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Fix ps2_host_recv_response

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This commit is contained in:
tmk 2013-11-26 14:31:57 +09:00
parent 9ae9742ac5
commit 9d26053f1c
3 changed files with 12 additions and 13 deletions
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11
protocol/ps2_busywait.c
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@ -104,6 +104,7 @@ uint8_t ps2_host_send(uint8_t data)
WAIT(clock_hi, 50, 8);
WAIT(data_hi, 50, 9);
inhibit();
res = ps2_host_recv_response();
ERROR:
inhibit();
@ -113,12 +114,14 @@ ERROR:
/* receive data when host want else inhibit communication */
uint8_t ps2_host_recv_response(void)
{
// TODO:
// Command might take 20ms to response([3]p.21)
// TrackPoint might take 25ms ([5]2.7)
// 250 * 100us(wait for start bit in ps2_host_recv)
uint8_t data = 0;
uint8_t try = 200;
while (try-- && (data = ps2_host_recv())) ;
uint8_t try = 250;
do {
data = ps2_host_recv();
} while (try-- && ps2_error);
return data;
}
@ -172,7 +175,7 @@ uint8_t ps2_host_recv(void)
return data;
ERROR:
if (ps2_error > PS2_ERR_STARTBIT3) {
printf("x%02X\n", ps2_error);
xprintf("x%02X\n", ps2_error);
}
inhibit();
return 0;