- /* Copyright 2021 QMK
- *
- * 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 <string.h>
- #include <debug.h>
-
- #include "transactions.h"
- #include "transport.h"
- #include "transaction_id_define.h"
- #include "atomic_util.h"
-
- #ifdef USE_I2C
-
- # ifndef SLAVE_I2C_TIMEOUT
- # define SLAVE_I2C_TIMEOUT 100
- # endif // SLAVE_I2C_TIMEOUT
-
- # ifndef SLAVE_I2C_ADDRESS
- # define SLAVE_I2C_ADDRESS 0x32
- # endif
-
- # include "i2c_master.h"
- # include "i2c_slave.h"
-
- // Ensure the I2C buffer has enough space
- _Static_assert(sizeof(split_shared_memory_t) <= I2C_SLAVE_REG_COUNT, "split_shared_memory_t too large for I2C_SLAVE_REG_COUNT");
-
- split_shared_memory_t *const split_shmem = (split_shared_memory_t *)i2c_slave_reg;
-
- void transport_master_init(void) {
- i2c_init();
- }
- void transport_slave_init(void) {
- i2c_slave_init(SLAVE_I2C_ADDRESS);
- }
-
- i2c_status_t transport_trigger_callback(int8_t id) {
- // If there's no callback, indicate that we were successful
- if (!split_transaction_table[id].slave_callback) {
- return I2C_STATUS_SUCCESS;
- }
-
- // Kick off the "callback executor", now that data has been written to the slave
- split_shmem->transaction_id = id;
- split_transaction_desc_t *trans = &split_transaction_table[I2C_EXECUTE_CALLBACK];
- return i2c_write_register(SLAVE_I2C_ADDRESS, trans->initiator2target_offset, split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size, SLAVE_I2C_TIMEOUT);
- }
-
- bool transport_execute_transaction(int8_t id, const void *initiator2target_buf, uint16_t initiator2target_length, void *target2initiator_buf, uint16_t target2initiator_length) {
- i2c_status_t status;
- split_transaction_desc_t *trans = &split_transaction_table[id];
- if (initiator2target_length > 0) {
- size_t len = trans->initiator2target_buffer_size < initiator2target_length ? trans->initiator2target_buffer_size : initiator2target_length;
- memcpy(split_trans_initiator2target_buffer(trans), initiator2target_buf, len);
- if ((status = i2c_write_register(SLAVE_I2C_ADDRESS, trans->initiator2target_offset, split_trans_initiator2target_buffer(trans), len, SLAVE_I2C_TIMEOUT)) < 0) {
- return false;
- }
- }
-
- // If we need to execute a callback on the slave, do so
- if ((status = transport_trigger_callback(id)) < 0) {
- return false;
- }
-
- if (target2initiator_length > 0) {
- size_t len = trans->target2initiator_buffer_size < target2initiator_length ? trans->target2initiator_buffer_size : target2initiator_length;
- if ((status = i2c_read_register(SLAVE_I2C_ADDRESS, trans->target2initiator_offset, split_trans_target2initiator_buffer(trans), len, SLAVE_I2C_TIMEOUT)) < 0) {
- return false;
- }
- memcpy(target2initiator_buf, split_trans_target2initiator_buffer(trans), len);
- }
-
- return true;
- }
-
- #else // USE_I2C
-
- # include "serial.h"
-
- static split_shared_memory_t shared_memory;
- split_shared_memory_t *const split_shmem = &shared_memory;
-
- void transport_master_init(void) {
- soft_serial_initiator_init();
- }
- void transport_slave_init(void) {
- soft_serial_target_init();
- }
-
- bool transport_execute_transaction(int8_t id, const void *initiator2target_buf, uint16_t initiator2target_length, void *target2initiator_buf, uint16_t target2initiator_length) {
- split_transaction_desc_t *trans = &split_transaction_table[id];
- if (initiator2target_length > 0) {
- size_t len = trans->initiator2target_buffer_size < initiator2target_length ? trans->initiator2target_buffer_size : initiator2target_length;
- memcpy(split_trans_initiator2target_buffer(trans), initiator2target_buf, len);
- }
-
- if (!soft_serial_transaction(id)) {
- return false;
- }
-
- if (target2initiator_length > 0) {
- size_t len = trans->target2initiator_buffer_size < target2initiator_length ? trans->target2initiator_buffer_size : target2initiator_length;
- memcpy(target2initiator_buf, split_trans_target2initiator_buffer(trans), len);
- }
-
- return true;
- }
-
- #endif // USE_I2C
-
- bool transport_master(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
- return transactions_master(master_matrix, slave_matrix);
- }
-
- void transport_slave(matrix_row_t master_matrix[], matrix_row_t slave_matrix[]) {
- transactions_slave(master_matrix, slave_matrix);
- }
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