timing_recurrent_pre_stochastic_impl.c

Go to the documentation of this file.

/*
 * Copyright (c) 2017 The University of Manchester
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#include "timing_recurrent_pre_stochastic_impl.h"
 
//---------------------------------------
// Globals
//---------------------------------------
// Exponential lookup-tables
uint16_t pre_exp_dist_lookup[STDP_FIXED_POINT_ONE];
uint16_t post_exp_dist_lookup[STDP_FIXED_POINT_ONE];
 
plasticity_trace_region_data_t plasticity_trace_region_data;
 
typedef struct {
    int32_t accumulator_depression_plus_one;
    int32_t accumulator_potentiation_minus_one;
    uint16_t pre_exp_dist_lookup[STDP_FIXED_POINT_ONE];
    uint16_t post_exp_dist_lookup[STDP_FIXED_POINT_ONE];
    uint32_t following_data[];
} pre_stochastic_config_t;
 
//---------------------------------------
// Functions
//---------------------------------------
address_t timing_initialise(address_t address) {
    pre_stochastic_config_t *config = (pre_stochastic_config_t *) address;
 
    // Copy plasticity region data from address
    // **NOTE** this seems somewhat safer than relying on sizeof
    plasticity_trace_region_data.accumulator_depression_plus_one =
            config->accumulator_depression_plus_one;
    plasticity_trace_region_data.accumulator_potentiation_minus_one =
            config->accumulator_potentiation_minus_one;
 
    log_debug("\tAccumulator depression=%d, Accumulator potentiation=%d",
            plasticity_trace_region_data.accumulator_depression_plus_one - 1,
            plasticity_trace_region_data.accumulator_potentiation_minus_one + 1);
 
    // Copy LUTs from following memory
    spin1_memcpy(pre_exp_dist_lookup, config->pre_exp_dist_lookup,
            sizeof(config->pre_exp_dist_lookup));
    spin1_memcpy(post_exp_dist_lookup, config->post_exp_dist_lookup,
            sizeof(config->post_exp_dist_lookup));
 
    return config->following_data;
}