diff options
Diffstat (limited to 'src/modules/px4iofirmware/controls.c')
-rw-r--r-- | src/modules/px4iofirmware/controls.c | 288 |
1 files changed, 186 insertions, 102 deletions
diff --git a/src/modules/px4iofirmware/controls.c b/src/modules/px4iofirmware/controls.c index 3cf9ca149..941500f0d 100644 --- a/src/modules/px4iofirmware/controls.c +++ b/src/modules/px4iofirmware/controls.c @@ -1,6 +1,6 @@ /**************************************************************************** * - * Copyright (C) 2012 PX4 Development Team. All rights reserved. + * Copyright (c) 2012-2014 PX4 Development Team. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -50,7 +50,7 @@ #define RC_CHANNEL_HIGH_THRESH 5000 #define RC_CHANNEL_LOW_THRESH -5000 -static bool ppm_input(uint16_t *values, uint16_t *num_values); +static bool ppm_input(uint16_t *values, uint16_t *num_values, uint16_t *frame_len); static perf_counter_t c_gather_dsm; static perf_counter_t c_gather_sbus; @@ -59,14 +59,19 @@ static perf_counter_t c_gather_ppm; void controls_init(void) { - /* DSM input */ + /* no channels */ + r_raw_rc_count = 0; + system_state.rc_channels_timestamp_received = 0; + system_state.rc_channels_timestamp_valid = 0; + + /* DSM input (USART1) */ dsm_init("/dev/ttyS0"); - /* S.bus input */ + /* S.bus input (USART3) */ sbus_init("/dev/ttyS2"); /* default to a 1:1 input map, all enabled */ - for (unsigned i = 0; i < MAX_CONTROL_CHANNELS; i++) { + for (unsigned i = 0; i < PX4IO_RC_INPUT_CHANNELS; i++) { unsigned base = PX4IO_P_RC_CONFIG_STRIDE * i; r_page_rc_input_config[base + PX4IO_P_RC_CONFIG_OPTIONS] = 0; @@ -94,16 +99,67 @@ controls_tick() { * other. Don't do that. */ + /* receive signal strenght indicator (RSSI). 0 = no connection, 255: perfect connection */ + uint16_t rssi = 0; + +#ifdef ADC_RSSI + if (r_setup_features & PX4IO_P_SETUP_FEATURES_ADC_RSSI) { + unsigned counts = adc_measure(ADC_RSSI); + if (counts != 0xffff) { + /* use 1:1 scaling on 3.3V ADC input */ + unsigned mV = counts * 3300 / 4096; + + /* scale to 0..253 */ + rssi = mV / 13; + } + } +#endif + perf_begin(c_gather_dsm); - bool dsm_updated = dsm_input(r_raw_rc_values, &r_raw_rc_count); - if (dsm_updated) - r_status_flags |= PX4IO_P_STATUS_FLAGS_RC_DSM; + uint16_t temp_count = r_raw_rc_count; + bool dsm_updated = dsm_input(r_raw_rc_values, &temp_count); + if (dsm_updated) { + r_raw_rc_flags |= PX4IO_P_STATUS_FLAGS_RC_DSM; + r_raw_rc_count = temp_count & 0x7fff; + if (temp_count & 0x8000) + r_raw_rc_flags |= PX4IO_P_RAW_RC_FLAGS_RC_DSM11; + else + r_raw_rc_flags &= ~PX4IO_P_RAW_RC_FLAGS_RC_DSM11; + + r_raw_rc_flags &= ~(PX4IO_P_RAW_RC_FLAGS_FRAME_DROP); + r_raw_rc_flags &= ~(PX4IO_P_RAW_RC_FLAGS_FAILSAFE); + + } perf_end(c_gather_dsm); perf_begin(c_gather_sbus); - bool sbus_updated = sbus_input(r_raw_rc_values, &r_raw_rc_count); - if (sbus_updated) + + bool sbus_status = (r_status_flags & PX4IO_P_STATUS_FLAGS_RC_SBUS); + + bool sbus_failsafe, sbus_frame_drop; + bool sbus_updated = sbus_input(r_raw_rc_values, &r_raw_rc_count, &sbus_failsafe, &sbus_frame_drop, PX4IO_RC_INPUT_CHANNELS); + + if (sbus_updated) { r_status_flags |= PX4IO_P_STATUS_FLAGS_RC_SBUS; + + rssi = 255; + + if (sbus_frame_drop) { + r_raw_rc_flags |= PX4IO_P_RAW_RC_FLAGS_FRAME_DROP; + rssi = 100; + } else { + r_raw_rc_flags &= ~(PX4IO_P_RAW_RC_FLAGS_FRAME_DROP); + } + + if (sbus_failsafe) { + r_raw_rc_flags |= PX4IO_P_RAW_RC_FLAGS_FAILSAFE; + rssi = 0; + } else { + r_raw_rc_flags &= ~(PX4IO_P_RAW_RC_FLAGS_FAILSAFE); + } + + } + perf_end(c_gather_sbus); /* @@ -112,12 +168,21 @@ controls_tick() { * disable the PPM decoder completely if we have S.bus signal. */ perf_begin(c_gather_ppm); - bool ppm_updated = ppm_input(r_raw_rc_values, &r_raw_rc_count); - if (ppm_updated) + bool ppm_updated = ppm_input(r_raw_rc_values, &r_raw_rc_count, &r_page_raw_rc_input[PX4IO_P_RAW_RC_DATA]); + if (ppm_updated) { + r_status_flags |= PX4IO_P_STATUS_FLAGS_RC_PPM; + r_raw_rc_flags &= ~(PX4IO_P_RAW_RC_FLAGS_FRAME_DROP); + r_raw_rc_flags &= ~(PX4IO_P_RAW_RC_FLAGS_FAILSAFE); + } perf_end(c_gather_ppm); - ASSERT(r_raw_rc_count <= MAX_CONTROL_CHANNELS); + /* limit number of channels to allowable data size */ + if (r_raw_rc_count > PX4IO_RC_INPUT_CHANNELS) + r_raw_rc_count = PX4IO_RC_INPUT_CHANNELS; + + /* store RSSI */ + r_page_raw_rc_input[PX4IO_P_RAW_RC_NRSSI] = rssi; /* * In some cases we may have received a frame, but input has still @@ -130,95 +195,100 @@ controls_tick() { */ if (dsm_updated || sbus_updated || ppm_updated) { - /* update RC-received timestamp */ - system_state.rc_channels_timestamp = hrt_absolute_time(); - /* record a bitmask of channels assigned */ unsigned assigned_channels = 0; - /* map raw inputs to mapped inputs */ - /* XXX mapping should be atomic relative to protocol */ - for (unsigned i = 0; i < r_raw_rc_count; i++) { - - /* map the input channel */ - uint16_t *conf = &r_page_rc_input_config[i * PX4IO_P_RC_CONFIG_STRIDE]; - - if (conf[PX4IO_P_RC_CONFIG_OPTIONS] & PX4IO_P_RC_CONFIG_OPTIONS_ENABLED) { - - uint16_t raw = r_raw_rc_values[i]; - - int16_t scaled; - - /* - * 1) Constrain to min/max values, as later processing depends on bounds. - */ - if (raw < conf[PX4IO_P_RC_CONFIG_MIN]) - raw = conf[PX4IO_P_RC_CONFIG_MIN]; - if (raw > conf[PX4IO_P_RC_CONFIG_MAX]) - raw = conf[PX4IO_P_RC_CONFIG_MAX]; - - /* - * 2) Scale around the mid point differently for lower and upper range. - * - * This is necessary as they don't share the same endpoints and slope. - * - * First normalize to 0..1 range with correct sign (below or above center), - * then scale to 20000 range (if center is an actual center, -10000..10000, - * if parameters only support half range, scale to 10000 range, e.g. if - * center == min 0..10000, if center == max -10000..0). - * - * As the min and max bounds were enforced in step 1), division by zero - * cannot occur, as for the case of center == min or center == max the if - * statement is mutually exclusive with the arithmetic NaN case. - * - * DO NOT REMOVE OR ALTER STEP 1! - */ - if (raw > (conf[PX4IO_P_RC_CONFIG_CENTER] + conf[PX4IO_P_RC_CONFIG_DEADZONE])) { - scaled = 10000.0f * ((raw - conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE]) / (float)(conf[PX4IO_P_RC_CONFIG_MAX] - conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE])); - - } else if (raw < (conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE])) { - scaled = 10000.0f * ((raw - conf[PX4IO_P_RC_CONFIG_CENTER] + conf[PX4IO_P_RC_CONFIG_DEADZONE]) / (float)(conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE] - conf[PX4IO_P_RC_CONFIG_MIN])); - - } else { - /* in the configured dead zone, output zero */ - scaled = 0; + /* update RC-received timestamp */ + system_state.rc_channels_timestamp_received = hrt_absolute_time(); + + /* do not command anything in failsafe, kick in the RC loss counter */ + if (!(r_raw_rc_flags & PX4IO_P_RAW_RC_FLAGS_FAILSAFE)) { + + /* update RC-received timestamp */ + system_state.rc_channels_timestamp_valid = system_state.rc_channels_timestamp_received; + + /* map raw inputs to mapped inputs */ + /* XXX mapping should be atomic relative to protocol */ + for (unsigned i = 0; i < r_raw_rc_count; i++) { + + /* map the input channel */ + uint16_t *conf = &r_page_rc_input_config[i * PX4IO_P_RC_CONFIG_STRIDE]; + + if (conf[PX4IO_P_RC_CONFIG_OPTIONS] & PX4IO_P_RC_CONFIG_OPTIONS_ENABLED) { + + uint16_t raw = r_raw_rc_values[i]; + + int16_t scaled; + + /* + * 1) Constrain to min/max values, as later processing depends on bounds. + */ + if (raw < conf[PX4IO_P_RC_CONFIG_MIN]) + raw = conf[PX4IO_P_RC_CONFIG_MIN]; + if (raw > conf[PX4IO_P_RC_CONFIG_MAX]) + raw = conf[PX4IO_P_RC_CONFIG_MAX]; + + /* + * 2) Scale around the mid point differently for lower and upper range. + * + * This is necessary as they don't share the same endpoints and slope. + * + * First normalize to 0..1 range with correct sign (below or above center), + * then scale to 20000 range (if center is an actual center, -10000..10000, + * if parameters only support half range, scale to 10000 range, e.g. if + * center == min 0..10000, if center == max -10000..0). + * + * As the min and max bounds were enforced in step 1), division by zero + * cannot occur, as for the case of center == min or center == max the if + * statement is mutually exclusive with the arithmetic NaN case. + * + * DO NOT REMOVE OR ALTER STEP 1! + */ + if (raw > (conf[PX4IO_P_RC_CONFIG_CENTER] + conf[PX4IO_P_RC_CONFIG_DEADZONE])) { + scaled = 10000.0f * ((raw - conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE]) / (float)(conf[PX4IO_P_RC_CONFIG_MAX] - conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE])); + + } else if (raw < (conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE])) { + scaled = 10000.0f * ((raw - conf[PX4IO_P_RC_CONFIG_CENTER] + conf[PX4IO_P_RC_CONFIG_DEADZONE]) / (float)(conf[PX4IO_P_RC_CONFIG_CENTER] - conf[PX4IO_P_RC_CONFIG_DEADZONE] - conf[PX4IO_P_RC_CONFIG_MIN])); + + } else { + /* in the configured dead zone, output zero */ + scaled = 0; + } + + /* invert channel if requested */ + if (conf[PX4IO_P_RC_CONFIG_OPTIONS] & PX4IO_P_RC_CONFIG_OPTIONS_REVERSE) + scaled = -scaled; + + /* and update the scaled/mapped version */ + unsigned mapped = conf[PX4IO_P_RC_CONFIG_ASSIGNMENT]; + if (mapped < PX4IO_CONTROL_CHANNELS) { + + /* invert channel if pitch - pulling the lever down means pitching up by convention */ + if (mapped == 1) /* roll, pitch, yaw, throttle, override is the standard order */ + scaled = -scaled; + + r_rc_values[mapped] = SIGNED_TO_REG(scaled); + assigned_channels |= (1 << mapped); + + } } - - /* invert channel if requested */ - if (conf[PX4IO_P_RC_CONFIG_OPTIONS] & PX4IO_P_RC_CONFIG_OPTIONS_REVERSE) - scaled = -scaled; - - /* and update the scaled/mapped version */ - unsigned mapped = conf[PX4IO_P_RC_CONFIG_ASSIGNMENT]; - ASSERT(mapped < MAX_CONTROL_CHANNELS); - - /* invert channel if pitch - pulling the lever down means pitching up by convention */ - if (mapped == 1) /* roll, pitch, yaw, throttle, override is the standard order */ - scaled = -scaled; - - r_rc_values[mapped] = SIGNED_TO_REG(scaled); - assigned_channels |= (1 << mapped); } - } - /* set un-assigned controls to zero */ - for (unsigned i = 0; i < MAX_CONTROL_CHANNELS; i++) { - if (!(assigned_channels & (1 << i))) - r_rc_values[i] = 0; - } + /* set un-assigned controls to zero */ + for (unsigned i = 0; i < PX4IO_CONTROL_CHANNELS; i++) { + if (!(assigned_channels & (1 << i))) + r_rc_values[i] = 0; + } - /* - * If we got an update with zero channels, treat it as - * a loss of input. - * - * This might happen if a protocol-based receiver returns an update - * that contains no channels that we have mapped. - */ - if (assigned_channels == 0) { - rc_input_lost = true; - } else { - /* set RC OK flag */ + /* set RC OK flag, as we got an update */ r_status_flags |= PX4IO_P_STATUS_FLAGS_RC_OK; + + /* if we have enough channels (5) to control the vehicle, the mapping is ok */ + if (assigned_channels > 4) { + r_raw_rc_flags |= PX4IO_P_RAW_RC_FLAGS_MAPPING_OK; + } else { + r_raw_rc_flags &= ~(PX4IO_P_RAW_RC_FLAGS_MAPPING_OK); + } } /* @@ -231,7 +301,7 @@ controls_tick() { * If we haven't seen any new control data in 200ms, assume we * have lost input. */ - if (hrt_elapsed_time(&system_state.rc_channels_timestamp) > 200000) { + if (hrt_elapsed_time(&system_state.rc_channels_timestamp_received) > 200000) { rc_input_lost = true; /* clear the input-kind flags here */ @@ -239,24 +309,32 @@ controls_tick() { PX4IO_P_STATUS_FLAGS_RC_PPM | PX4IO_P_STATUS_FLAGS_RC_DSM | PX4IO_P_STATUS_FLAGS_RC_SBUS); + } /* * Handle losing RC input */ - if (rc_input_lost) { + /* this kicks in if the receiver is gone or the system went to failsafe */ + if (rc_input_lost || (r_raw_rc_flags & PX4IO_P_RAW_RC_FLAGS_FAILSAFE)) { /* Clear the RC input status flag, clear manual override flag */ r_status_flags &= ~( PX4IO_P_STATUS_FLAGS_OVERRIDE | PX4IO_P_STATUS_FLAGS_RC_OK); + /* Mark all channels as invalid, as we just lost the RX */ + r_rc_valid = 0; + /* Set the RC_LOST alarm */ r_status_alarms |= PX4IO_P_STATUS_ALARMS_RC_LOST; + } + + /* this kicks in if the receiver is completely gone */ + if (rc_input_lost) { - /* Mark the arrays as empty */ + /* Set channel count to zero */ r_raw_rc_count = 0; - r_rc_valid = 0; } /* @@ -279,7 +357,7 @@ controls_tick() { * requested override. * */ - if ((r_status_flags & PX4IO_P_STATUS_FLAGS_RC_OK) && (REG_TO_SIGNED(r_rc_values[4]) > RC_CHANNEL_HIGH_THRESH)) + if ((r_status_flags & PX4IO_P_STATUS_FLAGS_RC_OK) && (REG_TO_SIGNED(r_rc_values[4]) < RC_CHANNEL_LOW_THRESH)) override = true; if (override) { @@ -293,11 +371,13 @@ controls_tick() { } else { r_status_flags &= ~PX4IO_P_STATUS_FLAGS_OVERRIDE; } + } else { + r_status_flags &= ~PX4IO_P_STATUS_FLAGS_OVERRIDE; } } static bool -ppm_input(uint16_t *values, uint16_t *num_values) +ppm_input(uint16_t *values, uint16_t *num_values, uint16_t *frame_len) { bool result = false; @@ -312,8 +392,8 @@ ppm_input(uint16_t *values, uint16_t *num_values) /* PPM data exists, copy it */ *num_values = ppm_decoded_channels; - if (*num_values > MAX_CONTROL_CHANNELS) - *num_values = MAX_CONTROL_CHANNELS; + if (*num_values > PX4IO_RC_INPUT_CHANNELS) + *num_values = PX4IO_RC_INPUT_CHANNELS; for (unsigned i = 0; i < *num_values; i++) values[i] = ppm_buffer[i]; @@ -321,6 +401,10 @@ ppm_input(uint16_t *values, uint16_t *num_values) /* clear validity */ ppm_last_valid_decode = 0; + /* store PPM frame length */ + if (num_values) + *frame_len = ppm_frame_length; + /* good if we got any channels */ result = (*num_values > 0); } |