480 lines
13 KiB
C
480 lines
13 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> // memcpy
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#include <stdlib.h> // malloc, free
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#include <assert.h> // assert
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#include "device-private.h"
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#include "oceanic_common.h"
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#include "oceanic_atom2.h"
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#include "serial.h"
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#include "utils.h"
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#include "ringbuffer.h"
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#include "checksum.h"
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#define MAXRETRIES 2
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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 ACK 0x5A
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#define NAK 0xA5
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typedef struct oceanic_atom2_device_t {
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oceanic_common_device_t base;
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struct serial *port;
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unsigned char version[PAGESIZE];
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} oceanic_atom2_device_t;
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static device_status_t oceanic_atom2_device_version (device_t *abstract, unsigned char data[], unsigned int size);
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static device_status_t oceanic_atom2_device_read (device_t *abstract, unsigned int address, unsigned char data[], unsigned int size);
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static device_status_t oceanic_atom2_device_write (device_t *abstract, unsigned int address, const unsigned char data[], unsigned int size);
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static device_status_t oceanic_atom2_device_close (device_t *abstract);
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static const device_backend_t oceanic_atom2_device_backend = {
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DEVICE_TYPE_OCEANIC_ATOM2,
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oceanic_common_device_set_fingerprint, /* set_fingerprint */
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oceanic_atom2_device_version, /* version */
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oceanic_atom2_device_read, /* read */
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oceanic_atom2_device_write, /* write */
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oceanic_common_device_dump, /* dump */
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oceanic_common_device_foreach, /* foreach */
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oceanic_atom2_device_close /* close */
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};
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static const unsigned char oceanic_wisdom2_version[] = "WISDOM R\0\0 512K";
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static const unsigned char oceanic_atom2_version[] = "2M ATOM r\0\0 512K";
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static const unsigned char oceanic_oc1_version[] = "OCWATCH R\0\0 1024";
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static const oceanic_common_layout_t oceanic_default_layout = {
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0x10000, /* memsize */
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0x0000, /* cf_devinfo */
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0x0040, /* cf_pointers */
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0x0240, /* rb_logbook_begin */
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0x0A40, /* rb_logbook_end */
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0x0A40, /* rb_profile_begin */
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0x10000, /* rb_profile_end */
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0, /* pt_mode_global */
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0 /* pt_mode_logbook */
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};
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static const oceanic_common_layout_t oceanic_atom2_layout = {
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0xFFF0, /* memsize */
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0x0000, /* cf_devinfo */
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0x0040, /* cf_pointers */
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0x0240, /* rb_logbook_begin */
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0x0A40, /* rb_logbook_end */
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0x0A40, /* rb_profile_begin */
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0xFFF0, /* rb_profile_end */
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0, /* pt_mode_global */
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0 /* pt_mode_logbook */
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};
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static const oceanic_common_layout_t oceanic_oc1_layout = {
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0x20000, /* memsize */
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0x0000, /* cf_devinfo */
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0x0040, /* cf_pointers */
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0x0240, /* rb_logbook_begin */
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0x0A40, /* rb_logbook_end */
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0x0A40, /* rb_profile_begin */
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0x20000, /* rb_profile_end */
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0, /* pt_mode_global */
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1 /* pt_mode_logbook */
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};
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static int
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device_is_oceanic_atom2 (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 == &oceanic_atom2_device_backend;
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}
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static device_status_t
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oceanic_atom2_send (oceanic_atom2_device_t *device, const unsigned char command[], unsigned int csize)
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{
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device_t *abstract = (device_t *) device;
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if (device_is_cancelled (abstract))
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return DEVICE_STATUS_CANCELLED;
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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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// Receive the response (ACK/NAK) of the dive computer.
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unsigned char response = NAK;
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n = serial_read (device->port, &response, 1);
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if (n != 1) {
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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 response of the dive computer.
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if (response != ACK) {
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WARNING ("Unexpected answer start byte(s).");
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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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static device_status_t
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oceanic_atom2_transfer (oceanic_atom2_device_t *device, const unsigned char command[], unsigned int csize, unsigned char answer[], unsigned int asize)
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{
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// Send the command to the device. If the device responds with an
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// ACK byte, the command was received successfully and the answer
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// (if any) follows after the ACK byte. If the device responds with
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// a NAK byte, we try to resend the command a number of times before
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// returning an error.
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unsigned int nretries = 0;
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device_status_t rc = DEVICE_STATUS_SUCCESS;
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while ((rc = oceanic_atom2_send (device, command, csize)) != DEVICE_STATUS_SUCCESS) {
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if (rc != DEVICE_STATUS_TIMEOUT && rc != DEVICE_STATUS_PROTOCOL)
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return rc;
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// Abort if the maximum number of retries is reached.
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if (nretries++ >= MAXRETRIES)
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return rc;
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}
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if (asize) {
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// Receive the answer of the dive computer.
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int 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 checksum of the answer.
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unsigned char crc = answer[asize - 1];
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unsigned char ccrc = checksum_add_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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}
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return DEVICE_STATUS_SUCCESS;
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}
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static device_status_t
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oceanic_atom2_init (oceanic_atom2_device_t *device)
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{
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// Send the command to the dive computer.
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unsigned char command[3] = {0xA8, 0x99, 0x00};
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int n = serial_write (device->port, command, sizeof (command));
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if (n != sizeof (command)) {
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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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// Receive the answer of the dive computer.
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unsigned char answer[1] = {0};
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n = serial_read (device->port, answer, sizeof (answer));
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if (n != sizeof (answer)) {
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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 answer.
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if (answer[0] != NAK) {
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WARNING ("Unexpected answer byte(s).");
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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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static device_status_t
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oceanic_atom2_quit (oceanic_atom2_device_t *device)
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{
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// Send the command to the dive computer.
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unsigned char command[4] = {0x6A, 0x05, 0xA5, 0x00};
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int n = serial_write (device->port, command, sizeof (command));
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if (n != sizeof (command)) {
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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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// Receive the answer of the dive computer.
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unsigned char answer[1] = {0};
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n = serial_read (device->port, answer, sizeof (answer));
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if (n != sizeof (answer)) {
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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 answer.
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if (answer[0] != NAK) {
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WARNING ("Unexpected answer byte(s).");
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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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oceanic_atom2_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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oceanic_atom2_device_t *device = (oceanic_atom2_device_t *) malloc (sizeof (oceanic_atom2_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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oceanic_common_device_init (&device->base, &oceanic_atom2_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 (38400 8N1).
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rc = serial_configure (device->port, 38400, 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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// 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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// Send the init command.
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device_status_t status = oceanic_atom2_init (device);
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if (status != DEVICE_STATUS_SUCCESS) {
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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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// Make sure everything is in a sane state.
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serial_flush (device->port, SERIAL_QUEUE_BOTH);
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// Switch the device from surface mode into download mode. Before sending
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// this command, the device needs to be in PC mode (automatically activated
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// by connecting the device), or already in download mode.
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status = oceanic_atom2_device_version ((device_t *) device, device->version, sizeof (device->version));
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if (status != DEVICE_STATUS_SUCCESS) {
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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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if (oceanic_common_match (oceanic_oc1_version, device->version, sizeof (device->version)))
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device->base.layout = &oceanic_oc1_layout;
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else if (oceanic_common_match (oceanic_atom2_version, device->version, sizeof (device->version)) ||
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oceanic_common_match (oceanic_wisdom2_version, device->version, sizeof (device->version)))
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device->base.layout = &oceanic_atom2_layout;
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else
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device->base.layout = &oceanic_default_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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oceanic_atom2_device_close (device_t *abstract)
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{
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oceanic_atom2_device_t *device = (oceanic_atom2_device_t*) abstract;
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if (! device_is_oceanic_atom2 (abstract))
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return DEVICE_STATUS_TYPE_MISMATCH;
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// Send the quit command.
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oceanic_atom2_quit (device);
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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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device_status_t
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oceanic_atom2_device_keepalive (device_t *abstract)
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{
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oceanic_atom2_device_t *device = (oceanic_atom2_device_t*) abstract;
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if (! device_is_oceanic_atom2 (abstract))
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return DEVICE_STATUS_TYPE_MISMATCH;
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// Send the command to the dive computer.
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unsigned char command[4] = {0x91, 0x05, 0xA5, 0x00};
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device_status_t rc = oceanic_atom2_transfer (device, command, sizeof (command), NULL, 0);
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if (rc != DEVICE_STATUS_SUCCESS)
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return rc;
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return DEVICE_STATUS_SUCCESS;
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}
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static device_status_t
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oceanic_atom2_device_version (device_t *abstract, unsigned char data[], unsigned int size)
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{
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oceanic_atom2_device_t *device = (oceanic_atom2_device_t*) abstract;
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if (! device_is_oceanic_atom2 (abstract))
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return DEVICE_STATUS_TYPE_MISMATCH;
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if (size < PAGESIZE)
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return DEVICE_STATUS_MEMORY;
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unsigned char answer[PAGESIZE + 1] = {0};
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unsigned char command[2] = {0x84, 0x00};
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device_status_t rc = oceanic_atom2_transfer (device, command, sizeof (command), answer, sizeof (answer));
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if (rc != DEVICE_STATUS_SUCCESS)
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return rc;
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memcpy (data, answer, PAGESIZE);
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return DEVICE_STATUS_SUCCESS;
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}
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static device_status_t
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oceanic_atom2_device_read (device_t *abstract, unsigned int address, unsigned char data[], unsigned int size)
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{
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oceanic_atom2_device_t *device = (oceanic_atom2_device_t*) abstract;
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if (! device_is_oceanic_atom2 (abstract))
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return DEVICE_STATUS_TYPE_MISMATCH;
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assert (address % PAGESIZE == 0);
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assert (size % PAGESIZE == 0);
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// The data transmission is split in packages
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// of maximum $PAGESIZE bytes.
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unsigned int nbytes = 0;
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while (nbytes < size) {
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// Read the package.
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unsigned int number = address / PAGESIZE;
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unsigned char answer[PAGESIZE + 1] = {0};
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unsigned char command[4] = {0xB1,
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(number >> 8) & 0xFF, // high
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(number ) & 0xFF, // low
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0};
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device_status_t rc = oceanic_atom2_transfer (device, command, sizeof (command), answer, sizeof (answer));
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if (rc != DEVICE_STATUS_SUCCESS)
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return rc;
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memcpy (data, answer, PAGESIZE);
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nbytes += PAGESIZE;
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address += PAGESIZE;
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data += PAGESIZE;
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}
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return DEVICE_STATUS_SUCCESS;
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}
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static device_status_t
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oceanic_atom2_device_write (device_t *abstract, unsigned int address, const unsigned char data[], unsigned int size)
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{
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oceanic_atom2_device_t *device = (oceanic_atom2_device_t*) abstract;
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if (! device_is_oceanic_atom2 (abstract))
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return DEVICE_STATUS_TYPE_MISMATCH;
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assert (address % PAGESIZE == 0);
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assert (size % PAGESIZE == 0);
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// The data transmission is split in packages
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// of maximum $PAGESIZE bytes.
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unsigned int nbytes = 0;
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while (nbytes < size) {
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// Prepare to write the package.
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unsigned int number = address / PAGESIZE;
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unsigned char prepare[4] = {0xB2,
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(number >> 8) & 0xFF, // high
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(number ) & 0xFF, // low
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0x00};
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device_status_t rc = oceanic_atom2_transfer (device, prepare, sizeof (prepare), NULL, 0);
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if (rc != DEVICE_STATUS_SUCCESS)
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return rc;
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// Write the package.
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unsigned char command[PAGESIZE + 2] = {0};
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memcpy (command, data, PAGESIZE);
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command[PAGESIZE] = checksum_add_uint8 (command, PAGESIZE, 0x00);
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rc = oceanic_atom2_transfer (device, command, sizeof (command), NULL, 0);
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if (rc != DEVICE_STATUS_SUCCESS)
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return rc;
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nbytes += PAGESIZE;
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address += PAGESIZE;
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data += PAGESIZE;
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}
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return DEVICE_STATUS_SUCCESS;
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}
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