Configuration pin : 1 ] RS485[UART1(A53)] in M-core : pin_mux.c >> IOMUXC_SetPinMux(IOMUXC_SAI2_RXC_UART1_RX, 0U); IOMUXC_SetPinConfig(IOMUXC_SAI2_RXC_UART1_RX, IOMUXC_SW_PAD_CTL_PAD_DSE(6U) | IOMUXC_SW_PAD_CTL_PAD_FSEL(2U)); IOMUXC_SetPinMux(...
RS485_CLK_ENABLE(); // 使能 USART2 的输入输出和方向引脚的时钟 RS485_GPIO_CLK_EN(); RE_DE_GPIO_CLK_EN(); /**USART2 GPIO Configuration PA2 ---> USART2_TX PA3 ---> USART2_RX */ GPIO_InitStruct.Pin = RS485_TX_PIN; // 选择 USART2 的 TX 引脚 GPIO_InitStruct.Mode = GPIO...
RS232在总线上只允许连接1个收发器,即单站能力,而RS485在总线上允许连接多达128个收发器,即具有多站能力,可以利用单一的RS485方便地建立起设备网络,如图 18.1.1 所示,为RS485通信网络结构。 在RS485通信网络中,通常使用485收发器将TTL电平转换成RS485的差分信号。MCU的串口控制器TxD发送数据,经485收发器转换成差...
MAX3362: +3.3V, High-Speed, RS-485/RS-422Transceiver in a SOT23 Package ♦For Multiple Transceiver Applications:MAX3030E–MAX3033E: ±15kV ESD-Protected,+3.3V, Quad, RS-422 Transmitters MAX3040–MAX3045: ±10kV ESD-Protected, Quad,+5V, RS-485/RS-422 Transmitters Applications RS-422/...
_485_USART_TX_AF; HAL_GPIO_Init(_485_USART_TX_GPIO_PORT, &GPIO_InitStruct); /* 配置Rx引脚为复用功能 */ GPIO_InitStruct.Pin = _485_USART_RX_PIN; GPIO_InitStruct.Alternate = _485_USART_RX_AF; HAL_GPIO_Init(_485_USART_RX_GPIO_PORT...
USB-485B USB 2.0 To RS-485 Adapter – Pin 9 PINOUT CONFIGURATION: RS-485 SIDE – DB9 MALE MALE DB9 SERIALCOMM.COM Datasheet Revision 2.7 GENERAL FEATURES: • Plug-and-Play (hot-pluggable) • Adds one RS-485 port to USB port • Terminal block with optional 120-ohm termination ...
PinConfiguration(TopView) Description TheTPT485Nisalow-powerRS-485transceiverwith automaticbus-polaritycorrectionandtransientprotection. Uponhotplug-in,thedevicedetectsandcorrectsthe buspolaritywithinthefirst100msofbusidling.On-chip transientprotectionprotectsthedeviceagainstIEC61000 ...
Table 1.Serial Adapter Pin Configuration for RS-485 Figure 8 is a diagram of a 9-pin serial port adapter wired for RS-485 half-duplex using pins 1 and 2 for the data. Pin 5 is the ground pin. The COM ports on the developer kit are male, requiring a...
PIN CONFIGURATION提供绿色环保的无铅封装 描述 SIT3490E是一款3.0V~5.5V电源、全双工、低功耗的RS-485收发器,完全符合RS-485/RS-422标准的要求。SIT3490E包含一个驱动器和一个接收器,两者都可以独立传输信号。SIT3490E具有1/8单元负载。它允许总线上最多256个收发器,并允许最高14Mbps的无错误数据传输。SIT3490...
/*485 收发控制引脚*/ #define RS485_RE_GPIO_PORT GPIOB #define RS485_RE_GPIO_CLK RCC_AHB1Periph_GPIOB #define RS485_RE_PIN GPIO_Pin_8 /*中断相关*/ #define RS485_INT_IRQ USART2_IRQn #define RS485_IRQHandler USART2_IRQHandler ...