/* ---------------------------------------------------------------------------- | |
* SAM Software Package License | |
* ---------------------------------------------------------------------------- | |
* Copyright (c) 2015, Atmel Corporation | |
* | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are met: | |
* | |
* - Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the disclaimer below. | |
* | |
* Atmel's name may not be used to endorse or promote products derived from | |
* this software without specific prior written permission. | |
* | |
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR | |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE | |
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, | |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, | |
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* ---------------------------------------------------------------------------- | |
*/ | |
/*------------------------------------------------------------------------------ | |
* Headers | |
*------------------------------------------------------------------------------*/ | |
#include "chip.h" | |
#include "peripherals/flexcom.h" | |
#include "peripherals/usart.h" | |
#include "peripherals/spi.h" | |
#include "peripherals/twi.h" | |
#include <assert.h> | |
/*------------------------------------------------------------------------------ | |
* Exported functions | |
*------------------------------------------------------------------------------*/ | |
/** | |
* \brief Select a protocol for a FLEXCOM device | |
* | |
* | |
* \param flexcom Pointer to FLEXCOM peripheral to configure. | |
* \param protocol Protocol to use. | |
*/ | |
void flexcom_select(Flexcom * flexcom, uint32_t protocol) | |
{ | |
assert(flexcom); | |
uint32_t current_protocol = flexcom->FLEX_MR; | |
usart_set_receiver_enabled(&flexcom->usart, 0u); | |
/* Shutdown previous protocol */ | |
switch (current_protocol) { | |
case FLEX_MR_OPMODE_USART: | |
usart_set_receiver_enabled(&flexcom->usart, 0u); | |
usart_set_transmitter_enabled(&flexcom->usart, 0u); | |
break; | |
case FLEX_MR_OPMODE_SPI: | |
spi_disable(&flexcom->spi); | |
break; | |
case FLEX_MR_OPMODE_TWI: | |
twi_stop(&flexcom->twi); | |
default: | |
break; | |
} | |
assert(protocol & FLEX_MR_OPMODE_NO_COM || | |
protocol & FLEX_MR_OPMODE_USART || | |
FLEX_MR_OPMODE_SPI || FLEX_MR_OPMODE_TWI); | |
/* Activate the new mode () */ | |
flexcom->FLEX_MR = protocol; | |
} |