mch2022-talktopics/components/mch2022-bsp/hardware.c

#include "hardware.h"
#include <driver/spi_master.h>
#include <esp_log.h>
#include <driver/gpio.h>
#include "managed_i2c.h"
#include "sdcard.h"
#include "rp2040.h"

static const char *TAG = "hardware";

static BNO055  dev_bno055  = {0};
static ILI9341 dev_ili9341 = {0};
static ICE40   dev_ice40   = {0};
static RP2040  dev_rp2040  = {0};

esp_err_t ice40_get_done_wrapper(bool* done) {
    uint8_t buttons[2];
    esp_err_t res = rp2040_read_buttons(&dev_rp2040, buttons);
    if (res != ESP_OK) return res;
    *done = !((buttons[0] >> 5) & 0x01);
    printf("FPGA done is %u\n", *done);
    return ESP_OK;
}

esp_err_t ice40_set_reset_wrapper(bool reset) {
    printf("FPGA reset set to %u\n", reset);
    esp_err_t res = rp2040_set_fpga(&dev_rp2040, reset);
    vTaskDelay(100 / portTICK_PERIOD_MS);
    return res;
}

void ili9341_set_lcd_mode(bool mode) {
    ESP_LOGI(TAG, "LCD mode switch to %s", mode ? "FPGA" : "ESP32");
    esp_err_t res = gpio_set_level(GPIO_LCD_MODE, mode);
    if (res != ESP_OK) {
        ESP_LOGE(TAG, "Setting LCD mode failed");
    }
}

static esp_err_t _bus_init() {
    esp_err_t res;

    // I2C bus
    res = i2c_init(I2C_BUS_SYS, GPIO_I2C_SYS_SDA, GPIO_I2C_SYS_SCL, I2C_SPEED_SYS, false, false);
    if (res != ESP_OK) {
        ESP_LOGE(TAG, "Initializing system I2C bus failed");
        return res;
    }

    // SPI bus
    spi_bus_config_t busConfiguration = {0};
    busConfiguration.mosi_io_num     = GPIO_SPI_MOSI;
    busConfiguration.miso_io_num     = GPIO_SPI_MISO;
    busConfiguration.sclk_io_num     = GPIO_SPI_CLK;
    busConfiguration.quadwp_io_num   = -1;
    busConfiguration.quadhd_io_num   = -1;
    busConfiguration.max_transfer_sz = SPI_MAX_TRANSFER_SIZE;
    res = spi_bus_initialize(SPI_BUS, &busConfiguration, SPI_DMA_CHANNEL);
    if (res != ESP_OK) {
        ESP_LOGE(TAG, "Initializing SPI bus failed");
        return res;
    }

    return ESP_OK;
}

// Board init

esp_err_t board_init(bool* aLcdReady) {
    if (aLcdReady != NULL) *aLcdReady = false;
    esp_err_t res;

    // Interrupts
    res = gpio_install_isr_service(0);
    if (res != ESP_OK) {
        ESP_LOGE(TAG, "Initializing ISR service failed");
        return res;
    }

    // Communication busses
    res = _bus_init();
    if (res != ESP_OK) return res;
    
    // LCD display
    dev_ili9341.spi_bus   = SPI_BUS;
    dev_ili9341.pin_cs    = GPIO_SPI_CS_LCD;
    dev_ili9341.pin_dcx   = GPIO_SPI_DC_LCD;
    dev_ili9341.pin_reset = GPIO_LCD_RESET;
    dev_ili9341.rotation  = 1;
    dev_ili9341.color_mode = true; // Blue and red channels are swapped
    dev_ili9341.spi_speed = 60000000; // 60MHz
    dev_ili9341.spi_max_transfer_size = SPI_MAX_TRANSFER_SIZE;
    dev_ili9341.callback = ili9341_set_lcd_mode; // Callback for changing LCD mode between ESP32 and FPGA
    
    res = gpio_set_direction(GPIO_LCD_MODE, GPIO_MODE_OUTPUT);
    if (res != ESP_OK) {
        ESP_LOGE(TAG, "Initializing LCD mode GPIO failed");
        return res;
    }

    res = ili9341_init(&dev_ili9341);
    if (res != ESP_OK) {
        ESP_LOGE(TAG, "Initializing LCD failed");
        return res;
    }
    
    if (aLcdReady != NULL) *aLcdReady = true;

    // RP2040 co-processor
    dev_rp2040.i2c_bus = I2C_BUS_SYS;
    dev_rp2040.i2c_address = RP2040_ADDR;
    dev_rp2040.pin_interrupt = GPIO_INT_RP2040;
    dev_rp2040.queue = xQueueCreate(8, sizeof(rp2040_input_message_t));
    
    res = rp2040_init(&dev_rp2040);
    if (res != ESP_OK) {
        ESP_LOGE(TAG, "Initializing RP2040 failed");
        return res;
    }
    
    uint8_t rp2040_fw_version;
    if (rp2040_get_firmware_version(&dev_rp2040, &rp2040_fw_version) != ESP_OK) {
        ESP_LOGE(TAG, "Initializing RP2040 failed to read firmware version");
        return ESP_FAIL;
    }
    
    if (rp2040_fw_version != 0xFF) { // Only init FPGA when RP2040 is not in bootloader mode
        // FPGA
        dev_ice40.spi_bus = SPI_BUS;
        dev_ice40.pin_cs = GPIO_SPI_CS_FPGA;
        dev_ice40.pin_done = -1;
        dev_ice40.pin_reset = -1;
        dev_ice40.pin_int = GPIO_INT_FPGA;
        dev_ice40.spi_speed_full_duplex = 26700000;
        dev_ice40.spi_speed_half_duplex = 40000000;
        dev_ice40.spi_max_transfer_size = SPI_MAX_TRANSFER_SIZE;
        dev_ice40.get_done = ice40_get_done_wrapper;
        dev_ice40.set_reset = ice40_set_reset_wrapper;

        res = ice40_init(&dev_ice40);
        if (res != ESP_OK) {
            ESP_LOGE(TAG, "Initializing FPGA failed");
            return res;
        }
    }

    // BNO055 sensor on system I2C bus

    res = bno055_init(&dev_bno055, I2C_BUS_SYS, BNO055_ADDR, GPIO_INT_BNO055, true);
    if (res != ESP_OK) {
        ESP_LOGE(TAG, "Initializing BNO055 failed");
        return res;
    }
    return res;
}

BNO055* get_bno055() {
    return &dev_bno055;
}

ILI9341* get_ili9341() {
    return &dev_ili9341;
}

ICE40* get_ice40() {
    return &dev_ice40;
}

RP2040* get_rp2040() {
    return &dev_rp2040;
}