PSOC E8XXGP Device Support Library

| PSOC E8XXGP Device Support Library

Macros
UART TX FIFO Statuses
PDL API Reference » SCB (Serial Communication Block) » UART (SCB) » Macros

## General Description

Macros to check UART TX FIFO status returned by Cy_SCB_UART_GetTxFifoStatus function or assign mask for Cy_SCB_UART_ClearTxFifoStatus function.

Each UART TX FIFO status is encoded in a separate bit, therefore multiple bits may be set to indicate the current status.

## Macros
#define | CY_SCB_UART_TX_TRIGGER (SCB_INTR_TX_TRIGGER_Msk)
| The number of entries in the TX FIFO is less than the TX FIFO trigger level value.
#define | CY_SCB_UART_TX_NOT_FULL (SCB_INTR_TX_NOT_FULL_Msk)
| The TX FIFO is not full, there is a space for more data.
#define | CY_SCB_UART_TX_EMPTY (SCB_INTR_TX_EMPTY_Msk)
| The TX FIFO is empty, note there may still be data in the shift register.
#define | CY_SCB_UART_TX_OVERFLOW (SCB_INTR_TX_OVERFLOW_Msk)
| An attempt to write to the full TX FIFO.
#define | CY_SCB_UART_TX_UNDERFLOW (SCB_INTR_TX_UNDERFLOW_Msk)
| An attempt to read from an empty transmitter FIFO (hardware reads).
#define | CY_SCB_UART_TX_DONE (SCB_INTR_TX_UART_DONE_Msk)
| All data has been transmitted out of the FIFO, including shifter.
#define | CY_SCB_UART_TX_NACK (SCB_INTR_TX_UART_NACK_Msk)
| SmartCard only: the transmitter received a NACK.
#define | CY_SCB_UART_TX_ARB_LOST (SCB_INTR_TX_UART_ARB_LOST_Msk)
| SmartCard only: the transmitter lost arbitration.