263 lines
8.4 KiB
C
263 lines
8.4 KiB
C
/**************************************************************************//**
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* @file
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* @brief DVK Peripheral Board Control API implementation
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* @author Energy Micro AS
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* @version 2.0.1
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******************************************************************************
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* @section License
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* <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.com</b>
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*******************************************************************************
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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* 4. The source and compiled code may only be used on Energy Micro "EFM32"
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* microcontrollers and "EFR4" radios.
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*
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* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
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* obligation to support this Software. Energy Micro AS is providing the
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* Software "AS IS", with no express or implied warranties of any kind,
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* including, but not limited to, any implied warranties of merchantability
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* or fitness for any particular purpose or warranties against infringement
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* of any proprietary rights of a third party.
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*
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* Energy Micro AS will not be liable for any consequential, incidental, or
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* special damages, or any other relief, or for any claim by any third party,
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* arising from your use of this Software.
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*
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*****************************************************************************/
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/***************************************************************************//**
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* @addtogroup BSP
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* @{
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******************************************************************************/
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#include "efm32.h"
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#include "dvk.h"
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#include "dvk_boardcontrol.h"
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#include "dvk_bcregisters.h"
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/**************************************************************************//**
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* @brief Enable EFM32 access to periheral on DVK board
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* @param peri Peripheral to enable
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*****************************************************************************/
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void DVK_enablePeripheral(DVKPeripheral peri)
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{
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uint16_t bit;
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uint16_t tmp;
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/* Calculate which bit to set */
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bit = (uint16_t) peri;
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/* Read peripheral control register */
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tmp = DVK_readRegister(BC_PERCTRL);
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/* Enable peripheral */
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tmp |= bit;
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/* Special case for RS232, if enabled disable shutdown */
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if ((peri == DVK_RS232A) || (peri == DVK_RS232B))
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{
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/* clear shutdown bit */
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tmp &= ~(BC_PERCTRL_RS232_SHUTDOWN);
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}
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/* Special case for IRDA if enabled disable shutdown */
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if (peri == DVK_IRDA)
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{
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/* clear shutdown bit */
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tmp &= ~(BC_PERCTRL_IRDA_SHUTDOWN);
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}
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DVK_writeRegister(BC_PERCTRL, tmp);
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}
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/**************************************************************************//**
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* @brief Disable EFM32 access to peripheral on DVK board
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* @param peri Peripheral to disable
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*****************************************************************************/
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void DVK_disablePeripheral(DVKPeripheral peri)
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{
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uint16_t bit;
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uint16_t tmp;
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/* Calculate which bit to set */
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bit = (uint16_t) peri;
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/* Read peripheral control register */
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tmp = DVK_readRegister(BC_PERCTRL);
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/* Disable peripheral */
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tmp &= ~(bit);
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/* Special case for RS232, if enabled disable shutdown */
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if ((peri == DVK_RS232A) || (peri == DVK_RS232B))
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{
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/* Set shutdown bit */
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tmp |= (BC_PERCTRL_RS232_SHUTDOWN);
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}
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/* Special case for IRDA */
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if (peri == DVK_IRDA)
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{
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/* Set shutdown bit */
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tmp |= (BC_PERCTRL_IRDA_SHUTDOWN);
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}
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DVK_writeRegister(BC_PERCTRL, tmp);
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}
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/**************************************************************************//**
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* @brief Enable BUS access
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*****************************************************************************/
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void DVK_enableBus(void)
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{
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/* Enable bus access */
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DVK_writeRegister(BC_BUS_CFG, 1);
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}
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/**************************************************************************//**
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* @brief Disable BUS access
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*****************************************************************************/
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void DVK_disableBus(void)
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{
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DVK_writeRegister(BC_BUS_CFG, 0);
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}
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/**************************************************************************//**
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* @brief Inform AEM about current energy mode
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* @param energyMode What energy mode we are going to use next
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*****************************************************************************/
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void DVK_setEnergyMode(uint16_t energyMode)
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{
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DVK_writeRegister(BC_EM, energyMode);
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}
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/**************************************************************************//**
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* @brief Get status of bush buttons
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* @return Status of push buttons
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*****************************************************************************/
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uint16_t DVK_getPushButtons(void)
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{
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uint16_t pb = 0;
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uint16_t aemState;
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/* Check state */
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aemState = DVK_readRegister(BC_AEMSTATE);
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/* Read pushbutton status */
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if ( aemState == BC_AEMSTATE_EFM )
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{
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pb = (~(DVK_readRegister(BC_PUSHBUTTON))) & 0x000f;
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}
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return pb;
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}
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/**************************************************************************//**
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* @brief Get joystick button status
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* @return Joystick controller status
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*****************************************************************************/
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uint16_t DVK_getJoystick(void)
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{
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uint16_t joyStick = 0;
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uint16_t aemState;
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/* Check state */
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aemState = DVK_readRegister(BC_AEMSTATE);
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/* Read pushbutton status */
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if ( aemState == BC_AEMSTATE_EFM )
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{
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joyStick = (~(DVK_readRegister(BC_JOYSTICK))) & 0x001f;
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}
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return joyStick;
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}
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/**************************************************************************//**
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* @brief Get dipswitch status
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* The DIP switches are free for user programmable purposes
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* @return Joystick controller status
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*****************************************************************************/
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uint16_t DVK_getDipSwitch(void)
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{
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uint16_t tmp;
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tmp = (~(DVK_readRegister(BC_DIPSWITCH))) & 0x00ff;
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return tmp;
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}
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/**************************************************************************//**
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* @brief Sets user leds
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* @param leds 16-bits which enables or disables the board "User leds"
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*****************************************************************************/
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void DVK_setLEDs(uint16_t leds)
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{
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DVK_writeRegister(BC_LED, leds);
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}
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/**************************************************************************//**
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* @brief Get status of user LEDs
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* @return Status of 16 user leds, bit 1 = on, bit 0 = off
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*****************************************************************************/
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uint16_t DVK_getLEDs(void)
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{
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return DVK_readRegister(BC_LED);
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}
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/**************************************************************************//**
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* @brief Enable "Control" buttons/joystick/dip switch interrupts
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* @param flags Board control interrupt flags, BC_INTEN_<something>
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*****************************************************************************/
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void DVK_enableInterrupt(uint16_t flags)
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{
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uint16_t tmp;
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/* Add flags to interrupt enable register */
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tmp = DVK_readRegister(BC_INTEN);
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tmp |= flags;
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DVK_writeRegister(BC_INTEN, tmp);
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}
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/**************************************************************************//**
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* @brief Disable "Control" buttons/joystick/dip switch interrupts
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* @param flags Board control interrupt flags, BC_INTEN_<something>
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*****************************************************************************/
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void DVK_disableInterrupt(uint16_t flags)
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{
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uint16_t tmp;
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/* Clear flags from interrupt enable register */
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tmp = DVK_readRegister(BC_INTEN);
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flags = ~(flags);
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tmp &= flags;
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DVK_writeRegister(BC_INTEN, tmp);
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}
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/**************************************************************************//**
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* @brief Clear interrupts
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* @param flags Board control interrupt flags, BC_INTEN_<something>
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*****************************************************************************/
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void DVK_clearInterruptFlags(uint16_t flags)
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{
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DVK_writeRegister(BC_INTFLAG, flags);
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}
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/**************************************************************************//**
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* @brief Read interrupt flags
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* @return Returns currently triggered interrupts
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*****************************************************************************/
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uint16_t DVK_getInterruptFlags(void)
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{
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return DVK_readRegister(BC_INTFLAG);
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}
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/** @} (end group BSP) */
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