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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP2120 датащи(PDF) 40 Page - Microchip Technology |
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MCP2120 датащи(HTML) 40 Page - Microchip Technology |
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40 / 64 page  MCP2120/MCP2150 USER’S GUIDE DS51246A-page 36 2001 Microchip Technology Inc. 3.6.1. System Debug Tips If you are not getting communications between the two boards, some debugging is in order. Here are some suggested steps: • Verify that the Hyperterminal programs are set up correctly • Verify that both Hyperterminal sessions are “connected” • Verify that the MCP2120 Developer’s Boards are powered • Verify that the MCP2120 Developer’s Boards are set up correctly If that review does not locate the issue, then more in depth debugging is required. These steps require an oscilloscope. A digital 4-channel oscilloscope is recommended. By typing a data byte into Hyperterminal on the PC, the oscilloscope can be used to determine where in the system the data byte was “lost”. Figure 3.19 and Figure 3.20 shows a debug flow to help troubleshoot the communications between the two MCP2120 Developer’s Boards. Figure 3.19 shows the steps for the transmit side of System #1 (PC #1 and MCP2120 Developer’s Board #1). If it appears that the TXIR signal is correct, then the receive side needs to be validated. Figure 3.20 shows the steps for the receive side of System #2 (PC #2 and MCP2120 Developer’s Board #2). These steps can then be used to debug the transmit side of System #2 and the receive side of System #1. |
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