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/**************************************************************************//**
* @file
* @brief DVK Peripheral Board Control API implementation
* @author Energy Micro AS
* @version 2.0.1
******************************************************************************
* @section License
* <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.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.
* 4. The source and compiled code may only be used on Energy Micro "EFM32"
* microcontrollers and "EFR4" radios.
*
* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
* obligation to support this Software. Energy Micro AS 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.
*
* Energy Micro AS 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.
*
*****************************************************************************/
/***************************************************************************//**
* @addtogroup BSP
* @{
******************************************************************************/
#include "efm32.h"
#include "dvk.h"
#include "dvk_boardcontrol.h"
#include "dvk_bcregisters.h"
/**************************************************************************//**
* @brief Enable EFM32 access to periheral on DVK board
* @param peri Peripheral to enable
*****************************************************************************/
void DVK_enablePeripheral(DVKPeripheral peri)
{
uint16_t bit;
uint16_t tmp;
/* Calculate which bit to set */
bit = (uint16_t) peri;
/* Read peripheral control register */
tmp = DVK_readRegister(BC_PERCTRL);
/* Enable peripheral */
tmp |= bit;
/* Special case for RS232, if enabled disable shutdown */
if ((peri == DVK_RS232A) || (peri == DVK_RS232B))
{
/* clear shutdown bit */
tmp &= ~(BC_PERCTRL_RS232_SHUTDOWN);
}
/* Special case for IRDA if enabled disable shutdown */
if (peri == DVK_IRDA)
{
/* clear shutdown bit */
tmp &= ~(BC_PERCTRL_IRDA_SHUTDOWN);
}
DVK_writeRegister(BC_PERCTRL, tmp);
}
/**************************************************************************//**
* @brief Disable EFM32 access to peripheral on DVK board
* @param peri Peripheral to disable
*****************************************************************************/
void DVK_disablePeripheral(DVKPeripheral peri)
{
uint16_t bit;
uint16_t tmp;
/* Calculate which bit to set */
bit = (uint16_t) peri;
/* Read peripheral control register */
tmp = DVK_readRegister(BC_PERCTRL);
/* Disable peripheral */
tmp &= ~(bit);
/* Special case for RS232, if enabled disable shutdown */
if ((peri == DVK_RS232A) || (peri == DVK_RS232B))
{
/* Set shutdown bit */
tmp |= (BC_PERCTRL_RS232_SHUTDOWN);
}
/* Special case for IRDA */
if (peri == DVK_IRDA)
{
/* Set shutdown bit */
tmp |= (BC_PERCTRL_IRDA_SHUTDOWN);
}
DVK_writeRegister(BC_PERCTRL, tmp);
}
/**************************************************************************//**
* @brief Enable BUS access
*****************************************************************************/
void DVK_enableBus(void)
{
/* Enable bus access */
DVK_writeRegister(BC_BUS_CFG, 1);
}
/**************************************************************************//**
* @brief Disable BUS access
*****************************************************************************/
void DVK_disableBus(void)
{
DVK_writeRegister(BC_BUS_CFG, 0);
}
/**************************************************************************//**
* @brief Inform AEM about current energy mode
* @param energyMode What energy mode we are going to use next
*****************************************************************************/
void DVK_setEnergyMode(uint16_t energyMode)
{
DVK_writeRegister(BC_EM, energyMode);
}
/**************************************************************************//**
* @brief Get status of bush buttons
* @return Status of push buttons
*****************************************************************************/
uint16_t DVK_getPushButtons(void)
{
uint16_t pb = 0;
uint16_t aemState;
/* Check state */
aemState = DVK_readRegister(BC_AEMSTATE);
/* Read pushbutton status */
if ( aemState == BC_AEMSTATE_EFM )
{
pb = (~(DVK_readRegister(BC_PUSHBUTTON))) & 0x000f;
}
return pb;
}
/**************************************************************************//**
* @brief Get joystick button status
* @return Joystick controller status
*****************************************************************************/
uint16_t DVK_getJoystick(void)
{
uint16_t joyStick = 0;
uint16_t aemState;
/* Check state */
aemState = DVK_readRegister(BC_AEMSTATE);
/* Read pushbutton status */
if ( aemState == BC_AEMSTATE_EFM )
{
joyStick = (~(DVK_readRegister(BC_JOYSTICK))) & 0x001f;
}
return joyStick;
}
/**************************************************************************//**
* @brief Get dipswitch status
* The DIP switches are free for user programmable purposes
* @return Joystick controller status
*****************************************************************************/
uint16_t DVK_getDipSwitch(void)
{
uint16_t tmp;
tmp = (~(DVK_readRegister(BC_DIPSWITCH))) & 0x00ff;
return tmp;
}
/**************************************************************************//**
* @brief Sets user leds
* @param leds 16-bits which enables or disables the board "User leds"
*****************************************************************************/
void DVK_setLEDs(uint16_t leds)
{
DVK_writeRegister(BC_LED, leds);
}
/**************************************************************************//**
* @brief Get status of user LEDs
* @return Status of 16 user leds, bit 1 = on, bit 0 = off
*****************************************************************************/
uint16_t DVK_getLEDs(void)
{
return DVK_readRegister(BC_LED);
}
/**************************************************************************//**
* @brief Enable "Control" buttons/joystick/dip switch interrupts
* @param flags Board control interrupt flags, BC_INTEN_<something>
*****************************************************************************/
void DVK_enableInterrupt(uint16_t flags)
{
uint16_t tmp;
/* Add flags to interrupt enable register */
tmp = DVK_readRegister(BC_INTEN);
tmp |= flags;
DVK_writeRegister(BC_INTEN, tmp);
}
/**************************************************************************//**
* @brief Disable "Control" buttons/joystick/dip switch interrupts
* @param flags Board control interrupt flags, BC_INTEN_<something>
*****************************************************************************/
void DVK_disableInterrupt(uint16_t flags)
{
uint16_t tmp;
/* Clear flags from interrupt enable register */
tmp = DVK_readRegister(BC_INTEN);
flags = ~(flags);
tmp &= flags;
DVK_writeRegister(BC_INTEN, tmp);
}
/**************************************************************************//**
* @brief Clear interrupts
* @param flags Board control interrupt flags, BC_INTEN_<something>
*****************************************************************************/
void DVK_clearInterruptFlags(uint16_t flags)
{
DVK_writeRegister(BC_INTFLAG, flags);
}
/**************************************************************************//**
* @brief Read interrupt flags
* @return Returns currently triggered interrupts
*****************************************************************************/
uint16_t DVK_getInterruptFlags(void)
{
return DVK_readRegister(BC_INTFLAG);
}
/** @} (end group BSP) */
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