参数资料
| 型号： | DLP-245PL-G |
| 厂商： | DLP Design Inc |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | MOD USB-MCU FT245RL W/18LF8722 |
| 产品目录绘图： | DLP-245PL-G |
| 标准包装： | 1 |
| 系列： | USB |
| 模块/板类型： | 开发板 |
| 适用于相关产品： | USB |
| 其它名称： | 813-1005 |
5
TOKEN I/O
The 18LF8722 microcontroller on the DLP-245PL-G is shipped from the factory preprogrammed
with firmware that provides rudimentary access to the port pins via either the VCP or DLL drivers.
Features include the ability to read and write individual port pins as well as 8-bit port reads and
writes.
The firmware in the DLP-245PL-G also provides access to the 18LF8722’s A/D converter,
EEPROM memory, and communications with digital temperature-sensing devices.
Commands sent to the Token I/O firmware must adhere to a specific communications protocol.
Each command sequence contains the following information:
Byte 0:
Number of bytes in command sequence
Byte 1:
Command
Byte 2…n-1:
Parameter/Data bytes
Byte n:
Checksum
The checksum is computed by exclusive-OR-ing every byte in the string. If the same checksum
is calculated by the 18LF8722 upon receipt of the packet, then a single-byte reply of 0x55 is
returned to the host. In the event of a checksum error, the 18LF8722 will return an error code of
0xAA. For example, setting port PIN_A1 high would require the following string of bytes:
0x03, 0xA6, 0x2D, 0x01, 0x89
Definition of the Bytes:
0x03 – Number of bytes in command (checksum excluded)
0xA6 – Command for set port pin high/low
0x29 – Affected port pin
0x01 – Desired state of port pin
0x8D – Checksum of previous 4 bytes
The port pins equate to hexadecimal numeric constants as defined below:
PORT A:
PIN_A0 0x2C, PIN_A1 0x2D, PIN_A2 0x2E,
PIN_A3 0x2F, PIN_A4 0x30, PIN_A5 0x31
PORT B:
PIN_B0 0x34, PIN_B1 0x35, PIN_B2 0x36, PIN_B3 0x37,
PIN_B4 0x38, PIN_B5 0x39, PIN_B6 0x3A, PIN_B7 0x3B
相关PDF资料 |
PDF描述 |
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| DLP-HS-FPGA3 | MODULE USB-TO-FPGA SPARTAN 3A |
| DP83848CVVX/NOPB | TXRX ETHERNET PHYTER 48LQFP |
| DP83848HSQ/NOPB | IC TXRX ETHERNET PHYTER 40-LLP |
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| DLP-245SY | 功能描述:界面模块 USB/Micro Dev Board RoHS:否 制造商:4D Systems 产品:Serial Converters 通道/端口数量: 数据速率: 接口类型:USB, UART 工作电源电压:3.3 V, 5 V 最大工作温度: |
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| DLP-245SY-G-C | 功能描述:界面模块 USB/Micro Dev Board W/GRICH C COMPILER RoHS:否 制造商:4D Systems 产品:Serial Converters 通道/端口数量: 数据速率: 接口类型:USB, UART 工作电源电压:3.3 V, 5 V 最大工作温度: |
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