Keyboard: Migrate Quefrency to use split common files (#3642)
Danny
6 years ago
committed by
Drashna Jaelre
parent
ad2bb529c7
commit
89838d0939
@ -1,162 +0,0 @@
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#include <util/twi.h>
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#include <avr/io.h>
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#include <stdlib.h>
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#include <avr/interrupt.h>
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#include <util/twi.h>
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#include <stdbool.h>
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#include "i2c.h"
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#ifdef USE_I2C
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// Limits the amount of we wait for any one i2c transaction.
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// Since were running SCL line 100kHz (=> 10μs/bit), and each transactions is
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// 9 bits, a single transaction will take around 90μs to complete.
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//
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// (F_CPU/SCL_CLOCK) => # of μC cycles to transfer a bit
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// poll loop takes at least 8 clock cycles to execute
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#define I2C_LOOP_TIMEOUT (9+1)*(F_CPU/SCL_CLOCK)/8
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#define BUFFER_POS_INC() (slave_buffer_pos = (slave_buffer_pos+1)%SLAVE_BUFFER_SIZE)
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volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
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static volatile uint8_t slave_buffer_pos;
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static volatile bool slave_has_register_set = false;
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// Wait for an i2c operation to finish
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inline static
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void i2c_delay(void) {
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uint16_t lim = 0;
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while(!(TWCR & (1<<TWINT)) && lim < I2C_LOOP_TIMEOUT)
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lim++;
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// easier way, but will wait slightly longer
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// _delay_us(100);
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}
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// Setup twi to run at 100kHz
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void i2c_master_init(void) {
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// no prescaler
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TWSR = 0;
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// Set TWI clock frequency to SCL_CLOCK. Need TWBR>10.
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// Check datasheets for more info.
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TWBR = ((F_CPU/SCL_CLOCK)-16)/2;
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}
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// Start a transaction with the given i2c slave address. The direction of the
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// transfer is set with I2C_READ and I2C_WRITE.
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// returns: 0 => success
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// 1 => error
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uint8_t i2c_master_start(uint8_t address) {
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TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTA);
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i2c_delay();
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// check that we started successfully
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if ( (TW_STATUS != TW_START) && (TW_STATUS != TW_REP_START))
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return 1;
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TWDR = address;
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TWCR = (1<<TWINT) | (1<<TWEN);
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i2c_delay();
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if ( (TW_STATUS != TW_MT_SLA_ACK) && (TW_STATUS != TW_MR_SLA_ACK) )
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return 1; // slave did not acknowledge
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else
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return 0; // success
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}
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// Finish the i2c transaction.
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void i2c_master_stop(void) {
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TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
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uint16_t lim = 0;
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while(!(TWCR & (1<<TWSTO)) && lim < I2C_LOOP_TIMEOUT)
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lim++;
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}
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// Write one byte to the i2c slave.
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// returns 0 => slave ACK
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// 1 => slave NACK
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uint8_t i2c_master_write(uint8_t data) {
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TWDR = data;
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TWCR = (1<<TWINT) | (1<<TWEN);
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i2c_delay();
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// check if the slave acknowledged us
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return (TW_STATUS == TW_MT_DATA_ACK) ? 0 : 1;
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}
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// Read one byte from the i2c slave. If ack=1 the slave is acknowledged,
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// if ack=0 the acknowledge bit is not set.
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// returns: byte read from i2c device
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uint8_t i2c_master_read(int ack) {
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TWCR = (1<<TWINT) | (1<<TWEN) | (ack<<TWEA);
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i2c_delay();
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return TWDR;
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}
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void i2c_reset_state(void) {
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TWCR = 0;
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}
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void i2c_slave_init(uint8_t address) {
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TWAR = address << 0; // slave i2c address
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// TWEN - twi enable
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// TWEA - enable address acknowledgement
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// TWINT - twi interrupt flag
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// TWIE - enable the twi interrupt
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TWCR = (1<<TWIE) | (1<<TWEA) | (1<<TWINT) | (1<<TWEN);
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}
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ISR(TWI_vect);
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ISR(TWI_vect) {
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uint8_t ack = 1;
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switch(TW_STATUS) {
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case TW_SR_SLA_ACK:
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// this device has been addressed as a slave receiver
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slave_has_register_set = false;
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break;
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case TW_SR_DATA_ACK:
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// this device has received data as a slave receiver
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// The first byte that we receive in this transaction sets the location
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// of the read/write location of the slaves memory that it exposes over
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// i2c. After that, bytes will be written at slave_buffer_pos, incrementing
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// slave_buffer_pos after each write.
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if(!slave_has_register_set) {
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slave_buffer_pos = TWDR;
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// don't acknowledge the master if this memory loctaion is out of bounds
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if ( slave_buffer_pos >= SLAVE_BUFFER_SIZE ) {
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ack = 0;
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slave_buffer_pos = 0;
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}
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slave_has_register_set = true;
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} else {
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i2c_slave_buffer[slave_buffer_pos] = TWDR;
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BUFFER_POS_INC();
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}
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break;
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case TW_ST_SLA_ACK:
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case TW_ST_DATA_ACK:
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// master has addressed this device as a slave transmitter and is
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// requesting data.
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TWDR = i2c_slave_buffer[slave_buffer_pos];
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BUFFER_POS_INC();
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break;
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case TW_BUS_ERROR: // something went wrong, reset twi state
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TWCR = 0;
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default:
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break;
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}
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// Reset everything, so we are ready for the next TWI interrupt
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TWCR |= (1<<TWIE) | (1<<TWINT) | (ack<<TWEA) | (1<<TWEN);
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}
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#endif
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@ -1,49 +0,0 @@
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#ifndef I2C_H
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#define I2C_H
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#include <stdint.h>
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#ifndef F_CPU
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#define F_CPU 16000000UL
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#endif
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#define I2C_READ 1
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#define I2C_WRITE 0
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#define I2C_ACK 1
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#define I2C_NACK 0
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#define SLAVE_BUFFER_SIZE 0x10
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// i2c SCL clock frequency
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#define SCL_CLOCK 400000L
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extern volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE];
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void i2c_master_init(void);
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uint8_t i2c_master_start(uint8_t address);
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void i2c_master_stop(void);
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uint8_t i2c_master_write(uint8_t data);
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uint8_t i2c_master_read(int);
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void i2c_reset_state(void);
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void i2c_slave_init(uint8_t address);
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static inline unsigned char i2c_start_read(unsigned char addr) {
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return i2c_master_start((addr << 1) | I2C_READ);
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}
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static inline unsigned char i2c_start_write(unsigned char addr) {
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return i2c_master_start((addr << 1) | I2C_WRITE);
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}
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// from SSD1306 scrips
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extern unsigned char i2c_rep_start(unsigned char addr);
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extern void i2c_start_wait(unsigned char addr);
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extern unsigned char i2c_readAck(void);
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extern unsigned char i2c_readNak(void);
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extern unsigned char i2c_read(unsigned char ack);
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#define i2c_read(ack) (ack) ? i2c_readAck() : i2c_readNak();
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#endif
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@ -1,467 +0,0 @@
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/*
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Copyright 2012 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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/*
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* scan matrix
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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 "wait.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 "matrix.h"
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#include "split_util.h"
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#include "pro_micro.h"
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#include "config.h"
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#include "timer.h"
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#include "backlight.h"
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#ifdef USE_I2C
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# include "i2c.h"
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#else // USE_SERIAL
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# include "serial.h"
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#endif
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#ifndef DEBOUNCING_DELAY
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# define DEBOUNCING_DELAY 5
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#endif
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#if (DEBOUNCING_DELAY > 0)
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static uint16_t debouncing_time;
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static bool debouncing = false;
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#endif
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#if (MATRIX_COLS <= 8)
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# define print_matrix_header() print("\nr/c 01234567\n")
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# define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
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# define matrix_bitpop(i) bitpop(matrix[i])
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# define ROW_SHIFTER ((uint8_t)1)
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#else
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# error "Currently only supports 8 COLS"
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#endif
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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#define ERROR_DISCONNECT_COUNT 5
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#define SERIAL_LED_ADDR 0x00
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#define ROWS_PER_HAND (MATRIX_ROWS/2)
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static uint8_t error_count = 0;
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static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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#if (DIODE_DIRECTION == COL2ROW)
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static void init_cols(void);
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static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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static void unselect_row(uint8_t row);
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#elif (DIODE_DIRECTION == ROW2COL)
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static void init_rows(void);
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static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
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static void unselect_cols(void);
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static void unselect_col(uint8_t col);
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static void select_col(uint8_t col);
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#endif
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__attribute__ ((weak))
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void matrix_init_kb(void) {
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matrix_init_user();
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}
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__attribute__ ((weak))
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void matrix_scan_kb(void) {
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matrix_scan_user();
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}
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__attribute__ ((weak))
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void matrix_init_user(void) {
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}
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__attribute__ ((weak))
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void matrix_scan_user(void) {
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}
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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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void matrix_init(void)
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{
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debug_enable = true;
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debug_matrix = true;
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debug_mouse = true;
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// initialize row and col
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unselect_rows();
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init_cols();
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TX_RX_LED_INIT;
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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matrix[i] = 0;
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matrix_debouncing[i] = 0;
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}
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matrix_init_quantum();
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}
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uint8_t _matrix_scan(void)
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{
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int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
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#if (DIODE_DIRECTION == COL2ROW)
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// Set row, read cols
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for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
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# if (DEBOUNCING_DELAY > 0)
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bool matrix_changed = read_cols_on_row(matrix_debouncing+offset, current_row);
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if (matrix_changed) {
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debouncing = true;
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debouncing_time = timer_read();
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}
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# else
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read_cols_on_row(matrix+offset, current_row);
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# endif
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}
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#elif (DIODE_DIRECTION == ROW2COL)
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// Set col, read rows
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for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
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# if (DEBOUNCING_DELAY > 0)
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bool matrix_changed = read_rows_on_col(matrix_debouncing+offset, current_col);
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if (matrix_changed) {
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debouncing = true;
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debouncing_time = timer_read();
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}
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# else
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read_rows_on_col(matrix+offset, current_col);
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# endif
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}
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#endif
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# if (DEBOUNCING_DELAY > 0)
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if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
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for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
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matrix[i+offset] = matrix_debouncing[i+offset];
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}
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debouncing = false;
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}
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# endif
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return 1;
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}
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#ifdef USE_I2C
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// Get rows from other half over i2c
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int i2c_transaction(void) {
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int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
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int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
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if (err) goto i2c_error;
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// start of matrix stored at 0x00
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err = i2c_master_write(0x00);
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if (err) goto i2c_error;
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// Start read
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err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
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if (err) goto i2c_error;
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if (!err) {
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int i;
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for (i = 0; i < ROWS_PER_HAND-1; ++i) {
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matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
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}
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matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
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i2c_master_stop();
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} else {
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i2c_error: // the cable is disconnceted, or something else went wrong
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i2c_reset_state();
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return err;
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}
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return 0;
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}
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#else // USE_SERIAL
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int serial_transaction(void) {
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int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
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if (serial_update_buffers()) {
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return 1;
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}
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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matrix[slaveOffset+i] = serial_slave_buffer[i];
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}
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#ifdef BACKLIGHT_ENABLE
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// Write backlight level for slave to read
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serial_master_buffer[SERIAL_LED_ADDR] = get_backlight_level();
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#endif
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return 0;
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}
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#endif
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uint8_t matrix_scan(void)
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{
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uint8_t ret = _matrix_scan();
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#ifdef USE_I2C
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if( i2c_transaction() ) {
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#else // USE_SERIAL
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if( serial_transaction() ) {
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#endif
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// turn on the indicator led when halves are disconnected
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TXLED1;
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error_count++;
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if (error_count > ERROR_DISCONNECT_COUNT) {
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// reset other half if disconnected
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int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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matrix[slaveOffset+i] = 0;
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}
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}
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} else {
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// turn off the indicator led on no error
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TXLED0;
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error_count = 0;
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}
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matrix_scan_quantum();
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return ret;
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}
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void matrix_slave_scan(void) {
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_matrix_scan();
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int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
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#ifdef USE_I2C
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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i2c_slave_buffer[i] = matrix[offset+i];
|
||||
}
|
||||
#else // USE_SERIAL
|
||||
for (int i = 0; i < ROWS_PER_HAND; ++i) {
|
||||
serial_slave_buffer[i] = matrix[offset+i];
|
||||
}
|
||||
|
||||
#ifdef BACKLIGHT_ENABLE
|
||||
// Read backlight level sent from master and update level on slave
|
||||
backlight_set(serial_master_buffer[SERIAL_LED_ADDR]);
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
bool matrix_is_modified(void)
|
||||
{
|
||||
if (debouncing) return false;
|
||||
return true;
|
||||
}
|
||||
|
||||
inline
|
||||
bool matrix_is_on(uint8_t row, uint8_t col)
|
||||
{
|
||||
return (matrix[row] & ((matrix_row_t)1<<col));
|
||||
}
|
||||
|
||||
inline
|
||||
matrix_row_t matrix_get_row(uint8_t row)
|
||||
{
|
||||
return matrix[row];
|
||||
}
|
||||
|
||||
void matrix_print(void)
|
||||
{
|
||||
print("\nr/c 0123456789ABCDEF\n");
|
||||
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
|
||||
phex(row); print(": ");
|
||||
pbin_reverse16(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 += bitpop16(matrix[i]);
|
||||
}
|
||||
return count;
|
||||
}
|
||||
|
||||
#if (DIODE_DIRECTION == COL2ROW)
|
||||
|
||||
static void init_cols(void)
|
||||
{
|
||||
for(uint8_t x = 0; x < MATRIX_COLS; x++) {
|
||||
uint8_t pin = col_pins[x];
|
||||
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
|
||||
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
||||
}
|
||||
}
|
||||
|
||||
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
|
||||
{
|
||||
// Store last value of row prior to reading
|
||||
matrix_row_t last_row_value = current_matrix[current_row];
|
||||
|
||||
// Clear data in matrix row
|
||||
current_matrix[current_row] = 0;
|
||||
|
||||
// Select row and wait for row selecton to stabilize
|
||||
select_row(current_row);
|
||||
wait_us(30);
|
||||
|
||||
// For each col...
|
||||
for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
|
||||
|
||||
// Select the col pin to read (active low)
|
||||
uint8_t pin = col_pins[col_index];
|
||||
uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
|
||||
|
||||
// Populate the matrix row with the state of the col pin
|
||||
current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
|
||||
}
|
||||
|
||||
// Unselect row
|
||||
unselect_row(current_row);
|
||||
|
||||
return (last_row_value != current_matrix[current_row]);
|
||||
}
|
||||
|
||||
static void select_row(uint8_t row)
|
||||
{
|
||||
uint8_t pin = row_pins[row];
|
||||
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
|
||||
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
|
||||
}
|
||||
|
||||
static void unselect_row(uint8_t row)
|
||||
{
|
||||
uint8_t pin = row_pins[row];
|
||||
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
|
||||
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
||||
}
|
||||
|
||||
static void unselect_rows(void)
|
||||
{
|
||||
for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
|
||||
uint8_t pin = row_pins[x];
|
||||
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
|
||||
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
||||
}
|
||||
}
|
||||
|
||||
#elif (DIODE_DIRECTION == ROW2COL)
|
||||
|
||||
static void init_rows(void)
|
||||
{
|
||||
for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
|
||||
uint8_t pin = row_pins[x];
|
||||
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
|
||||
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
||||
}
|
||||
}
|
||||
|
||||
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
|
||||
{
|
||||
bool matrix_changed = false;
|
||||
|
||||
// Select col and wait for col selecton to stabilize
|
||||
select_col(current_col);
|
||||
wait_us(30);
|
||||
|
||||
// For each row...
|
||||
for(uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++)
|
||||
{
|
||||
|
||||
// Store last value of row prior to reading
|
||||
matrix_row_t last_row_value = current_matrix[row_index];
|
||||
|
||||
// Check row pin state
|
||||
if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
|
||||
{
|
||||
// Pin LO, set col bit
|
||||
current_matrix[row_index] |= (ROW_SHIFTER << current_col);
|
||||
}
|
||||
else
|
||||
{
|
||||
// Pin HI, clear col bit
|
||||
current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
|
||||
}
|
||||
|
||||
// Determine if the matrix changed state
|
||||
if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
|
||||
{
|
||||
matrix_changed = true;
|
||||
}
|
||||
}
|
||||
|
||||
// Unselect col
|
||||
unselect_col(current_col);
|
||||
|
||||
return matrix_changed;
|
||||
}
|
||||
|
||||
static void select_col(uint8_t col)
|
||||
{
|
||||
uint8_t pin = col_pins[col];
|
||||
_SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
|
||||
_SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
|
||||
}
|
||||
|
||||
static void unselect_col(uint8_t col)
|
||||
{
|
||||
uint8_t pin = col_pins[col];
|
||||
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
|
||||
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
||||
}
|
||||
|
||||
static void unselect_cols(void)
|
||||
{
|
||||
for(uint8_t x = 0; x < MATRIX_COLS; x++) {
|
||||
uint8_t pin = col_pins[x];
|
||||
_SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
|
||||
_SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
@ -1,228 +0,0 @@
|
||||
/*
|
||||
* WARNING: be careful changing this code, it is very timing dependent
|
||||
*/
|
||||
|
||||
#ifndef F_CPU
|
||||
#define F_CPU 16000000
|
||||
#endif
|
||||
|
||||
#include <avr/io.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include <util/delay.h>
|
||||
#include <stdbool.h>
|
||||
#include "serial.h"
|
||||
|
||||
#ifndef USE_I2C
|
||||
|
||||
// Serial pulse period in microseconds. Its probably a bad idea to lower this
|
||||
// value.
|
||||
#define SERIAL_DELAY 24
|
||||
|
||||
uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
|
||||
uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
|
||||
|
||||
#define SLAVE_DATA_CORRUPT (1<<0)
|
||||
volatile uint8_t status = 0;
|
||||
|
||||
inline static
|
||||
void serial_delay(void) {
|
||||
_delay_us(SERIAL_DELAY);
|
||||
}
|
||||
|
||||
inline static
|
||||
void serial_output(void) {
|
||||
SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
|
||||
}
|
||||
|
||||
// make the serial pin an input with pull-up resistor
|
||||
inline static
|
||||
void serial_input(void) {
|
||||
SERIAL_PIN_DDR &= ~SERIAL_PIN_MASK;
|
||||
SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
|
||||
}
|
||||
|
||||
inline static
|
||||
uint8_t serial_read_pin(void) {
|
||||
return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
|
||||
}
|
||||
|
||||
inline static
|
||||
void serial_low(void) {
|
||||
SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
|
||||
}
|
||||
|
||||
inline static
|
||||
void serial_high(void) {
|
||||
SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
|
||||
}
|
||||
|
||||
void serial_master_init(void) {
|
||||
serial_output();
|
||||
serial_high();
|
||||
}
|
||||
|
||||
void serial_slave_init(void) {
|
||||
serial_input();
|
||||
|
||||
// Enable INT0
|
||||
EIMSK |= _BV(INT0);
|
||||
// Trigger on falling edge of INT0
|
||||
EICRA &= ~(_BV(ISC00) | _BV(ISC01));
|
||||
}
|
||||
|
||||
// Used by the master to synchronize timing with the slave.
|
||||
static
|
||||
void sync_recv(void) {
|
||||
serial_input();
|
||||
// This shouldn't hang if the slave disconnects because the
|
||||
// serial line will float to high if the slave does disconnect.
|
||||
while (!serial_read_pin());
|
||||
serial_delay();
|
||||
}
|
||||
|
||||
// Used by the slave to send a synchronization signal to the master.
|
||||
static
|
||||
void sync_send(void) {
|
||||
serial_output();
|
||||
|
||||
serial_low();
|
||||
serial_delay();
|
||||
|
||||
serial_high();
|
||||
}
|
||||
|
||||
// Reads a byte from the serial line
|
||||
static
|
||||
uint8_t serial_read_byte(void) {
|
||||
uint8_t byte = 0;
|
||||
serial_input();
|
||||
for ( uint8_t i = 0; i < 8; ++i) {
|
||||
byte = (byte << 1) | serial_read_pin();
|
||||
serial_delay();
|
||||
_delay_us(1);
|
||||
}
|
||||
|
||||
return byte;
|
||||
}
|
||||
|
||||
// Sends a byte with MSB ordering
|
||||
static
|
||||
void serial_write_byte(uint8_t data) {
|
||||
uint8_t b = 8;
|
||||
serial_output();
|
||||
while( b-- ) {
|
||||
if(data & (1 << b)) {
|
||||
serial_high();
|
||||
} else {
|
||||
serial_low();
|
||||
}
|
||||
serial_delay();
|
||||
}
|
||||
}
|
||||
|
||||
// interrupt handle to be used by the slave device
|
||||
ISR(SERIAL_PIN_INTERRUPT) {
|
||||
sync_send();
|
||||
|
||||
uint8_t checksum = 0;
|
||||
for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
|
||||
serial_write_byte(serial_slave_buffer[i]);
|
||||
sync_send();
|
||||
checksum += serial_slave_buffer[i];
|
||||
}
|
||||
serial_write_byte(checksum);
|
||||
sync_send();
|
||||
|
||||
// wait for the sync to finish sending
|
||||
serial_delay();
|
||||
|
||||
// read the middle of pulses
|
||||
_delay_us(SERIAL_DELAY/2);
|
||||
|
||||
uint8_t checksum_computed = 0;
|
||||
for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
|
||||
serial_master_buffer[i] = serial_read_byte();
|
||||
sync_send();
|
||||
checksum_computed += serial_master_buffer[i];
|
||||
}
|
||||
uint8_t checksum_received = serial_read_byte();
|
||||
sync_send();
|
||||
|
||||
serial_input(); // end transaction
|
||||
|
||||
if ( checksum_computed != checksum_received ) {
|
||||
status |= SLAVE_DATA_CORRUPT;
|
||||
} else {
|
||||
status &= ~SLAVE_DATA_CORRUPT;
|
||||
}
|
||||
}
|
||||
|
||||
inline
|
||||
bool serial_slave_DATA_CORRUPT(void) {
|
||||
return status & SLAVE_DATA_CORRUPT;
|
||||
}
|
||||
|
||||
// Copies the serial_slave_buffer to the master and sends the
|
||||
// serial_master_buffer to the slave.
|
||||
//
|
||||
// Returns:
|
||||
// 0 => no error
|
||||
// 1 => slave did not respond
|
||||
int serial_update_buffers(void) {
|
||||
// this code is very time dependent, so we need to disable interrupts
|
||||
cli();
|
||||
|
||||
// signal to the slave that we want to start a transaction
|
||||
serial_output();
|
||||
serial_low();
|
||||
_delay_us(1);
|
||||
|
||||
// wait for the slaves response
|
||||
serial_input();
|
||||
serial_high();
|
||||
_delay_us(SERIAL_DELAY);
|
||||
|
||||
// check if the slave is present
|
||||
if (serial_read_pin()) {
|
||||
// slave failed to pull the line low, assume not present
|
||||
sei();
|
||||
return 1;
|
||||
}
|
||||
|
||||
// if the slave is present syncronize with it
|
||||
sync_recv();
|
||||
|
||||
uint8_t checksum_computed = 0;
|
||||
// receive data from the slave
|
||||
for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
|
||||
serial_slave_buffer[i] = serial_read_byte();
|
||||
sync_recv();
|
||||
checksum_computed += serial_slave_buffer[i];
|
||||
}
|
||||
uint8_t checksum_received = serial_read_byte();
|
||||
sync_recv();
|
||||
|
||||
if (checksum_computed != checksum_received) {
|
||||
sei();
|
||||
return 1;
|
||||
}
|
||||
|
||||
uint8_t checksum = 0;
|
||||
// send data to the slave
|
||||
for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
|
||||
serial_write_byte(serial_master_buffer[i]);
|
||||
sync_recv();
|
||||
checksum += serial_master_buffer[i];
|
||||
}
|
||||
serial_write_byte(checksum);
|
||||
sync_recv();
|
||||
|
||||
// always, release the line when not in use
|
||||
serial_output();
|
||||
serial_high();
|
||||
|
||||
sei();
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
@ -1,26 +0,0 @@
|
||||
#ifndef MY_SERIAL_H
|
||||
#define MY_SERIAL_H
|
||||
|
||||
#include "config.h"
|
||||
#include <stdbool.h>
|
||||
|
||||
/* TODO: some defines for interrupt setup */
|
||||
#define SERIAL_PIN_DDR DDRD
|
||||
#define SERIAL_PIN_PORT PORTD
|
||||
#define SERIAL_PIN_INPUT PIND
|
||||
#define SERIAL_PIN_MASK _BV(PD0)
|
||||
#define SERIAL_PIN_INTERRUPT INT0_vect
|
||||
|
||||
#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
|
||||
#define SERIAL_MASTER_BUFFER_LENGTH 1
|
||||
|
||||
// Buffers for master - slave communication
|
||||
extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
|
||||
extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
|
||||
|
||||
void serial_master_init(void);
|
||||
void serial_slave_init(void);
|
||||
int serial_update_buffers(void);
|
||||
bool serial_slave_data_corrupt(void);
|
||||
|
||||
#endif
|
||||
@ -1,80 +0,0 @@
|
||||
#include <avr/io.h>
|
||||
#include <avr/wdt.h>
|
||||
#include <avr/power.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include <util/delay.h>
|
||||
#include <avr/eeprom.h>
|
||||
#include "split_util.h"
|
||||
#include "matrix.h"
|
||||
#include "keyboard.h"
|
||||
#include "config.h"
|
||||
#include "timer.h"
|
||||
#include "pincontrol.h"
|
||||
|
||||
#ifdef USE_I2C
|
||||
# include "i2c.h"
|
||||
#else
|
||||
# include "serial.h"
|
||||
#endif
|
||||
|
||||
volatile bool isLeftHand = true;
|
||||
|
||||
static void setup_handedness(void) {
|
||||
// Test D2 pin for handedness, if D2 is grounded, it's the right hand
|
||||
pinMode(D2, PinDirectionInput);
|
||||
isLeftHand = digitalRead(D2);
|
||||
}
|
||||
|
||||
static void keyboard_master_setup(void) {
|
||||
#ifdef USE_I2C
|
||||
i2c_master_init();
|
||||
#ifdef SSD1306OLED
|
||||
matrix_master_OLED_init();
|
||||
#endif
|
||||
#else
|
||||
serial_master_init();
|
||||
#endif
|
||||
}
|
||||
|
||||
static void keyboard_slave_setup(void) {
|
||||
timer_init();
|
||||
#ifdef USE_I2C
|
||||
i2c_slave_init(SLAVE_I2C_ADDRESS);
|
||||
#else
|
||||
serial_slave_init();
|
||||
#endif
|
||||
}
|
||||
|
||||
bool has_usb(void) {
|
||||
USBCON |= (1 << OTGPADE); //enables VBUS pad
|
||||
_delay_us(5);
|
||||
return (USBSTA & (1<<VBUS)); //checks state of VBUS
|
||||
}
|
||||
|
||||
void split_keyboard_setup(void) {
|
||||
setup_handedness();
|
||||
|
||||
if (has_usb()) {
|
||||
keyboard_master_setup();
|
||||
} else {
|
||||
keyboard_slave_setup();
|
||||
}
|
||||
sei();
|
||||
}
|
||||
|
||||
void keyboard_slave_loop(void) {
|
||||
matrix_init();
|
||||
|
||||
while (1) {
|
||||
matrix_slave_scan();
|
||||
}
|
||||
}
|
||||
|
||||
// this code runs before the usb and keyboard is initialized
|
||||
void matrix_setup(void) {
|
||||
split_keyboard_setup();
|
||||
|
||||
if (!has_usb()) {
|
||||
keyboard_slave_loop();
|
||||
}
|
||||
}
|
||||
@ -1,20 +0,0 @@
|
||||
#ifndef SPLIT_KEYBOARD_UTIL_H
|
||||
#define SPLIT_KEYBOARD_UTIL_H
|
||||
|
||||
#include <stdbool.h>
|
||||
#include "eeconfig.h"
|
||||
|
||||
#define SLAVE_I2C_ADDRESS 0x32
|
||||
|
||||
extern volatile bool isLeftHand;
|
||||
|
||||
// slave version of matix scan, defined in matrix.c
|
||||
void matrix_slave_scan(void);
|
||||
|
||||
void split_keyboard_setup(void);
|
||||
bool has_usb(void);
|
||||
void keyboard_slave_loop(void);
|
||||
|
||||
void matrix_master_OLED_init (void);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in new issue