From 3b2f2ea6c6fbfcb23ea9ab324c83d602d45a8820 Mon Sep 17 00:00:00 2001
From: Nao Pross <naopross@thearcway.org>
Date: Thu, 9 Nov 2017 13:17:35 +0100
Subject: Update makefile, and bug fix in pio driver and usart

---
 sw/z80/arch/sleep.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 sw/z80/arch/sleep.c

(limited to 'sw/z80/arch/sleep.c')

diff --git a/sw/z80/arch/sleep.c b/sw/z80/arch/sleep.c
new file mode 100644
index 0000000..154e7ec
--- /dev/null
+++ b/sw/z80/arch/sleep.c
@@ -0,0 +1,16 @@
+#include "sleep.h"
+
+void usleep(uint16_t microseconds)
+{
+    __asm
+    pop hl
+loop:
+    ld bc, #SLEEP_UNIT
+unit:
+    nop
+    dec bc
+    jr nz, unit
+    dec hl
+    jr nz,loop
+    __endasm;
+}
\ No newline at end of file
-- 
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