update dfifo allocation scheme to use top pointer, update document an…

…d explanation for EPInfo address and GDFIFO.

some function rename
update h743 linker to use SRAM1 since USB DMA cannot access DTCM ram
update xmc4500 to use uuid for testing

hw/bsp/stm32h7/linker/stm32h743xx_flash.ld

@@ -32,23 +32,24 @@
 /* Entry Point */
 ENTRY(Reset_Handler)
 
-/* Highest address of the user mode stack */
-_estack = 0x20020000;    /* end of RAM */
-/* Generate a link error if heap and stack don't fit into RAM */
-_Min_Heap_Size = 0x200;      /* required amount of heap  */
-_Min_Stack_Size = 0x400; /* required amount of stack */
-
 /* Specify the memory areas */
 MEMORY
 {
-DTCMRAM (xrw)      : ORIGIN = 0x20000000, LENGTH = 128K
-RAM_D1 (xrw)      : ORIGIN = 0x24000000, LENGTH = 512K
-RAM_D2 (xrw)      : ORIGIN = 0x30000000, LENGTH = 288K
-RAM_D3 (xrw)      : ORIGIN = 0x38000000, LENGTH = 64K
-ITCMRAM (xrw)      : ORIGIN = 0x00000000, LENGTH = 64K
-FLASH (rx)      : ORIGIN = 0x8000000, LENGTH = 2048K
+    DTCMRAM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K
+    RAM_D1 (xrw)  : ORIGIN = 0x24000000, LENGTH = 512K
+    RAM_D2 (xrw)  : ORIGIN = 0x30000000, LENGTH = 288K
+    RAM_D3 (xrw)  : ORIGIN = 0x38000000, LENGTH = 64K
+    ITCMRAM (xrw) : ORIGIN = 0x00000000, LENGTH = 64K
+    FLASH (rx)    : ORIGIN = 0x08000000, LENGTH = 2048K
+
 }
 
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM_D1) + LENGTH(RAM_D1);    /* end of RAM */
+/* Generate a link error if heap and stack don't fit into RAM */
+_Min_Heap_Size = 0x200;      /* required amount of heap  */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
 /* Define output sections */
 SECTIONS
 {
@@ -127,7 +128,7 @@ SECTIONS
 
     . = ALIGN(4);
     _edata = .;        /* define a global symbol at data end */
-  } >DTCMRAM AT> FLASH
+  } >RAM_D1 AT> FLASH
 
 
   /* Uninitialized data section */
@@ -144,7 +145,9 @@ SECTIONS
     . = ALIGN(4);
     _ebss = .;         /* define a global symbol at bss end */
     __bss_end__ = _ebss;
-  } >DTCMRAM
+  } >RAM_D1
+
+
 
   /* User_heap_stack section, used to check that there is enough RAM left */
   ._user_heap_stack :
@@ -155,9 +158,7 @@ SECTIONS
     . = . + _Min_Heap_Size;
     . = . + _Min_Stack_Size;
     . = ALIGN(8);
-  } >DTCMRAM
-
-
+  } >RAM_D1
 
   /* Remove information from the standard libraries */
   /DISCARD/ :

hw/bsp/xmc4000/family.c

@@ -103,6 +103,12 @@ uint32_t board_button_read(void) {
   return BUTTON_STATE_ACTIVE == XMC_GPIO_GetInput(BUTTON_PIN);
 }
 
+size_t board_get_unique_id(uint8_t id[], size_t max_len) {
+  uint8_t const len = tu_min8(16, max_len);
+  memcpy(id, g_chipid, len);
+  return len;
+}
+
 int board_uart_read(uint8_t* buf, int len) {
 #ifdef UART_DEV
   for(int i=0;i<len;i++) {