diff options
Diffstat (limited to 'libarmep/aepd-interface.h')
| -rw-r--r-- | libarmep/aepd-interface.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/libarmep/aepd-interface.h b/libarmep/aepd-interface.h new file mode 100644 index 0000000..9b43352 --- /dev/null +++ b/libarmep/aepd-interface.h @@ -0,0 +1,73 @@ +/* + * Author: Andy Green <andy.green@linaro.org> + * Copyright (C) 2012 Linaro, LTD + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + * These are the interface structs between the acquisition-specific + * code and the shared memory buffers, which are just abstracted + * sample and channel descriptions with no knowledge of what + * produced them + */ + +#define AEPD_SHARED_MAX_REAL_CHANNELS (8 * 3) +#define AEPD_SHARED_MAX_VIRTUAL_CHANNELS (8) + +struct aepd_interface_result { + int triggered; /* 0 = pretrigger 1 = triggered */ + int chans; /* number of channels below with data */ + double samtime; /* sample time in s */ + + /* For each channel: { common-mode voltage in V, current in A } */ + double buf[AEPD_SHARED_MAX_REAL_CHANNELS * 2]; +}; + +struct aepd_interface { + + /* ringbuffer to hold channel_results until we can deal with them */ + + int head; + int tail; + struct aepd_interface_result aepd_interface_result[1000]; + + /* synchronization object signalling new result written */ + sem_t * semaphore; + char semname[64]; + + /* metadata about the channels */ + + char channel_name[AEPD_SHARED_MAX_VIRTUAL_CHANNELS + AEPD_SHARED_MAX_REAL_CHANNELS][64]; + char channel_name_pretty[AEPD_SHARED_MAX_VIRTUAL_CHANNELS + AEPD_SHARED_MAX_REAL_CHANNELS][64]; + char supply[AEPD_SHARED_MAX_VIRTUAL_CHANNELS + AEPD_SHARED_MAX_REAL_CHANNELS][64]; + char colour[AEPD_SHARED_MAX_VIRTUAL_CHANNELS + AEPD_SHARED_MAX_REAL_CHANNELS][16]; + char class[AEPD_SHARED_MAX_VIRTUAL_CHANNELS + AEPD_SHARED_MAX_REAL_CHANNELS][16]; + int chans; /* number of active acquisition channels above */ + int vchans; /* virtual channels (summing supplies) appear after probed physical channels in the arrays */ + int finished; /* are we going down? */ + + /* simple stats on what was captured */ + + double averages[AEPD_SHARED_MAX_REAL_CHANNELS][3]; + double min[AEPD_SHARED_MAX_REAL_CHANNELS][3]; + double max[AEPD_SHARED_MAX_REAL_CHANNELS][3]; + +}; + +extern struct aepd_interface *aepd_interface_create(void); +extern void aepd_interface_destroy(struct aepd_interface *aepd_interface); +extern struct aepd_interface_result * aep_wait_for_next_result(struct aepd_interface *aepd_interface); +extern void aep_free_result(struct aepd_interface *aepd_interface); + |