From ef5584d60def8e9f778f9332cb43a22591b6ff24 Mon Sep 17 00:00:00 2001
From: Jacques Comeaux <jacquesrcomeaux@protonmail.com>
Date: Tue, 18 Jun 2024 20:42:13 -0500
Subject: Add demo program for memory editors

---
 misc/demo.s | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 misc/demo.s

(limited to 'misc')

diff --git a/misc/demo.s b/misc/demo.s
new file mode 100644
index 0000000..1191b24
--- /dev/null
+++ b/misc/demo.s
@@ -0,0 +1,20 @@
+.syntax unified
+.cpu cortex-m0plus
+.thumb
+
+.align 4
+
+ECHO:   LDR     R1, [PC, #20]   // 00 044405 0x00 0x4905 UART0_BASE
+        MOVS    R3, 0x10        // 02 021420 0x02 0x2310 RX FIFO EMPTY
+1:      LDR     R2, [R1, 0x18]  // 04 064612 0x04 0x698A UARTFR_OFST
+        TST     R2, R3          // 06 041032 0x06 0x421A
+        BNE     1b              // 10 150774 0x08 0xD1FC
+        LDRB    R0, [R1]        // 12 074010 0x0A 0x7808 UARTDR_OFST
+        MOVS    R3, 0x20        // 14 021440 0x0C 0x2320 TX FIFO FULL
+1:      LDR     R2, [R1, 0x18]  // 16 064612 0x0E 0x698A UARTFR_OFST
+        TST     R2, R3          // 20 041032 0x10 0x421A
+        BNE     1b              // 22 150774 0x12 0xD1FC
+        STRB    R0, [R1]        // 24 070010 0x14 0x7008 UARTDR_OFST
+        B       ECHO            // 26 163763 0x16 0xE7F3
+        .WORD   0x40034000      // 30 040000 0x18 0x4000
+                                // 32 040003 0x1A 0x4003
-- 
cgit v1.2.3