rp2040

commit 0756ba9580dbea415d64cee5d98d3724ac0135a2
parent 13c96d1181684dbb12fd6a76a5c4e921f0df0826
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Fri, 24 Mar 2023 10:14:21 +0900

enable clk_peri

Diffstat:
M
main.s
 | 
21
++++++++++++++++++---

1 file changed, 18 insertions(+), 3 deletions(-)
diff --git a/main.s b/main.s
@@ -92,6 +92,13 @@ pll_lock:
 	// enable clk_peri
 	lsl r1, r1, #11
 	str r1, [r0, #0x48]
+
+	// enable clk_peri
+	ldr r0, clocks_base
+	mov r1, #1
+	lsl r1, r1, #11
+	add r1, r1, #128 // xosc_clksrc
+	str r1, [r0, #0x48] // CLOCKS_CLK_PERI_CTRL
 	
 	// enable uart0
 	ldr r0, uart0_base
@@ -111,8 +118,8 @@ pll_lock:
 	str r1, [r0, #0x2c] // UART0_UARTLCR_H
 
 loop:
-	bl p0
-	bl uart0_read
+	bl p2
+	mov r0, #0x41
 	bl uart0_write
 	b loop
 
@@ -149,7 +156,7 @@ uart0_txff:
 	bl p0
 	ldr r7, [r5, #0x18] // UART0_UARTFR
 	and r7, r7, r6
-	//bne uart0_txff
+	bne uart0_txff
 	str r4, [r5, #0] // UART0_UARTDR
 	pop {r4, r5, r6, r7, pc}
 
@@ -202,6 +209,14 @@ p1:
 	bl led_blink
 	pop {pc}
 
+p2:
+	// blink led on gpio22 and gpio24
+	push {lr}
+	mov r0, #5
+	lsl r0, r0, #22
+	bl led_blink
+	pop {pc}
+
 led_blink:
 	push {r4, r5, lr}
 	ldr r4, sio_base