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[Paparazzi-devel] Joystick question
From: |
Chris |
Subject: |
[Paparazzi-devel] Joystick question |
Date: |
Sun, 08 May 2011 08:44:40 +0300 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110424 Thunderbird/3.1.10 |
Hi.
I finally made everything work well with my Saitek Aviator and i also
made some changes
that aim in reducing modem bandwidth so i need to ask for your opinion
on those.
1) added a variable to the rc_datalink.h and .c files
("datalink_pprz_mode") that controls the autopilot's mode:
extern volatile int8_t datalink_pprz_mode;
#define NormalizeRcDl(_in, _out) { \
_out[RADIO_ROLL] = (MAX_PPRZ/128) * _in[RADIO_ROLL]; \
Bound(_out[RADIO_ROLL], MIN_PPRZ, MAX_PPRZ); \
_out[RADIO_PITCH] = (MAX_PPRZ/128) * _in[RADIO_PITCH]; \
Bound(_out[RADIO_PITCH], MIN_PPRZ, MAX_PPRZ); \
_out[RADIO_YAW] = (MAX_PPRZ/128) * _in[RADIO_YAW]; \
Bound(_out[RADIO_YAW], MIN_PPRZ, MAX_PPRZ); \
_out[RADIO_THROTTLE] = ((MAX_PPRZ/255)*(127+ _in[RADIO_THROTTLE])); \
Bound(_out[RADIO_THROTTLE], 0, MAX_PPRZ); \
_out[RADIO_MODE] = MAX_PPRZ * (datalink_pprz_mode - 1); \
Bound(_out[RADIO_MODE], MIN_PPRZ, MAX_PPRZ); \
}
2) The variable was added to the settings.xml file and the joystick .xml
file was configured to change the variable like this:
<message class="ground" name="DL_SETTING" on_event="stick_right_button">
<field name="index" value="IndexOfSetting(datalink_pprz_mode)"/>
<field name="value" value="2"/>
</message>
<message class="ground" name="DL_SETTING" on_event="stick_center_button">
<field name="index" value="IndexOfSetting(datalink_pprz_mode)"/>
<field name="value" value="1"/>
</message>
<message class="ground" name="DL_SETTING" on_event="stick_left_button">
<field name="index" value="IndexOfSetting(datalink_pprz_mode)"/>
<field name="value" value="0"/>
</message>
That way i don't need the "MODE" portion of the RC_4CH message so the
message length is now reduced by one byte and since that particular
message is repeated at a high rate this should reduce bandwidth usage,
am i correct or i dont gain anything by doing that?
Chris
- [Paparazzi-devel] Joystick question,
Chris <=