Merge pull request ARMmbed#12368 from mprse/NRF_Serial_Fpga_fix

Fix NRF52840_DK UART driver and adapt FPGA test

Author: 0xc0170

TESTS/mbed_hal_fpga_ci_test_shield/uart/main.cpp

@@ -338,7 +338,9 @@ Case cases[] = {
     Case("38400, 8N1, FC off", one_peripheral<UARTNoFCPort, DefaultFormFactor, fpga_uart_test_common_no_fc<38400, 8, ParityNone, 1, false> >),
     Case("115200, 8N1, FC off", one_peripheral<UARTNoFCPort, DefaultFormFactor, fpga_uart_test_common_no_fc<115200, 8, ParityNone, 1, false> >),
     // stop bits
+#if !defined(UART_TWO_STOP_BITS_NOT_SUPPORTED)
     Case("9600, 8N2, FC off", one_peripheral<UARTNoFCPort, DefaultFormFactor, fpga_uart_test_common_no_fc<9600, 8, ParityNone, 2, false> >),
+#endif
 
 #if DEVICE_SERIAL_FC
     // Every set of pins from every peripheral.
@@ -355,11 +357,16 @@ Case cases[] = {
     Case("115200, 8N1, FC on", one_peripheral<UARTPort, DefaultFormFactor, fpga_uart_test_common<115200, 8, ParityNone, 1, false> >),
     // data bits: not tested (some platforms support 8 bits only)
     // parity
+#if !defined(UART_ODD_PARITY_NOT_SUPPORTED)
     Case("9600, 8O1, FC on", one_peripheral<UARTPort, DefaultFormFactor, fpga_uart_test_common<9600, 8, ParityOdd, 1, false> >),
+#endif
     Case("9600, 8E1, FC on", one_peripheral<UARTPort, DefaultFormFactor, fpga_uart_test_common<9600, 8, ParityEven, 1, false> >),
     // stop bits
+#if !defined(UART_TWO_STOP_BITS_NOT_SUPPORTED)
     Case("9600, 8N2, FC on", one_peripheral<UARTPort, DefaultFormFactor, fpga_uart_test_common<9600, 8, ParityNone, 2, false> >),
 #endif
+#endif
+
 };
 
 utest::v1::status_t greentea_test_setup(const size_t number_of_cases)

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/serial_api.c

@@ -105,8 +105,7 @@
 /**
  * Missing event typedefs.
  */
-typedef enum
-{
+typedef enum {
     NRF_UARTE_EVENT_TXDRDY    = offsetof(NRF_UARTE_Type, EVENTS_TXDRDY),
 } nrf_uarte_event_extra_t;
 
@@ -505,8 +504,7 @@ static void nordic_nrf5_uart_event_handler_endrx_asynch(int instance)
 static void nordic_nrf5_uart_event_handler(int instance)
 {
     /* DMA buffer is full or has been swapped out by idle timeout. */
-    if (nrf_uarte_event_check(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_ENDRX))
-    {
+    if (nrf_uarte_event_check(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_ENDRX)) {
         nrf_uarte_event_clear(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_ENDRX);
 
 #if DEVICE_SERIAL_ASYNCH
@@ -528,16 +526,14 @@ static void nordic_nrf5_uart_event_handler(int instance)
      * will setup the wrong DMA buffer and cause data to be lost.
      */
     if (nrf_uarte_event_check(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_RXSTARTED) &&
-            !nrf_uarte_event_check(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_ENDRX))
-    {
+            !nrf_uarte_event_check(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_ENDRX)) {
         nrf_uarte_event_clear(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_RXSTARTED);
 
         nordic_nrf5_uart_event_handler_rxstarted(instance);
     }
 
     /* Tx DMA buffer has been sent. */
-    if (nrf_uarte_event_check(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_ENDTX))
-    {
+    if (nrf_uarte_event_check(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_ENDTX)) {
         nrf_uarte_event_clear(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_ENDTX);
 
         /* Use SWI to de-prioritize callback. */
@@ -691,7 +687,7 @@ static void nordic_nrf5_uart_configure_rx(int instance)
 {
     /* Disable interrupts during confiration. */
     nrf_uarte_int_disable(nordic_nrf5_uart_register[instance], NRF_UARTE_INT_RXSTARTED_MASK |
-                                                               NRF_UARTE_INT_ENDRX_MASK);
+                          NRF_UARTE_INT_ENDRX_MASK);
 
     /* Clear FIFO buffer. */
     nrf_atfifo_clear(nordic_nrf5_uart_state[instance].fifo);
@@ -720,7 +716,7 @@ static void nordic_nrf5_uart_configure_rx(int instance)
 
     /* Enable interrupts again. */
     nrf_uarte_int_enable(nordic_nrf5_uart_register[instance], NRF_UARTE_INT_RXSTARTED_MASK |
-                                                              NRF_UARTE_INT_ENDRX_MASK);
+                         NRF_UARTE_INT_ENDRX_MASK);
 }
 
 #if DEVICE_SERIAL_ASYNCH
@@ -733,7 +729,7 @@ static void nordic_nrf5_uart_configure_rx_asynch(int instance)
 {
     /* Disable Rx related interrupts. */
     nrf_uarte_int_disable(nordic_nrf5_uart_register[instance], NRF_UARTE_INT_RXSTARTED_MASK |
-                                                               NRF_UARTE_INT_ENDRX_MASK);
+                          NRF_UARTE_INT_ENDRX_MASK);
 
     /* Clear Rx related events. */
     nrf_uarte_event_clear(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_RXSTARTED);
@@ -803,7 +799,7 @@ static void nordic_nrf5_serial_configure(serial_t *obj)
         nrf_uarte_task_trigger(nordic_nrf5_uart_register[instance],
                                NRF_UARTE_TASK_STARTRX);
 
-    /* Owner hasn't changed but mode has. Reconfigure. */
+        /* Owner hasn't changed but mode has. Reconfigure. */
     } else if ((uart_object->rx_asynch == true) && (nordic_nrf5_uart_state[instance].rx_asynch == false)) {
 
         nordic_nrf5_uart_configure_rx_asynch(instance);
@@ -942,8 +938,8 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
         bool done = false;
         do {
             done = nrf_uarte_event_check(nordic_nrf5_uart_register[instance],
-                                (nrf_uarte_event_t) NRF_UARTE_EVENT_TXDRDY);
-        } while(done == false);
+                                         (nrf_uarte_event_t) NRF_UARTE_EVENT_TXDRDY);
+        } while (done == false);
     }
 
     /* Store pins in serial object. */
@@ -1008,7 +1004,7 @@ void serial_free(serial_t *obj)
         if (nordic_nrf5_uart_state[instance].usage_counter == 0) {
 
             nrf_uarte_disable(nordic_nrf5_uart_register[instance]);
-            
+
             /* Turn NRF_UARTE0_BASE or NRF_UARTE1_BASE power off and on to reset peripheral. */
             if (instance == 0) {
                 *(volatile uint32_t *)0x40002FFC = 0;
@@ -1022,7 +1018,7 @@ void serial_free(serial_t *obj)
                 *(volatile uint32_t *)0x40028FFC = 1;
             }
 #endif
-            
+
         }
     }
 }
@@ -1273,6 +1269,8 @@ void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
     struct serial_s *uart_object = obj;
 #endif
 
+    int instance = uart_object->instance;
+
     /* Convert Mbed type to Nordic IRQ mask. */
     uint32_t type = (irq == TxIrq) ? NORDIC_TX_IRQ : NORDIC_RX_IRQ;
 
@@ -1282,10 +1280,20 @@ void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
         uart_object->mask |= type;
         nordic_nrf5_serial_configure(obj);
 
+        /*  It is required by Mbed HAL API to generate TxIrq interrupt when TXD register is empty (also after enabling TxIrq interrupt).
+            Driver uses DMA to perform uart transfer and TxIrq is generated after the transfer is finished.
+            Trigger TxIrq interrupt manually on enabling the TxIrq. */
+        if (irq == TxIrq) {
+            if (nrf_uarte_event_check(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_TXDRDY)) {
+                nordic_swi_tx_trigger(instance);
+            }
+        }
     } else {
 
         uart_object->mask &= ~type;
     }
+
+
 }
 
 /** Get character. This is a blocking call, waiting for a character
@@ -1358,7 +1366,7 @@ void serial_putc(serial_t *obj, int character)
     /* Wait until UART is ready to send next character. */
     do {
         done = nrf_uarte_event_check(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_TXDRDY);
-    } while(done == false);
+    } while (done == false);
 
     nrf_uarte_event_clear(nordic_nrf5_uart_register[instance], NRF_UARTE_EVENT_TXDRDY);
 

targets/targets.json

@@ -11484,7 +11484,9 @@
             "WSF_MAX_HANDLERS=10",
             "MBED_MPU_CUSTOM",
             "SWI_DISABLE0",
-            "NRF52_PAN_20"
+            "NRF52_PAN_20",
+            "UART_TWO_STOP_BITS_NOT_SUPPORTED",
+            "UART_ODD_PARITY_NOT_SUPPORTED"
         ],
         "features": [
             "CRYPTOCELL310",