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-rw-r--r--protocol/ibm4704.c41
-rw-r--r--protocol/ibm4704.h1
2 files changed, 17 insertions, 25 deletions
diff --git a/protocol/ibm4704.c b/protocol/ibm4704.c
index 26441ed52f..d3fbcc541d 100644
--- a/protocol/ibm4704.c
+++ b/protocol/ibm4704.c
@@ -20,13 +20,7 @@ uint8_t ibm4704_error = 0;
void ibm4704_init(void)
{
- // POR
- //_delay_ms(2500);
- //while ( 0xA3 != ibm4704_recv() ) ;
-
inhibit();
- DDRD |= 1<<3;
- PORTD &= ~(1<<3);
}
uint8_t ibm4704_send(uint8_t data)
@@ -37,44 +31,43 @@ uint8_t ibm4704_send(uint8_t data)
/* Request to send */
idle();
clock_lo();
-PIND |= 1<<3;
/* wait for Start bit(Clock:lo/Data:hi) */
WAIT(data_hi, 300, 0x30);
/* Data bit */
for (uint8_t i = 0; i < 8; i++) {
- WAIT(clock_hi, 100, 0x31);
+ WAIT(clock_hi, 100, 0x40+i);
//_delay_us(5);
-PIND |= 1<<3;
if (data&(1<<i)) {
parity = !parity;
data_hi();
} else {
data_lo();
}
- WAIT(clock_lo, 100, 0x32);
+ WAIT(clock_lo, 100, 0x48+i);
}
/* Parity bit */
- WAIT(clock_hi, 100, 4);
-PIND |= 1<<3;
+ WAIT(clock_hi, 100, 0x34);
if (parity) { data_hi(); } else { data_lo(); }
- WAIT(clock_lo, 100, 5);
+ WAIT(clock_lo, 100, 0x35);
/* Stop bit */
- WAIT(clock_hi, 100, 4);
+ WAIT(clock_hi, 100, 0x34);
data_hi();
/* End */
- WAIT(data_lo, 100, 6);
+ WAIT(data_lo, 100, 0x36);
inhibit();
_delay_us(200); // wait to recover clock to hi
return 0;
ERROR:
inhibit();
-xprintf("x%02X ", ibm4704_error);
+ if (ibm4704_error >= 0x30) {
+ xprintf("x%02X ", ibm4704_error);
+ }
_delay_us(200); // wait to recover clock to hi
return -1;
}
@@ -110,10 +103,10 @@ uint8_t ibm4704_recv(void)
_delay_us(5); // wait for line settles
/* start bit */
- WAIT(clock_lo, 100, 1); // wait for keyboard to send
- WAIT(data_hi, 100, 2); // can be delayed that long
+ WAIT(clock_lo, 100, 0x11); // wait for keyboard to send
+ WAIT(data_hi, 100, 0x12); // can be delayed that long
- WAIT(clock_hi, 100, 3); // first rising edge which can take longer
+ WAIT(clock_hi, 100, 0x13); // first rising edge which can take longer
/* data */
for (uint8_t i = 0; i < 8; i++) {
WAIT(clock_hi, 100, 0x20+i);
@@ -126,22 +119,22 @@ uint8_t ibm4704_recv(void)
}
/* parity */
- WAIT(clock_hi, 100, 7);
+ WAIT(clock_hi, 100, 0x17);
if (data_in() != parity) {
ibm4704_error = IBM4704_ERR_PARITY;
goto ERROR;
}
- WAIT(clock_lo, 150, 8);
+ WAIT(clock_lo, 150, 0x18);
/* stop bit */
- WAIT(clock_hi, 100, 9);
- WAIT(data_lo, 1, 9);
+ WAIT(clock_hi, 100, 0x19);
+ WAIT(data_lo, 1, 0x19);
inhibit();
_delay_us(200); // wait to recover clock to hi
return data;
ERROR:
- if (ibm4704_error > 2) {
+ if (ibm4704_error > 0x12) {
xprintf("x%02X ", ibm4704_error);
}
inhibit();
diff --git a/protocol/ibm4704.h b/protocol/ibm4704.h
index ff8a5b7718..618cce6be0 100644
--- a/protocol/ibm4704.h
+++ b/protocol/ibm4704.h
@@ -5,7 +5,6 @@ Copyright 2014 Jun WAKO <wakojun@gmail.com>
#define IBM4704_H
#define IBM4704_ERR_NONE 0
-#define IBM4704_ERR_STARTBIT 1
#define IBM4704_ERR_PARITY 0x70