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-rw-r--r--cpu/at91rm9200/cpu.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/cpu/at91rm9200/cpu.c b/cpu/at91rm9200/cpu.c
index 02507297e1..c006d9c7e6 100644
--- a/cpu/at91rm9200/cpu.c
+++ b/cpu/at91rm9200/cpu.c
@@ -35,6 +35,10 @@
#include <asm/io.h>
#include <asm/arch/hardware.h>
+#if !defined(CONFIG_DBGU) && !defined(CONFIG_USART1)
+#error must define one of CONFIG_DBGU or CONFIG_USART1
+#endif
+
/* read co-processor 15, register #1 (control register) */
static unsigned long read_p15_c1(void)
{
@@ -116,7 +120,12 @@ int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
disable_interrupts();
reset_cpu(0);
#else
+#ifdef CONFIG_DBGU
+ AT91PS_USART us = AT91C_BASE_DBGU;
+#endif
+#ifdef CONFIG_USART1
AT91PS_USART us = AT91C_BASE_US1;
+#endif
AT91PS_PIO pio = AT91C_BASE_PIOA;
/*shutdown the console to avoid strange chars during reset */