Diff: hal.h

Revision:

11:671d85a0f15b

Parent:

0:f2716e543d97

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hal.h	Tue Feb 09 00:28:59 2016 +0000
@@ -0,0 +1,90 @@
+/*******************************************************************************
+ * Copyright (c) 2014-2015 IBM Corporation.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    IBM Zurich Research Lab - initial API, implementation and documentation
+ *******************************************************************************/
+
+#ifndef _hal_hpp_
+#define _hal_hpp_
+
+/*
+ * initialize hardware (IO, SPI, TIMER, IRQ).
+ */
+void hal_init (void);
+
+/*
+ * drive radio NSS pin (0=low, 1=high).
+ */
+void hal_pin_nss (u1_t val);
+
+/*
+ * drive radio RX/TX pins (0=rx, 1=tx).
+ */
+//void hal_pin_rxtx (u1_t val);
+void hal_opmode(u1_t mode, u1_t pa_boost);
+
+/*
+ * control radio RST pin (0=low, 1=high, 2=floating)
+ */
+void hal_pin_rst (u1_t val);
+
+/*
+ * perform 8-bit SPI transaction with radio.
+ *   - write given byte 'outval'
+ *   - read byte and return value
+ */
+u1_t hal_spi (u1_t outval);
+
+/*
+ * disable all CPU interrupts.
+ *   - might be invoked nested 
+ *   - will be followed by matching call to hal_enableIRQs()
+ */
+void hal_disableIRQs (void);
+
+/*
+ * enable CPU interrupts.
+ */
+void hal_enableIRQs (void);
+
+/*
+ * put system and CPU in low-power mode, sleep until interrupt.
+ */
+void hal_sleep (void);
+
+/*
+ * return 32-bit system time in ticks.
+ */
+u4_t hal_ticks (void);
+
+/*
+ * busy-wait until specified timestamp (in ticks) is reached.
+ */
+void hal_waitUntil (u4_t time);
+
+/*
+ * check and rewind timer for target time.
+ *   - return 1 if target time is close
+ *   - otherwise rewind timer for target time or full period and return 0
+ */
+u1_t hal_checkTimer (u4_t targettime);
+
+/*
+ * perform fatal failure action.
+ *   - called by assertions
+ *   - action could be HALT or reboot
+ */
+void hal_failed (void);
+
+#ifndef OSTICKS_PER_SEC
+#define OSTICKS_PER_SEC 16384
+#elif OSTICKS_PER_SEC < 10000 || OSTICKS_PER_SEC > 64516
+#error Illegal OSTICKS_PER_SEC - must be in range [10000:64516]. One tick must be 15.5us .. 100us long.
+#endif
+
+#endif // _hal_hpp_