Added the initial implementation for the Suunto Vyper2.

This commit is contained in:
Jef Driesen 2007-12-19 10:16:00 +00:00
parent 50bc70d89a
commit a63a1e4576
4 changed files with 438 additions and 0 deletions

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#define SUUNTO_ERROR_TIMEOUT -5
#include "suunto_vyper.h"
#include "suunto_vyper2.h"
#endif /* SUUNTO_H */

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suunto_vyper2.c Normal file
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#include <stdio.h> // fprintf
#include <string.h> // memcmp, memcpy
#include <stdlib.h> // malloc, free
#include "suunto.h"
#include "serial.h"
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
#define WARNING(expr) \
{ \
fprintf (stderr, "%s:%d: %s\n", __FILE__, __LINE__, expr); \
}
#define EXITCODE(rc, n) \
( \
rc == -1 ? \
SUUNTO_ERROR_IO : \
(rc != n ? SUUNTO_ERROR_TIMEOUT : SUUNTO_ERROR_PROTOCOL) \
)
struct vyper2 {
struct serial *port;
};
int
suunto_vyper2_open (vyper2 **out, const char* name)
{
if (out == NULL)
return SUUNTO_ERROR;
// Allocate memory.
struct vyper2 *device = malloc (sizeof (struct vyper2));
if (device == NULL) {
WARNING ("Failed to allocate memory.");
return SUUNTO_ERROR_MEMORY;
}
// Set the default values.
device->port = NULL;
// Open the device.
int rc = serial_open (&device->port, name);
if (rc == -1) {
WARNING ("Failed to open the serial port.");
free (device);
return SUUNTO_ERROR_IO;
}
// Set the serial communication protocol (9600 8N1).
rc = serial_configure (device->port, 9600, 8, SERIAL_PARITY_NONE, 1, SERIAL_FLOWCONTROL_NONE);
if (rc == -1) {
WARNING ("Failed to set the terminal attributes.");
serial_close (device->port);
free (device);
return SUUNTO_ERROR_IO;
}
// Set the timeout for receiving data (3000 ms).
if (serial_set_timeout (device->port, 3000) == -1) {
WARNING ("Failed to set the timeout.");
serial_close (device->port);
free (device);
return SUUNTO_ERROR_IO;
}
// Set the DTR line (power supply for the interface).
if (serial_set_dtr (device->port, 1) == -1) {
WARNING ("Failed to set the DTR line.");
serial_close (device->port);
free (device);
return SUUNTO_ERROR_IO;
}
// Give the interface 100 ms to settle and draw power up.
serial_sleep (100);
// Make sure everything is in a sane state.
serial_flush (device->port, SERIAL_QUEUE_BOTH);
*out = device;
return SUUNTO_SUCCESS;
}
int
suunto_vyper2_close (vyper2 *device)
{
if (device == NULL)
return SUUNTO_SUCCESS;
// Close the device.
if (serial_close (device->port) == -1) {
free (device);
return SUUNTO_ERROR_IO;
}
// Free memory.
free (device);
return SUUNTO_SUCCESS;
}
static unsigned char
suunto_vyper2_checksum (const unsigned char data[], unsigned int size, unsigned char init)
{
unsigned char crc = init;
for (unsigned int i = 0; i < size; ++i)
crc ^= data[i];
return crc;
}
static int
suunto_vyper2_send (vyper2 *device, const unsigned char command[], unsigned int csize)
{
serial_sleep (0x190 + 0xC8);
// Set RTS to send the command.
serial_set_rts (device->port, 1);
// Send the command to the dive computer and
// wait until all data has been transmitted.
serial_write (device->port, command, csize);
serial_drain (device->port);
serial_sleep (0x9);
// Clear RTS to receive the reply.
serial_set_rts (device->port, 0);
return SUUNTO_SUCCESS;
}
static int
suunto_vyper2_transfer (vyper2 *device, const unsigned char command[], unsigned int csize, unsigned char header[], unsigned int hsize, unsigned char data[], unsigned int size)
{
// Send the command to the dive computer.
int rc = suunto_vyper2_send (device, command, csize);
if (rc != SUUNTO_SUCCESS) {
WARNING ("Failed to send the command.");
return rc;
}
// Initial checksum value.
unsigned char ccrc = 0x00;
// Receive the header of the package.
rc = serial_read (device->port, header, hsize);
header[2] -= size;
if (rc != hsize || memcmp (command, header, hsize) != 0) {
WARNING ("Unexpected answer start byte(s).");
if (rc == 0) {
WARNING ("Interface present, but the DC does not answer. Check the connection.");
}
return EXITCODE (rc, hsize);
}
header[2] += size;
// Update the checksum.
ccrc = suunto_vyper2_checksum (header, hsize, ccrc);
if (data) {
// Receive the contents of the package.
rc = serial_read (device->port, data, size);
if (rc != size) {
WARNING ("Unexpected EOF in answer.");
return EXITCODE (rc, size);
}
// Update the checksum.
ccrc = suunto_vyper2_checksum (data, size, ccrc);
}
// Receive (and verify) the checksum of the package.
unsigned char crc = 0x00;
rc = serial_read (device->port, &crc, 1);
if (rc != 1 || ccrc != crc) {
WARNING ("Unexpected answer CRC.");
return EXITCODE (rc, 1);
}
return SUUNTO_SUCCESS;
}
int
suunto_vyper2_read_version (vyper2 *device, unsigned char data[], unsigned int size)
{
if (device == NULL)
return SUUNTO_ERROR;
if (size < 4)
return SUUNTO_ERROR_MEMORY;
unsigned char header[3] = {0};
unsigned char command[4] = {0x0F, 0x00, 0x00, 0};
command[3] = suunto_vyper2_checksum (command, 3, 0x00);
int rc = suunto_vyper2_transfer (device, command, 4, header, 3, data, 4);
if (rc != SUUNTO_SUCCESS)
return rc;
#ifndef NDEBUG
printf ("Vyper2ReadVersion()=\"%02x %02x %02x %02x\"\n", data[0], data[1], data[2], data[3]);
#endif
return SUUNTO_SUCCESS;
}
int
suunto_vyper2_reset_maxdepth (vyper2 *device)
{
if (device == NULL)
return SUUNTO_ERROR;
unsigned char header[3] = {0};
unsigned char command[4] = {0x20, 0x00, 0x00, 0};
command[3] = suunto_vyper2_checksum (command, 3, 0x00);
int rc = suunto_vyper2_transfer (device, command, 4, header, 3, NULL, 0);
if (rc != SUUNTO_SUCCESS)
return rc;
#ifndef NDEBUG
printf ("Vyper2ResetMaxDepth()\n");
#endif
return SUUNTO_SUCCESS;
}
int
suunto_vyper2_read_memory (vyper2 *device, unsigned int address, unsigned char data[], unsigned int size)
{
if (device == NULL)
return SUUNTO_ERROR;
// The data transmission is split in packages
// of maximum $SUUNTO_VYPER2_PACKET_SIZE bytes.
unsigned int nbytes = 0;
while (nbytes < size) {
// Calculate the package size.
unsigned int len = MIN (size - nbytes, SUUNTO_VYPER2_PACKET_SIZE);
// Read the package.
unsigned char header[6] = {0};
unsigned char command[7] = {0x05, 0x00, 0x03,
(address >> 8) & 0xFF, // high
(address ) & 0xFF, // low
len, // count
0}; // CRC
command[6] = suunto_vyper2_checksum (command, 6, 0x00);
int rc = suunto_vyper2_transfer (device, command, 7, header, 6, data, len);
if (rc != SUUNTO_SUCCESS)
return rc;
#ifndef NDEBUG
printf ("Vyper2Read(0x%04x,%d)=\"", address, len);
for (unsigned int i = 0; i < len; ++i) {
printf("%02x", data[i]);
}
printf("\"\n");
#endif
nbytes += len;
address += len;
data += len;
}
return SUUNTO_SUCCESS;
}
int
suunto_vyper2_write_memory (vyper2 *device, unsigned int address, const unsigned char data[], unsigned int size)
{
if (device == NULL)
return SUUNTO_ERROR;
// The data transmission is split in packages
// of maximum $SUUNTO_VYPER2_PACKET_SIZE bytes.
unsigned int nbytes = 0;
while (nbytes < size) {
// Calculate the package size.
unsigned int len = MIN (size - nbytes, SUUNTO_VYPER2_PACKET_SIZE);
// Write the package.
unsigned char header[6] = {0};
unsigned char command[SUUNTO_VYPER2_PACKET_SIZE + 7] = {0x06, 0x00, 0x03,
(address >> 8) & 0xFF, // high
(address ) & 0xFF, // low
len, // count
0}; // data + CRC
memcpy (command + 6, data, len);
command[len + 6] = suunto_vyper2_checksum (command, len + 6, 0x00);
int rc = suunto_vyper2_transfer (device, command, len + 7, header, 6, NULL, 0);
if (rc != SUUNTO_SUCCESS)
return rc;
#ifndef NDEBUG
printf ("Vyper2Write(0x%04x,%d,\"", address, len);
for (unsigned int i = 0; i < len; ++i) {
printf ("%02x", data[i]);
}
printf ("\");\n");
#endif
nbytes += len;
address += len;
data += len;
}
return SUUNTO_SUCCESS;
}

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#ifndef SUUNTO_VYPER2_H
#define SUUNTO_VYPER2_H
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct vyper2 vyper2;
#define SUUNTO_VYPER2_MEMORY_SIZE 0x8000
#define SUUNTO_VYPER2_PACKET_SIZE 0x78
int suunto_vyper2_open (vyper2 **device, const char* name);
int suunto_vyper2_close (vyper2 *device);
int suunto_vyper2_read_version (vyper2 *device, unsigned char data[], unsigned int size);
int suunto_vyper2_read_memory (vyper2 *device, unsigned int address, unsigned char data[], unsigned int size);
int suunto_vyper2_write_memory (vyper2 *device, unsigned int address, const unsigned char data[], unsigned int size);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* SUUNTO_VYPER2_H */

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#include <stdio.h> // fprintf
#include "suunto.h"
int test_dump_memory (const char* name, const char* filename)
{
unsigned char data[SUUNTO_VYPER2_MEMORY_SIZE] = {0};
vyper2 *device = NULL;
printf ("suunto_vyper2_open\n");
int rc = suunto_vyper2_open (&device, name);
if (rc != SUUNTO_SUCCESS) {
fprintf (stderr, "Error opening serial port.\n");
return rc;
}
printf ("suunto_vyper2_read_version\n");
unsigned char version[4] = {0};
rc = suunto_vyper2_read_version (device, version, sizeof (version));
if (rc != SUUNTO_SUCCESS) {
fprintf (stderr, "Cannot identify computer.\n");
suunto_vyper2_close (device);
return rc;
}
printf ("suunto_vyper2_read_memory\n");
rc = suunto_vyper2_read_memory (device, 0x00, data, sizeof (data));
if (rc != SUUNTO_SUCCESS) {
fprintf (stderr, "Cannot read memory.\n");
suunto_vyper2_close (device);
return rc;
}
printf ("Dumping data\n");
FILE* fp = fopen (filename, "wb");
if (fp != NULL) {
fwrite (data, sizeof (unsigned char), sizeof (data), fp);
fclose (fp);
}
printf ("suunto_vyper2_close\n");
rc = suunto_vyper2_close (device);
if (rc != SUUNTO_SUCCESS) {
fprintf (stderr, "Cannot close device.");
return rc;
}
return SUUNTO_SUCCESS;
}
const char* errmsg (int rc)
{
switch (rc) {
case SUUNTO_SUCCESS:
return "Success";
case SUUNTO_ERROR:
return "Generic error";
case SUUNTO_ERROR_IO:
return "Input/output error";
case SUUNTO_ERROR_MEMORY:
return "Memory error";
case SUUNTO_ERROR_PROTOCOL:
return "Protocol error";
case SUUNTO_ERROR_TIMEOUT:
return "Timeout";
default:
return "Unknown error";
}
}
int main(int argc, char *argv[])
{
#ifdef _WIN32
const char* name = "COM1";
#else
const char* name = "/dev/ttyS0";
#endif
if (argc > 1) {
name = argv[1];
}
int a = test_dump_memory (name, "VYPER2.DMP");
printf ("\nSUMMARY\n");
printf ("-------\n");
printf ("test_dump_memory: %s\n", errmsg (a));
return 0;
}