Add Initial files of 4704_usb
tmk
11 years ago
parent
cb3a547ebf
commit
ebe951a445
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# Target file name (without extension).
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TARGET = ibm4704_usb
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# Directory common source filess exist
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TOP_DIR = ../..
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# Directory keyboard dependent files exist
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TARGET_DIR = .
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# project specific files
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SRC = keymap_common.c \
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matrix.c \
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led.c \
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protocol/ibm4704.c
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ifdef KEYMAP
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SRC := keymap_$(KEYMAP).c $(SRC)
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else
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SRC := keymap_plain.c $(SRC)
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endif
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CONFIG_H = config.h
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# MCU name
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#MCU = at90usb1287
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MCU = atmega32u4
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# Processor frequency.
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# This will define a symbol, F_CPU, in all source code files equal to the
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# processor frequency in Hz. You can then use this symbol in your source code to
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# calculate timings. Do NOT tack on a 'UL' at the end, this will be done
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# automatically to create a 32-bit value in your source code.
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#
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# This will be an integer division of F_USB below, as it is sourced by
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# F_USB after it has run through any CPU prescalers. Note that this value
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# does not *change* the processor frequency - it should merely be updated to
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# reflect the processor speed set externally so that the code can use accurate
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# software delays.
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F_CPU = 16000000
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#
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# LUFA specific
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#
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# Target architecture (see library "Board Types" documentation).
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ARCH = AVR8
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# Input clock frequency.
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# This will define a symbol, F_USB, in all source code files equal to the
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# input clock frequency (before any prescaling is performed) in Hz. This value may
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# differ from F_CPU if prescaling is used on the latter, and is required as the
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# raw input clock is fed directly to the PLL sections of the AVR for high speed
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# clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
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# at the end, this will be done automatically to create a 32-bit value in your
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# source code.
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#
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# If no clock division is performed on the input clock inside the AVR (via the
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# CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
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F_USB = $(F_CPU)
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# Interrupt driven control endpoint task(+60)
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OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
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# Boot Section Size in *bytes*
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# Teensy halfKay 512
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# Teensy++ halfKay 1024
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# Atmel DFU loader 4096
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# LUFA bootloader 4096
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# USBaspLoader 2048
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OPT_DEFS += -DBOOTLOADER_SIZE=4096
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# Build Options
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# comment out to disable the options.
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#
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#BOOTMAGIC_ENABLE = yes # Virtual DIP switch configuration(+1000)
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#MOUSEKEY_ENABLE = yes # Mouse keys(+4700)
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##EXTRAKEY_ENABLE = yes # Audio control and System control(+450)
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CONSOLE_ENABLE = yes # Console for debug(+400)
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COMMAND_ENABLE = yes # Commands for debug and configuration
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#NKRO_ENABLE = yes # USB Nkey Rollover - not yet supported in LUFA
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# Search Path
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VPATH += $(TARGET_DIR)
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VPATH += $(TOP_DIR)
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include $(TOP_DIR)/protocol.mk
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include $(TOP_DIR)/protocol/lufa.mk
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include $(TOP_DIR)/common.mk
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include $(TOP_DIR)/rules.mk
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@ -0,0 +1,31 @@
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IBM 4704 to USB keyboard converter
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=======----=======================
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This firmware converts IBM 4704 keyboard protocol to USB HID.
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Connect Wires
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-------------
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In case of Teensy2.0(ATMega32U4):
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1. Connect Vcc and GND.
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2. Connect Clock and Data line.
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- Clock is on PD1 and Data on PD2.
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3. Optionally you need pull-up register. 1KOhm is OK?
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To change pin configuration edit config.h.
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Build Firmware
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--------------
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Just run `make`:
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$ make
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To select keymap:
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$ make KEYMAP=[plain|...]
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Keymap
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------
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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.
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/*
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Copyright 2014 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef CONFIG_H
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#define CONFIG_H
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#include <avr/interrupt.h>
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#define VENDOR_ID 0xFEED
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#define PRODUCT_ID 0x4707
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#define DEVICE_VER 0x0001
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#define MANUFACTURER t.m.k.
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#define PRODUCT IBM 4704 keyboard converter
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#define DESCRIPTION convert IBM 4704 keyboard to USB
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/* matrix size */
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#define MATRIX_ROWS 16 // keycode bit3-6
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#define MATRIX_COLS 8 // keycode bit0-2
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/* key combination for command */
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#define IS_COMMAND() ( \
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keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \
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)
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/*
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* Busywait
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*/
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#define IBM4704_CLOCK_PORT PORTD
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#define IBM4704_CLOCK_PIN PIND
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#define IBM4704_CLOCK_DDR DDRD
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#define IBM4704_CLOCK_BIT 1
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#define IBM4704_DATA_PORT PORTD
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#define IBM4704_DATA_PIN PIND
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#define IBM4704_DATA_DDR DDRD
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#define IBM4704_DATA_BIT 2
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/*
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* Pin interrupt
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*/
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#ifdef IBM4704_USE_INT
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#define IBM4704_INT_INIT() do { \
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EICRA |= ((1<<ISC11) | \
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(0<<ISC10)); \
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} while (0)
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#define IBM4704_INT_ON() do { \
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EIMSK |= (1<<INT1); \
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} while (0)
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#define IBM4704_INT_OFF() do { \
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EIMSK &= ~(1<<INT1); \
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} while (0)
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#define IBM4704_INT_VECT INT1_vect
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#endif
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#endif
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@ -0,0 +1,30 @@
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/*
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Copyright 2011,2012,2013 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "keymap_common.h"
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/* translates key to keycode */
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uint8_t keymap_key_to_keycode(uint8_t layer, key_t key)
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{
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return pgm_read_byte(&keymaps[(layer)][(key.row)][(key.col)]);
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}
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/* translates Fn keycode to action */
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action_t keymap_fn_to_action(uint8_t keycode)
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{
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return (action_t){ .code = pgm_read_word(&fn_actions[FN_INDEX(keycode)]) };
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}
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@ -0,0 +1,73 @@
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/*
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Copyright 2011,2012,2013 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef KEYMAP_COMMON_H
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#define KEYMAP_COMMON_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/pgmspace.h>
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#include "keycode.h"
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#include "action.h"
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#include "action_macro.h"
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#include "report.h"
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#include "print.h"
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#include "debug.h"
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#include "keymap.h"
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// 32*8(256) byte array which converts PS/2 code into USB code
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extern const uint8_t keymaps[][MATRIX_ROWS][MATRIX_COLS];
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extern const uint16_t fn_actions[];
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/* Original keys */
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#define KEYMAP( \
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K00,K18,K19,K1A,K10,K11,K12,K08,K09,K0A,K0F,K1F,K0D,K0C,K0E, \
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K04,K05,K06,K13,K14,K15,K16,K17,K01,K02,K03,K1B,K1C,K1D, \
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K20,K21,K22,K23,K24,K25,K26,K27,K28,K29,K2A,K2B,K2C,K2D, \
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K30,K3E,K32,K33,K34,K35,K36,K37,K38,K39,K3A,K3B,K3D, \
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K31,K41,K3F, K40, K42,K2F \
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) { \
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{ KC_##K00, KC_##K01, KC_##K02, KC_##K03, KC_##K04, KC_##K05, KC_##K06, KC_NO }, \
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{ KC_##K08, KC_##K09, KC_##K0A, KC_NO, KC_##K0C, KC_##K0D, KC_##K0E, KC_##K0F }, \
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{ KC_##K10, KC_##K11, KC_##K12, KC_##K13, KC_##K14, KC_##K15, KC_##K16, KC_##K17 }, \
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{ KC_##K18, KC_##K19, KC_##K1A, KC_##K1B, KC_##K1C, KC_##K1D, KC_NO, KC_##K1F }, \
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{ KC_##K20, KC_##K21, KC_##K22, KC_##K23, KC_##K24, KC_##K25, KC_##K26, KC_##K27 }, \
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{ KC_##K28, KC_##K29, KC_##K2A, KC_##K2B, KC_##K2C, KC_##K2D, KC_NO, KC_##K2F }, \
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{ KC_##K30, KC_##K31, KC_##K32, KC_##K33, KC_##K34, KC_##K35, KC_##K36, KC_##K37 }, \
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{ KC_##K38, KC_##K39, KC_##K3A, KC_##K3B, KC_NO, KC_##K3D, KC_##K3E, KC_##K3F }, \
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{ KC_##K40, KC_##K41, KC_##K42, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \
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{ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \
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{ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \
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{ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \
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{ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \
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{ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \
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{ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \
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{ KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO }, \
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}
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#endif
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/*
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{ K48, K49, K4A, K4B, K4C, K4D, K4E, K4F }, \
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{ K50, K51, K52, K53, K54, K55, K56, K57 }, \
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{ K58, K59, K5A, K5B, K5C, K5D, K5E, K5F }, \
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{ K60, K61, K62, K63, K64, K65, K66, K67 }, \
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{ K68, K69, K6A, K6B, K6C, K6D, K6E, K6F }, \
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{ K70, K71, K72, K73, K74, K75, K76, K77 }, \
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{ K78, K79, K7A, K7B, K7C, K7D, K7E, K7F }, \
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*/
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@ -0,0 +1,28 @@
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#include "keymap_common.h"
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const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
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/* 0: default
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* ,-----------------------------------------------------------.
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* | `| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|???|BS |
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* |-----------------------------------------------------------|
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* |Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| \|
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* |-----------------------------------------------------------|
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* |Ctrl | A| S| D| F| G| H| J| K| L| ;| '|???|Ret |
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* |-----------------------------------------------------------|
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* |Shif|???| Z| X| C| V| B| N| M| ,| ,| /|???|Shift |
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* |-----------------------------------------------------------|
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* |Ctrl |Gui|Alt | Space |Alt |Gui|Ctrl |
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* `-----------------------------------------------------------'
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*/
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KEYMAP(
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ESC, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, MINS,EQL, BSLS,GRV, \
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TAB, Q, W, E, R, T, Y, U, I, O, P, LBRC,RBRC,BSPC, \
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LCTL,A, S, D, F, G, H, J, K, L, SCLN,QUOT,NO, ENT, \
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LSFT,NO, Z, X, C, V, B, N, M, COMM,DOT, SLSH, RSFT, \
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LCTL,LGUI,LALT, SPC, RGUI,RCTL \
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),
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};
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const uint16_t PROGMEM fn_actions[] = {
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};
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@ -0,0 +1,24 @@
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/*
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Copyright 2011 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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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.
|
||||
|
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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
|
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GNU General Public License for more details.
|
||||
|
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You should have received a copy of the GNU General Public License
|
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "stdint.h"
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#include "led.h"
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void led_set(uint8_t usb_led)
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{
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}
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@ -0,0 +1,179 @@
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/*
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Copyright 2014 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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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.
|
||||
|
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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.
|
||||
|
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You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "action.h"
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "ibm4704.h"
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#include "matrix.h"
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static void matrix_make(uint8_t code);
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static void matrix_break(uint8_t code);
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static void matrix_clear(void);
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/*
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* Matrix Array usage:
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* IBM 4704 scan codes are assigned into 128(16x8)-cell matrix.
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*
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* 8bit wide
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* +---------+
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* 0| |
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* :| XX | 00-7F
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* f| |
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* +---------+
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*
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* Exceptions:
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*/
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static uint8_t matrix[MATRIX_ROWS];
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// scan code bits 7654 3210
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// R:row/C:column -RRR RCCC
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#define ROW(code) ((code>>3)&0x0f)
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#define COL(code) (code&0x07)
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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static void enable_break(void)
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{
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uint8_t ret;
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for (uint8_t code = 0; code < 0x80; code++) {
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while (ibm4704_send(0x80|code) != 0) {
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print("z");
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}
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_delay_ms(1);
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ret = ibm4704_recv();
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if (ret!=0xFF) {
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xprintf("%0X: %0X ", code, ret);
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}
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}
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_delay_us(100);
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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;
|
||||
}
|
||||
@ -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;
|
||||
}
|
||||
@ -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
|
||||
Loading…
Reference in New Issue