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M ain Frequency using AT Commands #20

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M ain Frequency using AT Commands #20

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3591f39
Main Frequency (S16) Variable.
HefnySco Jul 23, 2014
31ddba0
remove bak files
HefnySco Jul 23, 2014
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12 changes: 11 additions & 1 deletion Firmware/radio/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -114,7 +114,17 @@ main(void)
feature_opportunistic_resend = param_get(PARAM_OPPRESEND)?true:false;
feature_golay = param_get(PARAM_ECC)?true:false;
feature_rtscts = param_get(PARAM_RTSCTS)?true:false;

g_board_frequency= param_get(PARAM_MAIN_FREQUENCY);
switch (g_board_frequency)
{
case FREQ_433:
case FREQ_470:
case FREQ_868:
case FREQ_915:
break;
default:
g_board_frequency = FREQ_433;
}
// Do hardware initialisation.
hardware_init();

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5 changes: 3 additions & 2 deletions Firmware/radio/parameters.c
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Expand Up @@ -39,7 +39,7 @@
/// with an 8-bit XOR checksum appended to the end of the flash range.
///


#include "board_info.h"
#include "radio.h"
#include "tdm.h"
#include <flash_layout.h>
Expand All @@ -65,7 +65,8 @@ __code const struct parameter_info {
{"LBT_RSSI", 0},
{"MANCHESTER", 0},
{"RTSCTS", 0},
{"MAX_WINDOW", 131}
{"MAX_WINDOW", 131},
{"Main_FREQ", FREQ_433}
};

/// In-RAM parameter store.
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2 changes: 2 additions & 0 deletions Firmware/radio/parameters.h
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Expand Up @@ -62,6 +62,8 @@ enum ParamID {
PARAM_MANCHESTER, // enable manchester encoding
PARAM_RTSCTS, // enable hardware flow control
PARAM_MAX_WINDOW, // The maximum window size allowed
PARAM_MAIN_FREQUENCY, // Main Frquenct FREQ_433 FREQ_470 FREQ_868 FREQ_915 FREQ_NONE

PARAM_MAX // must be last
};

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31 changes: 31 additions & 0 deletions README.markdown
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@@ -1,5 +1,36 @@
# SiK - Firmware for SiLabs Si1000 ISM radios

=====================================================
Change Main Frequency Feature:
I added parameter #16 where you can change the frequency of Telemetry using AT commands only. No need to upgrade Firmware.

Please make sure to use proper Antenna for the selected frequency.


The AT commands of the Telemetry can be found here http://copter.ardupilot.com/wiki/common-using-the-3dr-radio-for-telemetry-with-apm-and-px4/
The new commands is #16 called "Main_Freq".

Values that should be set there are:


FREQ_433 = 0x43,
FREQ_470 = 0x47,
FREQ_868 = 0x86,
FREQ_915 = 0x91,

i.e. ATS16=145 sets frequency to 915 MHz.


Typical steps to change frequency are:
+++ to enter AT commands mode.
ATS16=67 to change to 433 MHz
AT&W to save settings
ATZ to reboot (Mandatory)

=====================================================



For user documentation please see this site:

http://code.google.com/p/ardupilot-mega/wiki/3DRadio
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