145 lines
2.3 KiB
ArmAsm
145 lines
2.3 KiB
ArmAsm
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; vim: set ft=gas:
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#define CPUOFF (1<<4)
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#define GIE (1<<3)
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#define IE1 0x0000
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#define IFG1 0x0002
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#define WDTCTL 0x0120
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#define USICTL0 0x0078
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#define USICTL1 0x0079
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#define USICKCTL 0x007a
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#define USICNT 0x007b
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#define USISR 0x007c
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#define BCSCTL3 0x0053
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#define BCSCTL2 0x0058
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#define BCSCTL1 0x0057
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#define DCOCTL 0x0056
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#define P2SEL2 0x0042
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#define P2REN 0x002f
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#define P2SEL 0x002e
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#define P2IE 0x002d
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#define P2IES 0x002c
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#define P2IFG 0x002b
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#define P2DIR 0x002a
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#define P2OUT 0x0029
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#define P2IN 0x0028
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#define P1SEL2 0x0041
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#define P1REN 0x0027
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#define P1SEL 0x0026
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#define P1IE 0x0024
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#define P1IES 0x0024
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#define P1IFG 0x0023
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#define P1DIR 0x0022
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#define P1OUT 0x0021
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#define P1IN 0x0020
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.section ".text.startup._start", "ax", %progbits
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.global _start
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_start:
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dint
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mov.b #0, &IE1
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mov.w #__stack, sp
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mov.b #0, &P2IE
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mov.b #0, &P2SEL
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mov.b #0, &P2SEL2
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mov.b #0xff, &P2DIR
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; TODO: configure wdt
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mov.w #((0x5a<<8)|(1<<4)), &WDTCTL
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mov.b #1, &IE1
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eint
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lockup:
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; enter LPM0 for power save stuff
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bis #(GIE|CPUOFF), sr
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jmp lockup
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.section ".text.callback", "ax", %progbits
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wdt_callback:
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bic.b #1, &IFG1
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bis.b #1, &IE1
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xor.b #1, &P2OUT
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ret
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.section ".vectors", "ax", %progbits
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_VECTORS:
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.2byte ISR_unk ; ffe0
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.2byte ISR_unk ; ffe2
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.2byte ISR_port1 ; ffe4
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.2byte ISR_port2 ; ffe6
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.2byte ISR_USI ; ffe8
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.2byte ISR_unk ; ffea ; (ADC10, not on this chip)
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.2byte ISR_unk ; ffec
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.2byte ISR_unk ; ffee
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.2byte ISR_timer0 ; fff0
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.2byte ISR_timer1 ; fff2
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.2byte ISR_wdt ; fff4
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.2byte ISR_cmpA ; fff6
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.2byte ISR_unk ; fff8
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.2byte ISR_unk ; fffa
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.2byte ISR_NMI ; fffc
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.2byte ISR_RST ; fffe
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.section ".text.isr.unk", "ax", %progbits
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ISR_unk:
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reti
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.section ".text.isr.port1", "ax", %progbits
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ISR_port1:
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reti
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.section ".text.isr.port2", "ax", %progbits
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ISR_port2:
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reti
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.section ".text.isr.usi", "ax", %progbits
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ISR_USI:
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reti
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.section ".text.isr.timer0", "ax", %progbits
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ISR_timer0:
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reti
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.section ".text.isr.timer1", "ax", %progbits
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ISR_timer1:
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reti
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.section ".text.isr.wdt", "ax", %progbits
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ISR_wdt:
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call #wdt_callback
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reti
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.section ".text.isr.cmpA", "ax", %progbits
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ISR_cmpA:
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reti
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.section ".text.isr.nmi", "ax", %progbits
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ISR_NMI:
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reti
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.section ".text.isr.rst", "ax", %progbits
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ISR_RST:
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jmp _start
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