Start new assembler

1 files changed, 34 insertions, 0 deletions

diff --git a/newasm/main.s b/newasm/main.s
new file mode 100644
index 0000000..7f3c038
--- /dev/null
+++ b/newasm/main.s
@@ -0,0 +1,34 @@
+.syntax unified
+.cpu cortex-m0plus
+.thumb
+
+.type main, %function
+.global main, strbuf
+
+main:     LDR     R6, =0x20002000
+          BL      uart_recv
+loop:     BL      prompt
+          LDR     R0, strbuf
+          BL      getline
+          LDR     R0, strbuf
+          BL      putstr
+          LDR     R0, =crlf
+          BL      putstr
+          B       loop
+          BL      uart_recv
+          LDR     R0, =0x20000001
+          BX      R0
+
+          .align  4
+strbuf:   .word   0x20001F00
+
+prompt:   PUSH    {LR}
+          MOVS    R0, R6
+          BL      send_hex
+          MOVS    R0, ' 
+          BL      uart_send
+          LDR     R0, [R6]
+          BL      send_hex
+          MOVS    R0, ' 
+          BL      uart_send
+          POP     {PC}