1 files changed, 75 insertions, 0 deletions
diff --git a/firmware/usrp3/include/cron.h b/firmware/usrp3/include/cron.h
new file mode 100644
index 000000000..2d43d97f5
--- /dev/null
+++ b/firmware/usrp3/include/cron.h
@@ -0,0 +1,75 @@
+//
+// Copyright 2014 Ettus Research LLC
+//
+// 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 3 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, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_CRON_H
+#define INCLUDED_CRON_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#define CRON_MAX_JOBS 4
+
+typedef enum {
+    SEC = 1, MILLISEC = 1000, MICROSEC = 1000000
+} cron_time_unit_t;
+
+typedef uint32_t (*cron_counter_fetcher_t)();
+
+/*!
+ * \brief Initialize cron subsystem with a mechanism to fetch a counter and its frequency
+ */
+void cron_init(const cron_counter_fetcher_t fetch_counter, uint32_t counter_freq);
+
+/*!
+ * \brief Get the hardware tick count
+ */
+uint32_t cron_get_ticks();
+
+/*!
+ * \brief Get the time elapsed between start and stop in the specified units
+ */
+uint32_t get_elapsed_time(uint32_t start_ticks, uint32_t stop_ticks, cron_time_unit_t unit);
+
+/*!
+ * \brief Sleep (spinloop) for about 'ticks' counter ticks
+ * Use only if simulating, _very_ short delay
+ */
+void sleep_ticks(uint32_t ticks);
+
+/*!
+ * \brief Sleep (spinloop) for about 'duration' microseconds
+ * Use only if simulating, _very_ short delay
+ */
+void sleep_us(uint32_t duration);
+
+/*!
+ * \brief Sleep (spinloop) for about 'duration' milliseconds
+ * Use only if simulating, _very_ short delay
+ */
+void sleep_ms(uint32_t duration);
+
+/*!
+ * \brief Initialize a unique cron job with 'job_id' and interval 'interval_ms'
+ */
+void cron_job_init(uint32_t job_id, uint32_t interval_ms);
+
+/*!
+ * \brief Check if cron job with 'job_id' is due for execution
+ */
+bool cron_job_run_due(uint32_t job_id);
+
+#endif /* INCLUDED_CRON_H */