Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_dbg.c@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 2 * @file em_dbg.c
<> 144:ef7eb2e8f9f7 3 * @brief Debug (DBG) Peripheral API
<> 144:ef7eb2e8f9f7 4 * @version 4.2.1
<> 144:ef7eb2e8f9f7 5 *******************************************************************************
<> 144:ef7eb2e8f9f7 6 * @section License
<> 144:ef7eb2e8f9f7 7 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
<> 144:ef7eb2e8f9f7 8 *******************************************************************************
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Permission is granted to anyone to use this software for any purpose,
<> 144:ef7eb2e8f9f7 11 * including commercial applications, and to alter it and redistribute it
<> 144:ef7eb2e8f9f7 12 * freely, subject to the following restrictions:
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * 1. The origin of this software must not be misrepresented; you must not
<> 144:ef7eb2e8f9f7 15 * claim that you wrote the original software.
<> 144:ef7eb2e8f9f7 16 * 2. Altered source versions must be plainly marked as such, and must not be
<> 144:ef7eb2e8f9f7 17 * misrepresented as being the original software.
<> 144:ef7eb2e8f9f7 18 * 3. This notice may not be removed or altered from any source distribution.
<> 144:ef7eb2e8f9f7 19 *
<> 144:ef7eb2e8f9f7 20 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
<> 144:ef7eb2e8f9f7 21 * obligation to support this Software. Silicon Labs is providing the
<> 144:ef7eb2e8f9f7 22 * Software "AS IS", with no express or implied warranties of any kind,
<> 144:ef7eb2e8f9f7 23 * including, but not limited to, any implied warranties of merchantability
<> 144:ef7eb2e8f9f7 24 * or fitness for any particular purpose or warranties against infringement
<> 144:ef7eb2e8f9f7 25 * of any proprietary rights of a third party.
<> 144:ef7eb2e8f9f7 26 *
<> 144:ef7eb2e8f9f7 27 * Silicon Labs will not be liable for any consequential, incidental, or
<> 144:ef7eb2e8f9f7 28 * special damages, or any other relief, or for any claim by any third party,
<> 144:ef7eb2e8f9f7 29 * arising from your use of this Software.
<> 144:ef7eb2e8f9f7 30 *
<> 144:ef7eb2e8f9f7 31 ******************************************************************************/
<> 144:ef7eb2e8f9f7 32
<> 144:ef7eb2e8f9f7 33 #include "em_dbg.h"
<> 144:ef7eb2e8f9f7 34
<> 144:ef7eb2e8f9f7 35 #if defined( CoreDebug_DHCSR_C_DEBUGEN_Msk )
<> 144:ef7eb2e8f9f7 36
<> 144:ef7eb2e8f9f7 37 #include "em_assert.h"
<> 144:ef7eb2e8f9f7 38 #include "em_cmu.h"
<> 144:ef7eb2e8f9f7 39 #include "em_gpio.h"
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 42 * @addtogroup EM_Library
<> 144:ef7eb2e8f9f7 43 * @{
<> 144:ef7eb2e8f9f7 44 ******************************************************************************/
<> 144:ef7eb2e8f9f7 45
<> 144:ef7eb2e8f9f7 46 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 47 * @addtogroup DBG
<> 144:ef7eb2e8f9f7 48 * @brief Debug (DBG) Peripheral API
<> 144:ef7eb2e8f9f7 49 * @{
<> 144:ef7eb2e8f9f7 50 ******************************************************************************/
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 /*******************************************************************************
<> 144:ef7eb2e8f9f7 53 ************************** GLOBAL FUNCTIONS *******************************
<> 144:ef7eb2e8f9f7 54 ******************************************************************************/
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56 #if defined( GPIO_ROUTE_SWOPEN ) || defined( GPIO_ROUTEPEN_SWVPEN )
<> 144:ef7eb2e8f9f7 57 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 58 * @brief
<> 144:ef7eb2e8f9f7 59 * Enable Serial Wire Output (SWO) pin.
<> 144:ef7eb2e8f9f7 60 *
<> 144:ef7eb2e8f9f7 61 * @details
<> 144:ef7eb2e8f9f7 62 * The SWO pin (sometimes denoted SWV, serial wire viewer) allows for
<> 144:ef7eb2e8f9f7 63 * miscellaneous output to be passed from the Cortex-M3 debug trace module to
<> 144:ef7eb2e8f9f7 64 * an external debug probe. By default, the debug trace module and pin output
<> 144:ef7eb2e8f9f7 65 * may be disabled.
<> 144:ef7eb2e8f9f7 66 *
<> 144:ef7eb2e8f9f7 67 * Since the SWO pin is only useful when using a debugger, a suggested use
<> 144:ef7eb2e8f9f7 68 * of this function during startup may be:
<> 144:ef7eb2e8f9f7 69 * @verbatim
<> 144:ef7eb2e8f9f7 70 * if (DBG_Connected())
<> 144:ef7eb2e8f9f7 71 * {
<> 144:ef7eb2e8f9f7 72 * DBG_SWOEnable(1);
<> 144:ef7eb2e8f9f7 73 * }
<> 144:ef7eb2e8f9f7 74 * @endverbatim
<> 144:ef7eb2e8f9f7 75 * By checking if debugger is attached, some setup leading to higher energy
<> 144:ef7eb2e8f9f7 76 * consumption when debugger is attached, can be avoided when not using
<> 144:ef7eb2e8f9f7 77 * a debugger.
<> 144:ef7eb2e8f9f7 78 *
<> 144:ef7eb2e8f9f7 79 * Another alternative may be to set the debugger tool chain to configure
<> 144:ef7eb2e8f9f7 80 * the required setup (similar to the content of this function) by some
<> 144:ef7eb2e8f9f7 81 * sort of toolchain scripting during its attach/reset procedure. In that
<> 144:ef7eb2e8f9f7 82 * case, the above suggested code for enabling the SWO pin is not required
<> 144:ef7eb2e8f9f7 83 * in the application.
<> 144:ef7eb2e8f9f7 84 *
<> 144:ef7eb2e8f9f7 85 * @param[in] location
<> 144:ef7eb2e8f9f7 86 * Pin location used for SWO pin on the application in use.
<> 144:ef7eb2e8f9f7 87 ******************************************************************************/
<> 144:ef7eb2e8f9f7 88 void DBG_SWOEnable(unsigned int location)
<> 144:ef7eb2e8f9f7 89 {
<> 144:ef7eb2e8f9f7 90 int port;
<> 144:ef7eb2e8f9f7 91 int pin;
<> 144:ef7eb2e8f9f7 92
<> 144:ef7eb2e8f9f7 93 EFM_ASSERT(location < AFCHANLOC_MAX);
<> 144:ef7eb2e8f9f7 94
<> 144:ef7eb2e8f9f7 95 #if defined ( AF_DBG_SWO_PORT )
<> 144:ef7eb2e8f9f7 96 port = AF_DBG_SWO_PORT(location);
<> 144:ef7eb2e8f9f7 97 pin = AF_DBG_SWO_PIN(location);
<> 144:ef7eb2e8f9f7 98 #elif defined (AF_DBG_SWV_PORT )
<> 144:ef7eb2e8f9f7 99 port = AF_DBG_SWV_PORT(location);
<> 144:ef7eb2e8f9f7 100 pin = AF_DBG_SWV_PIN(location);
<> 144:ef7eb2e8f9f7 101 #else
<> 144:ef7eb2e8f9f7 102 #warning "AF debug port is not defined."
<> 144:ef7eb2e8f9f7 103 #endif
<> 144:ef7eb2e8f9f7 104
<> 144:ef7eb2e8f9f7 105 /* Port/pin location not defined for device? */
<> 144:ef7eb2e8f9f7 106 if ((pin < 0) || (port < 0))
<> 144:ef7eb2e8f9f7 107 {
<> 144:ef7eb2e8f9f7 108 EFM_ASSERT(0);
<> 144:ef7eb2e8f9f7 109 return;
<> 144:ef7eb2e8f9f7 110 }
<> 144:ef7eb2e8f9f7 111
<> 144:ef7eb2e8f9f7 112 /* Ensure auxiliary clock going to the Cortex debug trace module is enabled */
<> 144:ef7eb2e8f9f7 113 CMU_OscillatorEnable(cmuOsc_AUXHFRCO, true, false);
<> 144:ef7eb2e8f9f7 114
<> 144:ef7eb2e8f9f7 115 /* Set selected pin location for SWO pin and enable it */
<> 144:ef7eb2e8f9f7 116 GPIO_DbgLocationSet(location);
<> 144:ef7eb2e8f9f7 117 GPIO_DbgSWOEnable(true);
<> 144:ef7eb2e8f9f7 118
<> 144:ef7eb2e8f9f7 119 /* Configure SWO pin for output */
<> 144:ef7eb2e8f9f7 120 GPIO_PinModeSet((GPIO_Port_TypeDef)port, pin, gpioModePushPull, 0);
<> 144:ef7eb2e8f9f7 121 }
<> 144:ef7eb2e8f9f7 122 #endif
<> 144:ef7eb2e8f9f7 123
<> 144:ef7eb2e8f9f7 124 /** @} (end addtogroup DBG) */
<> 144:ef7eb2e8f9f7 125 /** @} (end addtogroup EM_Library) */
<> 144:ef7eb2e8f9f7 126 #endif /* defined( CoreDebug_DHCSR_C_DEBUGEN_Msk ) */