Diff: targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_dbg.c

Revision:

0:9b334a45a8ff

Child:

50:a417edff4437

diff -r 000000000000 -r 9b334a45a8ff targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_dbg.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_dbg.c	Thu Oct 01 15:25:22 2015 +0300
@@ -0,0 +1,119 @@
+/***************************************************************************//**
+ * @file em_dbg.c
+ * @brief Debug (DBG) Peripheral API
+ * @version 3.20.12
+ *******************************************************************************
+ * @section License
+ * <b>(C) Copyright 2014 Silicon Labs, http://www.silabs.com</b>
+ *******************************************************************************
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
+ * obligation to support this Software. Silicon Labs is providing the
+ * Software "AS IS", with no express or implied warranties of any kind,
+ * including, but not limited to, any implied warranties of merchantability
+ * or fitness for any particular purpose or warranties against infringement
+ * of any proprietary rights of a third party.
+ *
+ * Silicon Labs will not be liable for any consequential, incidental, or
+ * special damages, or any other relief, or for any claim by any third party,
+ * arising from your use of this Software.
+ *
+ ******************************************************************************/
+
+#include "em_dbg.h"
+
+#if defined ( CoreDebug_DHCSR_C_DEBUGEN_Msk )
+
+#include "em_assert.h"
+#include "em_cmu.h"
+#include "em_gpio.h"
+
+/***************************************************************************//**
+ * @addtogroup EM_Library
+ * @{
+ ******************************************************************************/
+
+/***************************************************************************//**
+ * @addtogroup DBG
+ * @brief Debug (DBG) Peripheral API
+ * @{
+ ******************************************************************************/
+
+/*******************************************************************************
+ **************************   GLOBAL FUNCTIONS   *******************************
+ ******************************************************************************/
+
+#if defined( GPIO_ROUTE_SWOPEN )
+/***************************************************************************//**
+ * @brief
+ *   Enable Serial Wire Output (SWO) pin.
+ *
+ * @details
+ *   The SWO pin (sometimes denoted SWV, serial wire viewer) allows for
+ *   miscellaneous output to be passed from the Cortex-M3 debug trace module to
+ *   an external debug probe. By default, the debug trace module and pin output
+ *   may be disabled.
+ *
+ *   Since the SWO pin is only useful when using a debugger, a suggested use
+ *   of this function during startup may be:
+ * @verbatim
+ * if (DBG_Connected())
+ * {
+ * DBG_SWOEnable(1);
+ * }
+ * @endverbatim
+ *   By checking if debugger is attached, some setup leading to higher energy
+ *   consumption when debugger is attached, can be avoided when not using
+ *   a debugger.
+ *
+ *   Another alternative may be to set the debugger tool chain to configure
+ *   the required setup (similar to the content of this function) by some
+ *   sort of toolchain scripting during its attach/reset procedure. In that
+ *   case, the above suggested code for enabling the SWO pin is not required
+ *   in the application.
+ *
+ * @param[in] location
+ *   Pin location used for SWO pin on the application in use.
+ ******************************************************************************/
+void DBG_SWOEnable(unsigned int location)
+{
+  int port;
+  int pin;
+
+  EFM_ASSERT(location < AFCHANLOC_MAX);
+
+  port = AF_DBG_SWO_PORT(location);
+  pin  = AF_DBG_SWO_PIN(location);
+
+  /* Port/pin location not defined for device? */
+  if ((pin < 0) || (port < 0))
+  {
+    EFM_ASSERT(0);
+    return;
+  }
+
+  /* Ensure auxiliary clock going to the Cortex debug trace module is enabled */
+  CMU_OscillatorEnable(cmuOsc_AUXHFRCO, true, false);
+
+  /* Set selected pin location for SWO pin and enable it */
+  GPIO_DbgLocationSet(location);
+  GPIO_DbgSWOEnable(true);
+
+  /* Configure SWO pin for output */
+  GPIO_PinModeSet((GPIO_Port_TypeDef)port, pin, gpioModePushPull, 0);
+}
+#endif
+
+/** @} (end addtogroup DBG) */
+/** @} (end addtogroup EM_Library) */
+#endif /* defined ( CoreDebug_DHCSR_C_DEBUGEN_Msk ) */