| 摘要 |
PROBLEM TO BE SOLVED: To recover a state before user program stop when executing a user program is re-executed, after interruption processing to the user program in a stop mode state. SOLUTION: The confirmation of interrupt processing during the execution of the user program is performed (S1). The stop of the user program is confirmed by the interrupt processing and an operating mode (normal mode or stop mode) before the stop is read (S2). Furthermore, the state information of save is read into a stack area with the generation of an interrupt (S3). The interrupt processing is executed, the re-execution of the user program is confirmed (S4), the return address of the stack area is changed into dummy return address (S7) by confirming the stop mode of the state before stop (S5), and an instruction for branching with no condition is written at the return address of the user program (S9). Afterwards, a return instruction is executed, and processing for re-executing the user program again is started (S6). |
