| // Copyright 2022 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. |
| |
| #include "app_common/common.h" |
| #include "pw_digital_io_arduino/digital_io.h" |
| #include "pw_display_driver_ili9341/display_driver.h" |
| #include "pw_spi_arduino/chip_selector.h" |
| #include "pw_spi_arduino/initiator.h" |
| #include "pw_sync/borrow.h" |
| #include "pw_sync/mutex.h" |
| |
| using pw::Status; |
| using pw::display::Display; |
| using DisplayDriver = pw::display_driver::DisplayDriverILI9341; |
| using pw::framebuffer::FramebufferRgb565; |
| using pw::spi::Device; |
| using pw::spi::Initiator; |
| using pw::sync::Borrowable; |
| using pw::sync::VirtualMutex; |
| using DigitalOut = pw::digital_io::ArduinoDigitalOut; |
| using SpiChipSelector = pw::spi::ArduinoChipSelector; |
| using SpiInitiator = pw::spi::ArduinoInitiator; |
| |
| namespace { |
| |
| struct SpiValues { |
| SpiValues(pw::spi::Config config, |
| pw::spi::ChipSelector& selector, |
| pw::sync::VirtualMutex& initiator_mutex); |
| |
| pw::spi::ArduinoInitiator initiator; |
| pw::sync::Borrowable<pw::spi::Initiator> borrowable_initiator; |
| pw::spi::Device device; |
| }; |
| |
| constexpr int kScaleFactor = 1; |
| constexpr int kFramebufferWidth = LCD_WIDTH / kScaleFactor; |
| constexpr int kFramebufferHeight = LCD_HEIGHT / kScaleFactor; |
| constexpr int kNumPixels = kFramebufferWidth * kFramebufferHeight; |
| constexpr int kFramebufferRowBytes = kFramebufferWidth * sizeof(uint16_t); |
| |
| constexpr pw::spi::Config kSpiConfig8Bit{ |
| .polarity = pw::spi::ClockPolarity::kActiveHigh, |
| .phase = pw::spi::ClockPhase::kFallingEdge, |
| .bits_per_word = pw::spi::BitsPerWord(8), |
| .bit_order = pw::spi::BitOrder::kMsbFirst, |
| }; |
| constexpr pw::spi::Config kSpiConfig16Bit{ |
| .polarity = pw::spi::ClockPolarity::kActiveHigh, |
| .phase = pw::spi::ClockPhase::kFallingEdge, |
| .bits_per_word = pw::spi::BitsPerWord(16), |
| .bit_order = pw::spi::BitOrder::kMsbFirst, |
| }; |
| |
| DigitalOut s_display_dc_pin(TFT_DC); |
| #if TFT_RST != -1 |
| DigitalOut s_display_reset_pin(TFT_RST); |
| #endif |
| DigitalOut s_display_cs_pin(TFT_CS); |
| SpiChipSelector s_spi_chip_selector(s_display_cs_pin); |
| SpiInitiator s_spi_initiator; |
| VirtualMutex s_spi_initiator_mutex; |
| Borrowable<Initiator> s_borrowable_spi_initiator(s_spi_initiator, |
| s_spi_initiator_mutex); |
| SpiValues s_spi_8_bit(kSpiConfig8Bit, |
| s_spi_chip_selector, |
| s_spi_initiator_mutex); |
| SpiValues s_spi_16_bit(kSpiConfig16Bit, |
| s_spi_chip_selector, |
| s_spi_initiator_mutex); |
| DisplayDriver s_display_driver({ |
| .data_cmd_gpio = s_display_dc_pin, |
| #if TFT_RST != -1 |
| .reset_gpio = &s_display_reset_pin, |
| #else |
| .reset_gpio = nullptr, |
| #endif |
| .spi_device_8_bit = s_spi_8_bit.device, |
| .spi_device_16_bit = s_spi_16_bit.device, |
| }); |
| uint16_t s_pixel_data[kNumPixels]; |
| Display s_display(FramebufferRgb565(s_pixel_data, |
| kFramebufferWidth, |
| kFramebufferHeight, |
| kFramebufferRowBytes), |
| s_display_driver); |
| |
| SpiValues::SpiValues(pw::spi::Config config, |
| pw::spi::ChipSelector& selector, |
| pw::sync::VirtualMutex& initiator_mutex) |
| : borrowable_initiator(initiator, initiator_mutex), |
| device(borrowable_initiator, config, selector) {} |
| |
| } // namespace |
| |
| // static |
| Status Common::Init() { |
| s_display_cs_pin.Enable(); |
| s_display_dc_pin.Enable(); |
| #if TFT_RST != -1 |
| s_display_reset_pin.Enable(); |
| #endif |
| |
| SPI.begin(); |
| |
| PW_TRY(s_display_driver.Init()); |
| |
| return s_display.Init(); |
| } |
| |
| // static |
| pw::display::Display& Common::GetDisplay() { return s_display; } |