init project

Signed-off-by: a1012112796 <1012112796@qq.com>

rt-thread/components/drivers/cputime/SConscript

@@ -0,0 +1,14 @@
+from building import *
+
+cwd     = GetCurrentDir()
+CPPPATH = [cwd + '/../include']
+src     = Split('''
+cputime.c
+''')
+
+if GetDepend('RT_USING_CPUTIME_CORTEXM'):
+    src += ['cputime_cortexm.c']
+
+group   = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_CPUTIME'], CPPPATH = CPPPATH)
+
+Return('group')

rt-thread/components/drivers/cputime/cputime.c

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2017-12-23     Bernard           first version
+ */
+
+#include <rtdevice.h>
+#include <rtthread.h>
+#include <sys/errno.h>
+
+static const struct rt_clock_cputime_ops *_cputime_ops  = RT_NULL;
+
+/**
+ * The clock_cpu_getres() function shall return the resolution of CPU time, the
+ * number of nanosecond per tick.
+ *
+ * @return the number of nanosecond per tick
+ */
+float clock_cpu_getres(void)
+{
+    if (_cputime_ops)
+        return _cputime_ops->cputime_getres();
+
+    rt_set_errno(ENOSYS);
+    return 0;
+}
+
+/**
+ * The clock_cpu_gettime() function shall return the current value of cpu time tick.
+ *
+ * @return the cpu tick
+ */
+uint64_t clock_cpu_gettime(void)
+{
+    if (_cputime_ops)
+        return _cputime_ops->cputime_gettime();
+
+    rt_set_errno(ENOSYS);
+    return 0;
+}
+
+/**
+ * The clock_cpu_microsecond() fucntion shall return the microsecond according to
+ * cpu_tick parameter.
+ *
+ * @param cpu_tick the cpu tick
+ *
+ * @return the microsecond
+ */
+uint32_t clock_cpu_microsecond(uint32_t cpu_tick)
+{
+    float unit = clock_cpu_getres();
+
+    return (uint32_t)((cpu_tick * unit) / 1000);
+}
+
+/**
+ * The clock_cpu_microsecond() fucntion shall return the millisecond according to
+ * cpu_tick parameter.
+ *
+ * @param cpu_tick the cpu tick
+ *
+ * @return the millisecond
+ */
+uint32_t clock_cpu_millisecond(uint32_t cpu_tick)
+{
+    float unit = clock_cpu_getres();
+
+    return (uint32_t)((cpu_tick * unit) / (1000 * 1000));
+}
+
+/**
+ * The clock_cpu_seops() function shall set the ops of cpu time.
+ *
+ * @return always return 0.
+ */
+int clock_cpu_setops(const struct rt_clock_cputime_ops *ops)
+{
+    _cputime_ops = ops;
+    if (ops)
+    {
+        RT_ASSERT(ops->cputime_getres  != RT_NULL);
+        RT_ASSERT(ops->cputime_gettime != RT_NULL);
+    }
+
+    return 0;
+}

rt-thread/components/drivers/cputime/cputime_cortexm.c

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2017-12-23     Bernard           first version
+ * 2022-06-14     Meco Man          suuport pref_counter
+ */
+
+#include <rthw.h>
+#include <rtdevice.h>
+#include <rtthread.h>
+
+#include <board.h>
+#ifdef PKG_USING_PERF_COUNTER
+#include <perf_counter.h>
+#endif
+
+/* Use Cycle counter of Data Watchpoint and Trace Register for CPU time */
+static float cortexm_cputime_getres(void)
+{
+    float ret = 1000 * 1000 * 1000;
+
+    ret = ret / SystemCoreClock;
+    return ret;
+}
+
+static uint64_t cortexm_cputime_gettime(void)
+{
+#ifdef PKG_USING_PERF_COUNTER
+    return get_system_ticks();
+#else
+    return DWT->CYCCNT;
+#endif
+}
+
+const static struct rt_clock_cputime_ops _cortexm_ops =
+{
+    cortexm_cputime_getres,
+    cortexm_cputime_gettime
+};
+
+
+int cortexm_cputime_init(void)
+{
+#ifdef PKG_USING_PERF_COUNTER
+    clock_cpu_setops(&_cortexm_ops);
+#else
+    /* check support bit */
+    if ((DWT->CTRL & (1UL << DWT_CTRL_NOCYCCNT_Pos)) == 0)
+    {
+        /* enable trace*/
+        CoreDebug->DEMCR |= (1UL << CoreDebug_DEMCR_TRCENA_Pos);
+
+        /* whether cycle counter not enabled */
+        if ((DWT->CTRL & (1UL << DWT_CTRL_CYCCNTENA_Pos)) == 0)
+        {
+            /* enable cycle counter */
+            DWT->CTRL |= (1UL << DWT_CTRL_CYCCNTENA_Pos);
+        }
+
+        clock_cpu_setops(&_cortexm_ops);
+    }
+#endif /* PKG_USING_PERF_COUNTER */
+    return 0;
+}
+INIT_BOARD_EXPORT(cortexm_cputime_init);