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-rw-r--r--protocol/ps2_mouse.c122
1 files changed, 50 insertions, 72 deletions
diff --git a/protocol/ps2_mouse.c b/protocol/ps2_mouse.c
index f796b2b4de..701d97213c 100644
--- a/protocol/ps2_mouse.c
+++ b/protocol/ps2_mouse.c
@@ -1,5 +1,5 @@
/*
-Copyright 2011 Jun Wako <wakojun@gmail.com>
+Copyright 2011,2013 Jun Wako <wakojun@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -32,27 +32,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
# define phex16(h)
#endif
-// disable when errors occur 255 times.
-#define ERROR_RETURN() do { \
- if (ps2_error) { \
- if (ps2_mouse_error_count < 255) { \
- ps2_mouse_error_count++; \
- } else { \
- ps2_mouse_error_count = 0; \
- ps2_mouse_enable = false; \
- } \
- return ps2_error; \
- } \
-} while (0)
-
-/*
-TODO
-----
-- Stream mode
-- Tracpoint command support: needed
-- Middle button + move = Wheel traslation
-*/
bool ps2_mouse_enable = true;
uint8_t ps2_mouse_x = 0;
uint8_t ps2_mouse_y = 0;
@@ -69,85 +49,50 @@ uint8_t ps2_mouse_init(void) {
ps2_host_init();
- // Reset
- rcv = ps2_host_send(0xFF);
- print("ps2_mouse_init: send 0xFF: ");
- phex(ps2_error); print("\n");
- ERROR_RETURN();
+ // Not reliable: sometime fail to initialize mouse
- // ACK
- rcv = ps2_host_recv();
- print("ps2_mouse_init: read ACK: ");
+ // send Reset
+ _delay_ms(1000); // wait for powering up
+ rcv = ps2_host_send(0xFF);
+ print("ps2_mouse_init: send Reset: ");
phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
- // BAT takes some time
- _delay_ms(100);
+ // read completion code of BAT
+ //_delay_ms(1000); // wait for Basic Assurance Test
rcv = ps2_host_recv();
print("ps2_mouse_init: read BAT: ");
phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
- // Device ID
+ // read Device ID
rcv = ps2_host_recv();
print("ps2_mouse_init: read DevID: ");
phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
- // Enable data reporting
- ps2_host_send(0xF4);
+ // send Enable Data Reporting
+ rcv = ps2_host_send(0xF4);
print("ps2_mouse_init: send 0xF4: ");
- phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- // ACK
- rcv = ps2_host_recv();
- print("ps2_mouse_init: read ACK: ");
phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
- // Set Remote mode
- ps2_host_send(0xF0);
+ // send Set Remote mode
+ rcv = ps2_host_send(0xF0);
print("ps2_mouse_init: send 0xF0: ");
- phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- // ACK
- rcv = ps2_host_recv();
- print("ps2_mouse_init: read ACK: ");
phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
return 0;
}
-/*
-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)
-*/
uint8_t ps2_mouse_read(void)
{
uint8_t rcv;
if (!ps2_mouse_enable) return 1;
- ps2_host_send(0xEB);
- ERROR_RETURN();
-
- rcv=ps2_host_recv();
- ERROR_RETURN();
+ rcv = ps2_host_send(0xEB);
if(rcv==0xFA) {
- ps2_mouse_btn = ps2_host_recv();
- ERROR_RETURN();
- ps2_mouse_x = ps2_host_recv();
- ERROR_RETURN();
- ps2_mouse_y = ps2_host_recv();
- ERROR_RETURN();
+ ps2_mouse_btn = ps2_host_recv_response();
+ ps2_mouse_x = ps2_host_recv_response();
+ ps2_mouse_y = ps2_host_recv_response();
}
return 0;
}
@@ -216,3 +161,36 @@ void ps2_mouse_print(void)
phex(ps2_mouse_x); print(" ");
phex(ps2_mouse_y); print("\n");
}
+
+
+/* PS/2 Mouse Synopsis
+ * http://www.computer-engineering.org/ps2mouse/
+ *
+ * Command:
+ * 0xFF: Reset
+ * 0xF6: Set Defaults Sampling; rate=100, resolution=4cnt/mm, scaling=1:1, reporting=disabled
+ * 0xF5: Disable Data Reporting
+ * 0xF4: Enable Data Reporting
+ * 0xF3: Set Sample Rate
+ * 0xF2: Get Device ID
+ * 0xF0: Set Remote Mode
+ * 0xEB: Read Data
+ * 0xEA: Set Stream Mode
+ * 0xE9: Status Request
+ * 0xE8: Set Resolution
+ * 0xE7: Set Scaling 2:1
+ * 0xE6: Set Scaling 1:1
+ *
+ * Mode:
+ * Stream Mode: devices sends the data when it changs its state
+ * Remote Mode: host polls the data periodically
+ *
+ * This code uses Remote Mode and polls the data with Read Data(0xEB).
+ *
+ * Data format:
+ * byte|7 6 5 4 3 2 1 0
+ * ----+--------------------------------------------------------------
+ * 0|Yovflw Xovflw Ysign Xsign 1 Middle Right Left
+ * 1| X movement(0-255)
+ * 2| Y movement(0-255)
+ */