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-rw-r--r--include/libopencm3/lpc43xx/systick.h84
1 files changed, 84 insertions, 0 deletions
diff --git a/include/libopencm3/lpc43xx/systick.h b/include/libopencm3/lpc43xx/systick.h
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+++ b/include/libopencm3/lpc43xx/systick.h
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+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Thomas Otto <tommi@viadmin.org>
+ * Copyright (C) 2012 Benjamin Vernoux <titanmkd@gmail.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBOPENCM3_SYSTICK_H
+#define LIBOPENCM3_SYSTICK_H
+
+#include <libopencm3/lpc43xx/memorymap.h>
+#include <libopencm3/cm3/memorymap.h>
+#include <libopencm3/cm3/common.h>
+
+/* --- SYSTICK registers --------------------------------------------------- */
+/* See also libopencm3\cm3\scs.h for details on SysTicks registers */
+
+/* Control and status register (STK_CTRL) */
+#define STK_CTRL MMIO32(SYS_TICK_BASE + 0x00)
+
+/* reload value register (STK_LOAD) */
+#define STK_LOAD MMIO32(SYS_TICK_BASE + 0x04)
+
+/* current value register (STK_VAL) */
+#define STK_VAL MMIO32(SYS_TICK_BASE + 0x08)
+
+/* calibration value register (STK_CALIB) */
+#define STK_CALIB MMIO32(SYS_TICK_BASE + 0x0C)
+
+/* --- STK_CTRL values ----------------------------------------------------- */
+/* Bits [31:17] Reserved, must be kept cleared. */
+/* COUNTFLAG: */
+#define STK_CTRL_COUNTFLAG (1 << 16)
+/* Bits [15:3] Reserved, must be kept cleared. */
+/* CLKSOURCE: Clock source selection */
+#define STK_CTRL_CLKSOURCE (1 << 2)
+/* TICKINT: SysTick exception request enable */
+#define STK_CTRL_TICKINT (1 << 1)
+/* ENABLE: Counter enable */
+#define STK_CTRL_ENABLE (1 << 0)
+
+/* --- STK_LOAD values ----------------------------------------------------- */
+/* Bits [31:24] Reserved, must be kept cleared. */
+/* RELOAD[23:0]: RELOAD value */
+
+/* --- STK_VAL values ------------------------------------------------------ */
+/* Bits [31:24] Reserved, must be kept cleared. */
+/* CURRENT[23:0]: Current counter value */
+
+/* --- STK_CALIB values ---------------------------------------------------- */
+/* NOREF: NOREF flag */
+#define STK_CALIB_NOREF (1 << 31)
+/* SKEW: SKEW flag */
+#define STK_CALIB_SKEW (1 << 30)
+/* Bits [29:24] Reserved, must be kept cleared. */
+/* TENMS[23:0]: Calibration value */
+
+/* --- Function Prototypes ------------------------------------------------- */
+
+void systick_set_reload(u32 value);
+u32 systick_get_value(void);
+void systick_set_clocksource(u8 clocksource);
+void systick_interrupt_enable(void);
+void systick_interrupt_disable(void);
+void systick_counter_enable(void);
+void systick_counter_disable(void);
+u8 systick_get_countflag(void);
+
+u32 systick_get_calib(void);
+
+#endif