diff options
Diffstat (limited to 'protocol')
| -rw-r--r-- | protocol/ibm4704.c | 41 | ||||
| -rw-r--r-- | protocol/ibm4704.h | 1 |
2 files changed, 17 insertions, 25 deletions
diff --git a/protocol/ibm4704.c b/protocol/ibm4704.c index 26441ed52..d3fbcc541 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 ff8a5b771..618cce6be 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 |