Use defines in header for SD card buffers

main.c

@@ -762,10 +762,6 @@ void send_buffer(uint8_t * buf, int s)
 #ifndef __USE_SD_CARD__
 #error "Need enable SD card support __USE_SD_CARD__ in nanovna.h, for use ENABLE_SD_CARD_CMD"
 #endif
-// Fat file system work area (at the end of spi_buffer)
-static FATFS *fs_volume   = (FATFS *)(((uint8_t*)(&spi_buffer[SPI_BUFFER_SIZE])) - sizeof(FATFS));
-// FatFS file object (at the end of spi_buffer)
-static FIL   *fs_file     = (   FIL*)(((uint8_t*)(&spi_buffer[SPI_BUFFER_SIZE])) - sizeof(FATFS) - sizeof(FIL));
 
 static FRESULT cmd_sd_card_mount(void){
   const FRESULT res = f_mount(fs_volume, "", 1);

nanovna.h

@@ -1322,6 +1322,17 @@ void rtc_set_time(uint32_t dr, uint32_t tr);
 #include "../FatFs/ff.h"
 #include "../FatFs/diskio.h"
 bool SD_Inserted(void);
+// Buffers for SD card use spi_buffer
+#if SPI_BUFFER_SIZE < 2048
+#error "SPI_BUFFER_SIZE for SD card support need size >= 2048"
+#else
+// Fat file system work area (at the end of spi_buffer)
+#define fs_volume    (FATFS *)(((uint8_t*)(&spi_buffer[SPI_BUFFER_SIZE])) - sizeof(FATFS))
+// FatFS file object (at the end of spi_buffer)
+#define fs_file      (   FIL*)(((uint8_t*)(&spi_buffer[SPI_BUFFER_SIZE])) - sizeof(FATFS) - sizeof(FIL))
+// Filename object (at the end of spi_buffer)
+#define fs_filename  (  char*)(((uint8_t*)(&spi_buffer[SPI_BUFFER_SIZE])) - sizeof(FATFS) - sizeof(FIL) - FF_LFN_BUF - 4)
+#endif
 void testLog(void);        // debug log
 #endif
 

ui.c

@@ -71,19 +71,6 @@ volatile uint8_t operation_requested = OP_NONE;
 
 int8_t previous_marker = MARKER_INVALID;
 
-#ifdef __USE_SD_CARD__
-#if SPI_BUFFER_SIZE < 2048
-#error "SPI_BUFFER_SIZE for SD card support need size >= 2048"
-#else
-// Fat file system work area (at the end of spi_buffer)
-static FATFS *fs_volume   = (FATFS *)(((uint8_t*)(&spi_buffer[SPI_BUFFER_SIZE])) - sizeof(FATFS));
-// FatFS file object (at the end of spi_buffer)
-static FIL   *fs_file     = (   FIL*)(((uint8_t*)(&spi_buffer[SPI_BUFFER_SIZE])) - sizeof(FATFS) - sizeof(FIL));
-// Filename object (at the end of spi_buffer)
-static char  *fs_filename = (  char*)(((uint8_t*)(&spi_buffer[SPI_BUFFER_SIZE])) - sizeof(FATFS) - sizeof(FIL) - FF_LFN_BUF - 4);
-#endif
-#endif
-
 enum {
   UI_NORMAL, UI_MENU, UI_KEYPAD
 };