怎么解决stm32h743 lcd驱动出现hardfault的问题呢？

使用stm32h743 加入sdram 模块和lcd 驱动模块后 ，使用串口终端测试出现如下现象：

sd0 Block Device 1
uart2 Character Device 0
uart1 Character Device 2
pin Miscellaneous Device 0
msh />lcd_test
psr: 0x81000000
r00: 0x00000004
r01: 0x00000007
r02: 0x000000f8
r03: 0x89a208f6
r04: 0x00000000
r05: 0x2400d81e
r06: 0x080134b5
r07: 0x2400e870
r08: 0x00000001
r09: 0x00000008
r10: 0xdeadbeef
r11: 0xdeadbeef
r12: 0x00000000
lr: 0x0801cbe9
pc: 0x080134c2
hard fault on thread: tshell
thread pri status sp stack size max used left tick error

tshell 20 running 0x0000013c 0x00001000 08% 0x00000007 000
mmcsd_de 22 suspend 0x000000a0 0x00000400 62% 0x0000000e 000
tidle0 31 ready 0x00000058 0x00000400 08% 0x00000013 000
timer 4 suspend 0x00000060 0x00000200 18% 0x00000009 000
main 10 suspend 0x00000084 0x00000800 49% 0x00000011 000
bus fault:
SCB_CFSR_BFSR:0x04 IMPRECISERR

这是什么问题呢？如何查找原因呢？没有思路啊