iblock.cpp

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// Copyright (c) 2024 anabrid GmbH
// Contact: https://www.anabrid.com/licensing/
// SPDX-License-Identifier: MIT OR GPL-2.0-or-later
 
#include <block/iblock.h>
#include <bus/functions.h>
#include <entity/meta.h>
#include <utils/is_number.h>
#include <utils/logging.h>
 
#include "teensy/iblock.h"
#include "teensy/icmd.h"
 
FLASHMEM blocks::IBlockHAL_V_1_2_X::IBlockHAL_V_1_2_X(bus::addr_t block_address)
    : f_meta(block_address), f_cmd{bus::replace_function_idx(block_address, 2)},
      f_imatrix_reset{bus::replace_function_idx(block_address, 4)}, f_imatrix_sync{bus::replace_function_idx(
                                                                        block_address, 3)},
      scaling_register{bus::replace_function_idx(block_address, 5), true},
      scaling_register_sync{bus::replace_function_idx(block_address, 6)} {}
 
FLASHMEM bool blocks::IBlockHAL_V_1_2_X::write_outputs(const std::array<uint32_t, 16> &outputs) {
  f_imatrix_reset.trigger();
  delayNanoseconds(420);
 
  // TODO: This can be further improved by not naively iterating over the output indizes.
  // For each output, send the corresponding 32bit commands.
  // For output_idx < 7, the first two MT8816 chips are used, for >8 the later two.
  // This means, we can set two outputs simultaneously.
  // When setting later outputs, we need to *not* overwrite previous outputs on the other chips
  // Thus we remember what we send them and just send them the same thing again
  uint32_t remembered_command = 0;
  for (decltype(outputs.size()) output_idx = 0; output_idx < outputs.size() / 2; output_idx++) {
    uint32_t command = 0;
    const auto oidx_one_two = output_idx;
    const auto oidx_three_four = output_idx + outputs.size() / 2;
    if (!outputs[oidx_one_two] && !outputs[oidx_three_four])
      continue;
 
    // We can always set one output in range (0,15) and one in (16,31) in for each output
    for (uint8_t input_idx = 0; input_idx < NUM_INPUTS / 2; input_idx++) {
 
      command = 0;
 
      const auto iidx_one_three = input_idx;
      const auto iidx_two_four = input_idx + NUM_INPUTS / 2;
      bool actual_data = false;
      // First chip combines oidx_one_two and iidx_one_three
      if (outputs[oidx_one_two] & INPUT_BITMASK(iidx_one_three)) {
        command |= functions::ICommandRegisterFunction::chip_cmd_word(iidx_one_three, oidx_one_two);
        actual_data = true;
      } else {
        command |= (remembered_command & 0xFF);
      }
      // Similar combination for second chip
      if (outputs[oidx_one_two] & INPUT_BITMASK(iidx_two_four)) {
        command |= functions::ICommandRegisterFunction::chip_cmd_word(iidx_two_four, oidx_one_two) << 8;
        actual_data = true;
      } else {
        command |= (remembered_command & 0xFF00);
      }
      // Third chip
      if (outputs[oidx_three_four] & INPUT_BITMASK(iidx_one_three)) {
        command |= functions::ICommandRegisterFunction::chip_cmd_word(iidx_one_three, oidx_three_four) << 16;
        actual_data = true;
      } else {
        command |= (remembered_command & 0xFF0000);
      }
      // Fourth chip
      if (outputs[oidx_three_four] & INPUT_BITMASK(iidx_two_four)) {
        command |= functions::ICommandRegisterFunction::chip_cmd_word(iidx_two_four, oidx_three_four) << 24;
        actual_data = true;
      } else {
        command |= (remembered_command & 0xFF000000);
      }
 
      if (actual_data) {
        remembered_command = command;
        // Send out data
        if (!f_cmd.transfer32(command)) {
          LOG(ANABRID_PEDANTIC, __PRETTY_FUNCTION__);
          return false;
        }
        // Apply command
        f_imatrix_sync.trigger();
      }
    }
  }
  return true;
}
 
FLASHMEM bool blocks::IBlockHAL_V_1_2_X::write_upscaling(std::bitset<32> upscaling) {
  if (!scaling_register.transfer32(upscaling.to_ulong()))
    return false;
  scaling_register_sync.trigger();
  return true;
}