xc_ppf1901: move heap to sdram

Signed-off-by: surenyi <surenyi82@163.com>

scripts/iap.ld

@@ -6,7 +6,6 @@ MEMORY {
 	eeprom (rx): org = 0x08004000, len = 16K
     ram   (xrw): org = 0x20000000, len = 112K
     ccmram (rw): org = 0x10000000, len = 64K
-    sdram  (rw): org = 0xc0000000, len = 32M
 }
 SECTIONS {
   .isr_vector : {

targets/xc_ppf1901/flash.ld

@@ -84,11 +84,14 @@ SECTIONS {
     *(.ccmram)
     *(.ccmram*)
     _eccmram = .;
+  } >ccmram AT> flash
+  . = ALIGN(4);
+
+  .bigheap : {
     . = ALIGN(4);
     *(.heap)
     *(.heap.*)
-  } >ccmram AT> flash
-  . = ALIGN(4);
+  } > sdram
 
   .bss : {
     _sbss = .;

targets/xc_ppf1901/target.h

@@ -10,7 +10,7 @@
 #define TICKS_PERIOD     (2) /* mill seconds */
 #define CONSOLE_BAUDRATE (115200)
 
-#define TARGET_HEAP_SIZE (8192)
+#define TARGET_HEAP_SIZE (0x200000)
 
 #define TARGET_HAS_SPI1 1
 #define TARGET_HAS_SPI2 1