Import code to generate RRLP ephemeris data from u-blox GPS receiver
taken from http://www.246tnt.com/files/rrlp-20091101.tar.bz2
diff --git a/rrlp-ephemeris/ubx.h b/rrlp-ephemeris/ubx.h
new file mode 100644
index 0000000..8264386
--- /dev/null
+++ b/rrlp-ephemeris/ubx.h
@@ -0,0 +1,232 @@
+/*
+ * ubx.h
+ *
+ * Header for UBX related stuff
+ *
+ *
+ * Copyright (C) 2009 Sylvain Munaut <tnt@246tNt.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __UBX_H__
+#define __UBX_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+/* Constants used in UBX */
+
+ /* Sync bytes (two first bytes of each message) */
+#define UBX_SYNC0 0xb5
+#define UBX_SYNC1 0x62
+
+ /* UBX messages classes */
+#define UBX_CLASS_NAV 0x01
+#define UBX_CLASS_RXM 0x02
+#define UBX_CLASS_INF 0x04
+#define UBX_CLASS_ACK 0x05
+#define UBX_CLASS_CFG 0x06
+#define UBX_CLASS_UPD 0x09
+#define UBX_CLASS_MON 0x0a
+#define UBX_CLASS_AID 0x0b
+#define UBX_CLASS_TIM 0x0d
+
+ /* UBX messages type ID (by class) */
+#define UBX_NAV_POSECEF 0x01
+#define UBX_NAV_POSLLH 0x02
+#define UBX_NAV_STATUS 0x03
+#define UBX_NAV_DOP 0x04
+#define UBX_NAV_SOL 0x06
+#define UBX_NAV_POSUTM 0x08
+#define UBX_NAV_VELECEF 0x11
+#define UBX_NAV_VELNED 0x12
+#define UBX_NAV_TIMEGPS 0x20
+#define UBX_NAV_TIMEUTC 0x21
+#define UBX_NAV_CLOCK 0x22
+#define UBX_NAV_SVINFO 0x30
+#define UBX_NAV_DGPS 0x31
+#define UBX_NAV_SBAS 0x32
+#define UBX_NAV_EKFSTATUS 0x40
+
+#define UBX_RXM_RAW 0x10
+#define UBX_RXM_SFRB 0x11
+#define UBX_RXM_SVSI 0x20
+#define UBX_RXM_SVSI_GPS 0x20
+#define UBX_RXM_ALM 0x30
+#define UBX_RXM_EPH 0x31
+#define UBX_RXM_POSREQ 0x40
+
+#define UBX_INF_ERROR 0x00
+#define UBX_INF_WARNING 0x01
+#define UBX_INF_NOTICE 0x02
+#define UBX_INF_TEST 0x03
+#define UBX_INF_DEBUG 0x04
+#define UBX_INF_USER 0x07
+
+#define UBX_ACK_NAK 0x00
+#define UBX_ACK_ACK 0x01
+
+#define UBX_CFG_PRT 0x00
+#define UBX_CFG_USB 0x1b
+#define UBX_CFG_MSG 0x01
+#define UBX_CFG_NMEA 0x17
+#define UBX_CFG_RATE 0x08
+#define UBX_CFG_CFG 0x09
+#define UBX_CFG_TP 0x07
+#define UBX_CFG_NAV2 0x1a
+#define UBX_CFG_DAT 0x06
+#define UBX_CFG_INF 0x02
+#define UBX_CFG_RST 0x04
+#define UBX_CFG_RXM 0x11
+#define UBX_CFG_ANT 0x13
+#define UBX_CFG_FXN 0x0e
+#define UBX_CFG_SBAS 0x16
+#define UBX_CFG_LIC 0x80
+#define UBX_CFG_TM 0x10
+#define UBX_CFG_TM2 0x19
+#define UBX_CFG_TMODE 0x1d
+#define UBX_CFG_EKF 0x12
+
+#define UBX_UPD_DOWNL 0x01
+#define UBX_UPD_UPLOAD 0x02
+#define UBX_UPD_EXEC 0x03
+#define UBX_UPD_MEMCPY 0x04
+
+#define UBX_MON_SCHD 0x01
+#define UBX_MON_IO 0x02
+#define UBX_MON_IPC 0x03
+#define UBX_MON_VER 0x04
+#define UBX_MON_EXCEPT 0x05
+#define UBX_MON_MSGPP 0x06
+#define UBX_MON_RXBUF 0x07
+#define UBX_MON_TXBUF 0x08
+#define UBX_MON_HW 0x09
+#define UBX_MON_USB 0x0a
+
+#define UBX_AID_REQ 0x00
+#define UBX_AID_INI 0x01
+#define UBX_AID_HUI 0x02
+#define UBX_AID_DATA 0x10
+#define UBX_AID_ALM 0x30
+#define UBX_AID_EPH 0x31
+
+#define UBX_TIM_TP 0x01
+#define UBX_TIM_TM 0x02
+#define UBX_TIM_TM2 0x03
+#define UBX_TIM_SVIN 0x04
+
+
+/* Header */
+struct ubx_hdr {
+ uint8_t sync[2];
+ uint8_t msg_class;
+ uint8_t msg_id;
+ uint16_t payload_len;
+} __attribute__((packed));
+
+
+/* Payload formats (some of them) */
+struct ubx_nav_posllh {
+ uint32_t itow;
+ int32_t lon; /* scaling 1e-7 */
+ int32_t lat; /* scaling 1e-7 */
+ int32_t height;/* mm */
+ int32_t hsl; /* mm */
+ uint32_t hacc; /* mm */
+ uint32_t vacc; /* mm */
+} __attribute__((packed));
+
+struct ubx_aid_ini {
+ int32_t x;
+ int32_t y;
+ int32_t z;
+ uint32_t posacc;
+ uint16_t tm_cfg;
+ uint16_t wn;
+ uint32_t tow;
+ int32_t tow_ns;
+ uint32_t tacc_ms;
+ uint32_t tacc_ns;
+ int32_t clkd;
+ uint32_t clkdacc;
+ uint32_t flags;
+} __attribute__((packed));
+
+struct ubx_aid_hui {
+ uint32_t health;
+ double utc_a1;
+ double utc_a0;
+ int32_t utc_tot;
+ int16_t utc_wnt;
+ int16_t utc_ls;
+ int16_t utc_wnf;
+ int16_t utc_dn;
+ int16_t utc_lsf;
+ int16_t utc_spare;
+ float klob_a0;
+ float klob_a1;
+ float klob_a2;
+ float klob_a3;
+ float klob_b0;
+ float klob_b1;
+ float klob_b2;
+ float klob_b3;
+ uint32_t flags;
+} __attribute__((packed));
+
+struct ubx_aid_alm {
+ uint32_t sv_id;
+ uint32_t gps_week;
+ uint32_t alm_words[8]; /* Present only if 'gps_week' != 0 */
+} __attribute__((packed));
+
+struct ubx_aid_eph {
+ uint32_t sv_id;
+ uint32_t present;
+ uint32_t eph_words[24]; /* Present only if 'present' != 0 */
+} __attribute__((packed));
+
+
+/* Message handler */
+typedef void (*ubx_msg_handler_t)(
+ struct ubx_hdr *hdr, void *payload, int payload_len, void *userdata);
+
+struct ubx_dispatch_entry {
+ uint8_t msg_class;
+ uint8_t msg_id;
+ ubx_msg_handler_t handler;
+};
+
+#define UBX_DISPATCH(kls,id,hdl) { \
+ .msg_class = UBX_CLASS_ ## kls , \
+ .msg_id = UBX_ ## kls ## _ ## id, \
+ .handler = (hdl), \
+}
+
+
+/* Methods */
+int ubx_msg_dispatch(struct ubx_dispatch_entry *dt,
+ void *msg, int len, void *userdata);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __UBX_H__ */
+