3 files changed, 68 insertions, 0 deletions

diff --git a/assembler/octal.s b/assembler/octal.s
new file mode 100644
index 0000000..7382ca4
--- /dev/null
+++ b/assembler/octal.s
@@ -0,0 +1,25 @@
+octal:
+  PUSH {LR}
+10:
+  BL get_char
+  MOVS R1, '0
+  CMP R0, R1
+  BNE 10b
+  BL uart_send
+  MOVS R4, 0
+20:
+  BL get_char
+  BEQ 30f
+  MOVS R1, '0
+  CMP R0, R1
+  BLO 20b
+  MOVS R1, '7
+  CMP R0, R1
+  BHI 20b
+  BL uart_send
+  SUBS R0, '0
+  LSLS R4, 3
+  ADDS R4, R0
+  B 20b
+30:
+  POP {PC}
diff --git a/assembler/register.s b/assembler/register.s
new file mode 100644
index 0000000..9fbc76c
--- /dev/null
+++ b/assembler/register.s
@@ -0,0 +1,39 @@
+register:
+  PUSH {LR}
+10:
+  BL get_char
+  MOVS R1, 'R
+  CMPS R0, R1
+  BNE 10b
+20:
+  BL get_char
+  MOVS R1, '0
+  CMPS R0, R1
+  BLO 20b
+  MOVS R1, '9
+  CMPS R0, R1
+  BHI 20b
+  MOVS R1, '1
+  CMPS R0, R1
+  BNE 30f
+50:
+  BL get_char
+  BEQ 60f
+  MOVS R1, '0
+  CMPS R0, R1
+  BLO 50b
+  MOVS R1, '5
+  CMPS R0, R1
+  BHI 50b
+  ADDS R0, 10
+30:
+  SUBS R0, '0
+  MOVS R4, 0
+  ORRS R4, R0
+40:
+  BL get_char
+  BNE 40b
+  POP {PC}
+60:
+  MOVS R4, 1
+  POP {PC}
diff --git a/hexedit/Makefile b/hexedit/Makefile
index 95f49ae..23941da 100644
--- a/hexedit/Makefile
+++ b/hexedit/Makefile
@@ -15,3 +15,7 @@ $(objects): %.o: %.s
 
 clean:
 	rm echo.elf echo.uf2 *.o
+
+flash: echo.uf2
+	[ -h /dev/disk/by-label/RPI-RP2 ] || sleep 2s
+	cat echo.uf2 > /dev/disk/by-label/RPI-RP2