NRF5x: min read/write implementation

Author: j3hill

components/storage/blockdevice/COMPONENT_QSPIF/QSPIFBlockDevice.cpp

@@ -29,8 +29,6 @@ using namespace mbed;
 
 /* Default QSPIF Parameters */
 /****************************/
-#define QSPIF_DEFAULT_READ_SIZE  1
-#define QSPIF_DEFAULT_PROG_SIZE  1
 #define QSPIF_DEFAULT_PAGE_SIZE  256
 #define QSPIF_DEFAULT_SE_SIZE    4096
 #define QSPI_MAX_STATUS_REGISTER_SIZE 3
@@ -462,14 +460,14 @@ int QSPIFBlockDevice::erase(bd_addr_t addr, bd_size_t in_size)
 
 bd_size_t QSPIFBlockDevice::get_read_size() const
 {
-    // Assuming all devices support 1byte read granularity
-    return QSPIF_DEFAULT_READ_SIZE;
+    // Return minimum read size in bytes for the device
+    return MBED_CONF_QSPIF_QSPI_MIN_READ_SIZE;
 }
 
 bd_size_t QSPIFBlockDevice::get_program_size() const
 {
-    // Assuming all devices support 1byte program granularity
-    return QSPIF_DEFAULT_PROG_SIZE;
+    // Return minimum program/write size in bytes for the device
+    return MBED_CONF_QSPIF_QSPI_MIN_PROG_SIZE;
 }
 
 bd_size_t QSPIFBlockDevice::get_erase_size() const

components/storage/blockdevice/COMPONENT_QSPIF/mbed_lib.json

@@ -8,7 +8,9 @@
         "QSPI_SCK": "QSPI_FLASH1_SCK",
         "QSPI_CSN": "QSPI_FLASH1_CSN",
         "QSPI_POLARITY_MODE": 0,
-        "QSPI_FREQ": "40000000"
+        "QSPI_FREQ": "40000000",
+        "QSPI_MIN_READ_SIZE": "1",
+        "QSPI_MIN_PROG_SIZE": "1"
     },
     "target_overrides": {
         "DISCO_F413ZH": {