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add error handling to ps2_mouse

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This commit is contained in:
tmk 2011-01-04 20:30:23 +09:00
parent 2a562a4191
commit 7272c65d3d
3 changed files with 58 additions and 10 deletions
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48
ps2_mouse.c
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@ -15,65 +15,91 @@
# 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
----
- Error handling
- 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;
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 ps2_mouse_init(void) {
uint8_t rcv;
if (!ps2_mouse_enable) return 1;
// Reset
rcv = ps2_host_send(0xFF);
print("ps2_mouse_init: send 0xFF: ");
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();
// BAT takes some time
_delay_ms(100);
rcv = ps2_host_recv();
print("ps2_mouse_init: read BAT: ");
phex(rcv); phex(ps2_error); print("\n");
ERROR_RETURN();
// 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);
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);
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();
if (ps2_error) ps2_mouse_error_count++;
return 0;
}
/*
@ -84,18 +110,27 @@ Data format:
1 x: X movement(0-255)
2 y: Y movement(0-255)
*/
void ps2_mouse_read(void)
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();
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();
}
if (ps2_error) ps2_mouse_error_count++;
return 0;
}
bool ps2_mouse_changed(void)
@ -107,6 +142,9 @@ bool ps2_mouse_changed(void)
void ps2_mouse_usb_send(void)
{
static bool scrolled = false;
if (!ps2_mouse_enable) return;
if (ps2_mouse_changed()) {
int8_t x, y, v, h;
x = y = v = h = 0;