static void send_selected_rom(void)
{
#if ONLY_1_DEVICE_ON_THE_BUS == 1
ow_read_rom(ds18x20_rom_code);
ow_command(OW_SKIP_ROM);
#elif ONLY_1_DEVICE_ON_THE_BUS == 0
unsigned char x=0;
ow_command(OW_MATCH_ROM);
for(x=0; x<8; x++) { ow_put_byte(ds18x20_rom_code[x]); }
#endif
return;
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(ds18b20_poll_process, ev, data)
{
static struct etimer et;
static uint8_t scratchpad[DS18B20_SCRATCHPAD_SIZE];
static ow_rom_code_t id;
PROCESS_BEGIN();
printf("\nDS18B20 test\n");
printf("VSEC ON\n");
power_control_vsec_set(1);
/* initialize the DS18B20 hardware */
printf("Initialize 1-wire\n");
ow_init();
printf("1-wire READ ROM\n");
id = ow_read_rom();
printf("Initialize DS18B20\n");
ds18b20_init();
printf("DS18B20 init done\n");
/* Poll at 1Hz */
etimer_set(&et, CLOCK_SECOND);
while(1) {
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
/* Reset the etimer to trig again */
etimer_reset(&et);
ds18b20_read_scratchpad(id, scratchpad);
ds18b20_convert_temperature(id);
}
PROCESS_END();
}
u8 ow_task()
{
u8 payload_len, code;
if (mailbox_head(&ow_taskinfo.mailbox, &code, &payload_len))
{
switch(code)
{
case ONEWIRE_CMD_RESET:
{
u8 rombuf[8];
u8 result;
if (payload_len == 1)
{
u8 flags = disable_interrupts();
result = ow_read_rom(rombuf);
restore_flags(flags);
}
else
{
result = ow_read_rom(rombuf);
}
if (result)
{
send_msg(BROADCAST_NODE_ID, TASK_ID_ONEWIRE<<4|ONEWIRE_CMD_RESET,
1, &result, 0);
}
else
{
send_msg(BROADCAST_NODE_ID, TASK_ID_ONEWIRE<<4|ONEWIRE_CMD_RESET,
8, rombuf, 0);
}
}
break;
case ONEWIRE_READ_2760:
{
u8 buf[15];
u8 buflen;
u8 result;
if (payload_len == 2)
{
mailbox_copy_payload(&ow_taskinfo.mailbox, buf, 2, 0);
buflen=buf[1];
result = ow_2760_read_reg(buf[0], buf, buflen);
}
else
{
result = 0xEE;
}
if (result)
{
send_msg(BROADCAST_NODE_ID, TASK_ID_ONEWIRE<<4|ONEWIRE_READ_2760,
1, &result, 0);
}
else
{
send_msg(BROADCAST_NODE_ID, TASK_ID_ONEWIRE<<4|ONEWIRE_READ_2760,
buflen, buf, 0);
}
}
break;
case ONEWIRE_WRITE_2760:
{
u8 buf[2];
u8 result;
if (payload_len == 2)
{
mailbox_copy_payload(&ow_taskinfo.mailbox, buf, 2, 0);
result = ow_2760_write_reg(buf[0], buf[1]);
}
else if (payload_len == 3)
{
u8 flag = disable_interrupts();
mailbox_copy_payload(&ow_taskinfo.mailbox, buf, 2, 0);
result = ow_2760_write_reg(buf[0], buf[1]);
restore_flags(flag);
}
else
{
result = 0xEE;
}
send_msg(BROADCAST_NODE_ID, TASK_ID_ONEWIRE<<4|ONEWIRE_WRITE_2760,
1, &result, 0);
}
break;
case ONEWIRE_RECALL_2760:
{
u8 buf[1];
u8 result;
if (payload_len == 1)
{
mailbox_copy_payload(&ow_taskinfo.mailbox, buf, 1, 0);
result = ow_2760_recall_data(buf[0]);
}
else
{
result = 0xEE;
}
send_msg(BROADCAST_NODE_ID, TASK_ID_ONEWIRE<<4|ONEWIRE_RECALL_2760,
1, &result, 0);
}
break;
case ONEWIRE_COPY_2760:
{
u8 buf[1];
u8 result;
if (payload_len == 1)
{
mailbox_copy_payload(&ow_taskinfo.mailbox, buf, 1, 0);
result = ow_2760_copy_data(buf[0]);
}
else
{
result = 0xEE;
}
send_msg(BROADCAST_NODE_ID, TASK_ID_ONEWIRE<<4|ONEWIRE_COPY_2760,
1, &result, 0);
}
break;
}
mailbox_advance(&ow_taskinfo.mailbox);
}
return 0;
}
