Complete KISSCC and fix simplex TX case

src/main/drivers/serial_softserial.c

@@ -260,7 +260,16 @@ serialPort_t *openSoftSerial(softSerialPortIndex_e portIndex, serialReceiveCallb
                 return NULL;
 
             softSerial->txIO = txIO;
-            softSerial->exTimerHardware = timerTx;
+
+            if (!(mode & MODE_RX)) {
+                // TX Simplex, must have a timer
+                if (!timerTx)
+                    return NULL;
+                softSerial->timerHardware = timerTx;
+            } else {
+                // Duplex
+                softSerial->exTimerHardware = timerTx;
+            }
             IOInit(txIO, OWNER_SERIAL_TX, RESOURCE_INDEX(portIndex) + RESOURCE_SOFT_OFFSET);
         }
     }
@@ -449,7 +458,6 @@ void processRxState(softSerial_t *softSerial)
 void onSerialTimerOverflow(timerOvrHandlerRec_t *cbRec, captureCompare_t capture)
 {
     UNUSED(capture);
-
     softSerial_t *self = container_of(cbRec, softSerial_t, overCb);
 
     if (self->port.mode & MODE_TX)

src/main/target/KISSFC/target.h

@@ -64,7 +64,6 @@
 #define USE_UART1
 #define USE_UART2
 #define USE_UART3
-#define SERIAL_PORT_COUNT       4
 
 #define UART1_TX_PIN            PA9
 #define UART1_RX_PIN            PA10
@@ -75,13 +74,13 @@
 #define UART3_TX_PIN            PB10 // PB10 (AF7)
 #define UART3_RX_PIN            PB11 // PB11 (AF7)
 
-// XXX 11 is out of bound
-/*
 #ifdef KISSCC
-#define SOFTSERIAL_1_TIMER_RX_HARDWARE 11
-#define SOFTSERIAL_1_TIMER_TX_HARDWARE 11
+#define USE_SOFTSERIAL1
+#define SOFTSERIAL1_TX_PIN      PA13
+#define SERIAL_PORT_COUNT       5
+#else
+#define SERIAL_PORT_COUNT       4
 #endif
-*/
 
 #define USE_I2C
 #define I2C_DEVICE              (I2CDEV_1) // PB6/SCL, PB7/SDA