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Diffstat (limited to 'keyboards/voyager/matrix.c')
-rw-r--r-- | keyboards/voyager/matrix.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/keyboards/voyager/matrix.c b/keyboards/voyager/matrix.c new file mode 100644 index 0000000000..4de3ed860d --- /dev/null +++ b/keyboards/voyager/matrix.c @@ -0,0 +1,241 @@ +/* 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; +}
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