[Hard fault handler00000000 R0 = 00000001 R1 = 000005a7 R2 = 200007a8 R3 = 0000007c R12 = 0000004e LR [R14] (subroutine call return address) = 0800b74f PC [R15] (program counter) = 08005504 PSR = 21000000 BFAR = 200062d8 CFSR = 00008200 HFSR = 40000000 DFSR = 00000000 AFSR = 00000000 SCB_SHCSR = 00000000 impure_ptr = 0801b783 00000026 20000082 0000001a