diff options
Diffstat (limited to 'apps/gps/ubx.c')
-rw-r--r-- | apps/gps/ubx.c | 327 |
1 files changed, 235 insertions, 92 deletions
diff --git a/apps/gps/ubx.c b/apps/gps/ubx.c index e15ed4e00..50bf579a0 100644 --- a/apps/gps/ubx.c +++ b/apps/gps/ubx.c @@ -52,7 +52,7 @@ #define UBX_HEALTH_FAIL_COUNTER_LIMIT 3 #define UBX_HEALTH_PROBE_COUNTER_LIMIT 4 -#define UBX_BUFFER_SIZE 1000 +#define UBX_BUFFER_SIZE 500 extern bool gps_mode_try_all; extern bool gps_mode_success; @@ -63,18 +63,10 @@ extern int current_gps_speed; pthread_mutex_t *ubx_mutex; gps_bin_ubx_state_t *ubx_state; +enum UBX_CONFIG_STATE ubx_config_state; static struct vehicle_gps_position_s *ubx_gps; -//Definitions for ubx, last two bytes are checksum which is calculated below -uint8_t UBX_CONFIG_MESSAGE_PRT[] = {0xB5 , 0x62 , 0x06 , 0x00 , 0x14 , 0x00 , 0x01 , 0x00 , 0x00 , 0x00 , 0xD0 , 0x08 , 0x00 , 0x00 , 0x80 , 0x25 , 0x00 , 0x00 , 0x07 , 0x00 , 0x01 , 0x00 , 0x00 , 0x00 , 0x00 , 0x00}; -uint8_t UBX_CONFIG_MESSAGE_MSG_NAV_POSLLH[] = {0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0x01, 0x02, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00}; -uint8_t UBX_CONFIG_MESSAGE_MSG_NAV_TIMEUTC[] = {0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0x01, 0x21, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00}; -uint8_t UBX_CONFIG_MESSAGE_MSG_NAV_DOP[] = {0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0x01, 0x04, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00}; -uint8_t UBX_CONFIG_MESSAGE_MSG_NAV_SVINFO[] = {0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0x01, 0x30, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00}; -uint8_t UBX_CONFIG_MESSAGE_MSG_NAV_SOL[] = {0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0x01, 0x06, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00}; -uint8_t UBX_CONFIG_MESSAGE_MSG_NAV_VELNED[] = {0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0x01, 0x12, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00}; -uint8_t UBX_CONFIG_MESSAGE_MSG_RXM_SVSI[] = {0xB5, 0x62, 0x06, 0x01, 0x08, 0x00, 0x02, 0x20, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00}; void ubx_decode_init(void) { @@ -100,15 +92,15 @@ void ubx_checksum(uint8_t b, uint8_t *ck_a, uint8_t *ck_b) int ubx_parse(uint8_t b, char *gps_rx_buffer) { -// printf("b=%x\n",b); + //printf("b=%x\n",b); if (ubx_state->decode_state == UBX_DECODE_UNINIT) { - if (b == 0xb5) { + if (b == UBX_SYNC_1) { ubx_state->decode_state = UBX_DECODE_GOT_SYNC1; } } else if (ubx_state->decode_state == UBX_DECODE_GOT_SYNC1) { - if (b == 0x62) { + if (b == UBX_SYNC_2) { ubx_state->decode_state = UBX_DECODE_GOT_SYNC2; } else { @@ -122,16 +114,25 @@ int ubx_parse(uint8_t b, char *gps_rx_buffer) //check for known class switch (b) { - case UBX_CLASS_NAV: //NAV + case UBX_CLASS_ACK: + ubx_state->decode_state = UBX_DECODE_GOT_CLASS; + ubx_state->message_class = ACK; + break; + + case UBX_CLASS_NAV: ubx_state->decode_state = UBX_DECODE_GOT_CLASS; ubx_state->message_class = NAV; break; - case UBX_CLASS_RXM: //RXM + case UBX_CLASS_RXM: ubx_state->decode_state = UBX_DECODE_GOT_CLASS; ubx_state->message_class = RXM; break; + case UBX_CLASS_CFG: + ubx_state->decode_state = UBX_DECODE_GOT_CLASS; + ubx_state->message_class = CFG; + break; default: //unknown class: reset state machine ubx_decode_init(); break; @@ -193,9 +194,36 @@ int ubx_parse(uint8_t b, char *gps_rx_buffer) ubx_decode_init(); break; } + break; + case CFG: + switch (b) { + case UBX_MESSAGE_CFG_NAV5: + ubx_state->decode_state = UBX_DECODE_GOT_MESSAGEID; + ubx_state->message_id = CFG_NAV5; + break; + + default: //unknown class: reset state machine, should not happen + ubx_decode_init(); + break; + } break; + case ACK: + switch (b) { + case UBX_MESSAGE_ACK_ACK: + ubx_state->decode_state = UBX_DECODE_GOT_MESSAGEID; + ubx_state->message_id = ACK_ACK; + break; + case UBX_MESSAGE_ACK_NAK: + ubx_state->decode_state = UBX_DECODE_GOT_MESSAGEID; + ubx_state->message_id = ACK_NAK; + break; + default: //unknown class: reset state machine, should not happen + ubx_decode_init(); + break; + } + break; default: //should not happen ubx_decode_init(); break; @@ -542,6 +570,75 @@ int ubx_parse(uint8_t b, char *gps_rx_buffer) break; } + case ACK_ACK: { +// printf("GOT ACK_ACK\n"); + gps_bin_ack_ack_packet_t *packet = (gps_bin_ack_ack_packet_t *) gps_rx_buffer; + + //Check if checksum is valid + if (ubx_state->ck_a == packet->ck_a && ubx_state->ck_b == packet->ck_b) { + + switch (ubx_config_state) { + case UBX_CONFIG_STATE_PRT: + if (packet->clsID == UBX_CLASS_CFG && packet->msgID == UBX_MESSAGE_CFG_PRT) + ubx_config_state++; + break; + case UBX_CONFIG_STATE_NAV5: + if (packet->clsID == UBX_CLASS_CFG && packet->msgID == UBX_MESSAGE_CFG_NAV5) + ubx_config_state++; + break; + case UBX_CONFIG_STATE_MSG_NAV_POSLLH: + case UBX_CONFIG_STATE_MSG_NAV_TIMEUTC: + case UBX_CONFIG_STATE_MSG_NAV_DOP: + case UBX_CONFIG_STATE_MSG_NAV_SVINFO: + case UBX_CONFIG_STATE_MSG_NAV_SOL: + case UBX_CONFIG_STATE_MSG_NAV_VELNED: + case UBX_CONFIG_STATE_MSG_RXM_SVSI: + if (packet->clsID == UBX_CLASS_CFG && packet->msgID == UBX_MESSAGE_CFG_MSG) + ubx_config_state++; + break; + default: + break; + } + + + ret = 1; + + } else { + if (gps_verbose) printf("[gps] ACK_ACK: checksum invalid\n"); + + ret = 0; + } + + // Reset state machine to decode next packet + ubx_decode_init(); + return ret; + + break; + } + + case ACK_NAK: { +// printf("GOT ACK_NAK\n"); + gps_bin_ack_nak_packet_t *packet = (gps_bin_ack_nak_packet_t *) gps_rx_buffer; + + //Check if checksum is valid + if (ubx_state->ck_a == packet->ck_a && ubx_state->ck_b == packet->ck_b) { + + if (gps_verbose) printf("[gps] the ubx gps returned: not acknowledged\n"); + ret = 1; + + } else { + if (gps_verbose) printf("[gps] ACK_NAK: checksum invalid\n"); + + ret = 0; + } + + // Reset state machine to decode next packet + ubx_decode_init(); + return ret; + + break; + } + default: //something went wrong ubx_decode_init(); @@ -574,53 +671,105 @@ void calculate_ubx_checksum(uint8_t *message, uint8_t length) message[length - 2] = ck_a; message[length - 1] = ck_b; - -// printf("[%x,%x]", ck_a, ck_b); - -// printf("[%x,%x]\n", message[length-2], message[length-1]); } int configure_gps_ubx(int *fd) { - //fflush(((FILE *)fd)); - - //TODO: write this in a loop once it is tested - //UBX_CFG_PRT_PART: - write_config_message_ubx(UBX_CONFIG_MESSAGE_PRT, sizeof(UBX_CONFIG_MESSAGE_PRT) / sizeof(uint8_t) , *fd); - - usleep(100000); - - //NAV_POSLLH: - write_config_message_ubx(UBX_CONFIG_MESSAGE_MSG_NAV_POSLLH, sizeof(UBX_CONFIG_MESSAGE_MSG_NAV_POSLLH) / sizeof(uint8_t) , *fd); - usleep(100000); - - //NAV_TIMEUTC: - write_config_message_ubx(UBX_CONFIG_MESSAGE_MSG_NAV_TIMEUTC, sizeof(UBX_CONFIG_MESSAGE_MSG_NAV_TIMEUTC) / sizeof(uint8_t) , *fd); - usleep(100000); - - //NAV_DOP: - write_config_message_ubx(UBX_CONFIG_MESSAGE_MSG_NAV_DOP, sizeof(UBX_CONFIG_MESSAGE_MSG_NAV_DOP) / sizeof(uint8_t) , *fd); - usleep(100000); - - //NAV_SOL: - write_config_message_ubx(UBX_CONFIG_MESSAGE_MSG_NAV_SOL, sizeof(UBX_CONFIG_MESSAGE_MSG_NAV_SOL) / sizeof(uint8_t) , *fd); - usleep(100000); - - - //NAV_SVINFO: - write_config_message_ubx(UBX_CONFIG_MESSAGE_MSG_NAV_SVINFO, sizeof(UBX_CONFIG_MESSAGE_MSG_NAV_SVINFO) / sizeof(uint8_t) , *fd); - usleep(100000); - - //NAV_VELNED: - write_config_message_ubx(UBX_CONFIG_MESSAGE_MSG_NAV_VELNED, sizeof(UBX_CONFIG_MESSAGE_MSG_NAV_VELNED) / sizeof(uint8_t) , *fd); - usleep(100000); - - - //RXM_SVSI: - write_config_message_ubx(UBX_CONFIG_MESSAGE_MSG_RXM_SVSI, sizeof(UBX_CONFIG_MESSAGE_MSG_RXM_SVSI) / sizeof(uint8_t) , *fd); - usleep(100000); - - return 0; + // only needed once like this + const type_gps_bin_cfg_prt_packet_t cfg_prt_packet = { + .clsID = UBX_CLASS_CFG, + .msgID = UBX_MESSAGE_CFG_PRT, + .length = UBX_CFG_PRT_LENGTH, + .portID = UBX_CFG_PRT_PAYLOAD_PORTID, + .mode = UBX_CFG_PRT_PAYLOAD_MODE, + .baudRate = current_gps_speed, + .inProtoMask = UBX_CFG_PRT_PAYLOAD_INPROTOMASK, + .outProtoMask = UBX_CFG_PRT_PAYLOAD_OUTPROTOMASK, + .ck_a = 0, + .ck_b = 0 + }; + + // only needed once like this + const type_gps_bin_cfg_nav5_packet_t cfg_nav5_packet = { + .clsID = UBX_CLASS_CFG, + .msgID = UBX_MESSAGE_CFG_NAV5, + .length = UBX_CFG_NAV5_LENGTH, + .mask = UBX_CFG_NAV5_PAYLOAD_MASK, + .dynModel = UBX_CFG_NAV5_PAYLOAD_DYNMODEL, + .fixMode = UBX_CFG_NAV5_PAYLOAD_FIXMODE, + .ck_a = 0, + .ck_b = 0 + }; + + // this message is reusable for different configuration commands, so not const + type_gps_bin_cfg_msg_packet cfg_msg_packet = { + .clsID = UBX_CLASS_CFG, + .msgID = UBX_MESSAGE_CFG_MSG, + .length = UBX_CFG_MSG_LENGTH, + .rate = UBX_CFG_MSG_PAYLOAD_RATE + }; + + uint64_t time_before_config = hrt_absolute_time(); + + while(hrt_absolute_time() < time_before_config + UBX_CONFIG_TIMEOUT) { + +// if (gps_verbose) printf("[gps] ubx config state: %d\n", ubx_config_state); + + switch (ubx_config_state) { + case UBX_CONFIG_STATE_PRT: +// if (gps_verbose) printf("[gps] Configuring ubx with baudrate: %d\n", cfg_prt_packet.baudRate); + + write_config_message_ubx((uint8_t*)(&cfg_prt_packet), sizeof(cfg_prt_packet), fd); + break; + case UBX_CONFIG_STATE_NAV5: + write_config_message_ubx((uint8_t*)(&cfg_nav5_packet), sizeof(cfg_nav5_packet), fd); + break; + case UBX_CONFIG_STATE_MSG_NAV_POSLLH: + cfg_msg_packet.msgClass_payload = UBX_CLASS_NAV; + cfg_msg_packet.msgID_payload = UBX_MESSAGE_NAV_POSLLH; + write_config_message_ubx((uint8_t*)(&cfg_msg_packet), sizeof(cfg_msg_packet), fd); + break; + case UBX_CONFIG_STATE_MSG_NAV_TIMEUTC: + cfg_msg_packet.msgClass_payload = UBX_CLASS_NAV; + cfg_msg_packet.msgID_payload = UBX_MESSAGE_NAV_TIMEUTC; + write_config_message_ubx((uint8_t*)(&cfg_msg_packet), sizeof(cfg_msg_packet), fd); + break; + case UBX_CONFIG_STATE_MSG_NAV_DOP: + cfg_msg_packet.msgClass_payload = UBX_CLASS_NAV; + cfg_msg_packet.msgID_payload = UBX_MESSAGE_NAV_DOP; + write_config_message_ubx((uint8_t*)(&cfg_msg_packet), sizeof(cfg_msg_packet), fd); + break; + case UBX_CONFIG_STATE_MSG_NAV_SVINFO: + cfg_msg_packet.msgClass_payload = UBX_CLASS_NAV; + cfg_msg_packet.msgID_payload = UBX_MESSAGE_NAV_SVINFO; + write_config_message_ubx((uint8_t*)(&cfg_msg_packet), sizeof(cfg_msg_packet), fd); + break; + case UBX_CONFIG_STATE_MSG_NAV_SOL: + cfg_msg_packet.msgClass_payload = UBX_CLASS_NAV; + cfg_msg_packet.msgID_payload = UBX_MESSAGE_NAV_SOL; + write_config_message_ubx((uint8_t*)(&cfg_msg_packet), sizeof(cfg_msg_packet), fd); + break; + case UBX_CONFIG_STATE_MSG_NAV_VELNED: + cfg_msg_packet.msgClass_payload = UBX_CLASS_NAV; + cfg_msg_packet.msgID_payload = UBX_MESSAGE_NAV_VELNED; + write_config_message_ubx((uint8_t*)(&cfg_msg_packet), sizeof(cfg_msg_packet), fd); + break; + case UBX_CONFIG_STATE_MSG_RXM_SVSI: + cfg_msg_packet.msgClass_payload = UBX_CLASS_RXM; + cfg_msg_packet.msgID_payload = UBX_MESSAGE_RXM_SVSI; + write_config_message_ubx((uint8_t*)(&cfg_msg_packet), sizeof(cfg_msg_packet), fd); + break; + case UBX_CONFIG_STATE_CONFIGURED: + if (gps_verbose) printf("[gps] ubx configuration finished\n"); + return OK; + break; + default: + break; + } + usleep(10000); + } + if (gps_verbose) printf("[gps] ubx configuration timeout\n"); + return ERROR; } @@ -637,22 +786,17 @@ int read_gps_ubx(int *fd, char *gps_rx_buffer, int buffer_size) fds.events = POLLIN; // UBX GPS mode - // This blocks the task until there is something on the buffer while (1) { //check if the thread should terminate if (terminate_gps_thread == true) { -// printf("terminate_gps_thread=%u ", terminate_gps_thread); -// printf("exiting mtk thread\n"); -// fflush(stdout); ret = 1; break; } - if (poll(&fds, 1, 1000) > 0) { if (read(*fd, &c, 1) > 0) { - // printf("Read %x\n",c); +// printf("Read %x\n",c); if (rx_count >= buffer_size) { // The buffer is already full and we haven't found a valid ubx sentence. // Flush the buffer and note the overflow event. @@ -671,7 +815,7 @@ int read_gps_ubx(int *fd, char *gps_rx_buffer, int buffer_size) int msg_read = ubx_parse(c, gps_rx_buffer); if (msg_read > 0) { - // printf("Found sequence\n"); + //printf("Found sequence\n"); break; } @@ -688,28 +832,41 @@ int read_gps_ubx(int *fd, char *gps_rx_buffer, int buffer_size) return ret; } -int write_config_message_ubx(uint8_t *message, size_t length, int fd) +int write_config_message_ubx(const uint8_t *message, const size_t length, const int *fd) { - //calculate and write checksum to the end uint8_t ck_a = 0; uint8_t ck_b = 0; unsigned int i; - for (i = 2; i < length; i++) { + uint8_t buffer[2]; + ssize_t result_write = 0; + + //calculate and write checksum to the end + for (i = 0; i < length-2; i++) { ck_a = ck_a + message[i]; ck_b = ck_b + ck_a; } -// printf("[%x,%x]\n", ck_a, ck_b); + // write sync bytes first + buffer[0] = UBX_SYNC_1; + buffer[1] = UBX_SYNC_2; + + // write config message without the checksum + result_write = write(*fd, buffer, sizeof(buffer)); + result_write += write(*fd, message, length-2); + + buffer[0] = ck_a; + buffer[1] = ck_b; - unsigned int result_write = write(fd, message, length); - result_write += write(fd, &ck_a, 1); - result_write += write(fd, &ck_b, 1); - fsync(fd); + // write the checksum + result_write += write(*fd, buffer, sizeof(buffer)); - return (result_write != length + 2); //return 0 as success + fsync(*fd); + if ((unsigned int)result_write != length + 2) + return ERROR; + return OK; } void *ubx_watchdog_loop(void *args) @@ -723,6 +880,9 @@ void *ubx_watchdog_loop(void *args) int *fd = arguments->fd_ptr; bool *thread_should_exit = arguments->thread_should_exit_ptr; + /* first try to configure the GPS anyway */ + configure_gps_ubx(fd); + /* GPS watchdog error message skip counter */ bool ubx_healthy = false; @@ -732,7 +892,7 @@ void *ubx_watchdog_loop(void *args) bool once_ok = false; int mavlink_fd = open(MAVLINK_LOG_DEVICE, 0); - + ubx_config_state = UBX_CONFIG_STATE_PRT; //int err_skip_counter = 0; while (!(*thread_should_exit)) { @@ -833,23 +993,6 @@ void *ubx_loop(void *args) /* set parameters for ubx */ - if (configure_gps_ubx(fd) != 0) { - printf("[gps] Configuration of gps module to ubx failed\n"); - - /* Write shared variable sys_status */ - // TODO enable this again - //global_data_send_subsystem_info(&ubx_present); - - } else { - if (gps_verbose) printf("[gps] Attempting to configure GPS to UBX binary protocol\n"); - - // XXX Shouldn't the system status only change if the module is known to work ok? - - /* Write shared variable sys_status */ - // TODO enable this again - //global_data_send_subsystem_info(&ubx_present_enabled); - } - struct vehicle_gps_position_s ubx_gps_d = {.counter = 0}; ubx_gps = &ubx_gps_d; |