add usarts to 303

F303-nolib/inc/Fx/stm32f3.h

@@ -109,7 +109,7 @@ TRUE_INLINE int StartHSE(){ // system bus 72MHz from PLL
 #define WAITWHILE(x)  do{StartUpCounter = 0; while((x) && (++StartUpCounter < 0xffffff)){nop();}; if(x) return 0;}while(0)
     RCC->CR = (RCC->CR & ~RCC_CR_PLLON) | RCC_CR_HSEON; // disable PLL to reconfigure, enable HSE
     WAITWHILE(!(RCC->CR & RCC_CR_HSERDY));
-    // Enable Prefetch Buffer. Flash 2 wait states for 48..72MHz
+    // Enable Prefetch Buffer. Flash 4 wait states for 48..72MHz
     FLASH->ACR = (FLASH->ACR & ~(FLASH_ACR_LATENCY)) |
             FLASH_ACR_LATENCY_2 | FLASH_ACR_PRFTBE;
     // HCLK = SYSCLK (AHB prescaler = 1), PCLK1 = HCLK (APB1 prescaler = 1), PCLK2 = HCLK (APB2 prescaler = 1)

F303-nolib/inc/ld/stm32f3.ld

@@ -49,6 +49,10 @@ SECTIONS {
     _stext = .;
     *(.text*)
     *(.rodata*)
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    KEEP (*(.init))
+    KEEP (*(.fini))
     . = ALIGN(4);
     _etext = .;
   } >rom
@@ -61,7 +65,7 @@ SECTIONS {
   .ARM : {
     *(.ARM.exidx*)
   } >rom
-  
+
   .data :
   {
     . = ALIGN(4);
@@ -74,11 +78,22 @@ SECTIONS {
   .myvars :
   {
     . = ALIGN(2048);
+    __varsstart = ABSOLUTE(.);
     KEEP(*(.myvars))
   } > rom
 
   _ldata = LOADADDR(.data);
 
+  .ccmram :
+  {
+    . = ALIGN(4);
+    _sccmram = .;
+    *(.ccmram)
+    *(.ccmram*)
+    . = ALIGN(4);
+    _eccmram = .;
+  } >ccmram AT> rom
+
   .bss :
   {
     . = ALIGN(4);