diff options
| -rw-r--r-- | converter/ibm4704_usb/Makefile | 93 | ||||
| -rw-r--r-- | converter/ibm4704_usb/README.md | 31 | ||||
| -rw-r--r-- | converter/ibm4704_usb/config.h | 73 | ||||
| -rw-r--r-- | converter/ibm4704_usb/keymap_common.c | 30 | ||||
| -rw-r--r-- | converter/ibm4704_usb/keymap_common.h | 73 | ||||
| -rw-r--r-- | converter/ibm4704_usb/keymap_plain.c | 28 | ||||
| -rw-r--r-- | converter/ibm4704_usb/led.c | 24 | ||||
| -rw-r--r-- | converter/ibm4704_usb/matrix.c | 179 | ||||
| -rw-r--r-- | protocol/ibm4704.c | 150 | ||||
| -rw-r--r-- | protocol/ibm4704.h | 111 |
10 files changed, 792 insertions, 0 deletions
diff --git a/converter/ibm4704_usb/Makefile b/converter/ibm4704_usb/Makefile new file mode 100644 index 0000000000..bc0f9fde75 --- /dev/null +++ b/converter/ibm4704_usb/Makefile @@ -0,0 +1,93 @@ +# Target file name (without extension). +TARGET = ibm4704_usb + +# Directory common source filess exist +TOP_DIR = ../.. + +# Directory keyboard dependent files exist +TARGET_DIR = . + +# project specific files +SRC = keymap_common.c \ + matrix.c \ + led.c \ + protocol/ibm4704.c + +ifdef KEYMAP + SRC := keymap_$(KEYMAP).c $(SRC) +else + SRC := keymap_plain.c $(SRC) +endif + +CONFIG_H = config.h + + +# MCU name +#MCU = at90usb1287 +MCU = atmega32u4 + +# Processor frequency. +# This will define a symbol, F_CPU, in all source code files equal to the +# processor frequency in Hz. You can then use this symbol in your source code to +# calculate timings. Do NOT tack on a 'UL' at the end, this will be done +# automatically to create a 32-bit value in your source code. +# +# This will be an integer division of F_USB below, as it is sourced by +# F_USB after it has run through any CPU prescalers. Note that this value +# does not *change* the processor frequency - it should merely be updated to +# reflect the processor speed set externally so that the code can use accurate +# software delays. +F_CPU = 16000000 + + +# +# LUFA specific +# +# Target architecture (see library "Board Types" documentation). +ARCH = AVR8 + +# Input clock frequency. +# This will define a symbol, F_USB, in all source code files equal to the +# input clock frequency (before any prescaling is performed) in Hz. This value may +# differ from F_CPU if prescaling is used on the latter, and is required as the +# raw input clock is fed directly to the PLL sections of the AVR for high speed +# clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL' +# at the end, this will be done automatically to create a 32-bit value in your +# source code. +# +# If no clock division is performed on the input clock inside the AVR (via the +# CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU. +F_USB = $(F_CPU) + +# Interrupt driven control endpoint task(+60) +OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT + + +# Boot Section Size in *bytes* +# Teensy halfKay 512 +# Teensy++ halfKay 1024 +# Atmel DFU loader 4096 +# LUFA bootloader 4096 +# USBaspLoader 2048 +OPT_DEFS += -DBOOTLOADER_SIZE=4096 + + +# Build Options +# comment out to disable the options. +# +#BOOTMAGIC_ENABLE = yes # Virtual DIP switch configuration(+1000) +#MOUSEKEY_ENABLE = yes # Mouse keys(+4700) +##EXTRAKEY_ENABLE = yes # Audio control and System control(+450) +CONSOLE_ENABLE = yes # Console for debug(+400) +COMMAND_ENABLE = yes # Commands for debug and configuration +#NKRO_ENABLE = yes # USB Nkey Rollover - not yet supported in LUFA + + +# Search Path +VPATH += $(TARGET_DIR) +VPATH += $(TOP_DIR) + +include $(TOP_DIR)/protocol.mk +include $(TOP_DIR)/protocol/lufa.mk +include $(TOP_DIR)/common.mk +include $(TOP_DIR)/rules.mk diff --git a/converter/ibm4704_usb/README.md b/converter/ibm4704_usb/README.md new file mode 100644 index 0000000000..1e29945d05 --- /dev/null +++ b/converter/ibm4704_usb/README.md @@ -0,0 +1,31 @@ +IBM 4704 to USB keyboard converter +=======----======================= +This firmware converts IBM 4704 keyboard protocol to USB HID. + + +Connect Wires +------------- +In case of Teensy2.0(ATMega32U4): + +1. Connect Vcc and GND. +2. Connect Clock and Data line. + - Clock is on PD1 and Data on PD2. +3. Optionally you need pull-up register. 1KOhm is OK? + +To change pin configuration edit config.h. + + +Build Firmware +-------------- +Just run `make`: + + $ make + +To select keymap: + + $ make KEYMAP=[plain|...] + + +Keymap +------ +Several version of keymap are available in advance but you are recommended to define your favorite layout yourself. To define your own keymap create file named `keymap_<name>.c` and see keymap document(you can find in top README.md) and existent keymap files. diff --git a/converter/ibm4704_usb/config.h b/converter/ibm4704_usb/config.h new file mode 100644 index 0000000000..8c2d08f6f2 --- /dev/null +++ b/converter/ibm4704_usb/config.h @@ -0,0 +1,73 @@ +/* +Copyright 2014 Jun Wako <wakojun@gmail.com> + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef CONFIG_H +#define CONFIG_H + +#include <avr/interrupt.h> + +#define VENDOR_ID 0xFEED +#define PRODUCT_ID 0x4707 +#define DEVICE_VER 0x0001 +#define MANUFACTURER t.m.k. +#define PRODUCT IBM 4704 keyboard converter +#define DESCRIPTION convert IBM 4704 keyboard to USB + + +/* matrix size */ +#define MATRIX_ROWS 16 // keycode bit3-6 +#define MATRIX_COLS 8 // keycode bit0-2 + + +/* key combination for command */ +#define IS_COMMAND() ( \ + keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \ +) + + + +/* + * Busywait + */ +#define IBM4704_CLOCK_PORT PORTD +#define IBM4704_CLOCK_PIN PIND +#define IBM4704_CLOCK_DDR DDRD +#define IBM4704_CLOCK_BIT 1 +#define IBM4704_DATA_PORT PORTD +#define IBM4704_DATA_PIN PIND +#define IBM4704_DATA_DDR DDRD +#define IBM4704_DATA_BIT 2 + +/* + * Pin interrupt + */ +#ifdef IBM4704_USE_INT +#define IBM4704_INT_INIT() do { \ + EICRA |= ((1<<ISC11) | \ + (0<<ISC10)); \ +} while (0) +#define IBM4704_INT_ON() do { \ + EIMSK |= (1<<INT1); \ +} while (0) +#define IBM4704_INT_OFF() do { \ + EIMSK &= ~(1<<INT1); \ +} while (0) +#define IBM4704_INT_VECT INT1_vect +#endif + + +#endif diff --git a/converter/ibm4704_usb/keymap_common.c b/converter/ibm4704_usb/keymap_common.c new file mode 100644 index 0000000000..241d2e33b1 --- /dev/null +++ b/converter/ibm4704_usb/keymap_common.c @@ -0,0 +1,30 @@ +/* +Copyright 2011,2012,2013 Jun Wako <wakojun@gmail.com> + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ +#include "keymap_common.h" + + +/* translates key to keycode */ +uint8_t keymap_key_to_keycode(uint8_t layer, key_t key) +{ + return pgm_read_byte(&keymaps[(layer)][(key.row)][(key.col)]); +} + +/* translates Fn keycode to action */ +action_t keymap_fn_to_action(uint8_t keycode) +{ + return (action_t){ .code = pgm_read_word(&fn_actions[FN_INDEX(keycode)]) }; +} diff --git a/converter/ibm4704_usb/keymap_common.h b/converter/ibm4704_usb/keymap_common.h new file mode 100644 index 0000000000..8955baeb59 --- /dev/null +++ b/converter/ibm4704_usb/keymap_common.h @@ -0,0 +1,73 @@ +/* +Copyright 2011,2012,2013 Jun Wako <wakojun@gmail.com> + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ +#ifndef KEYMAP_COMMON_H +#define KEYMAP_COMMON_H + +#include <stdint.h> +#include <stdbool.h> +#include <avr/pgmspace.h> +#include "keycode.h" +#include "action.h" +#include "action_macro.h" +#include "report.h" +#include "print.h" +#include "debug.h" +#include "keymap.h" + + +// 32*8(256) byte array which converts PS/2 code into USB code +extern const uint8_t keymaps[][MATRIX_ROWS][MATRIX_COLS]; +extern const uint16_t fn_actions[]; + + +/* Original keys */ +#define KEYMAP( \ + K00,K18,K19,K1A,K10,K11,K12,K08,K09,K0A,K0F,K1F,K0D,K0C,K0E, \ + K04,K05,K06,K13,K14,K15,K16,K17,K01,K02,K03,K1B,K1C,K1D, \ + K20,K21,K22,K23,K24,K25,K26,K27,K28,K29,K2A,K2B,K2C,K2D, \ + K30,K3E,K32,K33,K34,K35,K36,K37,K38,K39,K3A,K3B,K3D, \ + K31,K41,K3F, K40, K42,K2F \ +) { \ + { KC_##K00, KC_##K01, KC_##K02, KC_##K03, KC_##K04, KC_##K05, KC_##K06, KC_NO }, \ + { KC_##K08, KC_##K09, KC_##K0A, KC_NO, KC_##K0C, KC_##K0D, KC_##K0E, KC_##K0F }, \ + { KC_##K10, KC_##K11, KC_##K12, KC_##K13, KC_##K14, KC_##K15, KC_##K16, KC_##K17 }, \ + { KC_##K18, KC_##K19, KC_##K1A, KC_##K1B, KC_##K1C, KC_##K1D, KC_NO, KC_##K1F }, \ + { KC_##K20, KC_##K21, KC_##K22, KC_##K23, KC_##K24, KC_##K25, KC_##K26, KC_##K27 }, \ + { KC_##K28, KC_##K29, KC_##K2A, KC_##K2B, KC_##K2C, KC_##K2D, KC_NO, KC_##K2F }, \ + { KC_##K30, KC_##K31, KC_##K32, KC_##K33, KC_##K34, KC_##K35, KC_##K36, KC_##K37 }, \ + { KC_##K38, KC_##K39, KC_##K3A, KC_##K3B, KC_NO, KC_##K3D, KC_##K3E, KC_##K3F }, \ + { KC_##K40, KC_##K41, KC_##K42, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \ + { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \ + { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \ + { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \ + { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \ + { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \ + { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \ + { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \ +} + +#endif + +/* + { K48, K49, K4A, K4B, K4C, K4D, K4E, K4F }, \ + { K50, K51, K52, K53, K54, K55, K56, K57 }, \ + { K58, K59, K5A, K5B, K5C, K5D, K5E, K5F }, \ + { K60, K61, K62, K63, K64, K65, K66, K67 }, \ + { K68, K69, K6A, K6B, K6C, K6D, K6E, K6F }, \ + { K70, K71, K72, K73, K74, K75, K76, K77 }, \ + { K78, K79, K7A, K7B, K7C, K7D, K7E, K7F }, \ +*/ diff --git a/converter/ibm4704_usb/keymap_plain.c b/converter/ibm4704_usb/keymap_plain.c new file mode 100644 index 0000000000..0ca4f14c16 --- /dev/null +++ b/converter/ibm4704_usb/keymap_plain.c @@ -0,0 +1,28 @@ +#include "keymap_common.h" + + +const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = { + /* 0: default + * ,-----------------------------------------------------------. + * | `| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|???|BS | + * |-----------------------------------------------------------| + * |Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| \| + * |-----------------------------------------------------------| + * |Ctrl | A| S| D| F| G| H| J| K| L| ;| '|???|Ret | + * |-----------------------------------------------------------| + * |Shif|???| Z| X| C| V| B| N| M| ,| ,| /|???|Shift | + * |-----------------------------------------------------------| + * |Ctrl |Gui|Alt | Space |Alt |Gui|Ctrl | + * `-----------------------------------------------------------' + */ + KEYMAP( + ESC, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, MINS,EQL, BSLS,GRV, \ + TAB, Q, W, E, R, T, Y, U, I, O, P, LBRC,RBRC,BSPC, \ + LCTL,A, S, D, F, G, H, J, K, L, SCLN,QUOT,NO, ENT, \ + LSFT,NO, Z, X, C, V, B, N, M, COMM,DOT, SLSH, RSFT, \ + LCTL,LGUI,LALT, SPC, RGUI,RCTL \ + ), +}; + +const uint16_t PROGMEM fn_actions[] = { +}; diff --git a/converter/ibm4704_usb/led.c b/converter/ibm4704_usb/led.c new file mode 100644 index 0000000000..f76545f0ba --- /dev/null +++ b/converter/ibm4704_usb/led.c @@ -0,0 +1,24 @@ +/* +Copyright 2011 Jun Wako <wakojun@gmail.com> + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "stdint.h" +#include "led.h" + + +void led_set(uint8_t usb_led) +{ +} diff --git a/converter/ibm4704_usb/matrix.c b/converter/ibm4704_usb/matrix.c new file mode 100644 index 0000000000..796e2d0642 --- /dev/null +++ b/converter/ibm4704_usb/matrix.c @@ -0,0 +1,179 @@ +/* +Copyright 2014 Jun Wako <wakojun@gmail.com> + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <stdint.h> +#include <stdbool.h> +#include <avr/io.h> +#include <util/delay.h> +#include "action.h" +#include "print.h" +#include "debug.h" +#include "util.h" +#include "ibm4704.h" +#include "matrix.h" + + +static void matrix_make(uint8_t code); +static void matrix_break(uint8_t code); +static void matrix_clear(void); + + +/* + * Matrix Array usage: + * IBM 4704 scan codes are assigned into 128(16x8)-cell matrix. + * + * 8bit wide + * +---------+ + * 0| | + * :| XX | 00-7F + * f| | + * +---------+ + * + * Exceptions: + */ +static uint8_t matrix[MATRIX_ROWS]; + +// scan code bits 7654 3210 +// R:row/C:column -RRR RCCC +#define ROW(code) ((code>>3)&0x0f) +#define COL(code) (code&0x07) + + +inline +uint8_t matrix_rows(void) +{ + return MATRIX_ROWS; +} + +inline +uint8_t matrix_cols(void) +{ + return MATRIX_COLS; +} + +static void enable_break(void) +{ + uint8_t ret; + for (uint8_t code = 0; code < 0x80; code++) { + while (ibm4704_send(0x80|code) != 0) { + print("z"); + } + _delay_ms(1); + ret = ibm4704_recv(); + if (ret!=0xFF) { + xprintf("%0X: %0X ", code, ret); + } + } + _delay_us(100); + print("End\n"); + while (ibm4704_send(0xFF) != 0) { + print("Z"); + } // End +} + +void matrix_init(void) +{ + debug_enable = true; + + ibm4704_init(); + matrix_clear(); + + xprintf("------\n"); + enable_break(); + //while (ibm4704_send(0x8C) != 0) ; + //while (ibm4704_send(0xFF) != 0) ; +} + +/* + * IBM 4704 Scan Code + */ +uint8_t matrix_scan(void) +{ + uint8_t code = ibm4704_recv(); + if (code==0xFF) { + // Not receivd + return 0; + } else if ((code&0x78)==0x78) { + // 0xFF-F8 and 0x7F-78 is not scan code + dprintf("Error: %0X\n", code); + matrix_clear(); + return 0; + } else if (code&0x80) { + matrix_make(code); + } else { + matrix_break(code); + } + return 1; +} + +inline +bool matrix_has_ghost(void) +{ + return false; +} + +inline +bool matrix_is_on(uint8_t row, uint8_t col) +{ + return (matrix[row] & (1<<col)); +} + +inline +uint8_t matrix_get_row(uint8_t row) +{ + return matrix[row]; +} + +void matrix_print(void) +{ + print("\nr/c 01234567\n"); + for (uint8_t row = 0; row < matrix_rows(); row++) { + // TODO: use new function + phex(row); print(": "); + pbin_reverse(matrix_get_row(row)); + print("\n"); + } +} + +uint8_t matrix_key_count(void) +{ + uint8_t count = 0; + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + count += bitpop(matrix[i]); + } + return count; +} + + + +inline +static void matrix_make(uint8_t code) +{ + matrix[ROW(code)] |= 1<<COL(code); +} + +inline +static void matrix_break(uint8_t code) +{ + matrix[ROW(code)] &= ~(1<<COL(code)); +} + +inline +static void matrix_clear(void) +{ + for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00; +} diff --git a/protocol/ibm4704.c b/protocol/ibm4704.c new file mode 100644 index 0000000000..26441ed52f --- /dev/null +++ b/protocol/ibm4704.c @@ -0,0 +1,150 @@ +/* +Copyright 2010,2011,2012,2013 Jun WAKO <wakojun@gmail.com> +*/ +#include <stdbool.h> +#include <util/delay.h> +#include "debug.h" +#include "ibm4704.h" + + +#define WAIT(stat, us, err) do { \ + if (!wait_##stat(us)) { \ + ibm4704_error = err; \ + goto ERROR; \ + } \ +} while (0) + + +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) +{ + bool parity = true; // odd parity + ibm4704_error = 0; + + /* 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); + //_delay_us(5); +PIND |= 1<<3; + if (data&(1<<i)) { + parity = !parity; + data_hi(); + } else { + data_lo(); + } + WAIT(clock_lo, 100, 0x32); + } + + /* Parity bit */ + WAIT(clock_hi, 100, 4); +PIND |= 1<<3; + if (parity) { data_hi(); } else { data_lo(); } + WAIT(clock_lo, 100, 5); + + /* Stop bit */ + WAIT(clock_hi, 100, 4); + data_hi(); + + /* End */ + WAIT(data_lo, 100, 6); + + inhibit(); + _delay_us(200); // wait to recover clock to hi + return 0; +ERROR: + inhibit(); +xprintf("x%02X ", ibm4704_error); + _delay_us(200); // wait to recover clock to hi + return -1; +} + +/* receive data when host want else inhibit communication */ +uint8_t ibm4704_recv_response(void) +{ + // 250 * 100us(wait start bit in ibm4704_recv) + uint8_t data = 0; + uint8_t try = 250; + do { + data = ibm4704_recv(); + } while (try-- && ibm4704_error); + return data; +} + +/* +Keyboard to Host: +Clock ~~~~___~~_~~_~~_~~_~~_~~_~~_~~_~~_~~~~~~~~ H:60us/L:30us + +Data ____~~X==X==X==X==X==X==X==X==X==X________ + | 0 1 2 3 4 5 6 7 P(odd) + | LSB MSB + Start bit(80us) +*/ +uint8_t ibm4704_recv(void) +{ + uint8_t data = 0; + bool parity = true; // odd parity + ibm4704_error = IBM4704_ERR_NONE; + + idle(); + _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_hi, 100, 3); // first rising edge which can take longer + /* data */ + for (uint8_t i = 0; i < 8; i++) { + WAIT(clock_hi, 100, 0x20+i); + //_delay_us(5); + if (data_in()) { + parity = !parity; + data |= (1<<i); + } + WAIT(clock_lo, 150, 0x28+i); + } + + /* parity */ + WAIT(clock_hi, 100, 7); + if (data_in() != parity) { + ibm4704_error = IBM4704_ERR_PARITY; + goto ERROR; + } + WAIT(clock_lo, 150, 8); + + /* stop bit */ + WAIT(clock_hi, 100, 9); + WAIT(data_lo, 1, 9); + + inhibit(); + _delay_us(200); // wait to recover clock to hi + return data; +ERROR: + if (ibm4704_error > 2) { + xprintf("x%02X ", ibm4704_error); + } + inhibit(); + _delay_us(200); // wait to recover clock to hi + return -1; +} diff --git a/protocol/ibm4704.h b/protocol/ibm4704.h new file mode 100644 index 0000000000..ff8a5b7718 --- /dev/null +++ b/protocol/ibm4704.h @@ -0,0 +1,111 @@ +/* +Copyright 2014 Jun WAKO <wakojun@gmail.com> +*/ +#ifndef IBM4704_H +#define IBM4704_H + +#define IBM4704_ERR_NONE 0 +#define IBM4704_ERR_STARTBIT 1 +#define IBM4704_ERR_PARITY 0x70 + + +void ibm4704_init(void); +uint8_t ibm4704_send(uint8_t data); +uint8_t ibm4704_recv_response(void); +uint8_t ibm4704_recv(void); + + +/* Check pin configuration */ +#if !(defined(IBM4704_CLOCK_PORT) && \ + defined(IBM4704_CLOCK_PIN) && \ + defined(IBM4704_CLOCK_DDR) && \ + defined(IBM4704_CLOCK_BIT)) +# error "ibm4704 clock pin configuration is required in config.h" +#endif + +#if !(defined(IBM4704_DATA_PORT) && \ + defined(IBM4704_DATA_PIN) && \ + defined(IBM4704_DATA_DDR) && \ + defined(IBM4704_DATA_BIT)) +# error "ibm4704 data pin configuration is required in config.h" +#endif + + +/*-------------------------------------------------------------------- + * static functions + *------------------------------------------------------------------*/ +static inline void clock_lo(void) +{ + IBM4704_CLOCK_PORT &= ~(1<<IBM4704_CLOCK_BIT); + IBM4704_CLOCK_DDR |= (1<<IBM4704_CLOCK_BIT); +} +static inline void clock_hi(void) +{ + /* input with pull up */ + IBM4704_CLOCK_DDR &= ~(1<<IBM4704_CLOCK_BIT); + IBM4704_CLOCK_PORT |= (1<<IBM4704_CLOCK_BIT); +} +static inline bool clock_in(void) +{ + IBM4704_CLOCK_DDR &= ~(1<<IBM4704_CLOCK_BIT); + IBM4704_CLOCK_PORT |= (1<<IBM4704_CLOCK_BIT); + _delay_us(1); + return IBM4704_CLOCK_PIN&(1<<IBM4704_CLOCK_BIT); +} +static inline void data_lo(void) +{ + IBM4704_DATA_PORT &= ~(1<<IBM4704_DATA_BIT); + IBM4704_DATA_DDR |= (1<<IBM4704_DATA_BIT); +} +static inline void data_hi(void) +{ + /* input with pull up */ + IBM4704_DATA_DDR &= ~(1<<IBM4704_DATA_BIT); + IBM4704_DATA_PORT |= (1<<IBM4704_DATA_BIT); +} +static inline bool data_in(void) +{ + IBM4704_DATA_DDR &= ~(1<<IBM4704_DATA_BIT); + IBM4704_DATA_PORT |= (1<<IBM4704_DATA_BIT); + _delay_us(1); + return IBM4704_DATA_PIN&(1<<IBM4704_DATA_BIT); +} + +static inline uint16_t wait_clock_lo(uint16_t us) +{ + while (clock_in() && us) { asm(""); _delay_us(1); us--; } + return us; +} +static inline uint16_t wait_clock_hi(uint16_t us) +{ + while (!clock_in() && us) { asm(""); _delay_us(1); us--; } + return us; +} +static inline uint16_t wait_data_lo(uint16_t us) +{ + while (data_in() && us) { asm(""); _delay_us(1); us--; } + return us; +} +static inline uint16_t wait_data_hi(uint16_t us) +{ + while (!data_in() && us) { asm(""); _delay_us(1); us--; } + return us; +} + +/* idle state that device can send */ +static inline void idle(void) +{ + clock_hi(); + data_hi(); +} + +/* inhibit device to send + * keyboard checks Data line on start bit(Data:hi) and it stops sending if Data line is low. + */ +static inline void inhibit(void) +{ + clock_hi(); + data_lo(); +} + +#endif |