Rename MCU

stm32f103t8u6-bootloader/src/startup.S

@@ -0,0 +1,88 @@
+.syntax unified
+.thumb
+.fpu softvfp
+
+.global Reset_Handler
+.type Reset_Handler, %function
+Reset_Handler:
+init_data:
+    ldr r2, =_start_init_data
+    ldr r3, =_start_data
+    ldr r1, =_end_data
+
+init_data_loop:
+    cmp r3, r1
+    bhs zero_bss
+    ldr r0, [r2], #4
+    str r0, [r3], #4
+    b init_data_loop
+
+zero_bss:
+    ldr r3, =_start_bss
+    ldr r1, =_end_bss
+    movs r0, #0
+
+zero_bss_loop:
+    cmp r3, r1
+    bhs init_finished
+    str r0, [r3], #4
+    b zero_bss_loop
+
+init_finished:
+    bl main
+
+infinite_loop:
+    b infinite_loop
+
+.size Reset_Handler, .-Reset_Handler
+
+// Only the core interrupt vectors, since the bootloader code does not use
+// interrupts. Saves a few bytes to omit the interrupt vector table.
+.section .cortex_vectors, "a"
+.word _end_stack
+.word Reset_Handler
+.word NMI_Handler
+.word HardFault_Handler
+.word MemManage_Handler
+.word BusFault_Handler
+.word UsageFault_Handler
+.word 0x00000000
+.word 0x00000000
+.word 0x00000000
+.word 0x00000000
+.word SVC_Handler
+.word DebugMon_Handler
+.word 0x00000000
+.word PendSV_Handler
+.word SysTick_Handler
+
+.type Dummy_Handler, %function
+Dummy_Handler:
+    b Dummy_Handler
+
+.weak  NMI_Handler
+.thumb_set NMI_Handler, Dummy_Handler
+
+.weak  HardFault_Handler
+.thumb_set HardFault_Handler, Dummy_Handler
+
+.weak  MemManage_Handler
+.thumb_set MemManage_Handler, Dummy_Handler
+
+.weak  BusFault_Handler
+.thumb_set BusFault_Handler, Dummy_Handler
+
+.weak  UsageFault_Handler
+.thumb_set UsageFault_Handler, Dummy_Handler
+
+.weak  SVC_Handler
+.thumb_set SVC_Handler, Dummy_Handler
+
+.weak  DebugMon_Handler
+.thumb_set DebugMon_Handler, Dummy_Handler
+
+.weak  PendSV_Handler
+.thumb_set PendSV_Handler, Dummy_Handler
+
+.weak  SysTick_Handler
+.thumb_set SysTick_Handler, Dummy_Handler