common: add freewatch utilities

Create a set of internal utilities for the project. For the time being, just the SuperCar blinking for the first MCU dev kit, and the delay function. Signed-off-by: Federico Vaga <federico.vaga@gmail.com>

common: add freewatch utilities
Create a set of internal utilities for the project. For the time being, just the SuperCar blinking for the first MCU dev kit, and the delay function. Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
985a0095 · Federico Vaga · d3465d67 · 985a0095 · 985a0095
Commit 985a0095 authored Jul 08, 2014 by Federico Vaga
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freewatch_utils.c sw/common/freewatch/freewatch_utils.c +57 -0

freewatch_utils.h sw/common/freewatch/freewatch_utils.h +7 -0

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--- a/sw/common/freewatch/freewatch_utils.c
+++ b/sw/common/freewatch/freewatch_utils.c
+					        
+#include "em_device.h"
+#include "em_cmu.h"
+#include "em_gpio.h"
+#include "freewatch_utils.h"
+
+/* Counts 1ms timeTicks */
+volatile uint32_t msTicks;
+
+/**************************************************************************//**
+* @brief SysTick_Handler
+* Interrupt Service Routine for system tick counter
+ *****************************************************************************/
+void SysTick_Handler(void)
+{
+    msTicks++; /* increment counter necessary in Delay()*/
+}
+
+/**************************************************************************//**
+ * @brief Delays number of msTick Systicks (typically 1 ms)
+ * @param dlyTicks Number of ticks to delay
+ *****************************************************************************/
+void Delay(uint32_t dlyTicks)
+{
+    uint32_t curTicks;
+
+    curTicks = msTicks;
+    while ((msTicks - curTicks) < dlyTicks);
+}
+
+/**************************************************************************//**
+ * @brief  Main function
+ *****************************************************************************/
+void supercar_blink(int delay, int rep)
+{
+  int i, c = rep;
+
+    /* Setup SysTick Timer for 1 msec interrupts  */
+    if (SysTick_Config(CMU_ClockFreqGet(cmuClock_CORE) / 1000)) while (1);
+
+    CMU_ClockEnable(cmuClock_HFPER, true);
+    CMU_ClockEnable(cmuClock_GPIO, true);
+
+    for (i = 1; i < 5; ++i) {
+        GPIO_PinModeSet(gpioPortD, i, gpioModePushPull, 0);
+    }
+
+    /* Infinite blink loop */
+    while (c--) {
+        for (i = 1; i < 5; ++i) {
+            GPIO_PinOutToggle(gpioPortD, i);
+            Delay(delay);
+        }
+    }
+}
+
+
--- a/sw/common/freewatch/freewatch_utils.h
+++ b/sw/common/freewatch/freewatch_utils.h
+#ifndef __FREEWATCH_UTILS_H__
+#define __FREEWATCH_UTILS_H__
+
+extern void supercar_blink(int delay, int rep);
+extern void Delay(uint32_t dlyTicks);
+
+#endif