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authortmk2011-01-02 23:52:13 +0900
committertmk2011-01-02 23:52:13 +0900
commit2a562a4191a5b9e88731efb5eabd921821f25f7e (patch)
tree20f5bb311ff99ced3dd8ee2d9430e2fbe8183f7b /ps2_mouse.c
parent1ed336a06499c1baee2421141d59d115f0ee3c4b (diff)
Add PS/2 mouse support to connect TrackPoint Unit.
Change build options: Makefile and config.h. See README.
Diffstat (limited to 'ps2_mouse.c')
-rw-r--r--ps2_mouse.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/ps2_mouse.c b/ps2_mouse.c
new file mode 100644
index 000000000..e22ce6337
--- /dev/null
+++ b/ps2_mouse.c
@@ -0,0 +1,161 @@
+#include <stdbool.h>
+#include<avr/io.h>
+#include<util/delay.h>
+#include "ps2.h"
+#include "ps2_mouse.h"
+#include "usb_mouse.h"
+
+#define PS2_MOUSE_DEBUG
+#ifdef PS2_MOUSE_DEBUG
+# include "print.h"
+# include "debug.h"
+#else
+# define print(s)
+# define phex(h)
+# define phex16(h)
+#endif
+
+/*
+TODO
+----
+- Error handling
+- Stream mode
+- Tracpoint command support: needed
+- Middle button + move = Wheel traslation
+*/
+uint8_t ps2_mouse_x = 0;
+uint8_t ps2_mouse_y = 0;
+uint8_t ps2_mouse_btn = 0;
+uint8_t ps2_mouse_error_count = 0;
+static uint8_t ps2_mouse_btn_prev = 0;
+
+void ps2_mouse_init(void) {
+ uint8_t rcv;
+
+ // Reset
+ rcv = ps2_host_send(0xFF);
+ print("ps2_mouse_init: send 0xFF: ");
+ phex(ps2_error); print("\n");
+
+ // ACK
+ rcv = ps2_host_recv();
+ print("ps2_mouse_init: read ACK: ");
+ phex(rcv); phex(ps2_error); print("\n");
+
+ // BAT takes some time
+ _delay_ms(100);
+ rcv = ps2_host_recv();
+ print("ps2_mouse_init: read BAT: ");
+ phex(rcv); phex(ps2_error); print("\n");
+
+ // Device ID
+ rcv = ps2_host_recv();
+ print("ps2_mouse_init: read DevID: ");
+ phex(rcv); phex(ps2_error); print("\n");
+
+ // Enable data reporting
+ ps2_host_send(0xF4);
+ print("ps2_mouse_init: send 0xF4: ");
+ phex(ps2_error); print("\n");
+
+ // ACK
+ rcv = ps2_host_recv();
+ print("ps2_mouse_init: read ACK: ");
+ phex(rcv); phex(ps2_error); print("\n");
+
+ // Set Remote mode
+ ps2_host_send(0xF0);
+ print("ps2_mouse_init: send 0xF0: ");
+ phex(ps2_error); print("\n");
+
+ // ACK
+ rcv = ps2_host_recv();
+ print("ps2_mouse_init: read ACK: ");
+ phex(rcv); phex(ps2_error); print("\n");
+
+ if (ps2_error) ps2_mouse_error_count++;
+}
+
+/*
+Data format:
+ bit: 7 6 5 4 3 2 1 0
+-----------------------------------------------------------------------
+0 btn: Yovflw Xovflw Ysign Xsign 1 Middle Right Left
+1 x: X movement(0-255)
+2 y: Y movement(0-255)
+*/
+void ps2_mouse_read(void)
+{
+ uint8_t rcv;
+
+ ps2_host_send(0xEB);
+ rcv=ps2_host_recv();
+ if(rcv==0xFA) {
+ ps2_mouse_btn = ps2_host_recv();
+ ps2_mouse_x = ps2_host_recv();
+ ps2_mouse_y = ps2_host_recv();
+ }
+ if (ps2_error) ps2_mouse_error_count++;
+}
+
+bool ps2_mouse_changed(void)
+{
+ return (ps2_mouse_x || ps2_mouse_y || (ps2_mouse_btn & PS2_MOUSE_BTN_MASK) != ps2_mouse_btn_prev);
+}
+
+#define PS2_MOUSE_SCROLL_BUTTON 0x04
+void ps2_mouse_usb_send(void)
+{
+ static bool scrolled = false;
+ if (ps2_mouse_changed()) {
+ int8_t x, y, v, h;
+ x = y = v = h = 0;
+
+ // convert scale of X, Y: PS/2(-256/255) -> USB(-127/127)
+ if (ps2_mouse_btn & (1<<PS2_MOUSE_X_SIGN))
+ x = ps2_mouse_x > 128 ? (int8_t)ps2_mouse_x : -127;
+ else
+ x = ps2_mouse_x < 128 ? (int8_t)ps2_mouse_x : 127;
+
+ if (ps2_mouse_btn & (1<<PS2_MOUSE_Y_SIGN))
+ y = ps2_mouse_y > 128 ? (int8_t)ps2_mouse_y : -127;
+ else
+ y = ps2_mouse_y < 128 ? (int8_t)ps2_mouse_y : 127;
+
+ // Y is needed to reverse
+ y = -y;
+
+ if (ps2_mouse_btn & PS2_MOUSE_SCROLL_BUTTON) {
+ // scroll
+ if (x > 0 || x < 0) h = (x > 64 ? 64 : (x < -64 ? -64 :x));
+ if (y > 0 || y < 0) v = (y > 64 ? 64 : (y < -64 ? -64 :y));
+ if (h || v) {
+ scrolled = true;
+ usb_mouse_send(0,0, -v/16, h/16, 0);
+ _delay_ms(100);
+ }
+ } else if (!scrolled && (ps2_mouse_btn_prev & PS2_MOUSE_SCROLL_BUTTON)) {
+ usb_mouse_send(0,0,0,0, PS2_MOUSE_SCROLL_BUTTON);
+ _delay_ms(100);
+ usb_mouse_send(0,0,0,0, 0);
+ } else {
+ scrolled = false;
+ usb_mouse_send(x, y, 0, 0, ps2_mouse_btn & PS2_MOUSE_BTN_MASK);
+ }
+
+ ps2_mouse_btn_prev = (ps2_mouse_btn & PS2_MOUSE_BTN_MASK);
+ ps2_mouse_print();
+ }
+ ps2_mouse_x = 0;
+ ps2_mouse_y = 0;
+ ps2_mouse_btn = 0;
+}
+
+void ps2_mouse_print(void)
+{
+ if (!debug_mouse) return;
+ print("ps2_mouse[btn|x y]: ");
+ phex(ps2_mouse_btn); print("|");
+ phex(ps2_mouse_x); print(" ");
+ phex(ps2_mouse_y); print("\n");
+}