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drivers: modem: hl7800 Add Site Survey

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Add API to determine nearby cell towers and their signal
strength.

Signed-off-by: Ryan Erickson <ryan.erickson@lairdconnect.com>
This commit is contained in:
Ryan Erickson 2021-09-01 08:24:31 -05:00 • committed by Anas Nashif
commit ef322d9e16
2 changed files with 105 additions and 1 deletions
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85
drivers/modem/hl7800.c
View file

@ -1220,6 +1220,22 @@ error:
#endif /* CONFIG_MODEM_HL7800_POLTE */
/**
* @brief Perform a site survey.
*
*/
int32_t mdm_hl7800_perform_site_survey(void)
{
int ret;
hl7800_lock();
wakeup_hl7800();
ret = send_at_cmd(NULL, "at%meas=\"97\"", MDM_CMD_SEND_TIMEOUT, 0, false);
allow_sleep(true);
hl7800_unlock();
return ret;
}
void mdm_hl7800_generate_status_events(void)
{
hl7800_lock();
@ -3045,6 +3061,74 @@ done:
return true;
}
/* There can be multiple responses from a single command.
* %MEAS: EARFCN=5826, CellID=420, RSRP=-99, RSRQ=-15
* %MEAS: EARFCN=6400, CellID=201, RSRP=-93, RSRQ=-21
*/
static bool on_cmd_survey_status(struct net_buf **buf, uint16_t len)
{
struct net_buf *frag = NULL;
char response[sizeof("EARFCN=XXXXXXXXXXX, CellID=XXXXXXXXXXX, RSRP=-XXX, RSRQ=-XXX")];
char *key;
size_t out_len;
char *value;
struct mdm_hl7800_site_survey site_survey;
wait_for_modem_data_and_newline(buf, net_buf_frags_len(*buf),
sizeof(response));
frag = NULL;
len = net_buf_findcrlf(*buf, &frag);
if (!frag) {
LOG_ERR("Unable to find end");
goto done;
}
out_len = net_buf_linearize(response, sizeof(response), *buf, 0, len);
LOG_HEXDUMP_DBG(response, out_len, "Site Survey");
key = "EARFCN=";
value = strstr(response, key);
if (value == NULL) {
goto done;
} else {
value += strlen(key);
site_survey.earfcn = strtoul(value, NULL, 10);
}
key = "CellID=";
value = strstr(response, key);
if (value == NULL) {
goto done;
} else {
value += strlen(key);
site_survey.cell_id = strtoul(value, NULL, 10);
}
key = "RSRP=";
value = strstr(response, key);
if (value == NULL) {
goto done;
} else {
value += strlen(key);
site_survey.rsrp = strtol(value, NULL, 10);
}
key = "RSRQ=";
value = strstr(response, key);
if (value == NULL) {
goto done;
} else {
value += strlen(key);
site_survey.rsrq = strtol(value, NULL, 10);
}
event_handler(HL7800_EVENT_SITE_SURVEY, &site_survey);
done:
return true;
}
#ifdef CONFIG_NEWLIB_LIBC
/* Handler: +CCLK: "yy/MM/dd,hh:mm:ss±zz" */
static bool on_cmd_rtc_query(struct net_buf **buf, uint16_t len)
@ -4012,6 +4096,7 @@ static void hl7800_rx(void)
CMD_HANDLER("+KCARRIERCFG: ", operator_index_query),
CMD_HANDLER("AT+CIMI", atcmdinfo_imsi),
CMD_HANDLER("+CFUN: ", modem_functionality),
CMD_HANDLER("%MEAS: ", survey_status),
#ifdef CONFIG_NEWLIB_LIBC
CMD_HANDLER("+CCLK: ", rtc_query),
#endif