diff options
-rw-r--r-- | src/GNUmakefile | 8 | ||||
-rw-r--r-- | src/framing.c | 201 | ||||
-rw-r--r-- | src/framing.h | 12 | ||||
-rw-r--r-- | src/qxdm-log.c | 199 | ||||
-rw-r--r-- | src/serial.c | 34 | ||||
-rw-r--r-- | src/serial.h | 6 |
6 files changed, 460 insertions, 0 deletions
diff --git a/src/GNUmakefile b/src/GNUmakefile new file mode 100644 index 0000000..bc3f189 --- /dev/null +++ b/src/GNUmakefile @@ -0,0 +1,8 @@ +CPPFLAGS ?= -O0 -Wall +all: qxdm-log + +qxdm-log: framing.o serial.o qxdm-log.o + $(CC) $(CPPFLAGS) -o $@ $^ $(LIBS) + +clean: + @rm -f qxdm-log *.o diff --git a/src/framing.c b/src/framing.c new file mode 100644 index 0000000..a6696f9 --- /dev/null +++ b/src/framing.c @@ -0,0 +1,201 @@ +/* + * Author: Dieter Spaar + * October 2012 + * + * Modified by Holger Freyther + */ + +#include "framing.h" + +#include <stdio.h> +#include <string.h> + + +#define PACKET_START_STOP 0x7E +#define PACKET_ESCAPE 0x7D + +#define CRC_SEED 0xFFFF + +/* + * Comment is from: utils.c of libqcdm + * QCDM protocol frames are pseudo Async HDLC frames which end with a 3-byte + * trailer. This trailer consists of the 16-bit CRC of the frame plus an ending + * "async control character" whose value is 0x7E. The frame *and* the CRC are + * escaped before adding the trailing control character so that the control + * character (0x7E) and the escape marker (0x7D) are never seen in the frame. + */ + + +/* 16 bit CRC, generator polynomial 0x8408 */ +static const uint16_t crc_ccit16[256] = +{ + 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, + 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, + 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, + 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, + 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, + 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, + 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, + 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, + 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, + 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, + 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, + 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, + 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, + 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, + 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, + 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, + 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, + 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, + 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, + 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, + 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, + 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, + 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, + 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, + 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, + 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, + 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, + 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, + 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, + 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, + 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, + 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 +}; + +static uint16_t crc16(const uint8_t *data, size_t len) +{ + uint16_t crc = CRC_SEED; + + for(; len != 0; len--, data++) + crc = crc_ccit16[(crc ^ *data) & 0x00ff] ^ (crc >> 8); + + /* return the 1's complement */ + return ~crc; +} + +#define DO_ESCAPE(x, idx, out, out_len) \ + if(x == PACKET_START_STOP || x == PACKET_ESCAPE) \ + { \ + if(idx + 2 > out_len) \ + { \ + printf("output buffer too small need %d have %d\n", idx + 2, out_len); \ + return -1; \ + } \ + out[idx++] = PACKET_ESCAPE; \ + out[idx++] = (x ^ 0x20); \ + } \ + else \ + { \ + if(idx + 1 > out_len) \ + { \ + printf("output buffer too small need %d have %d\n", idx + 2, out_len); \ + return -1; \ + } \ + out[idx++] = x; \ + } \ + +int frame_pack(const uint8_t *in, const size_t in_len, uint8_t *out, const size_t out_len) +{ + uint8_t c; + size_t i, idx = 0; + + /* packet data */ + for (i = 0; i < in_len; i++) { + c = in[i]; + DO_ESCAPE(c, idx, out, out_len); + } + + /* two bytes CRC */ + uint16_t crc = crc16(in, in_len); + + c = (uint8_t) (crc & 0xFF); + DO_ESCAPE(c, idx, out, out_len); + + c = (uint8_t) (crc >> 8); + DO_ESCAPE(c, idx, out, out_len); + + /* end of packet */ + out[idx++] = PACKET_START_STOP; + return idx; +} + +#undef DO_ESCAPE + +/* returns number of bytes in pPacket if a packet is complete */ +int frame_unpack(uint8_t *pDataIn, int nDataIn, uint8_t *pPacket) +{ + static uint8_t ubBuf[MAX_PACKET * 2]; + static int nDataBuf = 0; + int i; + + if(nDataIn > sizeof(ubBuf)) { + printf("Too many data\n"); + return -1; + } + + /* is there enough free space in the buffer ? */ + + if(nDataIn + nDataBuf >= sizeof(ubBuf)) { + /* no, empty buffer */ + nDataBuf = 0; + } + + /* append data to buffer */ + memcpy(ubBuf + nDataBuf, pDataIn, nDataIn); + nDataBuf += nDataIn; + + /* search for packet end */ + int idxStop = -1; + for (i = 0; i < nDataBuf; i++) { + if (ubBuf[i] == PACKET_START_STOP) { + idxStop = i; + break; + } + } + + if (idxStop < 0) + return 0; + + /* get packet */ + + int nDataPacket = 0; + int bEscape = 0; + for (i = 0; i < idxStop; i++) + { + if (ubBuf[i] == PACKET_ESCAPE) { + bEscape = 1; + } else { + if (bEscape) + pPacket[nDataPacket++] = (ubBuf[i] ^ 0x20); + else + pPacket[nDataPacket++] = ubBuf[i]; + bEscape = 0; + } + if (nDataPacket >= MAX_PACKET) { + printf("Too many packet data\n"); + return -1; + } + } + + /* remove packet from buffer */ + memmove(ubBuf, ubBuf + idxStop + 1, nDataBuf - (idxStop + 1)); + nDataBuf -= (idxStop + 1); + + /* check CRC */ + + if (nDataPacket <= 2) { + printf("Not enough packet data\n"); + return -1; + } + + uint16_t crc = crc16(pPacket, nDataPacket - 2); + if((crc & 0xFF) != pPacket[nDataPacket - 2] || + (crc >> 8) != pPacket[nDataPacket - 1]) { + printf("Invalid CRC (0x%04X != 0x%02X%02X)\n", + crc, pPacket[nDataPacket - 1], pPacket[nDataPacket - 2]); + return -1; + } + + return nDataPacket - 2; +} diff --git a/src/framing.h b/src/framing.h new file mode 100644 index 0000000..3d96853 --- /dev/null +++ b/src/framing.h @@ -0,0 +1,12 @@ +#ifndef framing_h +#define framing_h + +#include <stdint.h> +#include <sys/types.h> + +#define MAX_PACKET 2048 + +int frame_pack(const uint8_t *in, const size_t in_len, uint8_t *out, const size_t out_len); +int frame_unpack(uint8_t *pDataIn, int nDataIn, uint8_t *pPacket); + +#endif diff --git a/src/qxdm-log.c b/src/qxdm-log.c new file mode 100644 index 0000000..9a949ce --- /dev/null +++ b/src/qxdm-log.c @@ -0,0 +1,199 @@ +#include "framing.h" +#include "serial.h" + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <errno.h> + +char *DumpBYTEs(unsigned char *p, long n, int nBytesPerRow /* = 16 */, char *szLineSep /* = "\n" */, int bRaw /* = FALSE */, const char *szIndent /* = "" */) +{ + long i; + char szBuf[20]; + static char szRes[4 * 1024]; + + szRes[0] = 0; + + if(n == 0) + return szRes; + + memset(szBuf, 0, sizeof(szBuf)); + for(i = 0; i < n; i++) + { + if(i % nBytesPerRow == 0) + { + strcat(szRes, szIndent); + if(!bRaw) + sprintf(szRes + strlen(szRes), "%04d : ", i); + } + + sprintf(szRes + strlen(szRes), "%02X ", p[i]); + szBuf[i % nBytesPerRow] = (char)((p[i] < 128 && p[i] >= ' ') ? p[i] : '.'); + + if((i + 1) % nBytesPerRow == 0) + { + if(bRaw) + sprintf(szRes + strlen(szRes), "%s", szLineSep); + else + sprintf(szRes + strlen(szRes), " %s%s", szBuf, szLineSep); + memset(szBuf, 0, sizeof(szBuf)); + } + } + + if(i % nBytesPerRow != 0) + { + if(bRaw) + sprintf(szRes + strlen(szRes), "%s", szLineSep); + else + { + n = nBytesPerRow - i % nBytesPerRow; + for(i = 0; i < n ; i++) + sprintf(szRes + strlen(szRes), " "); + sprintf(szRes + strlen(szRes), " %s%s", szBuf, szLineSep); + } + } + + return szRes; +} + +static int transmit_packet(int fd, const uint8_t *data, size_t data_len) +{ + int out_len, rc; + uint8_t packet[MAX_PACKET * 2]; + + out_len = frame_pack(data, data_len, packet, sizeof(packet)); + if (out_len < 0) { + printf("Failed to pack packet\n"); + return -1; + } + + rc = write(fd, packet, out_len); + if (rc != out_len) { + printf("Short write on packet.\n"); + return -1; + } + + return 0; +} + +static int do_read(int fd, uint8_t *data) +{ + uint8_t buf[MAX_PACKET]; + int rc; + + rc = read(fd, buf, sizeof(buf)); + if (rc <= 0 ) { + printf("Short read!\n"); + exit(EXIT_FAILURE); + } + + rc = frame_unpack(buf, rc, data); + if (rc > 0) { + printf("Got %d data of payload\n", rc); + printf("%s\n", DumpBYTEs(data, rc, 16, "\n", 0, "")); + } + + return rc; +} + +static void do_configure(int fd) +{ + static uint8_t timestamp[] = { 0x1D }; + static uint8_t enable_logging[] = { + 0x73, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, + 0x05, 0x00, 0x00, 0x00, 0x28, 0x04, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x02, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00 + }; + static const uint8_t enable_evt_report[] = { + 0x60, 0x01 + }; + static const uint8_t disable_evt_report[] = { + 0x60, 0x00 + }; + static const uint8_t extended_report_cfg[] = { + 0x7D, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x02, 0x00, 0x00, 0x00, + }; + + uint8_t data[MAX_PACKET]; + + /* TODO: introduce a wait for response kind of method */ + transmit_packet(fd, timestamp, sizeof(timestamp)); + do_read(fd, data); + + /* enable the event report */ +// transmit_packet(fd, enable_evt_report, sizeof(enable_evt_report)); +// do_read(fd, data); + transmit_packet(fd, disable_evt_report, sizeof(disable_evt_report)); + do_read(fd, data); + + transmit_packet(fd, extended_report_cfg, sizeof(extended_report_cfg)); + do_read(fd, data); + + /* enable the logging */ + transmit_packet(fd, enable_logging, sizeof(enable_logging)); + do_read(fd, data); +} + +int main(int argc, char **argv) +{ + uint8_t data[MAX_PACKET]; + int flags; + + int fd, rc; + if (argc < 2) { + printf("Invoke with %s PATH_TO_SERIAL\n", + argv[0]); + return EXIT_FAILURE; + } + + /* Use nonblock as the device might block otherwise */ + fd = open(argv[1], O_RDWR | O_NOCTTY | O_SYNC | O_NONBLOCK); + if (fd < 0) { + printf("Opening the serial failed: %d/%s\n", + errno, strerror(errno)); + return EXIT_FAILURE; + } + + flags = fcntl(fd, F_GETFL, 0); + if (flags < 0) { + printf("Failed to get the flags.\n"); + return EXIT_FAILURE; + } + + flags &= ~O_NONBLOCK; + rc = fcntl(fd, F_SETFL, flags); + if (rc != 0) { + printf("Failed to set the flags.\n"); + return EXIT_FAILURE; + } + + rc = serial_configure(fd); + if (rc != 0) + return EXIT_FAILURE; + + do_configure(fd); + + while (1) + do_read(fd, data); +} diff --git a/src/serial.c b/src/serial.c new file mode 100644 index 0000000..cf52a94 --- /dev/null +++ b/src/serial.c @@ -0,0 +1,34 @@ +#include <termios.h> +#include <stdio.h> +#include <errno.h> + +int serial_configure(int fd) +{ + struct termios term; + int rc; + + rc = tcgetattr(fd, &term); + if (rc != 0) { + printf("Error with tcgetattr: %d\n", errno); + return -1; + } + + /* taken from libqcdm but I doubt that is copyrightable */ + term.c_cflag &= ~(CBAUD | CSIZE | CSTOPB | CLOCAL | PARENB); + term.c_iflag &= ~(HUPCL | IUTF8 | IUCLC | ISTRIP | IXON | IXOFF | IXANY | ICRNL); + term.c_oflag &= ~(OPOST | OCRNL | ONLCR | OLCUC | ONLRET); + term.c_lflag &= ~(ICANON | ISIG | IEXTEN | ECHO | ECHOE | ECHOK | ECHONL); + term.c_lflag &= ~(NOFLSH | XCASE | TOSTOP | ECHOPRT | ECHOCTL | ECHOKE); + term.c_cc[VMIN] = 1; + term.c_cc[VTIME] = 0; + term.c_cc[VEOF] = 1; + term.c_cflag |= (B115200 | CS8 | CREAD | 0 | 0); + + rc = tcsetattr(fd, TCSANOW, &term); + if (rc != 0) { + printf("Failed to set new attributes: %d\n", errno); + return -2; + } + + return 0; +} diff --git a/src/serial.h b/src/serial.h new file mode 100644 index 0000000..df90a3a --- /dev/null +++ b/src/serial.h @@ -0,0 +1,6 @@ +#ifndef serial_h +#define serial_h + +int serial_configure(int fd); + +#endif |