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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M32C/86 датащи(PDF) 384 Page - Renesas Technology Corp |
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M32C/86 датащи(HTML) 384 Page - Renesas Technology Corp |
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384 / 505 page  Page 361 9 7 4 f o 5 0 0 2 , 8 0 . p e S 0 0 . 1 . v e R 0 0 1 0 - 4 0 2 0 B 9 0 J E R 23. CAN Module ) T 6 8 / C 2 3 M , 6 8 / C 2 3 M ( p u o r G 6 8 / C 2 3 M NEWDATA bit RECREQ bit MBOX3 to MBOX0 bits Start receiving Intermission field CAN bus Receive frame INVALDATA bit RECSUCC bit RECSTATE bit SISj bit (1) (4) (3) Set to "1" by program Bus idle Bus idle Receive frame "1" "0" "1" "0" "1" "0" "1" "0" "1" "0" "1" "0" j=0 to 15 Reception-completed message slot number Reception completed (2) Figure 23.38 Example of CAN Data Frame Transmit Operation 23.3.3 CAN Receive Timing Figure 23.39 shows an operation example of when the CAN receives a frame. (1) When the RECREQ bit in the CiMCTLj register (i=0,1, j= 0 to 15) is set to "1" (receive requested), the CAN is ready to receive the frame at anytime. (2) When the CAN starts receiving the frame, the RECSTATE bit in the CiSTR register is set to "1" (during reception). (3) After the CAN frame reception is completed, the INVALDATA bit in the CiMCTLj register is set to "1" (storing received data), the NEWDATA bit in the CiMCTLj register is set to "1" (receive com- plete) and the RECSUCC bit in the CiSTR register is set to "1" (reception completed). (4) After data is written to the message slot, the INVALDATA bit is set to "0" (storing receiving data) and the SISj bit in the CiSISTR register is set to "1" (interrupt requested). The MBOX3 to MBOX0 bits in the CiSTR register store received message slot numbers. SENTDATA bit TRMREQ bit MBOX3 to MBOX0 bits Bus idle Start transmtting (1) Intermission field CAN bus Transmit frame "1" "0" "1" "0" TRMACTIVE bit "1" "0" Set to "1" by program TRMSUCC bit "1" "0" TRMSTATE bit "1" "0" SISj bit "1" "0" Transmit frame Bus idle j=0 to 15 Transmission-completed message slot number Transmission completed (2) Figure 23.39 Example of CAN Data Frame Receive Operation |
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