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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST92F124 датащи(PDF) 179 Page - STMicroelectronics |
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ST92F124 датащи(HTML) 179 Page - STMicroelectronics |
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179 / 426 page  179/426 EXTENDED FUNCTION TIMER (EFT) EXTENDED FUNCTION TIMER (Cont’d) Note: A single access (read/write) to the SR regis- ter at the beginning of the interrupt routine is the first step needed to clear all the EFT interrupt flags. In a second step, the lower bytes of the data registers must be accessed if the corresponding flag is set. It is not necessary to access the SR register between these instructions, but it can done. ; INTERRUPT ROUTINE EXAMPLE push R234 ; Save current page spp #28 ; Set EFT page L6: cp R254,#0 ; while E0_SR is not cleared jxz L7 tm R254,#128 ; Check Input Capture 1 flag jxz L2 ; else go to next test ld r1,R241 ; Dummy read to clear IC1LR ; Insert your code here L2: tm R254,#16 ; Check Input Capture 2 flag jxz L3 ; else go to next test ld r1,R243 ; Dummy read to clear IC2LR ; Insert your code here L3: tm R254,#64 ; Check Input Compare 1 flag jxz L4 ; else go to next test ld r1,R249 ; Dummy read to clear OC1LR ; Insert your code here L4: tm R254,#8 ; Check Input Compare 2 flag jxz L5 ; else go to next test ld r1,R251 ; Dummy read to clear OC1LR ; Insert your code here L5: tm R254,#32 ; Check Input Overflow flag jxz L6 ; else go to next test ld r1,R245 ; Dummy read to clear Overflow flag ; Insert your code here jx L6 L7: pop R234 ; Restore current page iret 9 |
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