Cypress Semiconductor AN6077 Guia do Utilizador descarregar pdf (Página 87)

CY3687 MoBL-USB FX2LP18 Development Kit User Guide, Doc. # 001-68582 Rev. *B 87

MoBL-USB Development Kit Firmware Examples

Figure 8-13. A2 Vendor Command Write Operation using CyControlCenter

2. 0xA3 command-Download data to RAM memory

This command is used to download data to MoBL-USB FX2LP18 internal (0x0000-0x3FFFF)

RAM.

a. Test using CyControlCenter

To write the contents to RAM memory select Direction=OUT Req Type=vendor Target=Device

Bytes to Transfer=8 bytes (data to read) wValue=0x1800(RAM address), Req Code=0xA3 and

enter data to send. For e.g: "C2 B4 04 84 00 01 00 11" in Data to send box. Click on Transfer

Data button and observe the RAM memory getting programmed. Figure 8-14 summarizes the

entire operation.

Figure 8-14. A3 Vendor Command Read Operation using CyControlCenter

To read the contents from RAM memory select Direction=IN Req Type=vendor Target=Device

Bytes to Transfer=8 bytes (data to read) and Req Code=0xA3. Click on Transfer Data button and

observe the RAM memory written previously matches with the read data. Figure 8-15 summa-

rizes the entire operation.

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 106 107

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Cypress Semiconductor AN6077 Guia do Utilizador Página 87