| // Copyright 2023 The Pigweed Authors |
| // |
| // 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. |
| #pragma once |
| |
| #include <array> |
| #include <cstddef> |
| |
| #include "hardware/dma.h" |
| #include "hardware/irq.h" |
| #include "hardware/pio.h" |
| #include "pw_pixel_pusher/pixel_pusher.h" |
| #include "pw_sync/binary_semaphore.h" |
| |
| /// @defgroup pw_pixel_pusher_rp2040_pio |
| |
| namespace pw::pixel_pusher { |
| |
| /// @ingroup pw_pixel_pusher_rp2040_pio |
| /// |
| /// Implementation of pw_pixel_pusher that uses the RP2040 PIO block to write |
| /// pixels over SPI with pixel doubling. |
| class PixelPusherRp2040Pio : public PixelPusher { |
| public: |
| PixelPusherRp2040Pio( |
| int dc_pin, int cs_pin, int dout_pin, int sck_pin, int te_pin, PIO pio); |
| ~PixelPusherRp2040Pio(); |
| |
| // PixelPusher implementation: |
| Status Init( |
| const pw::framebuffer_pool::FramebufferPool& framebuffer_pool) override; |
| void WriteFramebuffer(framebuffer::Framebuffer framebuffer, |
| WriteCallback complete_callback) override; |
| bool SupportsResize() const override { return true; } |
| |
| // RP2040 PIO Functions |
| void SetPixelDouble(bool enabled); |
| bool DmaIsBusy(); |
| void SetupWriteFramebuffer(); |
| void Clear(); |
| bool VsyncCallback(gpio_irq_callback_t callback); |
| |
| private: |
| uint dc_pin_; |
| uint cs_pin_; |
| uint dout_pin_; |
| uint sck_pin_; |
| uint te_pin_; |
| PIO pio_; |
| bool pixel_double_enabled_ = false; |
| bool write_mode_ = false; |
| uint dma_channel_; |
| uint pio_sm_; |
| uint pio_offset_; |
| uint pio_double_offset_; |
| }; |
| |
| } // namespace pw::pixel_pusher |