| 220 | } |
| 221 | |
| 222 | void SPIBusManager::finalizeTransmission(SPIBusHandle handle) FL_NOEXCEPT { |
| 223 | if (!handle.is_valid || handle.bus_id >= mNumBuses) { |
| 224 | return; |
| 225 | } |
| 226 | |
| 227 | SPIBusInfo& bus = mBuses[handle.bus_id]; |
| 228 | if (!bus.is_initialized) { |
| 229 | return; // Bus not initialized |
| 230 | } |
| 231 | |
| 232 | // Only needed for multi-SPI modes (Dual-SPI, Quad-SPI, Octal-SPI, Hexadeca-SPI) |
| 233 | if (bus.bus_type != SPIBusType::DUAL_SPI && |
| 234 | bus.bus_type != SPIBusType::QUAD_SPI && |
| 235 | bus.bus_type != SPIBusType::OCTO_SPI && |
| 236 | bus.bus_type != SPIBusType::HEXADECA_SPI) { |
| 237 | return; |
| 238 | } |
| 239 | |
| 240 | // Handle Dual-SPI (runtime detection via getAll()) |
| 241 | if (bus.bus_type == SPIBusType::DUAL_SPI) { |
| 242 | if (!bus.hw_controller) { |
| 243 | return; |
| 244 | } |
| 245 | |
| 246 | // Find maximum lane size |
| 247 | size_t max_size = 0; |
| 248 | for (u8 i = 0; i < bus.num_devices && i < 2; i++) { |
| 249 | if (bus.devices[i].is_enabled && i < bus.lane_buffers.size()) { |
| 250 | max_size = fl::max(max_size, bus.lane_buffers[i].size()); |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | if (max_size == 0) { |
| 255 | return; // No data to transmit |
| 256 | } |
| 257 | |
| 258 | // Acquire DMA buffer (zero-copy API) - use polymorphic interface |
| 259 | DMABuffer result = bus.hw_controller->acquireDMABuffer(max_size); |
| 260 | if (!result.ok()) { |
| 261 | FL_WARN_FMT("SPI Bus Manager: Failed to acquire DMA buffer for Dual-SPI: " << static_cast<int>(result.error())); |
| 262 | // Clear buffers and bail |
| 263 | for (auto& lane_buffer : bus.lane_buffers) { |
| 264 | lane_buffer.clear(); |
| 265 | } |
| 266 | return; |
| 267 | } |
| 268 | fl::span<u8> dma_buf = result.data(); |
| 269 | |
| 270 | // Prepare 2-lane data for transposer |
| 271 | fl::optional<SPITransposer::LaneData> lane0, lane1; |
| 272 | if (bus.num_devices > 0 && bus.devices[0].is_enabled && 0 < bus.lane_buffers.size()) { |
| 273 | lane0 = SPITransposer::LaneData{ |
| 274 | bus.lane_buffers[0], |
| 275 | fl::span<const u8>() // No padding frame yet |
| 276 | }; |
| 277 | } |
| 278 | if (bus.num_devices > 1 && bus.devices[1].is_enabled && 1 < bus.lane_buffers.size()) { |
| 279 | lane1 = SPITransposer::LaneData{ |
no test coverage detected