rp2040

commit 7a0a7afa8977158ff8fd40f767a2f361a92adeaf
parent c8a0d06511223b16d6f5ed6c0e6bd606aa4c2c29
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Tue, 25 Apr 2023 08:21:13 +0900

use xor for sio

Diffstat:
M
ex1/main.s
 | 
6
++----

1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/ex1/main.s b/ex1/main.s
@@ -17,7 +17,7 @@ reset:
 
 reset_chk:
 	ldr r1, [r3, #0x8] // RESETS: RESET_DONE
-	and r0, r0, r1
+	tst r0, r1
 	beq reset_chk
 
 	// set gpio functions
@@ -36,9 +36,7 @@ reset_chk:
 	ldr r4, sio_base
 	mov r5, r0
 loop:
-	str r5, [r4, #0x10] // SIO_GPIO_OUT_SET
-	bl delay
-	str r5, [r4, #0x18] // SIO_GPIO_OUT_CLR
+	str r5, [r4, #0x1c] // SIO_GPIO_OUT_XOR
 	bl delay
 	b loop