forked from forks/qmk_firmware
Add SN74x138 demultiplexer driver (#16217)
This commit is contained in:
Ryan
GitHub
parent
f4e3f75ecc
commit
e036c19d06
65
drivers/gpio/sn74x138.c
Normal file
65
drivers/gpio/sn74x138.c
Normal file
|
|
@ -0,0 +1,65 @@
|
|||
/* Copyright 2022
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation, either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include "sn74x138.h"
|
||||
#include "gpio.h"
|
||||
|
||||
#define ADDRESS_PIN_COUNT 3
|
||||
|
||||
#ifndef SN74X138_ADDRESS_PINS
|
||||
# error sn74x138: no address pins defined!
|
||||
#endif
|
||||
|
||||
static const pin_t address_pins[ADDRESS_PIN_COUNT] = SN74X138_ADDRESS_PINS;
|
||||
|
||||
void sn74x138_init(void) {
|
||||
for (int i = 0; i < ADDRESS_PIN_COUNT; i++) {
|
||||
setPinOutput(address_pins[i]);
|
||||
writePinLow(address_pins[i]);
|
||||
}
|
||||
|
||||
#if defined(SN74X138_E1_PIN)
|
||||
setPinOutput(SN74X138_E1_PIN);
|
||||
writePinHigh(SN74X138_E1_PIN);
|
||||
#endif
|
||||
|
||||
#if defined(SN74X138_E2_PIN)
|
||||
setPinOutput(SN74X138_E2_PIN);
|
||||
writePinHigh(SN74X138_E2_PIN);
|
||||
#endif
|
||||
#if defined(SN74X138_E3_PIN)
|
||||
setPinOutput(SN74X138_E3_PIN);
|
||||
writePinLow(SN74X138_E3_PIN);
|
||||
#endif
|
||||
}
|
||||
|
||||
void sn74x138_set_enabled(bool enabled) {
|
||||
#if defined(SN74X138_E1_PIN)
|
||||
writePin(SN74X138_E1_PIN, !enabled);
|
||||
#endif
|
||||
#if defined(SN74X138_E2_PIN)
|
||||
writePin(SN74X138_E2_PIN, !enabled);
|
||||
#endif
|
||||
#if defined(SN74X138_E3_PIN)
|
||||
writePin(SN74X138_E3_PIN, enabled);
|
||||
#endif
|
||||
}
|
||||
|
||||
void sn74x138_set_addr(uint8_t address) {
|
||||
for (int i = 0; i < ADDRESS_PIN_COUNT; i++) {
|
||||
writePin(address_pins[i], address & (1 << i));
|
||||
}
|
||||
}
|
||||
48
drivers/gpio/sn74x138.h
Normal file
48
drivers/gpio/sn74x138.h
Normal file
|
|
@ -0,0 +1,48 @@
|
|||
/* Copyright 2022
|
||||
*
|
||||
* This program is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation, either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
|
||||
/**
|
||||
* Driver for 74x138 3-to-8 decoder/demultiplexer with inverting outputs
|
||||
* https://assets.nexperia.com/documents/data-sheet/74HC_HCT138.pdf
|
||||
*/
|
||||
|
||||
/**
|
||||
* Initialize the address and output enable pins.
|
||||
*/
|
||||
void sn74x138_init(void);
|
||||
|
||||
/**
|
||||
* Set the enabled state.
|
||||
*
|
||||
* When enabled is true, pulls the E1 and E2 pins low, and the E3 pin high.
|
||||
*
|
||||
* \param enabled The enable state to set.
|
||||
*/
|
||||
void sn74x138_set_enabled(bool enabled);
|
||||
|
||||
/**
|
||||
* Set the output pin address.
|
||||
*
|
||||
* The selected output pin will be pulled low, while the remaining output pins will be high.
|
||||
*
|
||||
* \param address The address to set, from 0 to 7.
|
||||
*/
|
||||
void sn74x138_set_addr(uint8_t address);
|
||||
|
|
@ -41,22 +41,16 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|||
*
|
||||
*/
|
||||
#define MATRIX_ROW_PINS { D6, D4, F6, F7, F4, F5, F0, F1 }
|
||||
#define MATRIX_COL_PINS { }
|
||||
#define MATRIX_COL_PINS { C7, B6, C6, B4, B5, D7, NO_PIN, NO_PIN, NO_PIN, NO_PIN, NO_PIN, NO_PIN, NO_PIN, D3, B7, B3 } // Columns 6-12 controlled by demux
|
||||
#define UNUSED_PINS
|
||||
|
||||
/* COL2ROW, ROW2COL*/
|
||||
#define DIODE_DIRECTION ROW2COL
|
||||
#define SN74X138_ADDRESS_PINS { D2, D1, D0 }
|
||||
|
||||
// For QMK DFU
|
||||
#define QMK_ESC_OUTPUT D6
|
||||
#define QMK_ESC_INPUT D7
|
||||
#define QMK_LED B0
|
||||
|
||||
/*
|
||||
* Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
|
||||
*/
|
||||
//#define SOFT_SERIAL_PIN D0 // or D1, D2, D3, E6
|
||||
|
||||
#define LED_NUM_LOCK_PIN B2
|
||||
#define LED_CAPS_LOCK_PIN B0
|
||||
#define LED_SCROLL_LOCK_PIN B1
|
||||
|
|
|
|||
|
|
@ -14,268 +14,66 @@ GNU General Public License for more details.
|
|||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include "wait.h"
|
||||
#include "util.h"
|
||||
#include "matrix.h"
|
||||
#include "debounce.h"
|
||||
#include "quantum.h"
|
||||
#include "sn74x138.h"
|
||||
|
||||
#ifdef DIRECT_PINS
|
||||
static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
|
||||
#elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
|
||||
static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
|
||||
//static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
|
||||
#endif
|
||||
static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
|
||||
|
||||
// matrix code
|
||||
|
||||
#ifdef DIRECT_PINS
|
||||
|
||||
static void init_pins(void) {
|
||||
for (int row = 0; row < MATRIX_ROWS; row++) {
|
||||
for (int col = 0; col < MATRIX_COLS; col++) {
|
||||
pin_t pin = direct_pins[row][col];
|
||||
if (pin != NO_PIN) {
|
||||
setPinInputHigh(pin);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
|
||||
matrix_row_t last_row_value = current_matrix[current_row];
|
||||
current_matrix[current_row] = 0;
|
||||
|
||||
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
|
||||
pin_t pin = direct_pins[current_row][col_index];
|
||||
if (pin != NO_PIN) {
|
||||
current_matrix[current_row] |= readPin(pin) ? 0 : (MATRIX_ROW_SHIFTER << col_index);
|
||||
}
|
||||
}
|
||||
|
||||
return (last_row_value != current_matrix[current_row]);
|
||||
}
|
||||
|
||||
#elif (DIODE_DIRECTION == COL2ROW)
|
||||
|
||||
static void select_row(uint8_t row) {
|
||||
setPinOutput(row_pins[row]);
|
||||
writePinLow(row_pins[row]);
|
||||
}
|
||||
|
||||
static void unselect_row(uint8_t row) { setPinInputHigh(row_pins[row]); }
|
||||
|
||||
static void unselect_rows(void) {
|
||||
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
|
||||
setPinInputHigh(row_pins[x]);
|
||||
}
|
||||
}
|
||||
|
||||
static void init_pins(void) {
|
||||
unselect_rows();
|
||||
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
|
||||
setPinInputHigh(col_pins[x]);
|
||||
}
|
||||
}
|
||||
|
||||
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_state = readPin(col_pins[col_index]);
|
||||
|
||||
// Populate the matrix row with the state of the col pin
|
||||
current_matrix[current_row] |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
|
||||
}
|
||||
|
||||
// Unselect row
|
||||
unselect_row(current_row);
|
||||
|
||||
return (last_row_value != current_matrix[current_row]);
|
||||
}
|
||||
|
||||
#elif (DIODE_DIRECTION == ROW2COL)
|
||||
|
||||
/* Cols 0 - 15
|
||||
* col 0: C7
|
||||
/* col 0: C7
|
||||
* col 1: B6
|
||||
* col 2: C6
|
||||
* col 3: B4
|
||||
* col 4: B5
|
||||
* col 5: D7
|
||||
* These columns use a 74HC237D 3 to 8 bit demultiplexer.
|
||||
* A0 A1 A2
|
||||
* col / pin: PD2 PD1 PD0
|
||||
*
|
||||
* These columns use a 74HC138 3 to 8 bit demultiplexer.
|
||||
* A2 A1 A0
|
||||
* col / pin: PD0 PD1 PD2
|
||||
* 6: 1 1 1
|
||||
* 7: 0 1 1
|
||||
* 7: 1 1 0
|
||||
* 8: 1 0 1
|
||||
* 9: 0 0 1
|
||||
* 10: 1 1 0
|
||||
* 9: 1 0 0
|
||||
* 10: 0 1 1
|
||||
* 11: 0 1 0
|
||||
* 12: 1 0 0
|
||||
* 12: 0 0 1
|
||||
*
|
||||
* col 13: D3
|
||||
* col 14: B7
|
||||
* col 15: B3
|
||||
*/
|
||||
static void select_col(uint8_t col) {
|
||||
switch (col) {
|
||||
case 0:
|
||||
writePinLow(C7);
|
||||
break;
|
||||
case 1:
|
||||
writePinLow(B6);
|
||||
break;
|
||||
case 2:
|
||||
writePinLow(C6);
|
||||
break;
|
||||
case 3:
|
||||
writePinLow(B4);
|
||||
break;
|
||||
case 4:
|
||||
writePinLow(B5);
|
||||
break;
|
||||
case 5:
|
||||
writePinLow(D7);
|
||||
break;
|
||||
case 6:
|
||||
writePinHigh(D0);
|
||||
writePinHigh(D1);
|
||||
writePinHigh(D2);
|
||||
break;
|
||||
case 7:
|
||||
writePinHigh(D0);
|
||||
writePinHigh(D1);
|
||||
break;
|
||||
case 8:
|
||||
writePinHigh(D0);
|
||||
writePinHigh(D2);
|
||||
break;
|
||||
case 9:
|
||||
writePinHigh(D0);
|
||||
break;
|
||||
case 10:
|
||||
writePinHigh(D1);
|
||||
writePinHigh(D2);
|
||||
break;
|
||||
case 11:
|
||||
writePinHigh(D1);
|
||||
break;
|
||||
case 12:
|
||||
writePinHigh(D2);
|
||||
break;
|
||||
case 13:
|
||||
writePinLow(D3);
|
||||
break;
|
||||
case 14:
|
||||
writePinLow(B7);
|
||||
break;
|
||||
case 15:
|
||||
writePinLow(B3);
|
||||
break;
|
||||
if (col_pins[col] != NO_PIN) {
|
||||
writePinLow(col_pins[col]);
|
||||
} else {
|
||||
sn74x138_set_addr(13 - col);
|
||||
}
|
||||
}
|
||||
|
||||
static void unselect_col(uint8_t col) {
|
||||
switch (col) {
|
||||
case 0:
|
||||
writePinHigh(C7);
|
||||
break;
|
||||
case 1:
|
||||
writePinHigh(B6);
|
||||
break;
|
||||
case 2:
|
||||
writePinHigh(C6);
|
||||
break;
|
||||
case 3:
|
||||
writePinHigh(B4);
|
||||
break;
|
||||
case 4:
|
||||
writePinHigh(B5);
|
||||
break;
|
||||
case 5:
|
||||
writePinHigh(D7);
|
||||
break;
|
||||
case 6:
|
||||
writePinLow(D0);
|
||||
writePinLow(D1);
|
||||
writePinLow(D2);
|
||||
break;
|
||||
case 7:
|
||||
writePinLow(D0);
|
||||
writePinLow(D1);
|
||||
break;
|
||||
case 8:
|
||||
writePinLow(D0);
|
||||
writePinLow(D2);
|
||||
break;
|
||||
case 9:
|
||||
writePinLow(D0);
|
||||
break;
|
||||
case 10:
|
||||
writePinLow(D1);
|
||||
writePinLow(D2);
|
||||
break;
|
||||
case 11:
|
||||
writePinLow(D1);
|
||||
break;
|
||||
case 12:
|
||||
writePinLow(D2);
|
||||
break;
|
||||
case 13:
|
||||
writePinHigh(D3);
|
||||
break;
|
||||
case 14:
|
||||
writePinHigh(B7);
|
||||
break;
|
||||
case 15:
|
||||
writePinHigh(B3);
|
||||
break;
|
||||
if (col_pins[col] != NO_PIN) {
|
||||
setPinOutput(col_pins[col]);
|
||||
writePinHigh(col_pins[col]);
|
||||
} else {
|
||||
sn74x138_set_addr(0);
|
||||
}
|
||||
}
|
||||
|
||||
static void unselect_cols(void) {
|
||||
//Native
|
||||
setPinOutput(D3);
|
||||
setPinOutput(D7);
|
||||
writePinHigh(D3);
|
||||
writePinHigh(D7);
|
||||
// Native
|
||||
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
|
||||
if (col_pins[x] != NO_PIN) {
|
||||
setPinOutput(col_pins[x]);
|
||||
writePinHigh(col_pins[x]);
|
||||
}
|
||||
}
|
||||
|
||||
setPinOutput(C6);
|
||||
setPinOutput(C7);
|
||||
writePinHigh(C6);
|
||||
writePinHigh(C7);
|
||||
|
||||
setPinOutput(B3);
|
||||
setPinOutput(B4);
|
||||
setPinOutput(B5);
|
||||
setPinOutput(B6);
|
||||
setPinOutput(B7);
|
||||
writePinHigh(B3);
|
||||
writePinHigh(B4);
|
||||
writePinHigh(B5);
|
||||
writePinHigh(B6);
|
||||
writePinHigh(B7);
|
||||
|
||||
//Demultiplexer
|
||||
setPinOutput(D0);
|
||||
setPinOutput(D1);
|
||||
setPinOutput(D2);
|
||||
writePinLow(D0);
|
||||
writePinLow(D1);
|
||||
writePinLow(D2);
|
||||
// Demultiplexer
|
||||
sn74x138_set_addr(0);
|
||||
}
|
||||
|
||||
static void init_pins(void) {
|
||||
|
|
@ -288,9 +86,9 @@ static void init_pins(void) {
|
|||
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 and wait for col selection to stabilize
|
||||
select_col(current_col);
|
||||
wait_us(30);
|
||||
matrix_io_delay();
|
||||
|
||||
// For each row...
|
||||
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
|
||||
|
|
@ -318,27 +116,20 @@ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
|
|||
return matrix_changed;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
void matrix_init_custom(void) {
|
||||
// initialize key pins
|
||||
init_pins();
|
||||
// initialize demultiplexer
|
||||
sn74x138_init();
|
||||
}
|
||||
|
||||
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
|
||||
bool changed = false;
|
||||
|
||||
#if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
|
||||
// Set row, read cols
|
||||
for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
|
||||
changed |= read_cols_on_row(current_matrix, current_row);
|
||||
}
|
||||
#elif (DIODE_DIRECTION == ROW2COL)
|
||||
// Set col, read rows
|
||||
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
|
||||
changed |= read_rows_on_col(current_matrix, current_col);
|
||||
}
|
||||
#endif
|
||||
|
||||
return changed;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -18,6 +18,7 @@ RGBLIGHT_ENABLE = no # Enable keyboard RGB underglow
|
|||
AUDIO_ENABLE = no # Audio output
|
||||
|
||||
CUSTOM_MATRIX = lite
|
||||
SRC += matrix.c
|
||||
VPATH += drivers/gpio
|
||||
SRC += matrix.c sn74x138.c
|
||||
|
||||
LAYOUTS = fullsize_ansi fullsize_iso tkl_ansi tkl_iso
|
||||
|
|
|
|||
Loading…
Reference in a new issue