rp2040

commit 9de2a0a6db76aa2ddcd58091928a549007d9148f
parent 9cdcea9b9982dc7affe5b89d02fb6b158581b7f5
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Sat,  2 Mar 2024 07:44:56 +0900

work. but still can't access char * variable from c

Diffstat:
M
ex3/Makefile
 | 
2
+-
M
ex3/main.c
 | 
4
+---
M
ex3/memmap.ld
 | 
4
++--
M
ex3/start.s
 | 
2
+-

4 files changed, 5 insertions(+), 7 deletions(-)
diff --git a/ex3/Makefile b/ex3/Makefile
@@ -1,6 +1,6 @@
+CC = arm-none-eabi-gcc
 AS = arm-none-eabi-as
 LD = arm-none-eabi-ld
-CC = arm-none-eabi-gcc
 OBJCOPY = arm-none-eabi-objcopy
 BINCRC = ../tools/bincrc
 BIN2UF2 = ../tools/bin2uf2
diff --git a/ex3/main.c b/ex3/main.c
@@ -14,10 +14,8 @@ isr_svcall(void) {
 	puts("svcall");
 }
 
-char *msg = "hello";
-
 void
 isr_alarm(void) {
-	puts(msg);
+	printh(0xdeadbeef);
 	set_alarm(1000 * 1000);
 }
diff --git a/ex3/memmap.ld b/ex3/memmap.ld
@@ -13,12 +13,12 @@ SECTIONS
 	.vectors : {
 		*(.vectors)
 		. += SIZEOF(.vectors);
-		. = ALIGN(256);
+		. = ALIGN(2);
 		text_start = .;
 	} > FLASH
 	.text : {
 		*(.text)
-	} > FLASH
+	} > SRAM AT > FLASH
 	text_size = SIZEOF(.text);
 }
 
diff --git a/ex3/start.s b/ex3/start.s
@@ -306,7 +306,7 @@ bled:
 	str r5, [r4, #0x18] // SIO: GPIO_OUT_XOR
 	bl delay
 	pop {r0, r1, r2, r3, r4, r5, pc}
-	
+
 delay:
 	push {r0}
 	mov r0, #1