sqlite数据库读写实现

系统堆修改为axi内存区域

linkscripts/STM32H743IITx/link.lds

@@ -6,10 +6,9 @@
 MEMORY
 {
 ROM (rx) : ORIGIN =0x08000000,LENGTH =2048k
-AXIRAM (rw) : ORIGIN =0x24000000,LENGTH =512k
-RAM (rw) : ORIGIN =0x20000000,LENGTH =128k
-SRAM1 (rw) : ORIGIN =0x30000000,LENGTH =128k
-SRAM2 (rw) : ORIGIN =0x30020000,LENGTH =128k
+TDCMRAM (rw) : ORIGIN =0x20000000,LENGTH =128k
+RAM (rw) : ORIGIN =0x24000000,LENGTH =512k
+SRAM (rw) : ORIGIN =0x30000000,LENGTH =288k
 SDRAM (rw) : ORIGIN =0xC0000000,LENGTH =32768k
 }
 ENTRY(Reset_Handler)
@@ -85,6 +84,18 @@ SECTIONS
     } > ROM
     __exidx_end = .;
 
+    .tdcmram(NOLOAD): 
+    {
+        . = ALIGN(4);
+        _stdcmram = .;
+
+        *(.tdcmram)
+        *(.tdcmram.*)
+
+        . = ALIGN(4);
+        _etdcmram = .;
+    } > TDCMRAM
+
     /* .data section which is used for initialized data */
 
     .data : AT (_sidata)
@@ -106,17 +117,7 @@ SECTIONS
         . = ALIGN(4);
         /* This is used by the startup in order to initialize the .data secion */
         _edata = . ;
-    } >RAM
-
-.ram_d1(NOLOAD) : 
-{
-    . = ALIGN(4);
-    _sram_dax = .;
-    *(.ram_d1)
-    *(.ram_d1.*)
-    . = ALIGN(4);
-    _eram_d1 = .;
-} >AXIRAM
+    } > RAM
 
     .stack : 
     {