Added the initial implementation for the Reefnet Sensus Pro.
This commit is contained in:
Jef Driesen
parent
8faae14591
commit
3918ca99c5
13
reefnet.h
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13
reefnet.h
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#ifndef REEFNET_H
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#define REEFNET_H
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#define REEFNET_SUCCESS 0
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#define REEFNET_ERROR -1
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#define REEFNET_ERROR_IO -2
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#define REEFNET_ERROR_MEMORY -3
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#define REEFNET_ERROR_PROTOCOL -4
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#define REEFNET_ERROR_TIMEOUT -5
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#include "reefnet_sensuspro.h"
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#endif /* REEFNET_H */
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266
reefnet_sensuspro.c
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266
reefnet_sensuspro.c
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#include <string.h> // memcmp, memcpy
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#include <stdlib.h> // malloc, free
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#include "reefnet.h"
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#include "serial.h"
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#include "utils.h"
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#define WARNING(expr) \
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{ \
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message ("%s:%d: %s\n", __FILE__, __LINE__, expr); \
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}
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#define EXITCODE(rc, n) \
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( \
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rc == -1 ? \
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REEFNET_ERROR_IO : \
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(rc != n ? REEFNET_ERROR_TIMEOUT : REEFNET_ERROR_PROTOCOL) \
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)
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struct sensuspro {
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struct serial *port;
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};
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int
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reefnet_sensuspro_open (sensuspro **out, const char* name)
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{
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if (out == NULL)
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return REEFNET_ERROR;
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// Allocate memory.
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struct sensuspro *device = malloc (sizeof (struct sensuspro));
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if (device == NULL) {
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WARNING ("Failed to allocate memory.");
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return REEFNET_ERROR_MEMORY;
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}
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// Set the default values.
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device->port = NULL;
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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 REEFNET_ERROR_IO;
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}
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// Set the serial communication protocol (19200 8N1).
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rc = serial_configure (device->port, 19200, 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 REEFNET_ERROR_IO;
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}
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// Set the timeout for receiving data (3000ms).
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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 REEFNET_ERROR_IO;
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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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*out = device;
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return REEFNET_SUCCESS;
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}
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int
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reefnet_sensuspro_close (sensuspro *device)
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{
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if (device == NULL)
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return REEFNET_SUCCESS;
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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 REEFNET_ERROR_IO;
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}
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// Free memory.
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free (device);
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return REEFNET_SUCCESS;
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}
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static unsigned short
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reefnet_sensuspro_checksum (unsigned char *data, unsigned int size)
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{
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static unsigned short crc_ccitt_table[] = {
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0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
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0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
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0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
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0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
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0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
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0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
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0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
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0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
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0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
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0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
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0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
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0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
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0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
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0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
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0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
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0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
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0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
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0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
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0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
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0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
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0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
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0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
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0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
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0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
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0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
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0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
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0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
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0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
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0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
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0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
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0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
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0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
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};
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unsigned short crc = 0xffff;
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for (unsigned int i = 0; i < size; ++i)
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crc = (crc << 8) ^ crc_ccitt_table[(crc >> 8) ^ data[i]];
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return crc;
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}
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int
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reefnet_sensuspro_handshake (sensuspro *device, unsigned char *data, unsigned int size)
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{
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if (device == NULL)
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return REEFNET_ERROR;
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// Assert a break condition.
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serial_set_break (device->port, 1);
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// Receive the handshake from the dive computer.
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unsigned char handshake[REEFNET_SENSUSPRO_HANDSHAKE_SIZE + 2] = {0};
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int rc = serial_read (device->port, handshake, sizeof (handshake));
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if (rc != sizeof (handshake)) {
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WARNING ("Failed to receive the handshake.");
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return EXITCODE (rc, sizeof (handshake));
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}
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// Clear the break condition again.
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serial_set_break (device->port, 0);
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// Verify the checksum of the handshake packet.
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unsigned short crc = handshake[10] + (handshake[11] << 8);
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unsigned short ccrc = reefnet_sensuspro_checksum (handshake, sizeof (handshake) - 2);
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if (crc != ccrc) {
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WARNING ("Unexpected answer CRC.");
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return REEFNET_ERROR_PROTOCOL;
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}
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#ifndef NDEBUG
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message (
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"Product Code: %u\n"
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"Version Code: %u\n"
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"Battery Voltage: %u\n"
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"Sample Interval: %u\n"
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"Device ID: %u\n"
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"Current Time: %u\n",
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handshake[0], handshake[1],
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handshake[2], handshake[3],
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handshake[4] + (handshake[5] << 8),
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handshake[6] + (handshake[7] << 8) + (handshake[8] << 16) + (handshake[9] << 24));
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#endif
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if (size >= sizeof (handshake) - 2)
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memcpy (data, handshake, sizeof (handshake) - 2);
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else
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WARNING ("Insufficient buffer space available.");
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serial_sleep (10);
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return REEFNET_SUCCESS;
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}
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int
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reefnet_sensuspro_read (sensuspro *device, unsigned char *data, unsigned int size)
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{
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if (device == NULL)
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return REEFNET_ERROR;
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unsigned char command = 0xB4;
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int rc = serial_write (device->port, &command, 1);
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if (rc != 1) {
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WARNING ("Failed to send the command.");
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return EXITCODE (rc, 1);
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}
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unsigned int nbytes = 0;
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unsigned char answer[REEFNET_SENSUSPRO_MEMORY_SIZE + 2] = {0};
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while (nbytes < sizeof (answer)) {
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unsigned int len = sizeof (answer) - nbytes;
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if (len > 256)
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len = 256;
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int rc = serial_read (device->port, answer + nbytes, len);
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if (rc != len) {
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WARNING ("Failed to receive the answer.");
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return EXITCODE (rc, len);
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}
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nbytes += len;
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}
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unsigned short crc =
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answer[REEFNET_SENSUSPRO_MEMORY_SIZE + 0] +
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(answer[REEFNET_SENSUSPRO_MEMORY_SIZE + 1] << 8);
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unsigned short ccrc = reefnet_sensuspro_checksum (answer, REEFNET_SENSUSPRO_MEMORY_SIZE);
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if (crc != ccrc) {
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WARNING ("Unexpected answer CRC.");
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return REEFNET_ERROR_PROTOCOL;
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}
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if (size >= REEFNET_SENSUSPRO_MEMORY_SIZE)
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memcpy (data, answer, REEFNET_SENSUSPRO_MEMORY_SIZE);
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else
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WARNING ("Insufficient buffer space available.");
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return REEFNET_SUCCESS;
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}
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int
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reefnet_sensuspro_write_interval (sensuspro *device, unsigned char interval)
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{
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if (device == NULL)
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return REEFNET_ERROR;
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if (interval < 1 || interval > 127)
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return REEFNET_ERROR;
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unsigned char command = 0xB5;
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int rc = serial_write (device->port, &command, 1);
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if (rc != 1) {
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WARNING ("Failed to send the command.");
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return EXITCODE (rc, 1);
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}
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serial_sleep (10);
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rc = serial_write (device->port, &interval, 1);
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if (rc != 1) {
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WARNING ("Failed to send the new value.");
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return EXITCODE (rc, 1);
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}
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return REEFNET_SUCCESS;
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}
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26
reefnet_sensuspro.h
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26
reefnet_sensuspro.h
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#ifndef REEFNET_SENSUSPRO_H
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#define REEFNET_SENSUSPRO_H
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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typedef struct sensuspro sensuspro;
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#define REEFNET_SENSUSPRO_MEMORY_SIZE 56320
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#define REEFNET_SENSUSPRO_HANDSHAKE_SIZE 10
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int reefnet_sensuspro_open (sensuspro **device, const char* name);
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int reefnet_sensuspro_close (sensuspro *device);
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int reefnet_sensuspro_handshake (sensuspro *device, unsigned char data[], unsigned int size);
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int reefnet_sensuspro_read (sensuspro *device, unsigned char data[], unsigned int size);
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int reefnet_sensuspro_write_interval (sensuspro *device, unsigned char interval);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* REEFNET_SENSUSPRO_H */
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110
reefnet_sensuspro_test.c
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110
reefnet_sensuspro_test.c
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#include <stdio.h> // fopen, fwrite, fclose
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#include <time.h> // time
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#include "reefnet.h"
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#include "utils.h"
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#define WARNING(expr) \
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{ \
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message ("%s:%d: %s\n", __FILE__, __LINE__, expr); \
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}
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int test_dump_memory (const char* name, const char* filename)
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{
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sensuspro *device = NULL;
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unsigned char data[REEFNET_SENSUSPRO_MEMORY_SIZE] = {0};
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unsigned char handshake[REEFNET_SENSUSPRO_HANDSHAKE_SIZE] = {0};
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message ("reefnet_sensuspro_open\n");
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int rc = reefnet_sensuspro_open (&device, name);
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if (rc != REEFNET_SUCCESS) {
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WARNING ("Error opening serial port.");
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return rc;
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}
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message ("reefnet_sensuspro_handshake\n");
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rc = reefnet_sensuspro_handshake (device, handshake, sizeof (handshake));
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if (rc != REEFNET_SUCCESS) {
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WARNING ("Cannot read handshake.");
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reefnet_sensuspro_close (device);
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return rc;
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}
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time_t now = time (NULL);
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unsigned char datetime[21] = {0};
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strftime (datetime, sizeof (datetime), "%Y-%m-%dT%H:%M:%SZ", gmtime (&now));
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message ("time=%lu (%s)\n", (unsigned long)now, datetime);
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message ("reefnet_sensuspro_read\n");
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rc = reefnet_sensuspro_read (device, data, sizeof (data));
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if (rc != REEFNET_SUCCESS) {
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WARNING ("Cannot read memory.");
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reefnet_sensuspro_close (device);
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return rc;
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}
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message ("Dumping data\n");
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FILE* fp = fopen (filename, "wb");
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if (fp != NULL) {
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fwrite (data, sizeof (unsigned char), sizeof (data), fp);
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fclose (fp);
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}
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message ("reefnet_sensuspro_close\n");
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rc = reefnet_sensuspro_close (device);
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if (rc != REEFNET_SUCCESS) {
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WARNING ("Cannot close device.");
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return rc;
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}
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return REEFNET_SUCCESS;
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}
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const char* errmsg (int rc)
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{
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switch (rc) {
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case REEFNET_SUCCESS:
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return "Success";
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case REEFNET_ERROR:
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return "Generic error";
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case REEFNET_ERROR_IO:
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return "Input/output error";
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case REEFNET_ERROR_MEMORY:
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return "Memory error";
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case REEFNET_ERROR_PROTOCOL:
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return "Protocol error";
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case REEFNET_ERROR_TIMEOUT:
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return "Timeout";
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default:
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return "Unknown error";
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}
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}
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int main(int argc, char *argv[])
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{
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message_set_logfile ("SENSUSPRO.LOG");
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#ifdef _WIN32
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const char* name = "COM1";
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#else
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const char* name = "/dev/ttyS0";
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#endif
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if (argc > 1) {
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name = argv[1];
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}
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message ("DEVICE=%s\n", name);
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int a = test_dump_memory (name, "SENSUSPRO.DMP");
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message ("SUMMARY\n");
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message ("-------\n");
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message ("test_dump_memory: %s\n", errmsg (a));
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message_set_logfile (NULL);
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return 0;
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}
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