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-rw-r--r--keyboards/voyager/matrix.c241
1 files changed, 241 insertions, 0 deletions
diff --git a/keyboards/voyager/matrix.c b/keyboards/voyager/matrix.c
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+/* Copyright 2020 ZSA Technology Labs, Inc <@zsa>
+ * Copyright 2020 Jack Humbert <jack.humb@gmail.com>
+ * Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "voyager.h"
+#include "is31fl3731.h"
+#include "i2c_master.h"
+
+extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
+extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
+static matrix_row_t raw_matrix_right[MATRIX_COLS];
+
+#define ROWS_PER_HAND (MATRIX_ROWS / 2)
+#ifndef VOYAGER_I2C_TIMEOUT
+# define VOYAGER_I2C_TIMEOUT 100
+#endif
+
+extern bool mcp23018_leds[3];
+extern bool is_launching;
+
+bool mcp23018_initd = false;
+// extern bool IS31FL3731_initd;
+static uint8_t mcp23018_reset_loop;
+// static uint8_t is31fl3731_reset_loop;
+
+uint8_t mcp23018_tx[3];
+uint8_t mcp23018_rx[1];
+
+void mcp23018_init(void) {
+ i2c_init();
+
+ mcp23018_tx[0] = 0x00; // IODIRA
+ mcp23018_tx[1] = 0b00000000; // A is output
+ mcp23018_tx[2] = 0b00111111; // B is inputs
+
+ if (MSG_OK == i2c_transmit(MCP23018_DEFAULT_ADDRESS << 1, mcp23018_tx, 3, VOYAGER_I2C_TIMEOUT)) {
+ mcp23018_tx[0] = 0x0C; // GPPUA
+ mcp23018_tx[1] = 0b10000000; // A is not pulled-up
+ mcp23018_tx[2] = 0b11111111; // B is pulled-up
+ wait_ms(5);
+
+ if (MSG_OK == i2c_transmit(MCP23018_DEFAULT_ADDRESS << 1, mcp23018_tx, 3, VOYAGER_I2C_TIMEOUT)) {
+ wait_ms(5);
+ mcp23018_initd = is_launching = true;
+ }
+ }
+}
+
+bool io_expander_ready(void) {
+ uint8_t tx[1] = {0x13};
+ if (MSG_OK == i2c_readReg(MCP23018_DEFAULT_ADDRESS << 1, tx[0], &tx[0], 1, VOYAGER_I2C_TIMEOUT)) {
+ return true;
+ }
+ return false;
+}
+
+void matrix_init_custom(void) {
+ // outputs
+ setPinOutput(B10);
+ setPinOutput(B11);
+ setPinOutput(B12);
+ setPinOutput(B13);
+ setPinOutput(B14);
+ setPinOutput(B15);
+
+ // inputs
+ setPinInputLow(A0);
+ setPinInputLow(A1);
+ setPinInputLow(A2);
+ setPinInputLow(A3);
+ setPinInputLow(A6);
+ setPinInputLow(A7);
+ setPinInputLow(B0);
+
+ mcp23018_init();
+}
+
+bool matrix_scan_custom(matrix_row_t current_matrix[]) {
+ bool changed = false;
+ // Attempt to reset the mcp23018 if it's not initialized
+ if (!mcp23018_initd) {
+ if (++mcp23018_reset_loop == 0) {
+ // Since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans. This will be approx bit more frequent than once per second.
+ if (io_expander_ready()) {
+ // If we managed to initialize the mcp23018 - we need to reinitialize the matrix / layer state. During an electric discharge the i2c peripherals might be in a weird state. Giving a delay and resetting the MCU allows to recover from this.
+ wait_ms(200);
+ mcu_reset();
+ }
+ }
+ }
+
+ // Scanning left and right side of the keyboard for key presses.
+ // Left side is scanned by reading the gpio pins directly, right side is scanned by reading the mcp23018 registers.
+
+ matrix_row_t data = 0;
+ for (uint8_t row = 0; row <= ROWS_PER_HAND; row++) {
+ // strobe row
+ switch (row) {
+ case 0:
+ writePinHigh(B10);
+ break;
+ case 1:
+ writePinHigh(B11);
+ break;
+ case 2:
+ writePinHigh(B12);
+ break;
+ case 3:
+ writePinHigh(B13);
+ break;
+ case 4:
+ writePinHigh(B14);
+ break;
+ case 5:
+ writePinHigh(B15);
+ break;
+ case 6:
+ break; // Left hand has 6 rows
+ }
+
+ // Selecting the row on the right side of the keyboard.
+ if (mcp23018_initd) {
+ // select row
+ mcp23018_tx[0] = 0x12; // GPIOA
+ mcp23018_tx[1] = (0b01111111 & ~(1 << (row))) | ((uint8_t)!mcp23018_leds[2] << 7); // activate row
+ mcp23018_tx[2] = ((uint8_t)!mcp23018_leds[1] << 6) | ((uint8_t)!mcp23018_leds[0] << 7); // activate row
+
+ if (MSG_OK != i2c_transmit(MCP23018_DEFAULT_ADDRESS << 1, mcp23018_tx, 3, VOYAGER_I2C_TIMEOUT)) {
+ mcp23018_initd = false;
+ }
+ }
+ // Reading the left side of the keyboard.
+ if (row < ROWS_PER_HAND) {
+ // i2c comm incur enough wait time
+ if (!mcp23018_initd) {
+ // need wait to settle pin state
+ matrix_io_delay();
+ }
+ // read col data
+ data = ((readPin(A0) << 0) | (readPin(A1) << 1) | (readPin(A2) << 2) | (readPin(A3) << 3) | (readPin(A6) << 4) | (readPin(A7) << 5) | (readPin(B0) << 6));
+ // unstrobe row
+ switch (row) {
+ case 0:
+ writePinLow(B10);
+ break;
+ case 1:
+ writePinLow(B11);
+ break;
+ case 2:
+ writePinLow(B12);
+ break;
+ case 3:
+ writePinLow(B13);
+ break;
+ case 4:
+ writePinLow(B14);
+ break;
+ case 5:
+ writePinLow(B15);
+ break;
+ case 6:
+ break;
+ }
+
+ if (current_matrix[row] != data) {
+ current_matrix[row] = data;
+ changed = true;
+ }
+ }
+
+ // Reading the right side of the keyboard.
+ if (mcp23018_initd) {
+ for (uint16_t i = 0; i < IO_EXPANDER_OP_DELAY; i++) {
+ __asm__("nop");
+ }
+
+ mcp23018_tx[0] = 0x13; // GPIOB
+ if (MSG_OK != i2c_readReg(MCP23018_DEFAULT_ADDRESS << 1, mcp23018_tx[0], &mcp23018_rx[0], 1, VOYAGER_I2C_TIMEOUT)) {
+ mcp23018_initd = false;
+ }
+ data = ~(mcp23018_rx[0] & 0b00111111);
+ for (uint16_t i = 0; i < IO_EXPANDER_OP_DELAY; i++) {
+ __asm__("nop");
+ }
+ } else {
+ data = 0;
+ }
+
+ if (raw_matrix_right[row] != data) {
+ raw_matrix_right[row] = data;
+ changed = true;
+ }
+ }
+
+ for (uint8_t row = 0; row < ROWS_PER_HAND; row++) {
+ current_matrix[11 - row] = 0;
+ for (uint8_t col = 0; col < MATRIX_COLS; col++) {
+ current_matrix[11 - row] |= ((raw_matrix_right[6 - col] & (1 << row) ? 1 : 0) << col);
+ }
+ }
+ return changed;
+}
+
+// DO NOT REMOVE
+// Needed for proper wake/sleep
+void matrix_power_up(void) {
+ bool temp_launching = is_launching;
+
+ matrix_init_custom();
+
+ is_launching = temp_launching;
+ if (!temp_launching) {
+ STATUS_LED_1(false);
+ STATUS_LED_2(false);
+ STATUS_LED_3(false);
+ STATUS_LED_4(false);
+ }
+
+ // initialize matrix state: all keys off
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ matrix[i] = 0;
+ }
+}
+
+bool is_transport_connected(void) {
+ return mcp23018_initd;
+} \ No newline at end of file