michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: modem: sara-r4: handle read limits

Browse source 
SARA-R4 has a max read limit of 512 when using binary hex formatting.
Otherwise the max read limit is 1024.

Signed-off-by: Michael Scott <mike@foundries.io>
This commit is contained in:
Michael Scott 2020-01-27 14:57:12 -08:00 • committed by Jukka Rissanen
commit 87481e8eef
1 changed files with 15 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

15
drivers/modem/ublox-sara-r4.c
View file

@ -1161,6 +1161,21 @@ static ssize_t offload_recvfrom(void *obj, void *buf, size_t len,
&mdata.socket_config, sock);
}
#if defined(CONFIG_MODEM_UBLOX_SARA_R4)
/* max length in hex mode is MDM_MAX_DATA_LENGTH / 2 */
if (next_packet_size > (MDM_MAX_DATA_LENGTH / 2)) {
next_packet_size = (MDM_MAX_DATA_LENGTH / 2);
}
#else
/*
* Binary and ASCII mode allows sending MDM_MAX_DATA_LENGTH bytes to
* the socket in one command
*/
if (next_packet_size > MDM_MAX_DATA_LENGTH) {
next_packet_size = MDM_MAX_DATA_LENGTH;
}
#endif
snprintk(sendbuf, sizeof(sendbuf), "AT+USO%s=%d,%d",
from ? "RF" : "RD", sock->id,
len < next_packet_size ? len : next_packet_size);