mirror of https://github.com/ArduPilot/ardupilot
ArduPPM: Redundancy mode
Base algorithm added for channel count auto detection in the decoder himself. Replaced the #define for PPM_CHx_CHANNELS by PPM_CHx_MAX_CHANNELS. Channel count #define was not needed anymore thanks to the channel count auto detection. Channel detection post processing to do.
This commit is contained in:
Olivier ADLER
parent
2936dbb9de
commit
3784f326e8
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@ -61,8 +61,8 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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// -------------------------------------------------------------
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#define SWITCHOVER_CHANNEL_A 9 // Receiver 1 PPM channel to force receiver 2. Use 0 for no switchover channel
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// Must be selected from 6 to 16. Preferabily from 9 to 16 so that APM can use
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// channels 1 or 8.
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// Must be choosed between 6 to 16. Preferabily from 9 to 16 so that APM can use
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// channels 1 to 8.
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#define SWITCHOVER_1_to_2_DELAY_MS 50 // Delay for switching to receiver 2
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@ -90,15 +90,15 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#ifdef PPM_CH1_STANDARD_EXTENDED
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// Number of input PPM channels
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#define PPM_CH1_CHANNELS 9
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// Max input PPM channels
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#define PPM_CH1_MAX_CHANNELS 9
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// Frame period
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#define PPM_CH1_FRAME_PERIOD 22100 // frame period (microseconds)
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#else
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// Number of input PPM channels
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#define PPM_CH1_CHANNELS 8
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// Max input PPM channels
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#define PPM_CH1_MAX_CHANNELS 8
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// Frame period
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#define PPM_CH1_FRAME_PERIOD 20000 // frame period (microseconds)
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@ -117,15 +117,15 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#define PPM_CH1_CHANNEL_PREPULSE_LENGHT 400
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// PPM frame sync symbol minimum and maximum laps
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#define PPM_CH1_MIN_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_CHANNELS * PPM_CH1_VAL_MAX ) // Sync symbol detection
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#define PPM_CH1_MAX_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_CHANNELS * PPM_CH1_VAL_MIN ) // Sync timeout
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#define PPM_CH1_MIN_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_MAX_CHANNELS * PPM_CH1_VAL_MAX ) // Sync symbol detection
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#define PPM_CH1_MAX_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_MAX_CHANNELS * PPM_CH1_VAL_MIN ) // Sync timeout
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#endif
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#ifdef PPM_CH1_V2 (PPMv2 is a 50 Hz 16 channels mode, used initialy on Futaba and later on other manufacturers modules)
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// Number of input PPM channels
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#define PPM_CH1_CHANNELS 16
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// Max input PPM channels
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#define PPM_CH1_MAX_CHANNELS 16
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// Frame period
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#define PPM_CH1_FRAME_PERIOD 20000 // frame period (microseconds)
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@ -142,15 +142,15 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#define PPM_CH1_CHANNEL_PREPULSE_LENGHT 200
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// PPM frame sync symbol minimum and maximum laps
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#define PPM_CH1_MIN_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_CHANNELS * PPM_CH1_VAL_MAX ) // Sync symbol detection
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#define PPM_CH1_MAX_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_CHANNELS * PPM_CH1_VAL_MIN ) // Sync timeout
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#define PPM_CH1_MIN_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_MAX_CHANNELS * PPM_CH1_VAL_MAX ) // Sync symbol detection
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#define PPM_CH1_MAX_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_MAX_CHANNELS * PPM_CH1_VAL_MIN ) // Sync timeout
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#endif
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#ifdef PPM_CH1_V3 (PPMv3 is a 40 Hz slower refresh frequency 16 channels mode to allow 16 channels with older transmitter modules)
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// Number of input PPM channels
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#define PPM_CH1_CHANNELS 16
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// Max input PPM channels
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#define PPM_CH1_MAX_CHANNELS 16
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// Frame period
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#define PPM_CH1_FRAME_PERIOD 25000 // frame period (microseconds)
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@ -167,8 +167,8 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#define PPM_CH1_CHANNEL_PREPULSE_LENGHT 400
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// PPM frame sync symbol minimum and maximum laps
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#define PPM_CH1_MIN_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_CHANNELS * PPM_CH1_VAL_MAX ) // Sync symbol detection
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#define PPM_CH1_MAX_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_CHANNELS * PPM_CH1_VAL_MIN ) // Sync timeout
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#define PPM_CH1_MIN_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_MAX_CHANNELS * PPM_CH1_VAL_MAX ) // Sync symbol detection
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#define PPM_CH1_MAX_SYNC_LENGHT PPM_CH1_FRAME_PERIOD - ( PPM_CH1_MAX_CHANNELS * PPM_CH1_VAL_MIN ) // Sync timeout
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#endif
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@ -178,14 +178,14 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#ifdef PPM_CH2_STANDARD_EXTENDED
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// Number of input PPM channels
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// Max input PPM channels
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#define PPM_CH2_CHANNELS 9
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// Frame period
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#define PPM_CH2_FRAME_PERIOD 22100 // frame period (microseconds)
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#else
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// Number of input PPM channels
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// Max input PPM channels
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#define PPM_CH2_CHANNELS 8
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// Frame period
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#define PPM_CH2_FRAME_PERIOD 20000 // frame period (microseconds)
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@ -199,7 +199,6 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#define PPM_CH2_VAL_MIN TICKS_FOR_ONE_US * 900
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#define PPM_CH2_VAL_MAX TICKS_FOR_ONE_US * 2100
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#define PPM_CH2_VAL_CENTER TICKS_FOR_ONE_US * 1500
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#define PPM_CH1_FORCE_VAL_MIN 1800
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// PPM channel pre pulse lenght
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#define PPM_CH1_CHANNEL_PREPULSE_LENGHT 400
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@ -212,7 +211,7 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#ifdef PPM_CH2_V2 (PPMv2 is a 50 Hz 16 channels mode, used initialy on Futaba and later on other manufacturers modules)
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// Number of input PPM channels
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// Max input PPM channels
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#define PPM_CH2_CHANNELS 16
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// Frame period
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#define PPM_CH2_FRAME_PERIOD 20000 // frame period (microseconds)
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@ -224,7 +223,6 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#define PPM_CH2_VAL_MIN TICKS_FOR_ONE_US * 450
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#define PPM_CH2_VAL_MAX TICKS_FOR_ONE_US * 1050
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#define PPM_CH2_VAL_CENTER TICKS_FOR_ONE_US * 750
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#define PPM_CH1_FORCE_VAL_MIN 900
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// PPM channel pre pulse lenght
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#define PPM_CH1_CHANNEL_PREPULSE_LENGHT 200
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@ -237,7 +235,7 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#ifdef PPM_CH2_V3 (PPMv3 is a 40 Hz slower refresh frequency 16 channels mode to allow 16 channels with older transmitter modules)
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// Number of input PPM channels
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// Max input PPM channels
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#define PPM_CH2_CHANNELS 16
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// Frame period
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#define PPM_CH2_FRAME_PERIOD 25000 // frame period (microseconds)
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@ -249,7 +247,6 @@ volatile uint8_t servo_input_mode = JUMPER_SELECT_MODE;
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#define PPM_CH2_VAL_MIN TICKS_FOR_ONE_US * 750
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#define PPM_CH2_VAL_MAX TICKS_FOR_ONE_US * 1350
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#define PPM_CH2_VAL_CENTER TICKS_FOR_ONE_US * 1050
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#define PPM_CH1_FORCE_VAL_MIN 1260
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// PPM channel pre pulse lenght
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#define PPM_CH1_CHANNEL_PREPULSE_LENGHT 400
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@ -637,6 +634,19 @@ ISR( SERVO_INT_VECTOR )
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// ch2 switchover flag
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static bool switchover_ch2 = false;
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// Channel count detection ready flag
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static bool channel_count_ready_ch1 = false;
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static bool channel_count_ready_ch2 = false;
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// Channel count detected flag
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static bool channel_count_detected_ch1 = false;
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static bool channel_count_detected_ch2 = false;
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// Detected Channel count
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static uint8_t channel_count_ch1 = PPM_CH1_MAX_CHANNELS;
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static uint8_t channel_count_ch2 = PPM_CH2_MAX_CHANNELS;
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// -----------------------------------
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// PPM redundancy - decoder
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// -----------------------------------
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@ -666,13 +676,33 @@ CHECK_LOOP: // Input PPM pins check loop
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{
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if(sync_ch1 == true) // Are we synchronized ?
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{
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//We could add a test here for channel pre pulse lenght check
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// Ckeck for sync symbol
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if( ppm1_width[ ppm1_channel ] > PPM_CH1_MIN_SYNC_LENGHT ) || ( ppm1_width[ ppm1_channel ] < PPM_CH1_MAX_SYNC_LENGHT )
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{
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// Ckeck for channel count detected flag
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if( channel_count_detected_ch1 == false ) // We do not have channel count detected yet
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{
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channel_count_ch1 = ppm1_channel; // Store PPM1 channel count
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channel_count_ready_ch1 = true; // Set PPM1 channel count detection ready flag
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}
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else // Channel count has been detected
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{
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//We should not have a sync symbol here
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sync_error_ch1 = true; // Set sync error flag
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ppm1_channel = 0; // Reset PPM channel counter
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}
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}
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else // We have a new channel start (after channel 1)
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{
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//Todo: We could add a test here for channel pre pulse lenght check
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// Update channel counter
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ppm1_channel++;
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}
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// We have a new channel start, update channel counter
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ppm1_channel++;
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}
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// If not yet synchronized check for sync symbol end
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else if( ppm1_width > PPM_CH1_MIN_SYNC_LENGHT ) || ( ppm1_width < PPM_CH1_MAX_SYNC_LENGHT )
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// If not yet synchronized check for sync symbol
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else if( ppm1_width[ ppm1_channel ] > PPM_CH1_MIN_SYNC_LENGHT ) || ( ppm1_width[ ppm1_channel ] < PPM_CH1_MAX_SYNC_LENGHT )
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{
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// We have a valid sync symbol
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sync_error_ch1 = false; // Reset sync error flag
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@ -683,6 +713,7 @@ CHECK_LOOP: // Input PPM pins check loop
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else // We did not find a sync symbol
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{
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sync_error_ch1 = true; // Set sync error flag
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ppm1_channel = 0; // Reset PPM channel counter
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}
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}
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@ -692,29 +723,25 @@ CHECK_LOOP: // Input PPM pins check loop
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if(sync_ch1 == true) // Are we synchronized ?
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{
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// Check if channel pulse lenght is valid
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if( ppm1_width > ( PPM_CH1_VAL_MAX - PPM_CH1_CHANNEL_PREPULSE_LENGHT ) ) || ( ppm1_width < ( PPM_CH1_VAL_MIN - PPM_CH1_CHANNEL_PREPULSE_LENGHT ) )
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if( ppm1_width[ ppm1_channel ] > ( PPM_CH1_VAL_MAX - PPM_CH1_CHANNEL_PREPULSE_LENGHT ) ) || ( ppm1_width[ ppm1_channel ] < ( PPM_CH1_VAL_MIN - PPM_CH1_CHANNEL_PREPULSE_LENGHT ) )
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{
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// Reset channel error flag
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channel_error_ch1 = false;
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// todo : copy of PPM1 input channel to PPM output
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if( ppm1_channel = PPM_CH1_CHANNELS ) // Check for last channel
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if( ppm1_channel == channel_count_ch1 ) // Check for last channel
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{
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last_channel_ch1 = true;
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// Reset PPM channel count and sync flag
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sync_ch1 = false;
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ppm1_channel = 0;
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// We are at latest PPM channel
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last_channel_ch1 = true; // Set last channel flag
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sync_ch1 = false; // Reset sync flag
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ppm1_channel = 0; // Reset PPM channel counter
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}
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}
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else // We do not have a valid channel lenght
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{
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// Set channel error flag
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channel_error_ch1 = true;
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// Reset PPM channel count and sync flag
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sync_ch1 = false;
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ppm1_channel = 0;
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channel_error_ch1 = true; // Set channel error flag
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sync_ch1 = false; // Reset sync flag
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ppm1_channel = 0; // Reset PPM channel counter
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}
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}
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@ -727,11 +754,12 @@ CHECK_LOOP: // Input PPM pins check loop
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//----------------------------------------------------------------------------------------------------------------------
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// Todo : Conversion to PPM output format
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// Todo : rework code from line 830 to end of redundancy mode
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// Todo : channel count reliable auto detection - remove PPM standard extended frame format.
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// Todo : replace channel count defines with max channels count.
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// Todo : channel count auto detection : write post processing
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// Todo : sync between PPM input and output after switchover
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// Todo : Add delay inside switchover algo
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// Todo : Add LED code for APM 1.4
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//----------------------------------------------------------------------------------------------------------------------
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// -----------------------------------
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