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Merge pull request #2982 from NaterGator/param-hash

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Enable hash generation of parameters block
This commit is contained in:
Lorenz Meier
2015-10-14 00:16:07 +02:00
parent a11ea87446 8a4699c656
commit f34ba165a4
3 changed files with 55 additions and 7 deletions
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src/modules/mavlink/mavlink_parameters.cpp
+23 -7
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@@ -44,6 +44,8 @@
#include "mavlink_parameters.h"
#include "mavlink_main.h"
#define HASH_PARAM "_HASH_CHECK"
MavlinkParametersManager::MavlinkParametersManager(Mavlink *mavlink) : MavlinkStream(mavlink),
_send_all_index(-1),
_rc_param_map_pub(nullptr),
@@ -121,13 +123,27 @@ MavlinkParametersManager::handle_message(const mavlink_message_t *msg)
/* when no index is given, loop through string ids and compare them */
if (req_read.param_index < 0) {
/* local name buffer to enforce null-terminated string */
char name[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN + 1];
strncpy(name, req_read.param_id, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN);
/* enforce null termination */
name[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN] = '\0';
/* attempt to find parameter and send it */
send_param(param_find_no_notification(name));
if (strncmp(req_read.param_id, HASH_PARAM, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN) == 0) {
/* return hash check for cached params */
uint32_t hash = param_hash_check();
/* build the one-off response message */
mavlink_param_value_t msg;
msg.param_count = param_count_used();
msg.param_index = -1;
strncpy(msg.param_id, HASH_PARAM, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN);
msg.param_type = MAV_PARAM_TYPE_UINT32;
memcpy(&msg.param_value, &hash, sizeof(hash));
_mavlink->send_message(MAVLINK_MSG_ID_PARAM_VALUE, &msg);
} else {
/* local name buffer to enforce null-terminated string */
char name[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN + 1];
strncpy(name, req_read.param_id, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN);
/* enforce null termination */
name[MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN] = '\0';
/* attempt to find parameter and send it */
send_param(param_find_no_notification(name));
}
} else {
/* when index is >= 0, send this parameter again */