From a074364c3731d66b56d988c8a6c960a83ea0e0a1 Mon Sep 17 00:00:00 2001
From: tmk <hasu@tmk-kbd.com>
Date: Fri, 10 Apr 2015 01:32:04 +0900
Subject: Squashed 'tmk_core/' content from commit 05caacc

git-subtree-dir: tmk_core
git-subtree-split: 05caaccec92694bb24c8c3c3a9940b96efd4605c
---
 protocol/ps2_io_avr.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 protocol/ps2_io_avr.c

(limited to 'protocol/ps2_io_avr.c')

diff --git a/protocol/ps2_io_avr.c b/protocol/ps2_io_avr.c
new file mode 100644
index 0000000000..ed462345ba
--- /dev/null
+++ b/protocol/ps2_io_avr.c
@@ -0,0 +1,75 @@
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+
+/* Check port settings for clock and data line */
+#if !(defined(PS2_CLOCK_PORT) && \
+      defined(PS2_CLOCK_PIN) && \
+      defined(PS2_CLOCK_DDR) && \
+      defined(PS2_CLOCK_BIT))
+#   error "PS/2 clock port setting is required in config.h"
+#endif
+
+#if !(defined(PS2_DATA_PORT) && \
+      defined(PS2_DATA_PIN) && \
+      defined(PS2_DATA_DDR) && \
+      defined(PS2_DATA_BIT))
+#   error "PS/2 data port setting is required in config.h"
+#endif
+
+
+/*
+ * Clock
+ */
+void clock_init(void)
+{
+}
+
+void clock_lo(void)
+{
+    PS2_CLOCK_PORT &= ~(1<<PS2_CLOCK_BIT);
+    PS2_CLOCK_DDR  |=  (1<<PS2_CLOCK_BIT);
+}
+
+void clock_hi(void)
+{
+    /* input with pull up */
+    PS2_CLOCK_DDR  &= ~(1<<PS2_CLOCK_BIT);
+    PS2_CLOCK_PORT |=  (1<<PS2_CLOCK_BIT);
+}
+
+bool clock_in(void)
+{
+    PS2_CLOCK_DDR  &= ~(1<<PS2_CLOCK_BIT);
+    PS2_CLOCK_PORT |=  (1<<PS2_CLOCK_BIT);
+    _delay_us(1);
+    return PS2_CLOCK_PIN&(1<<PS2_CLOCK_BIT);
+}
+
+/*
+ * Data
+ */
+void data_init(void)
+{
+}
+
+void data_lo(void)
+{
+    PS2_DATA_PORT &= ~(1<<PS2_DATA_BIT);
+    PS2_DATA_DDR  |=  (1<<PS2_DATA_BIT);
+}
+
+void data_hi(void)
+{
+    /* input with pull up */
+    PS2_DATA_DDR  &= ~(1<<PS2_DATA_BIT);
+    PS2_DATA_PORT |=  (1<<PS2_DATA_BIT);
+}
+
+bool data_in(void)
+{
+    PS2_DATA_DDR  &= ~(1<<PS2_DATA_BIT);
+    PS2_DATA_PORT |=  (1<<PS2_DATA_BIT);
+    _delay_us(1);
+    return PS2_DATA_PIN&(1<<PS2_DATA_BIT);
+}
-- 
cgit v1.2.3