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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN4494 датащи(PDF) 12 Page - STMicroelectronics |
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AN4494 датащи(HTML) 12 Page - STMicroelectronics |
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12 / 34 page  SPI interface AN4494 3 SPI interface 3.1 Test case specification identifier SPI_TEST 3.2 Test prerequisite The customer's platform should have the SPI test points (see Table 1: "Test points" and Figure 2: "SPI connection": SPI connection below). 3.3 Test description How to verify that SPI access from an external microcontroller is functional. 3.4 Test setup 3.4.1 Hardware STEVAL-IDB002V1 motherboard, to be connected to the BlueNRG board as showed below: Figure 2: SPI connection 3.4.2 Software ST BlueNRG GUI, to send SPI commands to the BlueNRG. 3.5 Test procedure A BlueNRG hardware reset, performed by the microcontroller, generates an ACI event with a sequence described below and shown in Figure 3: "BlueNRG SPI transaction on HW reset": 1. Release of hardware reset 2. IRQ goes high to signal an event from BlueNRG (if this signal is not present, it means that the BlueNRG firmware for some reason is not running) 3. The external microcontroller lowers CS to access the BlueNRG and read the event 4. The microcontroller reads 5 bytes from SPI; they should be [02,7F,00,00,00] 5. The external microcontroller, after raising the CS, lowers it again to access the BlueNRG and read the event 12/34 DocID026361 Rev 3 |
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