diff options
Diffstat (limited to 'stm32f091/backlog.c')
| -rw-r--r-- | stm32f091/backlog.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/stm32f091/backlog.c b/stm32f091/backlog.c new file mode 100644 index 0000000..3f21924 --- /dev/null +++ b/stm32f091/backlog.c @@ -0,0 +1,34 @@ +#include <stdlib.h> + +#include "backlog.h" + +ws_s_backlog_database* WS_G_BACKLOG_DATABASE = NULL; + +void ws_backlog_alloc(uint16_t record_amt) { + WS_G_BACKLOG_DATABASE = malloc(sizeof(ws_s_backlog_database) + sizeof(ws_s_backlog_record) * record_amt); + WS_G_BACKLOG_DATABASE->buffer_size = record_amt; + WS_G_BACKLOG_DATABASE->buffer_start = 0; + WS_G_BACKLOG_DATABASE->buffer_end = 0; +} + +void ws_backlog_add_record(ws_s_backlog_record record) { + static uint16_t id = 0; + + WS_G_BACKLOG_DATABASE->records[WS_G_BACKLOG_DATABASE->buffer_end].id = id++; + WS_G_BACKLOG_DATABASE->records[WS_G_BACKLOG_DATABASE->buffer_end].sens_atm_pressure = record.sens_atm_pressure; + WS_G_BACKLOG_DATABASE->records[WS_G_BACKLOG_DATABASE->buffer_end].sens_humidity = record.sens_humidity; + WS_G_BACKLOG_DATABASE->records[WS_G_BACKLOG_DATABASE->buffer_end].sens_temperature = record.sens_temperature; + + // shift buffer start/end + WS_G_BACKLOG_DATABASE->buffer_end = (WS_G_BACKLOG_DATABASE->buffer_end + 1) % WS_G_BACKLOG_DATABASE->buffer_size; + if (WS_G_BACKLOG_DATABASE->buffer_end == WS_G_BACKLOG_DATABASE->buffer_start) + WS_G_BACKLOG_DATABASE->buffer_start = (WS_G_BACKLOG_DATABASE->buffer_start + 1) % WS_G_BACKLOG_DATABASE->buffer_size; +} + +ws_s_backlog_record* ws_backlog_get_record(uint16_t record_index) { + return &WS_G_BACKLOG_DATABASE->records[record_index]; +} + +ws_s_backlog_record* ws_backlog_get_last_record(uint16_t record_offset) { + return ws_backlog_get_record((WS_G_BACKLOG_DATABASE->buffer_end - record_offset - 1) % WS_G_BACKLOG_DATABASE->buffer_size); +} |