1 /*
2 * Copyright 2023 NXP
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <stdio.h>
8 #include <zephyr/linker/section_tags.h>
9 #include "memc_nxp_flexram.h"
10 #include <zephyr/kernel.h>
11 #include <zephyr/console/console.h>
12 #include <zephyr/cache.h>
13
14 K_SEM_DEFINE(dtcm_magic, 0, 1);
15
16 __dtcm_bss_section uint8_t var;
17 int cnt;
18
flexram_magic_addr_isr_cb(enum memc_flexram_interrupt_cause cause,void * data)19 void flexram_magic_addr_isr_cb(enum memc_flexram_interrupt_cause cause,
20 void *data)
21 {
22 ARG_UNUSED(data);
23
24 if (cause == flexram_dtcm_magic_addr) {
25 printf("Magic DTCM address accessed %d times\n", ++cnt);
26 k_sem_give(&dtcm_magic);
27 }
28 }
29
main(void)30 int main(void)
31 {
32 memc_flexram_register_callback(flexram_magic_addr_isr_cb, NULL);
33
34 console_init();
35
36 printf("%s is opening spellbook...\n", CONFIG_BOARD);
37 printf("Cast some characters:\n");
38
39 uint32_t dtcm_addr = (uint32_t)&var;
40
41 memc_flexram_set_dtcm_magic_addr(dtcm_addr);
42
43 uint8_t tmp;
44
45 while (1) {
46 printf("\n");
47 tmp = console_getchar();
48 printf("Writing %c to magic addr...\n", tmp);
49 var = tmp;
50 k_sem_take(&dtcm_magic, K_FOREVER);
51 printf("Reading from magic addr...\n");
52 printf("Magic variable got: %c\n", var);
53 k_sem_take(&dtcm_magic, K_FOREVER);
54 }
55
56 return 0;
57 }
58
