fix QSPI-API for NRF52

Author: steinerphilipp

targets/TARGET_NORDIC/TARGET_NRF5x/qspi_api.c

@@ -76,7 +76,7 @@ TODO
 // NRF SFDP defines
 #define DWORD_LEN           4
 #define SFDP_CMD_LEN        DWORD_LEN
-#define SFDP_DATA_LEN       128  // SFPD data buffer length in bytes, may need to be increased for other flash parts
+#define SFDP_DATA_LEN       QSPIF_SFDP_DATA_LEN  // SFPD data buffer length in bytes, may need to be increased for other flash parts
 #define SFDP_READ_LEN       8    // 8 SFDP bytes can be read at a time
 #define SFDP_READ_MAX       (SFDP_DATA_LEN / SFDP_READ_LEN)
 
@@ -559,14 +559,9 @@ qspi_status_t sfdp_read(qspi_t *obj, const qspi_command_t *command, void *data,
             return QSPI_STATUS_ERROR;
         }
 
-        // calculate the SFDP data length based on the parameter table offset
-        // provided at index 12, plus the table length in DWORDS at index 11
-        uint32_t sfdp_length = sfdp_rx[12] + (sfdp_rx[11] * DWORD_LEN);
-
         // check if the data request is within the SFDP data array
         // increase SFDP_DATA_LEN to match sfdp_length, if necessary
-        if ( sfdp_length <= SFDP_DATA_LEN &&
-             sfdp_length >= (command->address.value + *length) ) {
+        if ( SFDP_DATA_LEN >= (command->address.value + *length) ) {
             memcpy(data, (sfdp_rx + command->address.value), *length);
             return QSPI_STATUS_OK;
         } else {

targets/targets.json

@@ -5568,6 +5568,11 @@
             "uart_1_fifo_size": {
                 "help": "UART1 FIFO buffer. FIFO buffer is filled from DMA buffer.",
                 "value": 32
+            },
+            "qspif_sfdp_data_len": {
+                "help": "length of Flash SFDP DATA",
+                "value": 128,
+                "macro_name": "QSPIF_SFDP_DATA_LEN"
             }
         },
         "overrides": {