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Deepblu Cosmiq+: flesh out some of the comments and fingerprint size

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I've tried to find where the firmware version and serial number are, and
have failed miserably.  Some of the commands I have sent instead cleared
the memory of the dive computer.  Whee.

But let's document the responses to the commands anyway, and flesh out
the fingerprinting code (which is useless without a device ID, which we
do not currently have).

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2019-08-27 13:45:34 -07:00
parent d532be187a
commit 2d40cf46b1
1 changed files with 23 additions and 4 deletions
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27
src/deepblu.c
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@ -27,7 +27,7 @@
#include "device-private.h"
#include "array.h"
// "Write state"?
// "Write state"
#define CMD_SETTIME 0x20 // Send 6 byte date-time, get single-byte 00x00 ack
#define CMD_23 0x23 // Send 00/01 byte, get ack back? Some metric/imperial setting?
@ -38,18 +38,33 @@
#define CMD_GETPROFILE 0x43 // Send dive number (1-nr) byte, get dive profile length BE word back
#define RSP_DIVEPROF 0x44 // .. followed by packets of dive profile of that length
// "Read state"?
#define CMD_58 0x58 // Send empty byte, get single byte back ?? (0x52)
// "Read state"
#define CMD_GETTIME 0x50 // Send empty byte, get six-byte bcd date-time back
#define CMD_51 0x51 // Send empty byte, get four bytes back (03 dc 00 e3)
#define CMD_52 0x52 // Send empty byte, get two bytes back (bf 8d)
#define CMD_53 0x53 // Send empty byte, get six bytes back (0e 81 00 03 00 00)
#define CMD_54 0x54 // Send empty byte, get byte back (00)
#define CMD_55 0x55 // Send empty byte, get byte back (00)
#define CMD_56 0x56 // Send empty byte, get byte back (00)
#define CMD_57 0x57 // Send empty byte, get byte back (00)
#define CMD_58 0x58 // Send empty byte, get byte back (52)
#define CMD_59 0x59 // Send empty byte, get six bytes back (00 00 07 00 00 00)
// (00 00 00 00 00 00)
#define CMD_5a 0x5a // Send empty byte, get six bytes back (23 1b 09 d8 37 c0)
#define CMD_5b 0x5b // Send empty byte, get six bytes back (00 21 00 14 00 01)
// (00 00 00 14 00 01)
#define CMD_5c 0x5c // Send empty byte, get six bytes back (13 88 00 46 20 00)
// (13 88 00 3c 15 00)
#define CMD_5d 0x5d // Send empty byte, get six bytes back (19 00 23 0C 02 0E)
// (14 14 14 0c 01 0e)
#define CMD_5f 0x5f // Send empty byte, get six bytes back (00 00 07 00 00 00)
#define COSMIQ_HDR_SIZE 36
typedef struct deepblu_device_t {
dc_device_t base;
dc_iostream_t *iostream;
unsigned char fingerprint[8];
unsigned char fingerprint[COSMIQ_HDR_SIZE];
} deepblu_device_t;
static dc_status_t deepblu_device_set_fingerprint (dc_device_t *abstract, const unsigned char data[], unsigned int size);
@ -413,6 +428,10 @@ deepblu_download_dive(deepblu_device_t *device, unsigned char nr, dc_dive_callba
return status;
memset(header + header_len, 0, 256 - header_len);
/* The header is the fingerprint. If we've already seen this header, we're done */
if (memcmp(header, device->fingerprint, sizeof (device->fingerprint)) == 0)
return DC_STATUS_DONE;
status = deepblu_send_recv(device, CMD_GETPROFILE, &nr, 1, profilebytes, sizeof(profilebytes));
if (status != DC_STATUS_SUCCESS)
return status;