rp2040

commit d519ef5fab85e6532e94055f513fb7a8247517eb
parent 89bbd49c16d6f6cff682163057f7abb1338193ed
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Mon, 18 Mar 2024 12:03:10 +0900

hard fault

Diffstat:
M
ex3/main.c
 | 
6
+++---
M
ex3/proc.s
 | 
23
+++++------------------

2 files changed, 8 insertions(+), 21 deletions(-)
diff --git a/ex3/main.c b/ex3/main.c
@@ -53,7 +53,7 @@ main(void) {
 
 	p0.id = 0;
 	p0.r[13] = 0x20000100; // sp
-	p0.r[14] = (unsigned int) 0xdeadbeef; // lr
+	p0.r[14] = (unsigned int) main; // lr
 	p0.r[15] = 0x20000001; // pc
 	p0.next = &p1;
 
@@ -63,9 +63,9 @@ main(void) {
 	p1.r[15] = 0x20000101; // pc
 	p1.next = NULL;
 
-	restore_context(ptab.head->r);
-
+	//proc0();
 	for (;;) {
+		puts("a");
 		wfi();
 		for (int i = 0; i < 17; i++) {
 			printh(ptab.head->r[i]);
diff --git a/ex3/proc.s b/ex3/proc.s
@@ -1,24 +1,9 @@
+	.align 1
 	.section .proc0, "a"
 	.global proc0
 proc0:
-//	ldr r0, msg0
-//	bl puts
-
-	mov r0, sp
-	bl printh
-	mov r0, #'\n'
-	bl putbyte
-	mov r0, pc
-	bl printh
-	mov r0, #'\n'
-	bl putbyte
-	mrs r0, xpsr
-	bl printh
-	mov r0, #'\n'
-	bl putbyte
-	bl putbyte
-
-	wfi
+	ldr r0, msg0
+	bl puts
 	b proc0
 
 	.align 2
@@ -38,6 +23,7 @@ proc1:
 msg1:
 	.asciz "proc1"
 
+	.align 1
 	.global print_sp
 print_sp:
 	mov r4, lr
@@ -134,6 +120,7 @@ isr_alarm:
 alarm_msg:
 	.asciz "alarm"
 
+	.align 1
 	// void restore_context(unsigned int r[17]);
 	// This function does not return, and needs not to save any registers.
 	// How to restore all of the registers?