#define SAMPLE_FREQUENCY 16000
#define NUMBER_OF_CHANNELS 1
#define SAMPLE_BIT_WIDTH 16
#define BYTES_PER_SAMPLE sizeof(int16_t)
#define SAMPLES_PER_BLOCK ((SAMPLE_FREQUENCY / 10) * NUMBER_OF_CHANNELS)
#define ZEPHYR_AUDIO_BLOCK_COUNT ZEPHYR_AUDIO_INITIAL_BLOCKS + 32
#define SLAB_BUFFER_SIZE (ZEPHYR_AUDIO_BLOCK_SIZE * ZEPHYR_AUDIO_BLOCK_COUNT)
static uint8_t __attribute__((section("OCRAM"))) rx_slab_buffer[SLAB_BUFFER_SIZE];
static uint8_t __attribute__((section("OCRAM"))) tx_slab_buffer[SLAB_BUFFER_SIZE];
При компиляции:
[7/7] Linking C executable zephyr/zephyr.elf
Memory region Used Size Region Size %age Used
FLASH: 1170252 B 4 MB 27.90%
RAM: 321116 B 32 MB 0.96%
ITCM: 7880 B 32 KB 24.05%
DTCM: 83584 B 160 KB 51.02%
OCRAM: 3392 B 64 KB 5.18%
IDT_LIST: 0 GB 32 KB 0.00%
При работе:
s_good(slab, slab->free_list)] @ WEST_TOPDIR/zephyr/kernel/mem_slab.c:234
slab corruption detected
[00:00:25.116,000] <err> os: r0/a1: 0x00000004 r1/a2: 0x000000ea r2/a3: 0x00000002
[00:00:25.116,000] <err> os: r3/a4: 0x00000004 r12/ip: 0x0000621c r14/lr: 0x6003b7df
[00:00:25.116,000] <err> os: xpsr: 0x01000016
[00:00:25.116,000] <err> os: s[ 0]: 0x8001950c s[ 1]: 0x80024744 s[ 2]: 0x00000000 s[ 3]: 0x800041ac
[00:00:25.116,000] <err> os: s[ 4]: 0x600d75b0 s[ 5]: 0x00000000 s[ 6]: 0x80024740 s[ 7]: 0x00000000
[00:00:25.116,000] <err> os: s[ 8]: 0x80004300 s[ 9]: 0x60031f23 s[10]: 0x600d75b0 s[11]: 0x00000005
[00:00:25.116,000] <err> os: s[12]: 0x00000061 s[13]: 0x20201060 s[14]: 0x00000000 s[15]: 0x600d7424
[00:00:25.116,000] <err> os: fpscr: 0x600dada8
[00:00:25.116,000] <err> os: Faulting instruction address (r15/pc): 0x600bd1d4
[00:00:25.116,000] <err> os: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
[00:00:25.116,000] <err> os: Fault during interrupt handling
Это неудивительно, т.к. буфера slab i2s должны занимать намного больше места в OCRAM, а при компиляции пишет 3392B
