Convert BFO9000 to Split Keyboard code (#5568)
This commit is contained in:
Drashna Jaelre
committed by
MechMerlin
MechMerlin
parent
da9bb59055
commit
f8d365a478
@ -1,16 +1,7 @@
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#ifndef BFO9000_H
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#define BFO9000_H
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#pragma once
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#include "quantum.h"
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#ifdef USE_I2C
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#include <stddef.h>
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#ifdef __AVR__
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#endif
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#endif
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#define LAYOUT( \
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L00, L01, L02, L03, L04, L05, L06, L07, L08, R00, R01, R02, R03, R04, R05, R06, R07, R08, \
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L10, L11, L12, L13, L14, L15, L16, L17, L18, R10, R11, R12, R13, R14, R15, R16, R17, R18, \
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@ -33,5 +24,3 @@
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{ R40, R41, R42, R43, R44, R45, R46, R47, R48 }, \
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{ R50, R51, R52, R53, R54, R55, R56, R57, R58 } \
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}
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#endif
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@ -45,6 +45,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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/* Locking resynchronize hack */
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#define LOCKING_RESYNC_ENABLE
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/* serial.c configuration for split keyboard */
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#define SOFT_SERIAL_PIN D0
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/* ws2812 RGB LED */
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#define RGB_DI_PIN B4
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#define RGBLED_NUM 20 // Number of LEDs
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@ -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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File diff suppressed because it is too large
Load Diff
@ -1,8 +1,3 @@
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SRC += matrix.c \
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i2c.c \
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split_util.c \
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serial.c
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# MCU name
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#MCU = at90usb1287
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MCU = atmega32u4
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@ -41,7 +36,7 @@ F_USB = $(F_CPU)
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# Bootloader
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# This definition is optional, and if your keyboard supports multiple bootloaders of
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# different sizes, comment this out, and the correct address will be loaded
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# different sizes, comment this out, and the correct address will be loaded
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# automatically (+60). See bootloader.mk for all options.
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BOOTLOADER = caterina
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@ -63,8 +58,8 @@ MIDI_ENABLE = no # MIDI controls
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AUDIO_ENABLE = no # Audio output on port C6
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UNICODE_ENABLE = no # Unicode
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BLUETOOTH_ENABLE = no # Enable Bluetooth with the Adafruit EZ-Key HID
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RGBLIGHT_ENABLE = no # Enable WS2812 RGB underlight.
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RGBLIGHT_ENABLE = no # Enable WS2812 RGB underlight.
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# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
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SLEEP_LED_ENABLE = no # Breathing sleep LED during USB suspend
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CUSTOM_MATRIX = yes
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SPLIT_KEYBOARD = yes
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@ -1,230 +0,0 @@
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/*
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* WARNING: be careful changing this code, it is very timing dependent
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*/
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#ifndef F_CPU
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#define F_CPU 16000000
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#endif
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#include <stdbool.h>
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#include "serial.h"
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#ifndef USE_I2C
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// Serial pulse period in microseconds. Its probably a bad idea to lower this
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// value.
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#define SERIAL_DELAY 24
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matrix_row_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
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matrix_row_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
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#define ROW_MASK (((matrix_row_t)0-1)>>(8*sizeof(matrix_row_t)-MATRIX_COLS))
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#define SLAVE_DATA_CORRUPT (1<<0)
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volatile uint8_t status = 0;
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inline static
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void serial_delay(void) {
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_delay_us(SERIAL_DELAY);
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}
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inline static
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void serial_output(void) {
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SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
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}
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// make the serial pin an input with pull-up resistor
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inline static
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void serial_input(void) {
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SERIAL_PIN_DDR &= ~SERIAL_PIN_MASK;
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SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
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}
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inline static
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matrix_row_t serial_read_pin(void) {
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return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
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}
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inline static
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void serial_low(void) {
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SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
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}
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inline static
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void serial_high(void) {
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SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
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}
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void serial_master_init(void) {
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serial_output();
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serial_high();
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}
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void serial_slave_init(void) {
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serial_input();
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// Enable INT0
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EIMSK |= _BV(INT0);
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// Trigger on falling edge of INT0
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EICRA &= ~(_BV(ISC00) | _BV(ISC01));
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}
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// Used by the master to synchronize timing with the slave.
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static
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void sync_recv(void) {
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serial_input();
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// This shouldn't hang if the slave disconnects because the
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// serial line will float to high if the slave does disconnect.
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while (!serial_read_pin());
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serial_delay();
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}
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// Used by the slave to send a synchronization signal to the master.
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static
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void sync_send(void) {
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serial_output();
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serial_low();
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serial_delay();
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serial_high();
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}
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// Reads a byte from the serial line
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static
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matrix_row_t serial_read_byte(void) {
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matrix_row_t byte = 0;
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serial_input();
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for ( uint8_t i = 0; i < MATRIX_COLS; ++i) {
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byte = (byte << 1) | serial_read_pin();
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serial_delay();
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_delay_us(1);
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}
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return byte;
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}
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// Sends a byte with MSB ordering
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static
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void serial_write_byte(matrix_row_t data) {
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matrix_row_t b = MATRIX_COLS;
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serial_output();
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while( b-- ) {
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if(data & (1UL << b)) {
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serial_high();
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} else {
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serial_low();
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}
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serial_delay();
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}
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}
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// interrupt handle to be used by the slave device
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ISR(SERIAL_PIN_INTERRUPT) {
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sync_send();
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matrix_row_t checksum = 0;
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for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
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serial_write_byte(serial_slave_buffer[i]);
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sync_send();
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checksum += ROW_MASK & serial_slave_buffer[i];
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}
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serial_write_byte(checksum);
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sync_send();
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// wait for the sync to finish sending
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serial_delay();
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// read the middle of pulses
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_delay_us(SERIAL_DELAY/2);
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matrix_row_t checksum_computed = 0;
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for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
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serial_master_buffer[i] = serial_read_byte();
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sync_send();
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checksum_computed += ROW_MASK & serial_master_buffer[i];
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}
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matrix_row_t checksum_received = serial_read_byte();
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sync_send();
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serial_input(); // end transaction
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if ( checksum_computed != checksum_received ) {
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status |= SLAVE_DATA_CORRUPT;
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} else {
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status &= ~SLAVE_DATA_CORRUPT;
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}
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}
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inline
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bool serial_slave_DATA_CORRUPT(void) {
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return status & SLAVE_DATA_CORRUPT;
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}
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// Copies the serial_slave_buffer to the master and sends the
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// serial_master_buffer to the slave.
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//
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// Returns:
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// 0 => no error
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// 1 => slave did not respond
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int serial_update_buffers(void) {
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// this code is very time dependent, so we need to disable interrupts
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cli();
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// signal to the slave that we want to start a transaction
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serial_output();
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serial_low();
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_delay_us(1);
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// wait for the slaves response
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serial_input();
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serial_high();
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_delay_us(SERIAL_DELAY);
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// check if the slave is present
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if (serial_read_pin()) {
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// slave failed to pull the line low, assume not present
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sei();
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return 1;
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}
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// if the slave is present syncronize with it
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sync_recv();
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matrix_row_t checksum_computed = 0;
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// receive data from the slave
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for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
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serial_slave_buffer[i] = serial_read_byte();
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sync_recv();
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checksum_computed += ROW_MASK & serial_slave_buffer[i];
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}
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matrix_row_t checksum_received = serial_read_byte();
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sync_recv();
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if (checksum_computed != checksum_received) {
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sei();
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return 1;
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}
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matrix_row_t checksum = 0;
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// 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 += ROW_MASK & 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
|
||||
@ -1,27 +0,0 @@
|
||||
#ifndef MY_SERIAL_H
|
||||
#define MY_SERIAL_H
|
||||
|
||||
#include "config.h"
|
||||
#include "matrix.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 matrix_row_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
|
||||
extern volatile matrix_row_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
|
||||
@ -1,86 +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"
|
||||
|
||||
#ifdef USE_I2C
|
||||
# include "i2c.h"
|
||||
#else
|
||||
# include "serial.h"
|
||||
#endif
|
||||
|
||||
volatile bool isLeftHand = true;
|
||||
|
||||
static void setup_handedness(void) {
|
||||
#ifdef EE_HANDS
|
||||
isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
|
||||
#else
|
||||
// I2C_MASTER_RIGHT is deprecated, use MASTER_RIGHT instead, since this works for both serial and i2c
|
||||
#if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
|
||||
isLeftHand = !has_usb();
|
||||
#else
|
||||
isLeftHand = has_usb();
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
|
||||
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
|
||||
Reference in New Issue
Block a user