rp2040

commit b531ac7c4ac8d9a9df07600520ef130a3284ace4
parent 11f4585e9d308df56d2b5cda71f2aaeb8d8bf0e8
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Thu, 28 Aug 2025 09:44:56 +0900

use c

Diffstat:
M
ex4_shell/Makefile
 | 
6
+++++-
M
ex4_shell/main.c
 | 
6
+++---
M
ex4_shell/start.s
 | 
2
+-

3 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/ex4_shell/Makefile b/ex4_shell/Makefile
@@ -2,12 +2,13 @@ CC = arm-none-eabi-gcc
 AS = arm-none-eabi-as
 LD = arm-none-eabi-ld
 OBJCOPY = arm-none-eabi-objcopy
+OBJDUMP = arm-none-eabi-objdump -Mforce-thumb
 BINCRC = ../tools/bincrc
 BIN2UF2 = ../tools/bin2uf2
 
 MCPU = -mcpu=cortex-m0plus
 ASFLAGS = $(MCPU)
-CFLAGS = $(MCPU) -ffreestanding -nostartfiles -O0 -fpic -mthumb -c
+CFLAGS = $(MCPU) -ffreestanding -nostartfiles -O0 -fpic -mthumb -c -Wall -Wextra
 LDFLAGS = --no-relax -nostdlib
 
 OBJS = boot2.o start.o main.o
@@ -41,3 +42,6 @@ flash: all
 
 tools:
 	cd ../tools && make
+
+dump: a.elf
+	$(OBJDUMP) -D a.elf
diff --git a/ex4_shell/main.c b/ex4_shell/main.c
@@ -1,10 +1,10 @@
-enum reset_num {
+typedef enum reset_bit {
 	RESET_IOBANK0 = 1 << 5,
 	RESET_PLL_SYS = 1 << 12,
 	RESET_UART0 =   1 << 22,
-};
+} reset_bit;
 
-void unreset(enum reset_num);
+void unreset(reset_bit);
 void mains(void);
 
 void
diff --git a/ex4_shell/start.s b/ex4_shell/start.s
@@ -58,7 +58,7 @@ loop:
 	wfe
 	b loop
 
-	// void unreset(enum reset_num subsystems);
+	// void unreset(reset_bit subsystems);
 	// unreset unresets subsystems.
 	// subsystems is bitwise or.
 	.global unreset