M2354: Add serial_tx_empty(...)

ccli8 · ccli8 · commit 356c8fdeb3ad · 2021-05-26T09:35:03.000+08:00
Enable serial sync with the below PR: #14600
diff --git a/targets/TARGET_NUVOTON/TARGET_M2354/serial_api.c b/targets/TARGET_NUVOTON/TARGET_M2354/serial_api.c
@@ -508,6 +508,11 @@ int serial_writable(serial_t *obj)
     return ! UART_IS_TX_FULL(((UART_T *) NU_MODBASE(obj->serial.uart)));
 }
 
+int serial_tx_empty(serial_t *obj)
+{
+    return UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart)));
+}
+
 void serial_pinout_tx(PinName tx)
 {
     pinmap_pinout(tx, PinMap_UART_TX);

Original file line number	Diff line number	Diff line change
`@@ -508,6 +508,11 @@ int serial_writable(serial_t *obj)`
`508`	`508`	`return ! UART_IS_TX_FULL(((UART_T *) NU_MODBASE(obj->serial.uart)));`
`509`	`509`	`}`
`510`	`510`
	`511`	`+int serial_tx_empty(serial_t *obj)`
	`512`	`+{`
	`513`	`+ return UART_IS_TX_EMPTY(((UART_T *) NU_MODBASE(obj->serial.uart)));`
	`514`	`+}`
	`515`	`+`
`511`	`516`	`void serial_pinout_tx(PinName tx)`
`512`	`517`	`{`
`513`	`518`	`pinmap_pinout(tx, PinMap_UART_TX);`