow_sensors[i].present = 1;
already_in = 1;
/*We skip everything else to retain a regular update rate*/
break;
}
}
if (already_in == 0) {
uint8_t i;
/*The sensor we found is not in our list, so we search for the first free sensor slot, e.g. the first slot where ow_rom_code is zero*/
for (i = 0; i < OW_SENSORS_COUNT; i++) {
if (ow_sensors[i].ow_rom_code.raw == 0) {
/* We found a free slot...storing*/
#ifdef DEBUG_OW_POLLING
debug_printf("stored new sensor in pos %d\n", i);
#endif /* DEBUG_OW_POLLING */
ow_sensors[i].ow_rom_code.raw = ow_global.current_rom.raw;
ow_sensors[i].present = 1;
ow_sensors[i].read_delay = 1; /*Read temperature asap - note: we will check for eeprom later*/
break;
}
}
#ifdef DEBUG_OW_POLLING
if (i == OW_SENSORS_COUNT - 1)
debug_printf("number of sensors exceeds list size of %d\n", OW_SENSORS_COUNT);
#endif /* DEBUG_OW_POLLING */
}
#ifdef DEBUG_OW_POLLING
} else {
debug_printf("not a temperature sensor\n");
#endif /* DEBUG_OW_POLLING */
}
}
} while (ret > 0);
#if ONEWIRE_BUSCOUNT > 1
ow_global.bus++;
firstonbus = 1;
} while (ow_global.bus < ONEWIRE_BUSCOUNT);
#endif /* ONEWIRE_BUSCOUNT > 1 */
ow_global.lock = 0;
/*We finished the discovery process. Now we delete all removed sensors*/
for (uint8_t i = 0; i < OW_SENSORS_COUNT; i++) {
/*Mark the slot as free*/
if (ow_sensors[i].present == 0)
ow_sensors[i].ow_rom_code.raw = 0;
}
return 0;
}
int16_t
parse_cmd_onewire_list(char *cmd, char *output, uint16_t len)
{
uint8_t firstonbus = 0;
int16_t ret;
if (ow_global.lock == 0)
{
firstonbus = 1;
#if ONEWIRE_BUSCOUNT > 1
ow_global.bus = 0;
#endif
OW_DEBUG_LIST("called onewire list for the first time\n");
#ifdef ONEWIRE_DS2502_SUPPORT
/* parse optional parameters */
while (*cmd == ' ')
cmd++;
switch (*cmd)
{
case 't':
ow_global.list_type = OW_LIST_TYPE_TEMP_SENSOR;
break;
case 'e':
ow_global.list_type = OW_LIST_TYPE_EEPROM;
break;
case '\0':
ow_global.list_type = OW_LIST_TYPE_ALL;
break;
default:
return ECMD_ERR_PARSE_ERROR;
}
#endif
}
else
{
OW_DEBUG_LIST("called onewire list again\n");
firstonbus = 0;
}
#if defined ONEWIRE_DS2502_SUPPORT || ONEWIRE_BUSCOUNT > 1
list_next:;
#endif
#if ONEWIRE_BUSCOUNT > 1
ret =
ow_search_rom((uint8_t) (1 << (ow_global.bus + ONEWIRE_STARTPIN)),
firstonbus);
#else
ret = ow_search_rom(ONEWIRE_BUSMASK, firstonbus);
#endif
/* make sure only one conversion happens at a time */
ow_global.lock = 1;
if (ret == 1)
{
#ifdef ONEWIRE_DS2502_SUPPORT
if (ow_global.list_type == OW_LIST_TYPE_ALL ||
(ow_global.list_type == OW_LIST_TYPE_TEMP_SENSOR &&
ow_temp_sensor(&ow_global.current_rom)) ||
(ow_global.list_type == OW_LIST_TYPE_EEPROM &&
ow_eeprom(&ow_global.current_rom)))
{
/* only print device rom address if it matches the selected list type */
#endif
OW_DEBUG_LIST("discovered device "
#if ONEWIRE_BUSCOUNT > 1
"%02x %02x %02x %02x %02x %02x %02x %02x on bus %d\n",
#else
"%02x %02x %02x %02x %02x %02x %02x %02x\n",
#endif
ow_global.current_rom.bytewise[0],
ow_global.current_rom.bytewise[1],
ow_global.current_rom.bytewise[2],
ow_global.current_rom.bytewise[3],
ow_global.current_rom.bytewise[4],
ow_global.current_rom.bytewise[5],
ow_global.current_rom.bytewise[6],
ow_global.current_rom.bytewise[7]
#if ONEWIRE_BUSCOUNT > 1
, ow_global.bus);
#else
);
#endif
#ifdef ONEWIRE_NAMING_SUPPORT
char *name = "";
ow_sensor_t *sensor = ow_find_sensor(&ow_global.current_rom);
if (sensor != NULL && sensor->named)
{
name = sensor->name;
}
#endif
ret = snprintf_P(output, len, PSTR("%02x%02x%02x%02x%02x%02x%02x%02x"
#ifdef ONEWIRE_NAMING_SUPPORT
"\t%s"
#endif
),
ow_global.current_rom.bytewise[0],
ow_global.current_rom.bytewise[1],
ow_global.current_rom.bytewise[2],
ow_global.current_rom.bytewise[3],
ow_global.current_rom.bytewise[4],
ow_global.current_rom.bytewise[5],
ow_global.current_rom.bytewise[6],
ow_global.current_rom.bytewise[7]
#ifdef ONEWIRE_NAMING_SUPPORT
, name
#endif
);
OW_DEBUG_LIST("generated %d bytes\n", ret);
/* set return value that the parser has to be called again */
if (ret > 0)
ret = ECMD_AGAIN(ret);
OW_DEBUG_LIST("returning %d\n", ret);
return ECMD_FINAL(ret);
#ifdef ONEWIRE_DS2502_SUPPORT
}
