.include "/usr/local/toolchain/unilib/r8c/include/r5f2136cy.inc"

.text
		.global _start
		.type _start, @function

_start:	
		fclr	i			;disable interrupts
		ldc	#_stack, sp

		mov.b	#0x0b, PRCR		;protection mode register
		mov.b	#0x01, FRA0		; enable HS OSC
		nop
		nop
		nop
		nop
		mov.b	#0x03, FRA0		; switch to HS OSC
.ifdef CM4
		mov.b	#0x05, CM4		; select HS OSC
.endif

.ifdef PMCSEL
		mov.b	#PMCSEL_EN, PMCSEL		; select comm pin layout
.endif

		mov.w	#__data_image,a0
		mov.w	#__data_section_start,a1
		mov.w	#__data_section_size,r1
		
_cpy_data:	cmp.w	#0,r1
		jeq	_cpy_data_e
		mov.b	[a0],r0l
		mov.b	r0l,[a1]
		add.w	#1,a0
		add.w	#1,a1
		sub.w	#1,r1
		jmp.b	_cpy_data
		
_cpy_data_e:

		mov.w	#__bss_start,a0
		mov.w	#__bss_size,r0
_clr_bss:	cmp.w	#0,r0
		jeq	_clr_bss_e
		mov.b	#0,[a0]
		add.w	#1,a0
		sub.w	#1,r0
		jmp.b	_clr_bss
		
_clr_bss_e:

;		mov.b	#1,PD3			; set green LED for debug
;		mov.b	#1,PORT3		
		jsr.w	_main			; go to main in main.c
	
_fatal:		jmp.b	_fatal