wolfssl-w32/IDE/iotsafe/main.c

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/* main.c
*
* Copyright (C) 2006-2023 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
*/
/* IoT-safe example
* main for STM32L4
*/
#include <stdio.h>
#include "devices.h"
#include <wolfssl/wolfcrypt/settings.h>
#include <wolfssl/ssl.h>
#include <wolfssl/wolfcrypt/random.h>
#include <wolfssl/wolfcrypt/port/iotsafe/iotsafe.h>
#define STDIO USART2_BASE
#define MODEM USART1_BASE
#define RX_TIMEOUT 100
extern volatile unsigned long jiffies;
int usart1_read(char *buf, int len)
{
int i = 0;
char c;
int ret;
volatile unsigned long start = jiffies;
memset(buf, 0, len);
do {
ret = usart_rx(MODEM, &c);
if (ret > 0) {
buf[i++] = c;
if (c == '\n') {
return i;
}
} else {
__asm__ volatile("wfi");
}
} while(((jiffies - start) < RX_TIMEOUT) && (i < len));
if (i == 0) {
return 0;
}
return i;
}
int usart1_write(const char *buf, int len)
{
int i = 0;
do {
usart_tx(MODEM, buf[i++]);
} while(i < len);
return len;
}
extern int memory_tls_test(void);
void main(void)
{
uint32_t last_mark = 0;
int i;
uint8_t randombytes[16];
int ret;
char c;
WC_RNG rng;
clock_pll_on();
systick_enable();
if (usart_init(STDIO, 115200, 8, 'N', 1) < 0)
while(1)
;
printf("wolfSSL IoT-SAFE demo\n");
printf("Press a key to continue...\n");
do {
ret = usart_rx(STDIO, &c);
} while (ret <= 0);
printf("%c\n", c);
printf("Initializing modem...\n");
stmod_modem_enable();
sleep_ms(1000);
printf("System up and running\r\n");
sleep_ms(1000);
printf("Initializing wolfSSL...\n");
wolfSSL_Init();
wolfSSL_Debugging_ON();
printf("Initializing modem port\n");
if(usart_init(MODEM, 115200, 8, 'N', 1) < 0)
while(1)
;
printf("Initializing IoTSafe I/O...\n");
wolfIoTSafe_SetCSIM_read_cb(usart1_read);
wolfIoTSafe_SetCSIM_write_cb(usart1_write);
/* IoT-Safe system up and running. */
printf("Initializing RNG...\n");
wc_InitRng(&rng);
printf("Getting RND...\n");
wc_RNG_GenerateBlock(&rng, randombytes, 16);
wc_FreeRng(&rng);
printf("Random bytes: ");
for (i = 0; i < 16; i++) {
printf("%02X", randombytes[i]);
}
printf("\n");
memory_tls_test();
while(1) {
if (usart_rx(STDIO, &c)) {
usart_tx(MODEM, c);
usart_tx(STDIO, c);
}
if (usart_rx(MODEM, &c)) {
usart_tx(STDIO, c);
}
__asm__ volatile("wfi");
}
}