From: bsekisser <squirmyworms@embarqmail.com>
Date: Sun, 26 Apr 2015 12:34:36 +0000 (-0400)
Subject: adc: check r_adcsrb is valid before init
X-Git-Tag: v1.3~48^2
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=f65ac1a207cc940757cd33dc05346adb7a9c60b9;p=sx%2Fsimavr.git

adc: check r_adcsrb is valid before init

fix issue #118

	modified:   simavr/sim/avr_adc.c
---

diff --git a/simavr/sim/avr_adc.c b/simavr/sim/avr_adc.c
index 712bfb7..b1c5f55 100644
--- a/simavr/sim/avr_adc.c
+++ b/simavr/sim/avr_adc.c
@@ -326,7 +326,8 @@ void avr_adc_init(avr_t * avr, avr_adc_t * p)
 	avr_io_setirqs(&p->io, AVR_IOCTL_ADC_GETIRQ, ADC_IRQ_COUNT, NULL);
 
 	avr_register_io_write(avr, p->r_adcsra, avr_adc_write_adcsra, p);
-	avr_register_io_write(avr, p->r_adcsrb, avr_adc_write_adcsrb, p);
+	if (p->r_adcsrb)
+		avr_register_io_write(avr, p->r_adcsrb, avr_adc_write_adcsrb, p);
 	avr_register_io_read(avr, p->r_adcl, avr_adc_read_l, p);
 	avr_register_io_read(avr, p->r_adch, avr_adc_read_h, p);
 }