I'm writing PSOC5 UART driver with PSOC Creator4.When I build project,message shows en error which is UART_RX_STS_FIFO_NOTEMPTY undeclared.Additionally,message says that 'UART_XXX_DisabelRxInt','UART_XXX_EnableRxInt','UART_XXX_DisabelTxInt'and'UART_XXX_EnableTxInt' are all implicit declaration.
Welcome in the forum.
Probably a typo. Is your interface named "UART" or "UART_1"?
When got stuck, please post your complete project, so that we all can have a look at all of your settings. To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file.