diff options
Diffstat (limited to 'src/linuxaldl.c')
| -rw-r--r-- | src/linuxaldl.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/src/linuxaldl.c b/src/linuxaldl.c index 8ffc4be..d898ac6 100644 --- a/src/linuxaldl.c +++ b/src/linuxaldl.c @@ -114,9 +114,9 @@ int main(int argc, const char* argv[]){ } poptFreeContext(popt_aldl); // free the popt context - // ======================================================================== - // CONNECT / VERIFY ALDL INTERFACE - // ======================================================================== + // ======================================================= + // CONNECT / VERIFY ALDL INTERFACE + // ======================================================= // Establish a connection to the aldl // =================================== @@ -131,16 +131,27 @@ int main(int argc, const char* argv[]){ return -1; } - // set the custom baud rate: - // the ALDL interface operates at 8192. it would be preferable to get as close to this - // baud rate as possible. if it cannot be set; it should still work at the standard - // baud rate of 9600; the framing errors aren't excessive enough to cause problems, - // and will be caught by bad checksums. + /* Set custom baud rate: + ALDL has two variants; + 1) 160 baud with non-RS232 framing. Clock up to 1600 baud + and take one byte from each bit to get us the 8 data bits + plus one start and one stop bit. + 2) 8192 baud with RS232 framing. + + Prefer to set exact baud rate if possible, but they are non-standard + PC datarates.. + + 8192 should work at 9600; the packets are short enough that framing + errors should be minimal and checksums will catch them anyway. + */ + + aldl_settings.customrate = 1; if (set_custom_baud_rate(aldl_settings.faldl, aldl_settings.definition->ideal_baudrate)!=0) { fprintf(stderr," Couldn't set baud rate to %d. Using standard rate (%d).\n", aldl_settings.definition->ideal_baudrate, aldl_settings.definition->basic_baudrate); fprintf(stderr," There may be framing errors.\n"); + aldl_settings.customrate = 0; } // verify the aldl @@ -175,9 +186,9 @@ int main(int argc, const char* argv[]){ } - // ======================================================================== - // CLEANUP (FLUSH SERIAL LINE, CLOSE PORT) - // ======================================================================== + // ============================================================ + // CLEANUP (FLUSH SERIAL LINE, CLOSE PORT) + // ============================================================ // discard any unwritten data tcflush(aldl_settings.faldl, TCIOFLUSH); @@ -253,7 +264,7 @@ int send_aldl_message(char* msg_buf, unsigned int size) // so that mode 8 isn't even required. int get_mode1_message(char* inbuffer, unsigned int size) { - int res; + int res = 0; char outbuffer[__MAX_REQUEST_SIZE]; // max request size defined in linuxaldl_definitions.h aldl_definition* def = aldl_settings.definition; @@ -287,6 +298,7 @@ int get_mode1_message(char* inbuffer, unsigned int size) seq, 3, 0, aldl_settings.scan_timeout*1000); } else { + /* Wait for Framing START ? */ // XXX what sequence to match for 160baud rate? } |