wifiiotuartextraattr.md

# WifiIotUartExtraAttr
## **Overview**
**Related Modules:**
[Wifiiot](wifiiot.md)
**Description:**
Defines the extended attributes of a UART device.
## **Summary**
## Data Fields

Variable Name	Description
txFifoLine	WifiIotUartFifoLine
rxFifoLine	WifiIotUartFifoLine
flowFifoLine	WifiIotUartFifoLine
txBlock	WifiIotUartBlockState
rxBlock	WifiIotUartBlockState
txBufSize	unsigned short
rxBufSize	unsigned short
txUseDma	WifiIotUartDmaState
rxUseDma	WifiIotUartDmaState

## **Details**
## **Field Documentation**
## flowFifoLine
```
[WifiIotUartFifoLine](wifiiot.md#ga1c15f86994b472d35bee5d6b57d42a49) WifiIotUartExtraAttr::flowFifoLine
```
**Description:**
FIFO interrupt threshold for flow control
## rxBlock
```
[WifiIotUartBlockState](wifiiot.md#ga93f35a58dc54e29d4892d1e94179c72d) WifiIotUartExtraAttr::rxBlock
```
**Description:**
Rx block state
## rxBufSize
```
unsigned short WifiIotUartExtraAttr::rxBufSize
```
**Description:**
Rx buffer size
## rxFifoLine
```
[WifiIotUartFifoLine](wifiiot.md#ga1c15f86994b472d35bee5d6b57d42a49) WifiIotUartExtraAttr::rxFifoLine
```
**Description:**
Rx FIFO interrupt threshold
## rxUseDma
```
[WifiIotUartDmaState](wifiiot.md#gaf36ed6a640d85e79dfee020131e0d86f) WifiIotUartExtraAttr::rxUseDma
```
**Description:**
Whether DMA is used to receive data
## txBlock
```
[WifiIotUartBlockState](wifiiot.md#ga93f35a58dc54e29d4892d1e94179c72d) WifiIotUartExtraAttr::txBlock
```
**Description:**
Tx block state
## txBufSize
```
unsigned short WifiIotUartExtraAttr::txBufSize
```
**Description:**
Tx buffer size
## txFifoLine
```
[WifiIotUartFifoLine](wifiiot.md#ga1c15f86994b472d35bee5d6b57d42a49) WifiIotUartExtraAttr::txFifoLine
```
**Description:**
Tx FIFO interrupt threshold
## txUseDma
```
[WifiIotUartDmaState](wifiiot.md#gaf36ed6a640d85e79dfee020131e0d86f) WifiIotUartExtraAttr::txUseDma
```
**Description:**
Whether DMA is used to send data