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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST7LITE3XF2 датащи(PDF) 170 Page - STMicroelectronics |
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ST7LITE3XF2 датащи(HTML) 170 Page - STMicroelectronics |
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170 / 173 page  ST7LITE3xF2 170/173 IMPORTANT NOTES (Cont’d) Impact on application Software may execute the interrupt routine twice after header reception. Moreover, in reception mode, as the receiver is no longer in mute mode, an interrupt will be generat- ed on each data byte reception. Workaround The problem can be detected in the LINSCI inter- rupt routine. In case of timeout error (LHE is set and LHLR is loaded with 00h), the software can check the RWU bit in the SCICR2 register. If RWU is cleared, it can be set by software. Refer to Fig- ure 110. Workaround is shown in bold characters. Figure 110. LINSCI Interrupt routine @interrupt void LINSCI_IT ( void ) /* LINSCI interrupt routine */ { /* clear flags */ SCISR_buffer = SCISR; SCIDR_buffer = SCIDR; if ( SCISR_buffer & LHE )/* header error ? */ { if (!LHLR)/* header time-out? */ { if ( !(SCICR2 & RWU) )/* active mode ? */ { _asm("sim");/* disable interrupts */ SCISR; SCIDR;/* Clear RDRF flag */ SCICR2 |= RWU;/* set mute mode */ SCISR; SCIDR;/* Clear RDRF flag */ SCICR2 |= RWU;/* set mute mode */ _asm("rim");/* enable interrupts */ } } } } Example using Cosmic compiler syntax |
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