diff --git a/examples/common.c b/examples/common.c
index 10eb496..4b3a63f 100644
--- a/examples/common.c
+++ b/examples/common.c
@@ -95,6 +95,7 @@ static const backend_table_t g_backends[] = {
{"lynx", DC_FAMILY_LIQUIVISION_LYNX, 0},
{"sp2", DC_FAMILY_SPORASUB_SP2, 0},
{"excursion", DC_FAMILY_DEEPSIX_EXCURSION, 0},
+ {"screen", DC_FAMILY_SEAC_SCREEN, 0},
};
static const transport_table_t g_transports[] = {
diff --git a/include/libdivecomputer/common.h b/include/libdivecomputer/common.h
index f6ca9fe..3553cf8 100644
--- a/include/libdivecomputer/common.h
+++ b/include/libdivecomputer/common.h
@@ -112,6 +112,8 @@ typedef enum dc_family_t {
DC_FAMILY_SPORASUB_SP2 = (18 << 16),
/* Deep Six */
DC_FAMILY_DEEPSIX_EXCURSION = (19 << 16),
+ /* Seac Screen */
+ DC_FAMILY_SEAC_SCREEN = (20 << 16),
} dc_family_t;
#ifdef __cplusplus
diff --git a/msvc/libdivecomputer.vcxproj b/msvc/libdivecomputer.vcxproj
index 5c8fe3a..84bac6b 100644
--- a/msvc/libdivecomputer.vcxproj
+++ b/msvc/libdivecomputer.vcxproj
@@ -227,6 +227,8 @@
+
+
@@ -336,6 +338,7 @@
+
diff --git a/src/Makefile.am b/src/Makefile.am
index 5cec346..58916b6 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -76,6 +76,7 @@ libdivecomputer_la_SOURCES = \
liquivision_lynx.h liquivision_lynx.c liquivision_lynx_parser.c \
sporasub_sp2.h sporasub_sp2.c sporasub_sp2_parser.c \
deepsix_excursion.h deepsix_excursion.c deepsix_excursion_parser.c \
+ seac_screen.h seac_screen.c seac_screen_parser.c \
socket.h socket.c \
irda.c \
usb.c \
diff --git a/src/descriptor.c b/src/descriptor.c
index b55b2c3..0416157 100644
--- a/src/descriptor.c
+++ b/src/descriptor.c
@@ -429,6 +429,9 @@ static const dc_descriptor_t g_descriptors[] = {
{"Crest", "CR-4", DC_FAMILY_DEEPSIX_EXCURSION, 0, DC_TRANSPORT_BLE, dc_filter_deepsix},
{"Genesis", "Centauri", DC_FAMILY_DEEPSIX_EXCURSION, 0, DC_TRANSPORT_BLE, dc_filter_deepsix},
{"Tusa", "TC1", DC_FAMILY_DEEPSIX_EXCURSION, 0, DC_TRANSPORT_BLE, dc_filter_deepsix},
+ /* Seac Screen */
+ {"Seac", "Screen", DC_FAMILY_SEAC_SCREEN, 0, DC_TRANSPORT_SERIAL, NULL},
+ {"Seac", "Action", DC_FAMILY_SEAC_SCREEN, 0, DC_TRANSPORT_SERIAL, NULL},
};
static int
diff --git a/src/device.c b/src/device.c
index affebc8..3080e6a 100644
--- a/src/device.c
+++ b/src/device.c
@@ -61,6 +61,7 @@
#include "liquivision_lynx.h"
#include "sporasub_sp2.h"
#include "deepsix_excursion.h"
+#include "seac_screen.h"
#include "device-private.h"
#include "context-private.h"
@@ -227,6 +228,9 @@ dc_device_open (dc_device_t **out, dc_context_t *context, dc_descriptor_t *descr
case DC_FAMILY_DEEPSIX_EXCURSION:
rc = deepsix_excursion_device_open (&device, context, iostream);
break;
+ case DC_FAMILY_SEAC_SCREEN:
+ rc = seac_screen_device_open (&device, context, iostream);
+ break;
default:
return DC_STATUS_INVALIDARGS;
}
diff --git a/src/parser.c b/src/parser.c
index 9a0f71c..22833e2 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -61,6 +61,7 @@
#include "liquivision_lynx.h"
#include "sporasub_sp2.h"
#include "deepsix_excursion.h"
+#include "seac_screen.h"
#include "context-private.h"
#include "parser-private.h"
@@ -188,6 +189,9 @@ dc_parser_new_internal (dc_parser_t **out, dc_context_t *context, dc_family_t fa
case DC_FAMILY_DEEPSIX_EXCURSION:
rc = deepsix_excursion_parser_create (&parser, context);
break;
+ case DC_FAMILY_SEAC_SCREEN:
+ rc = seac_screen_parser_create (&parser, context);
+ break;
default:
return DC_STATUS_INVALIDARGS;
}
diff --git a/src/seac_screen.c b/src/seac_screen.c
new file mode 100644
index 0000000..e9b5366
--- /dev/null
+++ b/src/seac_screen.c
@@ -0,0 +1,604 @@
+/*
+ * libdivecomputer
+ *
+ * Copyright (C) 2022 Jef Driesen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include // memcmp, memcpy
+#include // malloc, free
+
+#include "seac_screen.h"
+#include "context-private.h"
+#include "device-private.h"
+#include "ringbuffer.h"
+#include "rbstream.h"
+#include "checksum.h"
+#include "array.h"
+
+#define ISINSTANCE(device) dc_device_isinstance((device), &seac_screen_device_vtable)
+
+#define MAXRETRIES 4
+
+#define SZ_MAXCMD 8
+#define SZ_MAXRSP SZ_READ
+
+#define CMD_HWINFO 0x1833
+#define CMD_SWINFO 0x1834
+#define CMD_RANGE 0x1840
+#define CMD_ADDRESS 0x1841
+#define CMD_READ 0x1842
+
+#define SZ_HWINFO 256
+#define SZ_SWINFO 256
+#define SZ_RANGE 8
+#define SZ_ADDRESS 4
+#define SZ_READ 2048
+
+#define SZ_HEADER 128
+#define SZ_SAMPLE 64
+
+#define FP_OFFSET 0x0A
+#define FP_SIZE 7
+
+#define RB_PROFILE_BEGIN 0x010000
+#define RB_PROFILE_END 0x200000
+#define RB_PROFILE_SIZE (RB_PROFILE_END - RB_PROFILE_BEGIN)
+#define RB_PROFILE_DISTANCE(a,b) ringbuffer_distance (a, b, 1, RB_PROFILE_BEGIN, RB_PROFILE_END)
+#define RB_PROFILE_INCR(a,d) ringbuffer_increment (a, d, RB_PROFILE_BEGIN, RB_PROFILE_END)
+
+typedef struct seac_screen_device_t {
+ dc_device_t base;
+ dc_iostream_t *iostream;
+ unsigned char info[SZ_HWINFO + SZ_SWINFO];
+ unsigned char fingerprint[FP_SIZE];
+} seac_screen_device_t;
+
+typedef struct seac_screen_logbook_t {
+ unsigned int address;
+ unsigned char header[SZ_HEADER];
+} seac_screen_logbook_t;
+
+static dc_status_t seac_screen_device_set_fingerprint (dc_device_t *abstract, const unsigned char data[], unsigned int size);
+static dc_status_t seac_screen_device_read (dc_device_t *abstract, unsigned int address, unsigned char data[], unsigned int size);
+static dc_status_t seac_screen_device_dump (dc_device_t *abstract, dc_buffer_t *buffer);
+static dc_status_t seac_screen_device_foreach (dc_device_t *abstract, dc_dive_callback_t callback, void *userdata);
+
+static const dc_device_vtable_t seac_screen_device_vtable = {
+ sizeof(seac_screen_device_t),
+ DC_FAMILY_SEAC_SCREEN,
+ seac_screen_device_set_fingerprint, /* set_fingerprint */
+ seac_screen_device_read, /* read */
+ NULL, /* write */
+ seac_screen_device_dump, /* dump */
+ seac_screen_device_foreach, /* foreach */
+ NULL, /* timesync */
+ NULL, /* close */
+};
+
+static dc_status_t
+seac_screen_send (seac_screen_device_t *device, unsigned short cmd, const unsigned char data[], size_t size)
+{
+ dc_status_t status = DC_STATUS_SUCCESS;
+ dc_device_t *abstract = (dc_device_t *) device;
+ unsigned short crc = 0;
+
+ if (device_is_cancelled (abstract))
+ return DC_STATUS_CANCELLED;
+
+ if (size > SZ_MAXCMD)
+ return DC_STATUS_INVALIDARGS;
+
+ // Setup the data packet
+ unsigned len = size + 6;
+ unsigned char packet[SZ_MAXCMD + 7] = {
+ 0x55,
+ (len >> 8) & 0xFF,
+ (len ) & 0xFF,
+ (cmd >> 8) & 0xFF,
+ (cmd ) & 0xFF,
+ };
+ if (size) {
+ memcpy (packet + 5, data, size);
+ }
+ crc = checksum_crc16_ccitt (packet, size + 5, 0xFFFF);
+ packet[size + 5] = (crc >> 8) & 0xFF;
+ packet[size + 6] = (crc ) & 0xFF;
+
+ // Send the data packet.
+ status = dc_iostream_write (device->iostream, packet, size + 7, NULL);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to send the command.");
+ return status;
+ }
+
+ return DC_STATUS_SUCCESS;
+}
+
+static dc_status_t
+seac_screen_receive (seac_screen_device_t *device, unsigned short cmd, unsigned char data[], size_t size)
+{
+ dc_status_t status = DC_STATUS_SUCCESS;
+ dc_device_t *abstract = (dc_device_t *) device;
+ unsigned char packet[SZ_MAXRSP + 8] = {0};
+
+ // Read the packet header.
+ status = dc_iostream_read (device->iostream, packet, 3, NULL);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to receive the packet header.");
+ return status;
+ }
+
+ // Verify the start byte.
+ if (packet[0] != 0x55) {
+ ERROR (abstract->context, "Unexpected start byte (%02x).", packet[0]);
+ return DC_STATUS_PROTOCOL;
+ }
+
+ // Verify the length.
+ unsigned int length = array_uint16_be (packet + 1);
+ if (length < 7 || length + 1 > sizeof(packet)) {
+ ERROR (abstract->context, "Unexpected packet length (%u).", length);
+ return DC_STATUS_PROTOCOL;
+ }
+
+ // Read the packet payload.
+ status = dc_iostream_read (device->iostream, packet + 3, length - 2, NULL);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to receive the packet payload.");
+ return status;
+ }
+
+ // Verify the checksum.
+ unsigned short crc = array_uint16_be (packet + 1 + length - 2);
+ unsigned short ccrc = checksum_crc16_ccitt (packet, 1 + length - 2, 0xFFFF);
+ if (crc != ccrc) {
+ ERROR (abstract->context, "Unexpected packet checksum (%04x %04x).", crc, ccrc);
+ return DC_STATUS_PROTOCOL;
+ }
+
+ // Verify the command response.
+ unsigned int rsp = array_uint16_be (packet + 3);
+ unsigned int misc = packet[1 + length - 3];
+ if (rsp != cmd || misc != 0x09) {
+ ERROR (abstract->context, "Unexpected command response (%04x %02x).", rsp, misc);
+ return DC_STATUS_PROTOCOL;
+ }
+
+ if (length - 7 != size) {
+ ERROR (abstract->context, "Unexpected packet length (%u).", length);
+ return DC_STATUS_PROTOCOL;
+ }
+
+ memcpy (data, packet + 5, length - 7);
+
+ return DC_STATUS_SUCCESS;
+}
+
+static dc_status_t
+seac_screen_packet (seac_screen_device_t *device, unsigned int cmd, const unsigned char data[], unsigned int size, unsigned char answer[], unsigned int asize)
+{
+ dc_status_t status = DC_STATUS_SUCCESS;
+ dc_device_t *abstract = (dc_device_t *) device;
+
+ status = seac_screen_send (device, cmd, data, size);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to send the command.");
+ return status;
+ }
+
+ status = seac_screen_receive (device, cmd, answer, asize);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to receive the response.");
+ return status;
+ }
+
+ return status;
+}
+
+static dc_status_t
+seac_screen_transfer (seac_screen_device_t *device, unsigned int cmd, const unsigned char data[], unsigned int size, unsigned char answer[], unsigned int asize)
+{
+ unsigned int nretries = 0;
+ dc_status_t rc = DC_STATUS_SUCCESS;
+ while ((rc = seac_screen_packet (device, cmd, data, size, answer, asize)) != DC_STATUS_SUCCESS) {
+ // Automatically discard a corrupted packet,
+ // and request a new one.
+ if (rc != DC_STATUS_PROTOCOL && rc != DC_STATUS_TIMEOUT)
+ return rc;
+
+ // Abort if the maximum number of retries is reached.
+ if (nretries++ >= MAXRETRIES)
+ return rc;
+
+ // Discard any garbage bytes.
+ dc_iostream_sleep (device->iostream, 100);
+ dc_iostream_purge (device->iostream, DC_DIRECTION_INPUT);
+ }
+
+ return DC_STATUS_SUCCESS;
+}
+
+dc_status_t
+seac_screen_device_open (dc_device_t **out, dc_context_t *context, dc_iostream_t *iostream)
+{
+ dc_status_t status = DC_STATUS_SUCCESS;
+ seac_screen_device_t *device = NULL;
+
+ if (out == NULL)
+ return DC_STATUS_INVALIDARGS;
+
+ // Allocate memory.
+ device = (seac_screen_device_t *) dc_device_allocate (context, &seac_screen_device_vtable);
+ if (device == NULL) {
+ ERROR (context, "Failed to allocate memory.");
+ return DC_STATUS_NOMEMORY;
+ }
+
+ // Set the default values.
+ device->iostream = iostream;
+ memset (device->fingerprint, 0, sizeof (device->fingerprint));
+
+ // Set the serial communication protocol (115200 8N1).
+ status = dc_iostream_configure (device->iostream, 115200, 8, DC_PARITY_NONE, DC_STOPBITS_ONE, DC_FLOWCONTROL_NONE);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (context, "Failed to set the terminal attributes.");
+ goto error_free;
+ }
+
+ // Set the timeout for receiving data (1000ms).
+ status = dc_iostream_set_timeout (device->iostream, 1000);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (context, "Failed to set the timeout.");
+ goto error_free;
+ }
+
+ // Make sure everything is in a sane state.
+ dc_iostream_sleep (device->iostream, 100);
+ dc_iostream_purge (device->iostream, DC_DIRECTION_ALL);
+
+ // Wakeup the device.
+ const unsigned char init[] = {0x61};
+ dc_iostream_write (device->iostream, init, sizeof (init), NULL);
+
+ // Read the hardware info.
+ status = seac_screen_transfer (device, CMD_HWINFO, NULL, 0, device->info, SZ_HWINFO);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (context, "Failed to read the hardware info.");
+ goto error_free;
+ }
+
+ // Read the software info.
+ status = seac_screen_transfer (device, CMD_SWINFO, NULL, 0, device->info + SZ_HWINFO, SZ_SWINFO);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (context, "Failed to read the software info.");
+ goto error_free;
+ }
+
+ *out = (dc_device_t *) device;
+
+ return DC_STATUS_SUCCESS;
+
+error_free:
+ dc_device_deallocate ((dc_device_t *) device);
+ return status;
+}
+
+static dc_status_t
+seac_screen_device_set_fingerprint (dc_device_t *abstract, const unsigned char data[], unsigned int size)
+{
+ seac_screen_device_t *device = (seac_screen_device_t *) abstract;
+
+ if (size && size != sizeof (device->fingerprint))
+ return DC_STATUS_INVALIDARGS;
+
+ if (size)
+ memcpy (device->fingerprint, data, sizeof (device->fingerprint));
+ else
+ memset (device->fingerprint, 0, sizeof (device->fingerprint));
+
+ return DC_STATUS_SUCCESS;
+}
+
+static dc_status_t
+seac_screen_device_read (dc_device_t *abstract, unsigned int address, unsigned char data[], unsigned int size)
+{
+ dc_status_t status = DC_STATUS_SUCCESS;
+ seac_screen_device_t *device = (seac_screen_device_t *) abstract;
+
+ unsigned int nbytes = 0;
+ while (nbytes < size) {
+ // Maximum payload size.
+ unsigned int len = size - nbytes;
+ if (len > SZ_READ)
+ len = SZ_READ;
+
+ // Read the data packet.
+ // Regardless of the requested payload size, the packet size is always
+ // the maximum size. The remainder of the packet is padded with zeros.
+ const unsigned char params[] = {
+ (address >> 24) & 0xFF,
+ (address >> 16) & 0xFF,
+ (address >> 8) & 0xFF,
+ (address ) & 0xFF,
+ (len >> 24) & 0xFF,
+ (len >> 16) & 0xFF,
+ (len >> 8) & 0xFF,
+ (len ) & 0xFF,
+ };
+ unsigned char packet[SZ_READ] = {0};
+ status = seac_screen_transfer (device, CMD_READ, params, sizeof(params), packet, sizeof(packet));
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to send the read command.");
+ return status;
+ }
+
+ // Copy only the payload bytes.
+ memcpy (data, packet, len);
+
+ nbytes += len;
+ address += len;
+ data += len;
+ }
+
+ return status;
+}
+
+static dc_status_t
+seac_screen_device_dump (dc_device_t *abstract, dc_buffer_t *buffer)
+{
+ seac_screen_device_t *device = (seac_screen_device_t *) abstract;
+
+ // Emit a device info event.
+ dc_event_devinfo_t devinfo;
+ devinfo.model = 0;
+ devinfo.firmware = array_uint32_le (device->info + 0x11C);
+ devinfo.serial = array_uint32_le (device->info + 0x10);
+ device_event_emit (abstract, DC_EVENT_DEVINFO, &devinfo);
+
+ // Emit a vendor event.
+ dc_event_vendor_t vendor;
+ vendor.data = device->info;
+ vendor.size = sizeof(device->info);
+ device_event_emit (abstract, DC_EVENT_VENDOR, &vendor);
+
+ // Allocate the required amount of memory.
+ if (!dc_buffer_resize (buffer, RB_PROFILE_SIZE)) {
+ ERROR (abstract->context, "Insufficient buffer space available.");
+ return DC_STATUS_NOMEMORY;
+ }
+
+ return device_dump_read (abstract, RB_PROFILE_BEGIN, dc_buffer_get_data (buffer),
+ dc_buffer_get_size (buffer), SZ_READ);
+}
+
+static dc_status_t
+seac_screen_device_foreach (dc_device_t *abstract, dc_dive_callback_t callback, void *userdata)
+{
+ dc_status_t status = DC_STATUS_SUCCESS;
+ seac_screen_device_t *device = (seac_screen_device_t *) abstract;
+
+ // Enable progress notifications.
+ dc_event_progress_t progress = EVENT_PROGRESS_INITIALIZER;
+ progress.maximum = RB_PROFILE_SIZE;
+ device_event_emit (abstract, DC_EVENT_PROGRESS, &progress);
+
+ // Emit a device info event.
+ dc_event_devinfo_t devinfo;
+ devinfo.model = 0;
+ devinfo.firmware = array_uint32_le (device->info + 0x11C);
+ devinfo.serial = array_uint32_le (device->info + 0x010);
+ device_event_emit (abstract, DC_EVENT_DEVINFO, &devinfo);
+
+ // Emit a vendor event.
+ dc_event_vendor_t vendor;
+ vendor.data = device->info;
+ vendor.size = sizeof(device->info);
+ device_event_emit (abstract, DC_EVENT_VENDOR, &vendor);
+
+ // Read the range of the available dive numbers.
+ unsigned char range[SZ_RANGE] = {0};
+ status = seac_screen_transfer (device, CMD_RANGE, NULL, 0, range, sizeof(range));
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to send the range command.");
+ goto error_exit;
+ }
+
+ // Extract the first and last dive number.
+ unsigned int first = array_uint32_be (range + 0);
+ unsigned int last = array_uint32_be (range + 4);
+ if (first > last) {
+ ERROR (abstract->context, "Invalid dive numbers (%u %u).", first, last);
+ status = DC_STATUS_DATAFORMAT;
+ goto error_exit;
+ }
+
+ // Calculate the number of dives.
+ unsigned int ndives = last - first + 1;
+
+ // Update and emit a progress event.
+ progress.current += SZ_RANGE;
+ progress.maximum += SZ_RANGE + ndives * (SZ_ADDRESS + SZ_HEADER);
+ device_event_emit (abstract, DC_EVENT_PROGRESS, &progress);
+
+ // Allocate memory for the logbook data.
+ seac_screen_logbook_t *logbook = (seac_screen_logbook_t *) malloc (ndives * sizeof (seac_screen_logbook_t));
+ if (logbook == NULL) {
+ status = DC_STATUS_NOMEMORY;
+ goto error_exit;
+ }
+
+ // Read the header of each dive in reverse order (most recent first).
+ unsigned int eop = 0;
+ unsigned int previous = 0;
+ unsigned int count = 0;
+ unsigned int skip = 0;
+ unsigned int rb_profile_size = 0;
+ unsigned int remaining = RB_PROFILE_SIZE;
+ for (unsigned int i = 0; i < ndives; ++i) {
+ unsigned int number = last - i;
+
+ // Read the dive address.
+ const unsigned char cmd_address[] = {
+ (number >> 24) & 0xFF,
+ (number >> 16) & 0xFF,
+ (number >> 8) & 0xFF,
+ (number ) & 0xFF,
+ };
+ unsigned char rsp_address[SZ_ADDRESS] = {0};
+ status = seac_screen_transfer (device, CMD_ADDRESS, cmd_address, sizeof(cmd_address), rsp_address, sizeof(rsp_address));
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to read the dive address.");
+ goto error_free_logbook;
+ }
+
+ // Get the dive address.
+ logbook[i].address = array_uint32_be (rsp_address);
+ if (logbook[i].address < RB_PROFILE_BEGIN || logbook[i].address >= RB_PROFILE_END) {
+ ERROR (abstract->context, "Invalid ringbuffer pointer (0x%08x).", logbook[i].address);
+ status = DC_STATUS_DATAFORMAT;
+ goto error_free_logbook;
+ }
+
+ // Read the dive header.
+ status = seac_screen_device_read (abstract, logbook[i].address, logbook[i].header, SZ_HEADER);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to read the dive header.");
+ goto error_free_logbook;
+ }
+
+ // Update and emit a progress event.
+ progress.current += SZ_ADDRESS + SZ_HEADER;
+ device_event_emit (abstract, DC_EVENT_PROGRESS, &progress);
+
+ // Check the header checksums.
+ if (checksum_crc16_ccitt (logbook[i].header, SZ_HEADER / 2, 0xFFFF) != 0 ||
+ checksum_crc16_ccitt (logbook[i].header + SZ_HEADER / 2, SZ_HEADER / 2, 0xFFFF) != 0) {
+ ERROR (abstract->context, "Unexpected header checksum.");
+ status = DC_STATUS_DATAFORMAT;
+ goto error_free_logbook;
+ }
+
+ // Check the fingerprint.
+ if (memcmp (logbook[i].header + FP_OFFSET, device->fingerprint, sizeof (device->fingerprint)) == 0) {
+ skip = 1;
+ break;
+ }
+
+ // Get the number of samples.
+ unsigned int nsamples = array_uint32_le (logbook[i].header + 0x44);
+ unsigned int nbytes = SZ_HEADER + nsamples * SZ_SAMPLE;
+
+ // Get the end-of-profile pointer.
+ if (eop == 0) {
+ eop = previous = RB_PROFILE_INCR (logbook[i].address, nbytes);
+ }
+
+ // Calculate the length.
+ unsigned int length = RB_PROFILE_DISTANCE (logbook[i].address, previous);
+
+ // Check for the end of the ringbuffer.
+ if (length > remaining) {
+ WARNING (abstract->context, "Reached the end of the ringbuffer.");
+ skip = 1;
+ break;
+ }
+
+ // Update the total profile size.
+ rb_profile_size += length;
+
+ // Move to the start of the current dive.
+ remaining -= length;
+ previous = logbook[i].address;
+ count++;
+ }
+
+ // Update and emit a progress event.
+ progress.maximum -= (ndives - count - skip) * (SZ_ADDRESS + SZ_HEADER) +
+ (RB_PROFILE_SIZE - rb_profile_size);
+ device_event_emit (abstract, DC_EVENT_PROGRESS, &progress);
+
+ // Exit if no dives to download.
+ if (count == 0) {
+ goto error_free_logbook;
+ }
+
+ // Allocate memory for the profile data.
+ unsigned char *profile = (unsigned char *) malloc (rb_profile_size);
+ if (profile == NULL) {
+ status = DC_STATUS_NOMEMORY;
+ goto error_free_logbook;
+ }
+
+ // Create the ringbuffer stream.
+ dc_rbstream_t *rbstream = NULL;
+ status = dc_rbstream_new (&rbstream, abstract, SZ_READ, SZ_READ, RB_PROFILE_BEGIN, RB_PROFILE_END, eop);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to create the ringbuffer stream.");
+ goto error_free_profile;
+ }
+
+ previous = eop;
+ unsigned int offset = rb_profile_size;
+ for (unsigned int i = 0; i < count; ++i) {
+ // Calculate the length.
+ unsigned int length = RB_PROFILE_DISTANCE (logbook[i].address, previous);
+
+ // Move to the start of the current dive.
+ offset -= length;
+ previous = logbook[i].address;
+
+ // Read the dive.
+ status = dc_rbstream_read (rbstream, &progress, profile + offset, length);
+ if (status != DC_STATUS_SUCCESS) {
+ ERROR (abstract->context, "Failed to read the dive.");
+ goto error_free_rbstream;
+ }
+
+ // Check the dive header.
+ if (memcmp (profile + offset, logbook[i].header, SZ_HEADER) != 0) {
+ ERROR (abstract->context, "Unexpected dive header.");
+ status = DC_STATUS_DATAFORMAT;
+ goto error_free_rbstream;
+ }
+
+ // Get the number of samples.
+ // The actual size of the dive, based on the number of samples, can
+ // sometimes be smaller than the maximum length. In that case, the
+ // remainder of the data is padded with 0xFF bytes.
+ unsigned int nsamples = array_uint32_le (logbook[i].header + 0x44);
+ unsigned int nbytes = SZ_HEADER + nsamples * SZ_SAMPLE;
+ if (nbytes > length) {
+ ERROR (abstract->context, "Unexpected dive length (%u %u).", nbytes, length);
+ status = DC_STATUS_DATAFORMAT;
+ goto error_free_rbstream;
+ }
+
+ if (callback && !callback (profile + offset, nbytes, profile + offset + FP_OFFSET, sizeof(device->fingerprint), userdata)) {
+ break;
+ }
+ }
+
+error_free_rbstream:
+ dc_rbstream_free (rbstream);
+error_free_profile:
+ free (profile);
+error_free_logbook:
+ free (logbook);
+error_exit:
+ return status;
+}
diff --git a/src/seac_screen.h b/src/seac_screen.h
new file mode 100644
index 0000000..64c15b6
--- /dev/null
+++ b/src/seac_screen.h
@@ -0,0 +1,43 @@
+/*
+ * libdivecomputer
+ *
+ * Copyright (C) 2022 Jef Driesen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef SEAC_SCREEN_H
+#define SEAC_SCREEN_H
+
+#include
+#include
+#include
+#include
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+dc_status_t
+seac_screen_device_open (dc_device_t **device, dc_context_t *context, dc_iostream_t *iostream);
+
+dc_status_t
+seac_screen_parser_create (dc_parser_t **parser, dc_context_t *context);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* SEAC_SCREEN_H */
diff --git a/src/seac_screen_parser.c b/src/seac_screen_parser.c
new file mode 100644
index 0000000..28988e4
--- /dev/null
+++ b/src/seac_screen_parser.c
@@ -0,0 +1,376 @@
+/*
+ * libdivecomputer
+ *
+ * Copyright (C) 2022 Jef Driesen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include
+
+#include "seac_screen.h"
+#include "context-private.h"
+#include "parser-private.h"
+#include "checksum.h"
+#include "array.h"
+
+#define ISINSTANCE(parser) dc_device_isinstance((parser), &seac_screen_parser_vtable)
+
+#define SZ_HEADER 128
+#define SZ_SAMPLE 64
+
+#define NGASMIXES 2
+
+#define INVALID 0xFFFFFFFF
+
+typedef struct seac_screen_parser_t seac_screen_parser_t;
+
+struct seac_screen_parser_t {
+ dc_parser_t base;
+ // Cached fields.
+ unsigned int cached;
+ unsigned int ngasmixes;
+ unsigned int oxygen[NGASMIXES];
+};
+
+static dc_status_t seac_screen_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size);
+static dc_status_t seac_screen_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime);
+static dc_status_t seac_screen_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsigned int flags, void *value);
+static dc_status_t seac_screen_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata);
+
+static const dc_parser_vtable_t seac_screen_parser_vtable = {
+ sizeof(seac_screen_parser_t),
+ DC_FAMILY_SEAC_SCREEN,
+ seac_screen_parser_set_data, /* set_data */
+ seac_screen_parser_get_datetime, /* datetime */
+ seac_screen_parser_get_field, /* fields */
+ seac_screen_parser_samples_foreach, /* samples_foreach */
+ NULL /* destroy */
+};
+
+dc_status_t
+seac_screen_parser_create (dc_parser_t **out, dc_context_t *context)
+{
+ seac_screen_parser_t *parser = NULL;
+
+ if (out == NULL)
+ return DC_STATUS_INVALIDARGS;
+
+ // Allocate memory.
+ parser = (seac_screen_parser_t *) dc_parser_allocate (context, &seac_screen_parser_vtable);
+ if (parser == NULL) {
+ ERROR (context, "Failed to allocate memory.");
+ return DC_STATUS_NOMEMORY;
+ }
+
+ // Set the default values.
+ parser->cached = 0;
+ parser->ngasmixes = 0;
+ for (unsigned int i = 0; i < NGASMIXES; ++i) {
+ parser->oxygen[i] = 0;
+ }
+
+ *out = (dc_parser_t *) parser;
+
+ return DC_STATUS_SUCCESS;
+}
+
+static dc_status_t
+seac_screen_parser_set_data (dc_parser_t *abstract, const unsigned char *data, unsigned int size)
+{
+ seac_screen_parser_t *parser = (seac_screen_parser_t *)abstract;
+
+ // Reset the cache.
+ parser->cached = 0;
+ parser->ngasmixes = 0;
+ for (unsigned int i = 0; i < NGASMIXES; ++i) {
+ parser->oxygen[i] = 0;
+ }
+
+ return DC_STATUS_SUCCESS;
+}
+
+static dc_status_t
+seac_screen_parser_get_datetime (dc_parser_t *abstract, dc_datetime_t *datetime)
+{
+ const unsigned char *data = abstract->data;
+
+ static const signed int tz_array[] = {
+ -12 * 60, /* UTC-12 */
+ -11 * 60, /* UTC-11 */
+ -10 * 60, /* UTC-10 */
+ -9 * 60 - 30, /* UTC-9:30 */
+ -9 * 60, /* UTC-9 */
+ -8 * 60, /* UTC-8 */
+ -7 * 60, /* UTC-7 */
+ -6 * 60, /* UTC-6 */
+ -5 * 60, /* UTC-5 */
+ -4 * 60 - 30, /* UTC-4:30 */
+ -4 * 60, /* UTC-4 */
+ -3 * 60 - 30, /* UTC-3:30 */
+ -3 * 60, /* UTC-3 */
+ -2 * 60, /* UTC-2 */
+ -1 * 60, /* UTC-1 */
+ 0 * 60, /* UTC */
+ 1 * 60, /* UTC+1 */
+ 2 * 60, /* UTC+2 */
+ 3 * 60, /* UTC+3 */
+ 3 * 60 + 30, /* UTC+3:30 */
+ 4 * 60, /* UTC+4 */
+ 4 * 60 + 30, /* UTC+4:30 */
+ 5 * 60, /* UTC+5 */
+ 5 * 60 + 30, /* UTC+5:30 */
+ 5 * 60 + 45, /* UTC+5:45 */
+ 6 * 60, /* UTC+6 */
+ 6 * 60 + 30, /* UTC+6:30 */
+ 7 * 60, /* UTC+7 */
+ 8 * 60, /* UTC+8 */
+ 8 * 60 + 45, /* UTC+8:45 */
+ 9 * 60, /* UTC+9 */
+ 9 * 60 + 30, /* UTC+9:30 */
+ 9 * 60 + 45, /* UTC+9:45 */
+ 10 * 60, /* UTC+10 */
+ 10 * 60 + 30, /* UTC+10:30 */
+ 11 * 60, /* UTC+11 */
+ 11 * 60 + 30, /* UTC+11:30 */
+ 12 * 60, /* UTC+12 */
+ 12 * 60 + 45, /* UTC+12:45 */
+ 13 * 60, /* UTC+13 */
+ 13 * 60 + 45, /* UTC+13:45 */
+ 14 * 60, /* UTC+14 */
+ };
+
+ if (abstract->size < SZ_HEADER)
+ return DC_STATUS_DATAFORMAT;
+
+ // The date/time is stored as UTC time with a timezone offset. To convert to
+ // local time, the UTC time is first converted to unix time (seconds since
+ // the epoch), then adjusted for the timezone offset, and finally converted
+ // back into the broken-down time format.
+
+ dc_datetime_t utc = {0};
+ utc.year = data[0x10] + 2000;
+ utc.month = data[0x0F];
+ utc.day = data[0x0E];
+ utc.hour = data[0x0B];
+ utc.minute = data[0x0C];
+ utc.second = data[0x0D];
+ utc.timezone = 0;
+
+ unsigned int tz_idx = data[0x0A];
+ if (tz_idx >= C_ARRAY_SIZE(tz_array)) {
+ ERROR (abstract->context, "Invalid timezone index (%u).", tz_idx);
+ return DC_STATUS_DATAFORMAT;
+ }
+ int timezone = tz_array[tz_idx] * 60;
+
+ dc_ticks_t ticks = dc_datetime_mktime (&utc);
+ if (ticks == -1)
+ return DC_STATUS_DATAFORMAT;
+
+ ticks += timezone;
+
+ if (!dc_datetime_gmtime (datetime, ticks))
+ return DC_STATUS_DATAFORMAT;
+
+ datetime->timezone = timezone;
+
+ return DC_STATUS_SUCCESS;
+}
+
+static dc_status_t
+seac_screen_parser_get_field (dc_parser_t *abstract, dc_field_type_t type, unsigned int flags, void *value)
+{
+ seac_screen_parser_t *parser = (seac_screen_parser_t *) abstract;
+ const unsigned char *data = abstract->data;
+
+ if (abstract->size < SZ_HEADER)
+ return DC_STATUS_DATAFORMAT;
+
+ if (!parser->cached) {
+ dc_status_t rc = seac_screen_parser_samples_foreach (abstract, NULL, NULL);
+ if (rc != DC_STATUS_SUCCESS)
+ return rc;
+ }
+
+ dc_gasmix_t *gasmix = (dc_gasmix_t *) value;
+
+ if (value) {
+ switch (type) {
+ case DC_FIELD_AVGDEPTH:
+ *((double *) value) = array_uint16_le (data + 0x72) / 100.0;
+ break;
+ case DC_FIELD_MAXDEPTH:
+ *((double *) value) = array_uint16_le (data + 0x62) / 100.0;
+ break;
+ case DC_FIELD_DIVETIME:
+ *((unsigned int *) value) = array_uint32_le (data + 0x64);
+ break;
+ case DC_FIELD_TEMPERATURE_MINIMUM:
+ *((double *) value) = array_uint16_le (data + 0x6A) / 100.0;
+ break;
+ case DC_FIELD_TEMPERATURE_MAXIMUM:
+ *((double *) value) = array_uint16_le (data + 0x68) / 100.0;
+ break;
+ case DC_FIELD_GASMIX_COUNT:
+ *((unsigned int *)value) = parser->ngasmixes;
+ break;
+ case DC_FIELD_GASMIX:
+ gasmix->helium = 0.0;
+ gasmix->oxygen = parser->oxygen[flags] / 100.0;
+ gasmix->nitrogen = 1.0 - gasmix->oxygen - gasmix->helium;
+ break;
+ case DC_FIELD_DIVEMODE:
+ switch (data[0x26]) {
+ case 1:
+ *((dc_divemode_t *) value) = DC_DIVEMODE_OC;
+ break;
+ case 2:
+ *((dc_divemode_t *) value) = DC_DIVEMODE_GAUGE;
+ break;
+ case 3:
+ *((dc_divemode_t *) value) = DC_DIVEMODE_FREEDIVE;
+ break;
+ default:
+ ERROR (abstract->context, "Unknown dive mode %i", data[0x26]);
+ return DC_STATUS_DATAFORMAT;
+ }
+ break;
+ default:
+ return DC_STATUS_UNSUPPORTED;
+ }
+ }
+
+ return DC_STATUS_SUCCESS;
+}
+
+static dc_status_t
+seac_screen_parser_samples_foreach (dc_parser_t *abstract, dc_sample_callback_t callback, void *userdata)
+{
+ seac_screen_parser_t *parser = (seac_screen_parser_t *) abstract;
+ const unsigned char *data = abstract->data;
+ unsigned int size = abstract->size;
+
+ if (abstract->size < SZ_HEADER)
+ return DC_STATUS_DATAFORMAT;
+
+ if (checksum_crc16_ccitt (data, SZ_HEADER / 2, 0xFFFF) != 0 ||
+ checksum_crc16_ccitt (data + SZ_HEADER / 2, SZ_HEADER / 2, 0xFFFF) != 0) {
+ ERROR (abstract->context, "Unexpected header checksum.");
+ return DC_STATUS_DATAFORMAT;
+ }
+
+ unsigned int dive_id = array_uint32_le (data + 0x00);
+
+ unsigned int ngasmixes = 0;
+ unsigned int oxygen[NGASMIXES] = {0};
+ unsigned int o2_previous = INVALID;
+
+ unsigned int time = 0;
+ unsigned int offset = SZ_HEADER;
+ while (offset + SZ_SAMPLE <= size) {
+ dc_sample_value_t sample = {0};
+
+ if (checksum_crc16_ccitt (data + offset, SZ_SAMPLE, 0xFFFF) != 0) {
+ ERROR (abstract->context, "Unexpected sample checksum.");
+ return DC_STATUS_DATAFORMAT;
+ }
+
+ unsigned int id = array_uint32_le (data + offset + 0x00);
+ unsigned int timestamp = array_uint32_le (data + offset + 0x04);
+ unsigned int depth = array_uint16_le (data + offset + 0x08);
+ unsigned int temperature = array_uint16_le (data + offset + 0x0A);
+ unsigned int o2 = data[offset + 0x0C];
+ unsigned int decodepth = array_uint16_le (data + offset + 0x0E);
+ unsigned int decotime = array_uint16_le (data + offset + 0x10);
+ unsigned int ndl_tts = array_uint16_le (data + offset + 0x12);
+ unsigned int cns = array_uint16_le (data + offset + 0x16);
+
+ if (id != dive_id) {
+ ERROR (abstract->context, "Unexpected sample id (%u %u).", dive_id, id);
+ return DC_STATUS_DATAFORMAT;
+ }
+
+ // Time (seconds).
+ if (timestamp < time) {
+ ERROR (abstract->context, "Timestamp moved backwards (%u %u).", timestamp, time);
+ return DC_STATUS_DATAFORMAT;
+ }
+ time = timestamp;
+ sample.time = time;
+ if (callback) callback (DC_SAMPLE_TIME, sample, userdata);
+
+ // Depth (1/100 m).
+ sample.depth = depth / 100.0;
+ if (callback) callback (DC_SAMPLE_DEPTH, sample, userdata);
+
+ // Temperature (1/100 °C).
+ sample.temperature = temperature / 100.0;
+ if (callback) callback (DC_SAMPLE_TEMPERATURE, sample, userdata);
+
+ // Gas mix
+ if (o2 != o2_previous) {
+ // Find the gasmix in the list.
+ unsigned int idx = 0;
+ while (idx < ngasmixes) {
+ if (o2 == oxygen[idx])
+ break;
+ idx++;
+ }
+
+ // Add it to list if not found.
+ if (idx >= ngasmixes) {
+ if (idx >= NGASMIXES) {
+ ERROR (abstract->context, "Maximum number of gas mixes reached.");
+ return DC_STATUS_DATAFORMAT;
+ }
+ oxygen[idx] = o2;
+ ngasmixes = idx + 1;
+ }
+
+ sample.gasmix = idx;
+ if (callback) callback(DC_SAMPLE_GASMIX, sample, userdata);
+ o2_previous = o2;
+ }
+
+ // NDL / Deco
+ if (decodepth) {
+ sample.deco.type = DC_DECO_DECOSTOP;
+ sample.deco.time = decotime;
+ sample.deco.depth = decodepth;
+ } else {
+ sample.deco.type = DC_DECO_NDL;
+ sample.deco.time = ndl_tts;
+ sample.deco.depth = 0;
+ }
+ if (callback) callback (DC_SAMPLE_DECO, sample, userdata);
+
+ // CNS
+ sample.cns = cns / 100.0;
+ if (callback) callback (DC_SAMPLE_CNS, sample, userdata);
+
+ offset += SZ_SAMPLE;
+ }
+
+ // Cache the data for later use.
+ for (unsigned int i = 0; i < ngasmixes; ++i) {
+ parser->oxygen[i] = oxygen[i];
+ }
+ parser->ngasmixes = ngasmixes;
+ parser->cached = 1;
+
+ return DC_STATUS_SUCCESS;
+}