AT32F435使用 RT-Thread给外部SDRAM分配内存堆出现hard fault。

只看该作者 · 2023-9-2 10:50

AT32F435使用 RT-Thread给外部SDRAM分配内存堆出现hard fault。在执行内存堆分配函数rt_memheap_init(&system_heap, "sdram", (void *)SDRAM_BANK_ADDR, SDRAM_SIZE);时出现hard fault。在为执行内存堆分配时测试SDRAM的读写功能正常。求助下这个是什么原因造成的。怎么才能解决，谢谢！
static int sdram_init(void)
{
int result = RT_EOK;
xmc_cmd_bank1_2_type target_bank = XMC_CMD_BANK1;

xmc_sdram_init_type sdram_init_struct;
xmc_sdram_timing_type sdram_timing_struct;

at32_msp_sdram_init(NULL);

/* xmc configuration */
xmc_sdram_default_para_init(&sdram_init_struct, &sdram_timing_struct);

#if SDRAM_TARGET_BANK == 1
sdram_init_struct.sdram_bank = XMC_SDRAM_BANK1;
#else
sdram_init_struct.sdram_bank = XMC_SDRAM_BANK2;
#endif
#if SDRAM_COLUMN_BITS == 8
sdram_init_struct.column_address = XMC_COLUMN_8;
#elif SDRAM_COLUMN_BITS == 9
sdram_init_struct.column_address = XMC_COLUMN_9;
#elif SDRAM_COLUMN_BITS == 10
sdram_init_struct.column_address = XMC_COLUMN_10;
#else
sdram_init_struct.column_address = XMC_COLUMN_11;
#endif
#if SDRAM_ROW_BITS == 11
sdram_init_struct.row_address = XMC_ROW_11;
#elif SDRAM_ROW_BITS == 12
sdram_init_struct.row_address = XMC_ROW_12;
#else
sdram_init_struct.row_address = XMC_ROW_13;
#endif
#if SDRAM_DATA_WIDTH == 8
sdram_init_struct.width = XMC_MEM_WIDTH_8;
#elif SDRAM_DATA_WIDTH == 16
sdram_init_struct.width = XMC_MEM_WIDTH_16;
#endif

sdram_init_struct.internel_banks = XMC_INBK_4;

#if SDRAM_CAS_LATENCY == 1
sdram_init_struct.cas = XMC_CAS_1;
#elif SDRAM_CAS_LATENCY == 2
sdram_init_struct.cas = XMC_CAS_2;
#else
sdram_init_struct.cas = XMC_CAS_3;
#endif
#if SDRAM_RPIPE_DELAY == 0
sdram_init_struct.read_delay = XMC_READ_DELAY_0;
#elif SDRAM_RPIPE_DELAY == 1
sdram_init_struct.read_delay = XMC_READ_DELAY_1;
#else
sdram_init_struct.read_delay = XMC_READ_DELAY_2;
#endif
#if SDCLOCK_PERIOD == 2
sdram_init_struct.clkdiv = XMC_CLKDIV_2;
#else
sdram_init_struct.clkdiv = XMC_CLKDIV_3;
#endif

sdram_init_struct.write_protection = FALSE;
sdram_init_struct.burst_read = TRUE;

sdram_timing_struct.tmrd = LOADTOACTIVEDELAY;
sdram_timing_struct.txsr = EXITSELFREFRESHDELAY;
sdram_timing_struct.tras = SELFREFRESHTIME;
sdram_timing_struct.trc = ROWCYCLEDELAY;
sdram_timing_struct.twr = WRITERECOVERYTIME;
sdram_timing_struct.trp = RPDELAY;
sdram_timing_struct.trcd = RCDDELAY;

xmc_sdram_init(&sdram_init_struct, &sdram_timing_struct);

#if SDRAM_TARGET_BANK == 1
target_bank = XMC_CMD_BANK1;
#else
target_bank = XMC_CMD_BANK2;
#endif

sdram_init_sequence(target_bank);

LOG_D("sdram init success, mapped at 0x%X, size is %d bytes, data width is %d", SDRAM_BANK_ADDR, SDRAM_SIZE, SDRAM_DATA_WIDTH);

#ifdef RT_USING_MEMHEAP_AS_HEAP
/* If RT_USING_MEMHEAP_AS_HEAP is enabled, SDRAM is initialized to the heap */
rt_memheap_init(&system_heap, "sdram", (void *)SDRAM_BANK_ADDR, SDRAM_SIZE);
#endif

return result;
}

INIT_BOARD_EXPORT(sdram_init);