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PM0214 데이터시트(PDF) 243 Page - STMicroelectronics |
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PM0214 데이터시트(HTML) 243 Page - STMicroelectronics |
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243 / 245 page ![]() DocID022708 Rev 4 243/245 PM0214 Core peripherals 244 } else if(lr == 0xFFFFFFED) { sp = __get_PSP() + 0x60 ; } fpscr_val = *(uint32_t*)sp; { check exception flags } fpscr_val &= (uint32_t)~0x8F ; // Clear all exception flags *(uint32_t*)sp = fpscr_val; __DMB() ; } // FPU IRQ Handler void __asm FPU_IRQHandler(void) { IMPORT FPU_ExceptionHandler MOV R0, LR // move LR to R0 MOV R1, SP // Save SP to R1 to avoid any modification to // the stack pointer from FPU_ExceptionHandler VMRS R2, FPSCR // dummy read access, to force clear B FPU_ExceptionHandler BX LR } |
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