rp2040

commit 27af25bb882a8c50c2c7e0290eb6c77a166f9886
parent 622086fcc5ceed2c72aab98a7af66d6a103f9ad3
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Sat, 16 Mar 2024 08:11:56 +0900

read special registers

Diffstat:
M
ex3/main.c
 | 
6
+++++-
M
ex3/proc.s
 | 
7
+++++++

2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/ex3/main.c b/ex3/main.c
@@ -8,6 +8,7 @@ void *get_sp(void);
 void wfi(void);
 void *memcpy(void *s1, void *s2, long n);
 void setreg(void);
+void print_sr(void);
 
 extern char proc0_start, proc0_size;
 extern char proc1_start, proc1_size;
@@ -51,6 +52,7 @@ main(void) {
 	p1.r[15] = (void *) 0x20000100; // pc
 
 	for (;;) {
+		print_sr(); puts("");
 		setreg();
 		wfi();
 	}
@@ -84,9 +86,11 @@ isr_svcall(void) {
 void
 isr_alarm(void) {
 	int *sp = get_sp();
+	print_sr();
+	puts("");
 	for (int i = 0; i < 12; i += 1) {
 		printh(sp+i);
-		printh(*(sp+i));
+		printh((void *)*(sp+i));
 		puts("");
 	}
 	scheduler();
diff --git a/ex3/proc.s b/ex3/proc.s
@@ -44,3 +44,10 @@ setreg:
 	mov r3, #3
 	nop
 	pop {pc}
+
+	.global print_sr
+print_sr:
+	push {lr}
+	mrs r0, ipsr
+	bl printh
+	pop {pc}