Added software flow control pins

Author: Jenny Plunkett

targets/TARGET_TI/TARGET_CC32XX/TARGET_CC3220SF/serial_api.c

@@ -304,12 +304,6 @@ int serial_writable(serial_t *obj) {
 
 void serial_clear(serial_t *obj) {
     obj->uart->DR = 0x00;
-    /**
-    obj->uart->FCR = 1 << 0  // FIFO Enable - 0 = Disables, 1 = Enabled
-                   | 1 << 1  // rx FIFO reset
-                   | 1 << 2  // tx FIFO reset
-                   | 0 << 6; // interrupt depth
-                   **/
 }
 
 void serial_pinout_tx(PinName tx) {
@@ -332,25 +326,35 @@ void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, Pi
     switch(type) {
         case FlowControlRTS:
             pinmap_pinout(rxflow, PinMap_UART_RTS);
+            uart_data[obj->index].sw_rts.pin = rxflow;
+            uart_data[obj->index].sw_cts.pin = NC;
             MAP_UARTFlowControlSet(obj->baseAddr, UART_FLOWCONTROL_RX);
             break;
 
         case FlowControlCTS:
             pinmap_pinout(txflow, PinMap_UART_CTS);
+            uart_data[obj->index].sw_rts.pin = NC;
+            uart_data[obj->index].sw_cts.pin = txflow;
             MAP_UARTFlowControlSet(obj->baseAddr, UART_FLOWCONTROL_TX);
             break;
 
         case FlowControlRTSCTS:
             pinmap_pinout(rxflow, PinMap_UART_RTS);
             pinmap_pinout(txflow, PinMap_UART_CTS);
+            uart_data[obj->index].sw_rts.pin = rxflow;
+            uart_data[obj->index].sw_cts.pin = txflow;
             MAP_UARTFlowControlSet(obj->baseAddr, UART_FLOWCONTROL_TX | UART_FLOWCONTROL_RX);
             break;
 
         case FlowControlNone:
+            uart_data[obj->index].sw_rts.pin = NC;
+            uart_data[obj->index].sw_cts.pin = NC;
             MAP_UARTFlowControlSet(obj->baseAddr, UART_FLOWCONTROL_NONE);
             break;
 
         default:
+            uart_data[obj->index].sw_rts.pin = NC;
+            uart_data[obj->index].sw_cts.pin = NC;
             MAP_UARTFlowControlSet(obj->baseAddr, UART_FLOWCONTROL_NONE);
             break;
     }