From 4c8e0fd0bd1712421f957ec5e0ca16fc6bbb3856 Mon Sep 17 00:00:00 2001
From: tmk <nobody@nowhere>
Date: Thu, 19 Jun 2014 16:13:35 +0900
Subject: Port ps2_usb to mbed

---
 protocol/ps2.h          | 65 +++++--------------------------------------
 protocol/ps2_busywait.c | 16 +++++++----
 protocol/ps2_io.h       | 15 ++++++++++
 protocol/ps2_io_avr.c   | 74 +++++++++++++++++++++++++++++++++++++++++++++++++
 protocol/ps2_io_mbed.c  | 60 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 166 insertions(+), 64 deletions(-)
 create mode 100644 protocol/ps2_io.h
 create mode 100644 protocol/ps2_io_avr.c
 create mode 100644 protocol/ps2_io_mbed.c

(limited to 'protocol')

diff --git a/protocol/ps2.h b/protocol/ps2.h
index 483eea720..acde679cf 100644
--- a/protocol/ps2.h
+++ b/protocol/ps2.h
@@ -39,8 +39,9 @@ POSSIBILITY OF SUCH DAMAGE.
 #define PS2_H
 
 #include <stdbool.h>
-#include <util/delay.h>
-#include <avr/io.h>
+#include "wait.h"
+#include "ps2_io.h"
+#include "print.h"
 
 /*
  * Primitive PS/2 Library for AVR
@@ -92,79 +93,27 @@ uint8_t ps2_host_recv(void);
 void ps2_host_set_led(uint8_t usb_led);
 
 
-/* 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
-
 /*--------------------------------------------------------------------
  * static functions
  *------------------------------------------------------------------*/
-static inline void clock_lo(void)
-{
-    PS2_CLOCK_PORT &= ~(1<<PS2_CLOCK_BIT);
-    PS2_CLOCK_DDR  |=  (1<<PS2_CLOCK_BIT);
-}
-static inline void clock_hi(void)
-{
-    /* input with pull up */
-    PS2_CLOCK_DDR  &= ~(1<<PS2_CLOCK_BIT);
-    PS2_CLOCK_PORT |=  (1<<PS2_CLOCK_BIT);
-}
-static inline 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);
-}
-static inline void data_lo(void)
-{
-    PS2_DATA_PORT &= ~(1<<PS2_DATA_BIT);
-    PS2_DATA_DDR  |=  (1<<PS2_DATA_BIT);
-}
-static inline void data_hi(void)
-{
-    /* input with pull up */
-    PS2_DATA_DDR  &= ~(1<<PS2_DATA_BIT);
-    PS2_DATA_PORT |=  (1<<PS2_DATA_BIT);
-}
-static inline 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);
-}
-
 static inline uint16_t wait_clock_lo(uint16_t us)
 {
-    while (clock_in()  && us) { asm(""); _delay_us(1); us--; }
+    while (clock_in()  && us) { asm(""); wait_us(1); us--; }
     return us;
 }
 static inline uint16_t wait_clock_hi(uint16_t us)
 {
-    while (!clock_in() && us) { asm(""); _delay_us(1); us--; }
+    while (!clock_in() && us) { asm(""); wait_us(1); us--; }
     return us;
 }
 static inline uint16_t wait_data_lo(uint16_t us)
 {
-    while (data_in() && us)  { asm(""); _delay_us(1); us--; }
+    while (data_in() && us)  { asm(""); wait_us(1); us--; }
     return us;
 }
 static inline uint16_t wait_data_hi(uint16_t us)
 {
-    while (!data_in() && us)  { asm(""); _delay_us(1); us--; }
+    while (!data_in() && us)  { asm(""); wait_us(1); us--; }
     return us;
 }
 
diff --git a/protocol/ps2_busywait.c b/protocol/ps2_busywait.c
index 05dd7b27e..a64933219 100644
--- a/protocol/ps2_busywait.c
+++ b/protocol/ps2_busywait.c
@@ -40,8 +40,9 @@ POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include <stdbool.h>
-#include <util/delay.h>
+#include "wait.h"
 #include "ps2.h"
+#include "ps2_io.h"
 #include "debug.h"
 
 
@@ -58,8 +59,11 @@ uint8_t ps2_error = PS2_ERR_NONE;
 
 void ps2_host_init(void)
 {
+    clock_init();
+    data_init();
+
     // POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20)
-    _delay_ms(2500);
+    wait_ms(2500);
 
     inhibit();
 }
@@ -71,7 +75,7 @@ uint8_t ps2_host_send(uint8_t data)
 
     /* terminate a transmission if we have */
     inhibit();
-    _delay_us(100); // 100us [4]p.13, [5]p.50
+    wait_us(100); // 100us [4]p.13, [5]p.50
 
     /* 'Request to Send' and Start bit */
     data_lo();
@@ -80,7 +84,7 @@ uint8_t ps2_host_send(uint8_t data)
 
     /* Data bit */
     for (uint8_t i = 0; i < 8; i++) {
-        _delay_us(15);
+        wait_us(15);
         if (data&(1<<i)) {
             parity = !parity;
             data_hi();
@@ -92,13 +96,13 @@ uint8_t ps2_host_send(uint8_t data)
     }
 
     /* Parity bit */
-    _delay_us(15);
+    wait_us(15);
     if (parity) { data_hi(); } else { data_lo(); }
     WAIT(clock_hi, 50, 4);
     WAIT(clock_lo, 50, 5);
 
     /* Stop bit */
-    _delay_us(15);
+    wait_us(15);
     data_hi();
 
     /* Ack */
diff --git a/protocol/ps2_io.h b/protocol/ps2_io.h
new file mode 100644
index 000000000..a46a358e7
--- /dev/null
+++ b/protocol/ps2_io.h
@@ -0,0 +1,15 @@
+#ifndef PS2_IO_H
+#define PS2_IO_H
+
+
+void clock_init(void);
+void clock_lo(void);
+void clock_hi(void);
+bool clock_in(void);
+
+void data_init(void);
+void data_lo(void);
+void data_hi(void);
+bool data_in(void);
+
+#endif
diff --git a/protocol/ps2_io_avr.c b/protocol/ps2_io_avr.c
new file mode 100644
index 000000000..be13d6696
--- /dev/null
+++ b/protocol/ps2_io_avr.c
@@ -0,0 +1,74 @@
+#include <stdbool.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);
+}
diff --git a/protocol/ps2_io_mbed.c b/protocol/ps2_io_mbed.c
new file mode 100644
index 000000000..83bdcef7f
--- /dev/null
+++ b/protocol/ps2_io_mbed.c
@@ -0,0 +1,60 @@
+#include <stdbool.h>
+#include "ps2_io.h"
+#include "gpio_api.h"
+
+
+static gpio_t clock;
+static gpio_t data;
+
+/*
+ * Clock
+ */
+void clock_init(void)
+{
+    gpio_init(&clock, P0_9);
+    gpio_mode(&clock, OpenDrain|PullNone);
+}
+
+void clock_lo(void)
+{
+    gpio_dir(&clock, PIN_OUTPUT);
+    gpio_write(&clock, 0);
+}
+void clock_hi(void)
+{
+    gpio_dir(&clock, PIN_OUTPUT);
+    gpio_write(&clock, 1);
+}
+
+bool clock_in(void)
+{
+    gpio_dir(&clock, PIN_INPUT);
+    return gpio_read(&clock);
+}
+
+/*
+ * Data
+ */
+void data_init(void)
+{
+    gpio_init(&data, P0_8);
+    gpio_mode(&data, OpenDrain|PullNone);
+}
+
+void data_lo(void)
+{
+    gpio_dir(&data, PIN_OUTPUT);
+    gpio_write(&data, 0);
+}
+
+void data_hi(void)
+{
+    gpio_dir(&data, PIN_OUTPUT);
+    gpio_write(&data, 1);
+}
+
+bool data_in(void)
+{
+    gpio_dir(&data, PIN_INPUT);
+    return gpio_read(&data);
+}
-- 
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