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Port ps2_usb to mbed

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This commit is contained in:
tmk 2014-06-19 16:13:35 +09:00
parent 80c3ff5fa0
commit 4c8e0fd0bd
15 changed files with 343 additions and 90 deletions
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16
protocol/ps2_busywait.c
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@ -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 */