Diff: targets/hal/TARGET_WIZNET/TARGET_W7500x/us_ticker.c

Revision:

558:0880f51c4036

Child:

576:99a3d3d9c43f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_WIZNET/TARGET_W7500x/us_ticker.c	Wed Jun 03 09:00:09 2015 +0100
@@ -0,0 +1,137 @@
+/* mbed Microcontroller Library 
+ *******************************************************************************
+ * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of ARM Limited nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+
+#include <stddef.h>
+#include "us_ticker_api.h"
+#include "PeripheralNames.h"
+#include "system_W7500x.h"
+
+// 32-bit timer selection
+#define TIM_MST7    PWM_CH7
+#define TIM_MST6    PWM_CH6
+#define IRQn_PWM6   PWM6_IRQn
+
+static PWM_TimerModeInitTypeDef TimMasterHandle_CH7;
+static PWM_TimerModeInitTypeDef TimMasterHandle_CH6;
+
+static int us_ticker_inited = 0;
+
+
+#ifdef __cplusplus
+extern "C"{
+#endif
+void PWM6_Handler(void)
+{
+    uint32_t IntFlag = 0;
+
+    IntFlag = PWM_CHn_GetIntFlagStatus(TIM_MST6);
+
+    /* If overflow interrupt is occurred */
+    if( (IntFlag & PWM_CHn_IER_OI_Msk) != 0 )
+    {
+        /* Clear overflow interrupt */
+        PWM_CH6_ClearOverflowInt();
+        us_ticker_irq_handler();
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+void us_ticker_init(void)
+{
+    if (us_ticker_inited) return;
+    us_ticker_inited = 1;
+
+    SystemCoreClockUpdate();
+    TimMasterHandle_CH7.PWM_CHn_PR = (GetSystemClock() / 1000000) -1;
+    TimMasterHandle_CH7.PWM_CHn_LR = 0xFFFFFFFF;
+    TimMasterHandle_CH7.PWM_CHn_PDMR = 1;
+
+    PWM_TimerModeInit(TIM_MST7, &TimMasterHandle_CH7);
+    PWM_CHn_Start(TIM_MST7);
+}
+
+
+uint32_t us_ticker_read()
+{
+    if (!us_ticker_inited) us_ticker_init();
+
+    return (TIM_MST7->TCR);
+}
+
+
+void us_ticker_set_interrupt(timestamp_t timestamp)
+{
+    int32_t dev = 0;
+    if (!us_ticker_inited)
+    {
+        us_ticker_init();
+    }
+    
+    dev = (int32_t)(timestamp - (us_ticker_read() + 150));
+
+    if(dev <= 0)
+    {
+        us_ticker_irq_handler();
+    	return;
+    }
+
+    PWM_CHn_Stop(TIM_MST6);
+
+    SystemCoreClockUpdate();
+    TimMasterHandle_CH6.PWM_CHn_PR = (GetSystemClock() / 1000000) -1;
+    TimMasterHandle_CH6.PWM_CHn_LR = dev;
+
+    TimMasterHandle_CH6.PWM_CHn_UDMR = 0;
+    TimMasterHandle_CH6.PWM_CHn_PDMR = 0;
+
+    NVIC_EnableIRQ(IRQn_PWM6);
+
+    PWM_CHn_IntConfig(TIM_MST6, PWM_CHn_IER_OIE, ENABLE);
+    PWM_IntConfig(TIM_MST6, ENABLE);
+    PWM_TimerModeInit(TIM_MST6, &TimMasterHandle_CH6);
+
+    PWM_CHn_Start(TIM_MST6);
+}
+
+void us_ticker_disable_interrupt(void)
+{
+    NVIC_DisableIRQ(IRQn_PWM6);
+
+    PWM_CHn_IntConfig(TIM_MST6, PWM_CHn_IER_OIE, DISABLE);
+    PWM_IntConfig(TIM_MST6, DISABLE);
+}
+
+void us_ticker_clear_interrupt(void)
+{
+    PWM_CHn_ClearInt(TIM_MST6, PWM_CHn_IER_OIE);
+}