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pelagic_i330r.c
646 lines (539 loc) · 19.8 KB
/
pelagic_i330r.c
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/*
* libdivecomputer
*
* Copyright (C) 2023 Janice McLaughlin
*
* 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 <string.h> // memcpy
#include <stdlib.h> // malloc, free
#include <assert.h>
+
#include <libdivecomputer/ble.h>
+
#include "pelagic_i330r.h"
#include "oceanic_common.h"
+
#include "context-private.h"
#include "device-private.h"
#include "ringbuffer.h"
#include "rbstream.h"
#include "checksum.h"
#include "array.h"
+
#define UNDEFINED 0
+
#define STARTBYTE 0xCD
+
#define FLAG_NONE 0x00
#define FLAG_REQUEST 0x40
#define FLAG_DATA 0x80
#define FLAG_LAST 0xC0
+
#define CMD_ACCESS_REQUEST 0xFA
#define CMD_ACCESS_CODE 0xFB
#define CMD_AUTHENTICATION 0x97
#define CMD_WAKEUP_RDONLY 0x21
#define CMD_WAKEUP_RDWR 0x22
#define CMD_READ_HW_CAL 0x27
#define CMD_READ_A2D 0x25
#define CMD_READ_DEVICE_REC 0x31
#define CMD_READ_GEN_SET 0x29
#define CMD_READ_EXFLASHMAP 0x2F
#define CMD_READ_FLASH 0x0D
+
#define RSP_READY 1
#define RSP_DONE 2
+
#define MAXPACKET 255
+
#define MAXPASSCODE 6
+
typedef struct pelagic_i330r_device_t {
oceanic_common_device_t base;
dc_iostream_t *iostream;
unsigned char accesscode[16];
unsigned char id[16];
unsigned char hwcal[256];
unsigned char flashmap[256];
unsigned int model;
} pelagic_i330r_device_t;
+
static dc_status_t pelagic_i330r_device_read (dc_device_t *abstract, unsigned int address, unsigned char data[], unsigned int size);
static dc_status_t pelagic_i330r_device_devinfo (dc_device_t *abstract, dc_event_progress_t *progress);
static dc_status_t pelagic_i330r_device_pointers (dc_device_t *abstract, dc_event_progress_t *progress, unsigned int *rb_logbook_begin, unsigned int *rb_logbook_end, unsigned int *rb_profile_begin, unsigned int *rb_profile_end);
+
static const oceanic_common_device_vtable_t pelagic_i330r_device_vtable = {
{
sizeof(pelagic_i330r_device_t),
DC_FAMILY_PELAGIC_I330R,
oceanic_common_device_set_fingerprint, /* set_fingerprint */
pelagic_i330r_device_read, /* read */
NULL, /* write */
oceanic_common_device_dump, /* dump */
oceanic_common_device_foreach, /* foreach */
NULL, /* timesync */
NULL /* close */
},
pelagic_i330r_device_devinfo,
pelagic_i330r_device_pointers,
oceanic_common_device_logbook,
oceanic_common_device_profile,
};
+
static const oceanic_common_layout_t pelagic_i330r = {
0x00400000, /* memsize */
0, /* highmem */
UNDEFINED, /* cf_devinfo */
UNDEFINED, /* cf_pointers */
0x00102000, /* rb_logbook_begin */
0x00106000, /* rb_logbook_end */
64, /* rb_logbook_entry_size */
0, /* rb_logbook_direction */
0x0010A000, /* rb_profile_begin */
0x00400000, /* rb_profile_end */
1, /* pt_mode_global */
4, /* pt_mode_logbook */
UNDEFINED, /* pt_mode_serial */
};
+
static const oceanic_common_layout_t pelagic_dsx = {
0x02000000, /* memsize */
0, /* highmem */
UNDEFINED, /* cf_devinfo */
UNDEFINED, /* cf_pointers */
0x00800000, /* rb_logbook_begin */
0x00880000, /* rb_logbook_end */
512, /* rb_logbook_entry_size */
1, /* rb_logbook_direction */
0x01000000, /* rb_profile_begin */
0x02000000, /* rb_profile_end */
1, /* pt_mode_global */
4, /* pt_mode_logbook */
UNDEFINED /* pt_mode_serial */
};
+
static unsigned char
checksum (const unsigned char data[], unsigned int size)
{
unsigned int csum = 0;
for (unsigned int i = 0; i < size; i++) {
unsigned int a = csum ^ data[i];
unsigned int b = (a >> 7) ^ ((a >> 4) ^ a);
csum = ((b << 4) & 0xFF) ^ ((b << 1) & 0xFF);
}
return csum & 0xFF;
}
+
static dc_status_t
pelagic_i330r_send (pelagic_i330r_device_t *device, unsigned char cmd, unsigned char flag, const unsigned char data[], unsigned int size)
{
dc_status_t status = DC_STATUS_SUCCESS;
dc_device_t *abstract = (dc_device_t *) device;
+
if (size > MAXPACKET) {
ERROR (abstract->context, "Packet payload is too large (%u).", size);
return DC_STATUS_INVALIDARGS;
}
+
unsigned char packet[MAXPACKET + 5] = {
STARTBYTE,
flag,
cmd,
0,
size
};
if (size) {
memcpy(packet + 5, data, size);
}
packet[3] = checksum (packet, size + 5);
+
// Send the data packet.
status = dc_iostream_write (device->iostream, packet, size + 5, NULL);
if (status != DC_STATUS_SUCCESS) {
ERROR (abstract->context, "Failed to send the command.");
return status;
}
+
return DC_STATUS_SUCCESS;
}
+
static dc_status_t
pelagic_i330r_recv (pelagic_i330r_device_t *device, unsigned char cmd, unsigned char data[], unsigned int size, unsigned int *errorcode)
{
dc_status_t status = DC_STATUS_SUCCESS;
dc_device_t *abstract = (dc_device_t *) device;
unsigned char packet[MAXPACKET + 5] = {0};
unsigned int errcode = 0;
+
unsigned int nbytes = 0;
while (1) {
// Read the data packet.
size_t transferred = 0;
status = dc_iostream_read (device->iostream, packet, sizeof(packet), &transferred);
if (status != DC_STATUS_SUCCESS) {
ERROR (abstract->context, "Failed to receive the data packet.");
return status;
}
+
// Verify the minimum packet size.
if (transferred < 5) {
ERROR (abstract->context, "Invalid packet length (" DC_PRINTF_SIZE ").", transferred);
return DC_STATUS_PROTOCOL;
}
+
// Verify the start byte.
if (packet[0] != STARTBYTE) {
ERROR (abstract->context, "Unexpected packet start byte (%02x).", packet[0]);
return DC_STATUS_PROTOCOL;
}
+
// Verify the command byte.
if (packet[2] != cmd) {
ERROR (abstract->context, "Unexpected packet command byte (%02x).", packet[2]);
return DC_STATUS_PROTOCOL;
}
+
// Verify the length byte.
unsigned int length = packet[4];
if (length + 5 > transferred) {
ERROR (abstract->context, "Invalid packet length (%u).", length);
return DC_STATUS_PROTOCOL;
}
+
// Verify the checksum.
unsigned char crc = packet[3]; packet[3] = 0;
unsigned char ccrc = checksum (packet, length + 5);
if (crc != ccrc) {
ERROR (abstract->context, "Unexpected packet checksum (%02x %02x).", crc, ccrc);
return DC_STATUS_PROTOCOL;
}
+
// Check the flag byte for the last packet.
unsigned char flag = packet[1];
if ((flag & FLAG_LAST) == FLAG_LAST) {
// The last packet (typically 2 bytes) does not get appended!
if (length) {
errcode = packet[5];
}
break;
}
+
// Append the payload data to the output buffer. If the output
// buffer is too small, the error is not reported immediately
// but delayed until all packets have been received.
if (nbytes < size) {
unsigned int n = length;
if (nbytes + n > size) {
n = size - nbytes;
}
memcpy (data + nbytes, packet + 5, n);
}
nbytes += length;
}
+
// Verify the expected number of bytes.
if (nbytes != size) {
ERROR (abstract->context, "Unexpected number of bytes received (%u %u).", nbytes, size);
return DC_STATUS_PROTOCOL;
}
+
if (errorcode) {
*errorcode = errcode;
}
+
return DC_STATUS_SUCCESS;
}
+
static dc_status_t
pelagic_i330r_transfer (pelagic_i330r_device_t *device, unsigned char cmd, unsigned char flag, const unsigned char data[], unsigned int size, unsigned char answer[], unsigned int asize, unsigned int response)
{
dc_status_t status = DC_STATUS_SUCCESS;
dc_device_t *abstract = (dc_device_t *) device;
unsigned int errorcode = 0;
+
status = pelagic_i330r_send (device, cmd, flag, data, size);
if (status != DC_STATUS_SUCCESS)
return status;
+
status = pelagic_i330r_recv (device, cmd, answer, asize, &errorcode);
if (status != DC_STATUS_SUCCESS)
return status;
+
if (errorcode != response) {
ERROR (abstract->context, "Unexpected response code (%u)", errorcode);
return DC_STATUS_PROTOCOL;
}
+
return status;
}
+
static dc_status_t
pelagic_i330r_init_accesscode (pelagic_i330r_device_t *device)
{
dc_status_t status = DC_STATUS_SUCCESS;
+
const unsigned char zero[9] = {0};
status = pelagic_i330r_transfer (device, CMD_ACCESS_REQUEST, FLAG_REQUEST, zero, sizeof(zero), NULL, 0, RSP_READY);
if (status != DC_STATUS_SUCCESS)
return status;
+
status = pelagic_i330r_transfer (device, CMD_ACCESS_REQUEST, FLAG_DATA, device->accesscode, sizeof(device->accesscode), NULL, 0, RSP_DONE);
if (status != DC_STATUS_SUCCESS)
return status;
+
return status;
}
+
static dc_status_t
pelagic_i330r_init_passcode (pelagic_i330r_device_t *device, const char *pincode)
{
dc_status_t status = DC_STATUS_SUCCESS;
dc_device_t *abstract = (dc_device_t *) device;
unsigned char passcode[MAXPASSCODE] = {0};
+
// Check the maximum length.
size_t len = pincode ? strlen (pincode) : 0;
if (len > sizeof(passcode)) {
ERROR (abstract->context, "Invalid pincode length (" DC_PRINTF_SIZE ").", len);
return DC_STATUS_INVALIDARGS;
}
+
// Convert to binary number.
unsigned int offset = sizeof(passcode) - len;
for (unsigned int i = 0; i < len; i++) {
unsigned char c = pincode[i];
if (c < '0' || c > '9') {
ERROR (abstract->context, "Invalid pincode character (%c).", c);
return DC_STATUS_INVALIDARGS;
}
passcode[offset + i] = c - '0';
}
+
const unsigned char zero[9] = {0};
status = pelagic_i330r_transfer (device, CMD_ACCESS_CODE, FLAG_REQUEST, zero, sizeof(zero), NULL, 0, RSP_READY);
if (status != DC_STATUS_SUCCESS)
return status;
+
status = pelagic_i330r_transfer (device, CMD_ACCESS_CODE, FLAG_DATA, passcode, sizeof(passcode), device->accesscode, sizeof(device->accesscode), RSP_DONE);
if (status != DC_STATUS_SUCCESS)
return status;
+
HEXDUMP (abstract->context, DC_LOGLEVEL_DEBUG, "Access code", device->accesscode, sizeof(device->accesscode));
+
return status;
}
+
static dc_status_t
pelagic_i330r_init_handshake (pelagic_i330r_device_t *device, unsigned int readwrite)
{
dc_status_t status = DC_STATUS_SUCCESS;
dc_device_t *abstract = (dc_device_t *) device;
+
const unsigned char cmd = readwrite ? CMD_WAKEUP_RDWR : CMD_WAKEUP_RDONLY;
+
const unsigned char args[9] = {0, 0, 0, 0, 0x0C, 0, 0, 0, 0};
status = pelagic_i330r_transfer (device, cmd, FLAG_REQUEST, args, sizeof(args), device->id, sizeof(device->id), RSP_DONE);
if (status != DC_STATUS_SUCCESS)
return status;
+
HEXDUMP (abstract->context, DC_LOGLEVEL_DEBUG, "ID", device->id, sizeof(device->id));
+
device->model = array_uint16_be (device->id + 12);
+
return status;
}
+
static dc_status_t
pelagic_i330r_init_auth (pelagic_i330r_device_t *device)
{
dc_status_t status = DC_STATUS_SUCCESS;
+
const unsigned char args[2][9] = {
{0xFF, 0xFF, 0xFF, 0xFF}, // DSX
{0x37, 0x30, 0x31, 0x55}, // I330R
};
unsigned int args_idx = device->model == DSX ? 0 : 1;
status = pelagic_i330r_transfer (device, CMD_AUTHENTICATION, FLAG_REQUEST, args[args_idx], sizeof(args[args_idx]), NULL, 0, RSP_READY);
if (status != DC_STATUS_SUCCESS)
return status;
+
return status;
}
+
static dc_status_t
pelagic_i330r_init (pelagic_i330r_device_t *device)
{
dc_status_t status = DC_STATUS_SUCCESS;
dc_device_t *abstract = (dc_device_t *) device;
+
// Get the bluetooth access code.
status = dc_iostream_ioctl (device->iostream, DC_IOCTL_BLE_GET_ACCESSCODE, device->accesscode, sizeof(device->accesscode));
if (status != DC_STATUS_SUCCESS && status != DC_STATUS_UNSUPPORTED) {
ERROR (abstract->context, "Failed to get the access code.");
return status;
}
+
if (array_isequal (device->accesscode, sizeof(device->accesscode), 0)) {
// Request to display the PIN code.
status = pelagic_i330r_init_accesscode (device);
if (status != DC_STATUS_SUCCESS) {
ERROR (abstract->context, "Failed to display the PIN code.");
return status;
}
+
// Get the bluetooth PIN code.
char pincode[6 + 1] = {0};
status = dc_iostream_ioctl (device->iostream, DC_IOCTL_BLE_GET_PINCODE, pincode, sizeof(pincode));
if (status != DC_STATUS_SUCCESS) {
ERROR (abstract->context, "Failed to get the PIN code.");
return status;
}
+
// Force a null terminated string.
pincode[sizeof(pincode) - 1] = 0;
+
// Request the access code.
status = pelagic_i330r_init_passcode (device, pincode);
if (status != DC_STATUS_SUCCESS) {
ERROR (abstract->context, "Failed to request the access code.");
return status;
}
+
// Store the bluetooth access code.
status = dc_iostream_ioctl (device->iostream, DC_IOCTL_BLE_SET_ACCESSCODE, device->accesscode, sizeof(device->accesscode));
if (status != DC_STATUS_SUCCESS && status != DC_STATUS_UNSUPPORTED) {
ERROR (abstract->context, "Failed to store the access code.");
return status;
}
}
+
// Request access.
status = pelagic_i330r_init_accesscode (device);
if (status != DC_STATUS_SUCCESS) {
ERROR (abstract->context, "Failed to request access.");
return status;
}
+
// Send the wakeup command.
status = pelagic_i330r_init_handshake (device, 1);
if (status != DC_STATUS_SUCCESS) {
ERROR (abstract->context, "Failed to send the wakeup command.");
return status;
}
+
// Send the authentication code.
status = pelagic_i330r_init_auth (device);
if (status != DC_STATUS_SUCCESS) {
ERROR (abstract->context, "Failed to send the authentication code.");
return status;
}
+
return status;
}
+
static dc_status_t
pelagic_i330r_download (pelagic_i330r_device_t *device, unsigned char 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 = pelagic_i330r_transfer (device, cmd, FLAG_REQUEST, data, size, answer, asize, RSP_DONE);
if (status != DC_STATUS_SUCCESS)
return status;
+
// Verify the checksum
unsigned short crc = array_uint16_be (answer + asize - 2);
unsigned short ccrc = checksum_crc16_ccitt (answer, asize - 2, 0xffff, 0x0000);
if (crc != ccrc) {
ERROR (abstract->context, "Unexpected data checksum (%04x %04x).", crc, ccrc);
return DC_STATUS_PROTOCOL;
}
+
return status;
}
+
dc_status_t
pelagic_i330r_device_open (dc_device_t **out, dc_context_t *context, dc_iostream_t *iostream, unsigned int model)
{
dc_status_t status = DC_STATUS_SUCCESS;
pelagic_i330r_device_t *device = NULL;
+
if (out == NULL)
return DC_STATUS_INVALIDARGS;
+
// Allocate memory.
device = (pelagic_i330r_device_t *) dc_device_allocate (context, &pelagic_i330r_device_vtable.base);
if (device == NULL) {
ERROR (context, "Failed to allocate memory.");
return DC_STATUS_NOMEMORY;
}
+
// Initialize the base class.
oceanic_common_device_init (&device->base);
+
// Override the base class values.
device->base.multipage = 256;
+
// Set the default values.
device->iostream = iostream;
memset (device->accesscode, 0, sizeof(device->accesscode));
memset (device->id, 0, sizeof(device->id));
memset (device->hwcal, 0, sizeof(device->hwcal));
memset (device->flashmap, 0, sizeof(device->flashmap));
device->model = 0;
+
// Set the timeout for receiving data (3000 ms).
status = dc_iostream_set_timeout (device->iostream, 3000);
if (status != DC_STATUS_SUCCESS) {
ERROR (context, "Failed to set the timeout.");
goto error_free;
}
+
// Perform the bluetooth authentication.
status = pelagic_i330r_init (device);
if (status != DC_STATUS_SUCCESS) {
ERROR (context, "Failed to perform the bluetooth authentication.");
goto error_free;
}
+
// Download the calibration data.
const unsigned char args[9] = {0, 0, 0, 0, 0, 0x01, 0, 0, 0};
status = pelagic_i330r_download (device, CMD_READ_HW_CAL, args, sizeof(args), device->hwcal, sizeof(device->hwcal));
if (status != DC_STATUS_SUCCESS) {
ERROR (context, "Failed to download the calibration data.");
goto error_free;
}
+
HEXDUMP (context, DC_LOGLEVEL_DEBUG, "Hwcal", device->hwcal, sizeof(device->hwcal));
+
// Download the flash map.
const unsigned char zero[9] = {0};
status = pelagic_i330r_download (device, CMD_READ_EXFLASHMAP, zero, sizeof(zero), device->flashmap, sizeof(device->flashmap));
if (status != DC_STATUS_SUCCESS) {
ERROR (context, "Failed to download the flash map.");
goto error_free;
}
+
HEXDUMP (context, DC_LOGLEVEL_DEBUG, "Flashmap", device->flashmap, sizeof(device->flashmap));
+
// Detect the memory layout.
if (device->model == DSX) {
device->base.layout = &pelagic_dsx;
} else {
device->base.layout = &pelagic_i330r;
}
+
*out = (dc_device_t *) device;
+
return DC_STATUS_SUCCESS;
+
error_free:
dc_device_deallocate ((dc_device_t *) device);
return status;
}
+
static dc_status_t
pelagic_i330r_device_read (dc_device_t *abstract, unsigned int address, unsigned char data[], unsigned int size)
{
dc_status_t status = DC_STATUS_SUCCESS;
pelagic_i330r_device_t *device = (pelagic_i330r_device_t*) abstract;
+
unsigned char command[9] = {0};
array_uint32_le_set(command + 0, address);
array_uint32_le_set(command + 4, size);
+
status = pelagic_i330r_transfer (device, CMD_READ_FLASH, FLAG_NONE, command, sizeof(command), data, size, RSP_DONE);
if (status != DC_STATUS_SUCCESS) {
return status;
}
+
return status;
}
+
static dc_status_t
pelagic_i330r_device_devinfo (dc_device_t *abstract, dc_event_progress_t *progress)
{
pelagic_i330r_device_t *device = (pelagic_i330r_device_t *) abstract;
+
assert (device != NULL);
+
// Emit a device info event.
dc_event_devinfo_t devinfo;
devinfo.model = device->model;
devinfo.firmware = 0;
devinfo.serial =
bcd2dec (device->hwcal[12]) +
bcd2dec (device->hwcal[13]) * 100 +
bcd2dec (device->hwcal[14]) * 10000;
device_event_emit (abstract, DC_EVENT_DEVINFO, &devinfo);
+
return DC_STATUS_SUCCESS;
}
+
static dc_status_t
pelagic_i330r_device_pointers (dc_device_t *abstract, dc_event_progress_t *progress, unsigned int *rb_logbook_begin, unsigned int *rb_logbook_end, unsigned int *rb_profile_begin, unsigned int *rb_profile_end)
{
pelagic_i330r_device_t *device = (pelagic_i330r_device_t *) abstract;
+
assert (device != NULL);
assert (device->base.layout != NULL);
assert (rb_logbook_begin != NULL && rb_logbook_end != NULL);
assert (rb_profile_begin != NULL && rb_profile_end != NULL);
+
const oceanic_common_layout_t *layout = device->base.layout;
+
// Get the logbook pointers.
unsigned int rb_logbook_min = array_uint32_le (device->flashmap + 0x50);
unsigned int rb_logbook_max = array_uint32_le (device->flashmap + 0x54);
unsigned int rb_logbook_first = array_uint32_le (device->flashmap + 0x58);
unsigned int rb_logbook_last = array_uint32_le (device->flashmap + 0x5C);
if (rb_logbook_min != 0 && rb_logbook_max != 0) {
rb_logbook_max += 1;
}
+
// Get the profile pointers.
unsigned int rb_profile_min = array_uint32_le (device->flashmap + 0x70);
unsigned int rb_profile_max = array_uint32_le (device->flashmap + 0x74);
unsigned int rb_profile_first = array_uint32_le (device->flashmap + 0x78);
unsigned int rb_profile_last = array_uint32_le (device->flashmap + 0x7C);
if (rb_profile_min != 0 && rb_profile_max != 0) {
rb_profile_max += 1;
}
+
// Check the logbook ringbuffer area.
if (rb_logbook_min != layout->rb_logbook_begin ||
rb_logbook_max != layout->rb_logbook_end) {
ERROR (abstract->context, "Unexpected logbook ringbuffer area (%08x %08x)",
rb_logbook_min, rb_logbook_max);
return DC_STATUS_DATAFORMAT;
}
+
// Check the profile ringbuffer area.
if (rb_profile_min != layout->rb_profile_begin ||
rb_profile_max != layout->rb_profile_end) {
ERROR (abstract->context, "Unexpected profile ringbuffer area (%08x %08x)",
rb_profile_min, rb_profile_max);
return DC_STATUS_DATAFORMAT;
}
+
// Get the begin/end pointers.
if (device->model == DSX) {
*rb_logbook_begin = rb_logbook_first;
*rb_logbook_end = rb_logbook_last;
} else {
*rb_logbook_begin = rb_logbook_min;
*rb_logbook_end = rb_logbook_last + 1;
}
*rb_profile_begin = rb_profile_first;
*rb_profile_end = rb_profile_last;
+
return DC_STATUS_SUCCESS;
}