Diff: targets/hal/TARGET_NXP/TARGET_LPC176X/serial_api.c

Revision:

108:4cb9db2ced35

Parent:

64:7b352733b00a

Child:

109:bc5f94f2a67f

--- a/targets/hal/TARGET_NXP/TARGET_LPC176X/serial_api.c	Thu Feb 27 09:45:07 2014 +0000
+++ b/targets/hal/TARGET_NXP/TARGET_LPC176X/serial_api.c	Mon Mar 03 11:15:08 2014 +0000
@@ -364,12 +364,10 @@
 }
 
 int serial_writable(serial_t *obj) {
-    int isWritable = 1;
     if (NC != uart_data[obj->index].sw_cts.pin)
-        isWritable = gpio_read(&uart_data[obj->index].sw_cts) == 0;
-    if (isWritable)
-        isWritable = obj->uart->LSR & 0x40;
-    return isWritable;
+        return (gpio_read(&uart_data[obj->index].sw_cts) == 0) && (obj->uart->LSR & 0x40);  //If flow control: writable if CTS low + UART done
+    else
+        return obj->uart->LSR & 0x20;                                                       //No flow control: writable if space in holding register
 }
 
 void serial_clear(serial_t *obj) {