rp2040

commit c776c23c85b5bbd867e836a040f2bc68286de744
parent 25f5e220d72d188063d4b49a951b3e5a94047412
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Mon, 20 Mar 2023 18:36:19 +0900

save registers in function
led blinks twice. something wrong

Diffstat:
M
main.s
 | 
32
+++++++++++++++++++-------------

1 file changed, 19 insertions(+), 13 deletions(-)
diff --git a/main.s b/main.s
@@ -45,7 +45,7 @@ xosc_stable:
 
 	// set pll feedback divider
 	ldr r0, pll_sys_base
-	mov r1, #0x14
+	mov r1, #0x4
 	lsl r1, r1, #4 // #320
 	str r1, [r0, #0x8] // PLL_FBDIV_INT
 
@@ -69,7 +69,7 @@ pll_lock:
 	lsl r1, r1, #4
 	add r1, r1, #1
 	lsl r1, r1, #12
-//	str r1, [r0, #0xc] // PLL_PRIM
+	str r1, [r0, #0xc] // PLL_PRIM
 
 	// turn on post dividers
 	ldr r0, pll_sys_base
@@ -83,9 +83,15 @@ pll_lock:
 	mov r1, #1
 	str r1, [r0, #0x3c] // CLOCKS_CLK_SYS_CTRL
 
+	ldr r0, pll_sys_base
+	ldr r1, [r0, #0x4]
+	mov r2, #8
+	and r1, r2
+	beq p0
+
 loop:
-	mov r0, #1
-	bl pr
+	//mov r0, #1
+	//bl pr
 	b loop
 
 // functions
@@ -148,20 +154,20 @@ p1:
 	pop {pc}
 
 led_blink:
-	push {lr}
-	ldr r1, sio_base
-	mov r2, #0
-	str r0, [r1, #0x10] // SIO_GPIO_OUT_SET
+	push {lr, r4}
+	ldr r4, sio_base
+	mov r5, r0
+	str r5, [r4, #0x10] // SIO_GPIO_OUT_SET
 	bl delay
-	str r0, [r1, #0x18] // SIO_GPIO_OUT_CLR
+	str r5, [r4, #0x18] // SIO_GPIO_OUT_CLR
 	bl delay
-	pop {pc}
+	pop {r4, pc}
 
 delay:
-	mov r2, #1
-	lsl r2, r2, #20
+	mov r0, #1
+	lsl r0, r0, #20
 del_loop:
-	sub r2, r2, #1
+	sub r0, r0, #1
 	bne del_loop
 	bx lr