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/**
* \file
* \brief ATXMEGA's ATCA Hardware abstraction layer for SWI interface over UART drivers.
*
* Prerequisite: add UART Polled support to application in Atmel Studio
*
* \copyright (c) 2015-2020 Microchip Technology Inc. and its subsidiaries.
*
* \page License
*
* Subject to your compliance with these terms, you may use Microchip software
* and any derivatives exclusively with Microchip products. It is your
* responsibility to comply with third party license terms applicable to your
* use of third party software (including open source software) that may
* accompany Microchip software.
*
* THIS SOFTWARE IS SUPPLIED BY MICROCHIP "AS IS". NO WARRANTIES, WHETHER
* EXPRESS, IMPLIED OR STATUTORY, APPLY TO THIS SOFTWARE, INCLUDING ANY IMPLIED
* WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A
* PARTICULAR PURPOSE. IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDIRECT,
* SPECIAL, PUNITIVE, INCIDENTAL OR CONSEQUENTIAL LOSS, DAMAGE, COST OR EXPENSE
* OF ANY KIND WHATSOEVER RELATED TO THE SOFTWARE, HOWEVER CAUSED, EVEN IF
* MICROCHIP HAS BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES ARE
* FORESEEABLE. TO THE FULLEST EXTENT ALLOWED BY LAW, MICROCHIP'S TOTAL
* LIABILITY ON ALL CLAIMS IN ANY WAY RELATED TO THIS SOFTWARE WILL NOT EXCEED
* THE AMOUNT OF FEES, IF ANY, THAT YOU HAVE PAID DIRECTLY TO MICROCHIP FOR
* THIS SOFTWARE.
*/
#ifndef SWI_UART_SAMD21_ASF_H_
#define SWI_UART_SAMD21_ASF_H_
#include <asf.h>
#include "cryptoauthlib.h"
/** \defgroup hal_ Hardware abstraction layer (hal_)
*
* \brief
* These methods define the hardware abstraction layer for communicating with a CryptoAuth device
*
@{ */
/** \brief
- this HAL implementation assumes you've included the ASF SERCOM UART libraries in your project, otherwise,
the HAL layer will not compile because the ASF UART drivers are a dependency *
*/
#define MAX_SWI_BUSES 6 // SAMD21 has up to 6 SERCOMS that can be configured as UART
#define RECEIVE_MODE 0 // UART Receive mode, RX enabled
#define TRANSMIT_MODE 1 // UART Transmit mode, RX disabled
#define RX_DELAY 10 // Delay before responses come
#define TX_DELAY 90 // Delay before new flag is sent
#define DEBUG_PIN_1 EXT2_PIN_5
#define DEBUG_PIN_2 EXT2_PIN_6
/** \brief this is the hal_data for ATCA HAL for ASF SERCOM
*/
typedef struct atcaSWImaster
{
// struct usart_module for Atmel SWI interface
struct usart_module usart_instance;
int ref_ct;
// for conveniences during interface release phase
int bus_index;
} ATCASWIMaster_t;
ATCA_STATUS swi_uart_init(ATCASWIMaster_t *instance);
ATCA_STATUS swi_uart_deinit(ATCASWIMaster_t *instance);
void swi_uart_setbaud(ATCASWIMaster_t *instance, uint32_t baudrate);
void swi_uart_mode(ATCASWIMaster_t *instance, uint8_t mode);
void swi_uart_discover_buses(int swi_uart_buses[], int max_buses);
ATCA_STATUS swi_uart_send_byte(ATCASWIMaster_t *instance, uint8_t data);
ATCA_STATUS swi_uart_receive_byte(ATCASWIMaster_t *instance, uint8_t *data);
/** @} */
#endif // SWI_UART_ASF_H