K64F UART Asynch API: Fix synchronization issue

mmahadevan108 · mmahadevan108 · commit 8c71fbc07f34 · 2017-01-10T10:45:28.000-06:00
The UART state should be set to busy before starting the transfer

Signed-off-by: Mahadevan Mahesh &lt;Mahesh.Mahadevan@nxp.com&gt;
diff --git a/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/serial_api.c b/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/serial_api.c
@@ -518,9 +518,10 @@ int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx
         }
     }
 
+    obj->serial.txstate = kUART_TxBusy;
+
     /* Start the transfer */
     serial_send_asynch(obj);
-    obj->serial.txstate = kUART_TxBusy;
 
     return 0;
 }
@@ -583,9 +584,10 @@ void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_widt
         }
     }
 
+    obj->serial.rxstate = kUART_RxBusy;
+
     /* Start the transfer */
     serial_receive_asynch(obj);
-    obj->serial.rxstate = kUART_RxBusy;
 }
 
 uint8_t serial_tx_active(serial_t *obj)

Original file line number	Diff line number	Diff line change
`@@ -518,9 +518,10 @@ int serial_tx_asynch(serial_t obj, const void tx, size_t tx_length, uint8_t tx`
`518`	`518`	`}`
`519`	`519`	`}`
`520`	`520`
	`521`	`+ obj->serial.txstate = kUART_TxBusy;`
	`522`	`+`
`521`	`523`	`/* Start the transfer */`
`522`	`524`	`serial_send_asynch(obj);`
`523`		`- obj->serial.txstate = kUART_TxBusy;`
`524`	`525`
`525`	`526`	`return 0;`
`526`	`527`	`}`
`@@ -583,9 +584,10 @@ void serial_rx_asynch(serial_t obj, void rx, size_t rx_length, uint8_t rx_widt`
`583`	`584`	`}`
`584`	`585`	`}`
`585`	`586`
	`587`	`+ obj->serial.rxstate = kUART_RxBusy;`
	`588`	`+`
`586`	`589`	`/* Start the transfer */`
`587`	`590`	`serial_receive_asynch(obj);`
`588`		`- obj->serial.rxstate = kUART_RxBusy;`
`589`	`591`	`}`
`590`	`592`
`591`	`593`	`uint8_t serial_tx_active(serial_t *obj)`