rp2040

commit 88a4d0b9ff7e004c7e4cf45b60c5f051bed29eab
parent cbccaeed3ea148f27be286115e930bdb67a9df45
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Fri, 23 Feb 2024 09:28:53 +0900

count 1 sec

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

1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/ex3/main.s b/ex3/main.s
@@ -90,7 +90,11 @@ wait_vco:
 
 	// set systick timer
 	ldr r3, ppb_base
-	ldr r0, =0xffffff
+	// clear count
+	ldr r1, =0xe018
+	str r0, [r3, r1] // M0PLUS: SYST_CVR
+	// set reset value
+	ldr r0, =0xf423f // 1 sec
 	ldr r1, =0xe014
 	str r0, [r3, r1] // M0PLUS: SYST_RVR
 	// enable systick timer