QSPI HAL: add disabled flag to format phase

If phase is being skipped, set disabled to true, otherwise false.

drivers/QSPI.cpp

@@ -36,7 +36,7 @@ QSPI::QSPI(PinName io0, PinName io1, PinName io2, PinName io3, PinName sclk, Pin
     _address_width = QSPI_CFG_BUS_SINGLE;
     _address_size = QSPI_CFG_ADDR_SIZE_24;
     _alt_width = QSPI_CFG_BUS_SINGLE;
-    _alt_size = QSPI_CFG_ALT_SIZE_NONE;
+    _alt_size = QSPI_CFG_ALT_SIZE_8;
     _data_width = QSPI_CFG_BUS_SINGLE;
     _num_dummy_cycles = 0;
     _mode = 0;
@@ -253,8 +253,9 @@ void QSPI::_build_qspi_command(int instruction, int address, int alt)
     _qspi_command.instruction.bus_width = _inst_width;
     if (instruction != -1) {
         _qspi_command.instruction.value = instruction;
+        _qspi_command.instruction.disabled = false;
     } else {
-        _qspi_command.instruction.value = 0;
+        _qspi_command.instruction.disabled = true;
     }
 
     //Set up address phase parameters
@@ -262,8 +263,9 @@ void QSPI::_build_qspi_command(int instruction, int address, int alt)
     _qspi_command.address.size = _address_size;
     if (address != -1) {
         _qspi_command.address.value = address;
+        _qspi_command.address.disabled = false;
     } else {
-        _qspi_command.address.size = QSPI_CFG_ADDR_SIZE_NONE;
+        _qspi_command.address.disabled = true;
     }
 
     //Set up alt phase parameters
@@ -271,9 +273,9 @@ void QSPI::_build_qspi_command(int instruction, int address, int alt)
     _qspi_command.alt.size = _alt_size;
     if (alt != -1) {
         _qspi_command.alt.value = alt; 
+        _qspi_command.alt.disabled = false;
     } else {
-        //In the case alt phase is absent, set the alt size to be NONE
-        _qspi_command.alt.size = QSPI_CFG_ALT_SIZE_NONE;
+        _qspi_command.alt.disabled = true;
     }
     
     _qspi_command.dummy_count = _num_dummy_cycles;

drivers/QSPI.h

@@ -83,9 +83,9 @@ public:
      *
      *  @param inst_width Bus width used by instruction phase(Valid values are 1,2,4)
      *  @param address_width Bus width used by address phase(Valid values are 1,2,4)
-     *  @param address_size Size in bits used by address phase(Valid values are NONE,8,16,24,32)
+     *  @param address_size Size in bits used by address phase(Valid values are 8,16,24,32)
      *  @param alt_width Bus width used by alt phase(Valid values are 1,2,4)
-     *  @param alt_size Size in bits used by alt phase(Valid values are NONE,8,16,24,32)
+     *  @param alt_size Size in bits used by alt phase(Valid values are 8,16,24,32)
      *  @param data_width Bus width used by data phase(Valid values are 1,2,4)
      *  @param dummy_cycles Number of dummy clock cycles to be used after alt phase
      *  @param mode Mode specifies the SPI mode(Mode=0 uses CPOL=0, CPHA=0, Mode=1 uses CPOL=1, CPHA=1)

hal/qspi_api.h

@@ -20,6 +20,7 @@
 #define MBED_QSPI_API_H
 
 #include "device.h"
+#include <stdbool.h>
 
 #if DEVICE_QSPI
 
@@ -49,7 +50,6 @@ typedef enum qspi_bus_width {
 /** Address size
  */
 typedef enum qspi_address_size {
-    QSPI_CFG_ADDR_SIZE_NONE,
     QSPI_CFG_ADDR_SIZE_8,
     QSPI_CFG_ADDR_SIZE_16,
     QSPI_CFG_ADDR_SIZE_24,
@@ -59,7 +59,6 @@ typedef enum qspi_address_size {
 /** Alternative size
  */
 typedef enum qspi_alt_size {
-    QSPI_CFG_ALT_SIZE_NONE,
     QSPI_CFG_ALT_SIZE_8,
     QSPI_CFG_ALT_SIZE_16,
     QSPI_CFG_ALT_SIZE_24,
@@ -74,16 +73,19 @@ typedef struct qspi_command {
     struct {
         qspi_bus_width_t bus_width; /**< Bus width for the instruction >*/
         uint8_t value;  /**< Instruction value >*/
+        bool disabled; /**< Instruction phase skipped if disabled is set to true >*/
     } instruction;
     struct {
         qspi_bus_width_t bus_width; /**< Bus width for the address >*/
         qspi_address_size_t size; /**< Address size >*/
         uint32_t value; /**< Address value >*/
+        bool disabled; /**< Address phase skipped if disabled is set to true >*/
     }  address;
     struct {
         qspi_bus_width_t bus_width; /**< Bus width for alternative  >*/
         qspi_alt_size_t size; /**< Alternative size >*/
         uint32_t value; /**< Alternative value >*/
+        bool disabled; /**< Alternative phase skipped if disabled is set to true >*/
     } alt;
     uint8_t dummy_count; /**< Dummy cycles count >*/
     struct {