rp2040

commit 1694d98d764b5456e9596cc5fe14000e0084430d
parent 6c1fbebf8121ec7d089342e3526c907b63b042e6
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Wed, 12 Apr 2023 06:53:12 +0900

read from flash via ssi

Diffstat:
M
mach.s
 | 
19
++++++++++---------
M
main.c
 | 
2
+-

2 files changed, 11 insertions(+), 10 deletions(-)
diff --git a/mach.s b/mach.s
@@ -169,7 +169,7 @@ flash_read:
 	// disable ssi
 	mov r1, #0
 	str r1, [r3, #0x8] // SSI: SSIENR
-	ldr r1, =((2 << 21) | (7 << 16) | (3 << 8))
+	ldr r1, =((0 << 21) | (31 << 16) | (3 << 8))
 	str r1, [r3, #0] // SSI: CTRLR0
 	mov r1, #0
 	str r1, [r3, #4] // SSI: CTRLR1
@@ -181,22 +181,23 @@ flash_read:
 	// reenable SSI
 	mov r1, #1
 	str r1, [r3, #0x8] // SSI: SSIENR
-
-	mov r1, #0x06
-	//ldr r2, =0x00000100
-	str r1, [r3, #0x60] // SSI: DR0
+	// exit xip mode
+	mov r1, #0x00
 	str r1, [r3, #0x60] // SSI: DR0
 	bl wait_ssi
 	bl ssi_pop
 
-	mov r1, #0x35
-	str r1, [r3, #0x60] // SSI: DR0
+	bl led_p0
+
+	mov r1, #0x03
+	lsl r1, r1, #24
+	mov r2, #1
+	lsl r2, r2, #8
+	add r1, r1, r2
 	str r1, [r3, #0x60] // SSI: DR0
 	bl wait_ssi
 	bl ssi_pop
 
-	pop {pc}
-
 wait_ssi:
 	ldr r1, [r3, #0x28] // SSI: SR
 	mov r2, #4 // TFE
diff --git a/main.c b/main.c
@@ -6,6 +6,6 @@ main(void)
 {
 	init();
 	while(1) {
-		led_p2();
+		;
 	}
 }