1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
/**
* \file
*
* \brief
*
* \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_START_H_
#define SWI_UART_START_H_
#include <stdlib.h>
//#include <hri_sercom_v200.h>
#include "atmel_start.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
#define TX_DELAY 93
/** \brief this is the hal_data for ATCA HAL for ASF SERCOM
*/
typedef struct atcaSWImaster
{
// struct usart_module for Atmel SWI interface
struct usart_sync_descriptor USART_SWI;
uint32_t sercom_core_freq;
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_START_H_