2a0defe30d
The D9tx, D6i and D4i have twice the amount of memory compared to the previous versions (64K versus 32K). To support both variants, a new layout descriptor is introduced.
311 lines
8.3 KiB
C
311 lines
8.3 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2008 Jef Driesen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <string.h> // memcmp, memcpy
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#include <stdlib.h> // malloc, free
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#include <assert.h> // assert
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#include "suunto_common2.h"
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#include "suunto_d9.h"
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#include "serial.h"
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#include "utils.h"
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#include "checksum.h"
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#include "array.h"
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#define EXITCODE(rc) \
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( \
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rc == -1 ? DEVICE_STATUS_IO : DEVICE_STATUS_TIMEOUT \
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)
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#define C_ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a)))
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#define D4i 0x19
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#define D6i 0x1A
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#define D9tx 0x1B
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typedef struct suunto_d9_device_t {
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suunto_common2_device_t base;
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serial_t *port;
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unsigned char version[4];
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} suunto_d9_device_t;
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static device_status_t suunto_d9_device_packet (device_t *abstract, const unsigned char command[], unsigned int csize, unsigned char answer[], unsigned int asize, unsigned int size);
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static device_status_t suunto_d9_device_close (device_t *abstract);
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static const suunto_common2_device_backend_t suunto_d9_device_backend = {
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{
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DEVICE_TYPE_SUUNTO_D9,
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suunto_common2_device_set_fingerprint, /* set_fingerprint */
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suunto_common2_device_version, /* version */
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suunto_common2_device_read, /* read */
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suunto_common2_device_write, /* write */
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suunto_common2_device_dump, /* dump */
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suunto_common2_device_foreach, /* foreach */
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suunto_d9_device_close /* close */
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},
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suunto_d9_device_packet
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};
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static const suunto_common2_layout_t suunto_d9_layout = {
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0x8000, /* memsize */
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0x0023, /* serial */
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0x019A, /* rb_profile_begin */
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0x7FFE /* rb_profile_end */
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};
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static const suunto_common2_layout_t suunto_d9tx_layout = {
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0x10000, /* memsize */
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0x0024, /* serial */
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0x019A, /* rb_profile_begin */
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0xFFFE /* rb_profile_end */
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};
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static int
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device_is_suunto_d9 (device_t *abstract)
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{
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if (abstract == NULL)
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return 0;
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return abstract->backend == (const device_backend_t *) &suunto_d9_device_backend;
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}
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static device_status_t
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suunto_d9_device_autodetect (suunto_d9_device_t *device, unsigned int model)
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{
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device_status_t status = DEVICE_STATUS_SUCCESS;
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// The list with possible baudrates.
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const int baudrates[] = {9600, 115200};
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// Use the model number as a hint to speedup the detection.
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unsigned int hint = 0;
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if (model == D4i || model == D6i || model == D9tx)
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hint = 1;
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for (unsigned int i = 0; i < C_ARRAY_SIZE(baudrates); ++i) {
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// Use the baudrate array as circular array, starting from the hint.
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unsigned int idx = (hint + i) % C_ARRAY_SIZE(baudrates);
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// Adjust the baudrate.
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int rc = serial_configure (device->port, baudrates[idx], 8, SERIAL_PARITY_NONE, 1, SERIAL_FLOWCONTROL_NONE);
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if (rc == -1) {
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WARNING ("Failed to set the terminal attributes.");
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return DEVICE_STATUS_IO;
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}
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// Try reading the version info.
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status = suunto_common2_device_version ((device_t *) device, device->version, sizeof (device->version));
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if (status == DEVICE_STATUS_SUCCESS)
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break;
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}
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return status;
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}
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device_status_t
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suunto_d9_device_open (device_t **out, const char* name)
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{
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if (out == NULL)
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return DEVICE_STATUS_ERROR;
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// Allocate memory.
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suunto_d9_device_t *device = (suunto_d9_device_t *) malloc (sizeof (suunto_d9_device_t));
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if (device == NULL) {
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WARNING ("Failed to allocate memory.");
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return DEVICE_STATUS_MEMORY;
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}
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// Initialize the base class.
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suunto_common2_device_init (&device->base, &suunto_d9_device_backend);
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// Set the default values.
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device->port = NULL;
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memset (device->version, 0, sizeof (device->version));
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// Open the device.
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int rc = serial_open (&device->port, name);
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if (rc == -1) {
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WARNING ("Failed to open the serial port.");
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free (device);
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return DEVICE_STATUS_IO;
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}
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// Set the serial communication protocol (9600 8N1).
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rc = serial_configure (device->port, 9600, 8, SERIAL_PARITY_NONE, 1, SERIAL_FLOWCONTROL_NONE);
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if (rc == -1) {
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WARNING ("Failed to set the terminal attributes.");
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serial_close (device->port);
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free (device);
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return DEVICE_STATUS_IO;
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}
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// Set the timeout for receiving data (3000 ms).
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if (serial_set_timeout (device->port, 3000) == -1) {
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WARNING ("Failed to set the timeout.");
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serial_close (device->port);
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free (device);
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return DEVICE_STATUS_IO;
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}
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// Set the DTR line (power supply for the interface).
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if (serial_set_dtr (device->port, 1) == -1) {
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WARNING ("Failed to set the DTR line.");
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serial_close (device->port);
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free (device);
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return DEVICE_STATUS_IO;
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}
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// Give the interface 100 ms to settle and draw power up.
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serial_sleep (100);
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// Make sure everything is in a sane state.
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serial_flush (device->port, SERIAL_QUEUE_BOTH);
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// Try to autodetect the protocol variant.
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device_status_t status = suunto_d9_device_autodetect (device, 0);
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if (status != DEVICE_STATUS_SUCCESS) {
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WARNING ("Failed to identify the protocol variant.");
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serial_close (device->port);
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free (device);
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return status;
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}
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// Override the base class values.
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unsigned int model = device->version[0];
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if (model == D4i || model == D6i || model == D9tx)
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device->base.layout = &suunto_d9tx_layout;
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else
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device->base.layout = &suunto_d9_layout;
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*out = (device_t*) device;
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return DEVICE_STATUS_SUCCESS;
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}
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static device_status_t
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suunto_d9_device_close (device_t *abstract)
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{
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suunto_d9_device_t *device = (suunto_d9_device_t*) abstract;
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if (! device_is_suunto_d9 (abstract))
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return DEVICE_STATUS_TYPE_MISMATCH;
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// Close the device.
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if (serial_close (device->port) == -1) {
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free (device);
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return DEVICE_STATUS_IO;
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}
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// Free memory.
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free (device);
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return DEVICE_STATUS_SUCCESS;
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}
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static device_status_t
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suunto_d9_device_packet (device_t *abstract, const unsigned char command[], unsigned int csize, unsigned char answer[], unsigned int asize, unsigned int size)
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{
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suunto_d9_device_t *device = (suunto_d9_device_t *) abstract;
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if (device_is_cancelled (abstract))
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return DEVICE_STATUS_CANCELLED;
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// Clear RTS to send the command.
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serial_set_rts (device->port, 0);
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// Send the command to the dive computer.
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int n = serial_write (device->port, command, csize);
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if (n != csize) {
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WARNING ("Failed to send the command.");
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return EXITCODE (n);
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}
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// Wait until all data has been transmitted.
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serial_drain (device->port);
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// Receive the echo.
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unsigned char echo[128] = {0};
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assert (sizeof (echo) >= csize);
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n = serial_read (device->port, echo, csize);
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if (n != csize) {
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WARNING ("Failed to receive the echo.");
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return EXITCODE (n);
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}
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// Verify the echo.
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if (memcmp (command, echo, csize) != 0) {
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WARNING ("Unexpected echo.");
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return DEVICE_STATUS_PROTOCOL;
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}
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// Set RTS to receive the reply.
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serial_set_rts (device->port, 1);
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// Receive the answer of the dive computer.
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n = serial_read (device->port, answer, asize);
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if (n != asize) {
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WARNING ("Failed to receive the answer.");
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return EXITCODE (n);
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}
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// Verify the header of the package.
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if (answer[0] != command[0]) {
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WARNING ("Unexpected answer header.");
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return DEVICE_STATUS_PROTOCOL;
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}
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// Verify the size of the package.
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if (array_uint16_be (answer + 1) + 4 != asize) {
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WARNING ("Unexpected answer size.");
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return DEVICE_STATUS_PROTOCOL;
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}
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// Verify the parameters of the package.
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if (memcmp (command + 3, answer + 3, asize - size - 4) != 0) {
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WARNING ("Unexpected answer parameters.");
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return DEVICE_STATUS_PROTOCOL;
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}
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// Verify the checksum of the package.
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unsigned char crc = answer[asize - 1];
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unsigned char ccrc = checksum_xor_uint8 (answer, asize - 1, 0x00);
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if (crc != ccrc) {
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WARNING ("Unexpected answer CRC.");
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return DEVICE_STATUS_PROTOCOL;
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}
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return DEVICE_STATUS_SUCCESS;
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}
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device_status_t
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suunto_d9_device_reset_maxdepth (device_t *abstract)
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{
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if (! device_is_suunto_d9 (abstract))
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return DEVICE_STATUS_TYPE_MISMATCH;
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return suunto_common2_device_reset_maxdepth (abstract);
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}
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