tinyusb/hw/bsp/espressif/boards/family.c

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2020, Ha Thach (tinyusb.org)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * This file is part of the TinyUSB stack.
 */

#include "bsp/board_api.h"
#include "board.h"

#include "esp_rom_gpio.h"
#include "hal/gpio_ll.h"
#include "hal/usb_hal.h"
#include "soc/usb_periph.h"

#include "driver/rmt.h"
#include "driver/uart.h"

#if ESP_IDF_VERSION_MAJOR > 4
  #include "esp_private/periph_ctrl.h"
#else
  #include "driver/periph_ctrl.h"
#endif

#ifdef NEOPIXEL_PIN
#include "led_strip.h"
static led_strip_t *strip;
#endif

#if CFG_TUH_ENABLED && CFG_TUH_MAX3421
#include "driver/spi_master.h"
static void max3421_init(void);
#endif

static void configure_pins(usb_hal_context_t *usb);

//--------------------------------------------------------------------+
// Implementation
//--------------------------------------------------------------------+

// Initialize on-board peripherals : led, button, uart and USB
void board_init(void) {
#ifdef NEOPIXEL_PIN
  #ifdef NEOPIXEL_POWER_PIN
  gpio_reset_pin(NEOPIXEL_POWER_PIN);
  gpio_set_direction(NEOPIXEL_POWER_PIN, GPIO_MODE_OUTPUT);
  gpio_set_level(NEOPIXEL_POWER_PIN, NEOPIXEL_POWER_STATE);
  #endif

  // WS2812 Neopixel driver with RMT peripheral
  rmt_config_t config = RMT_DEFAULT_CONFIG_TX(NEOPIXEL_PIN, RMT_CHANNEL_0);
  config.clk_div = 2; // set counter clock to 40MHz

  rmt_config(&config);
  rmt_driver_install(config.channel, 0, 0);

  led_strip_config_t strip_config = LED_STRIP_DEFAULT_CONFIG(1, (led_strip_dev_t) config.channel);
  strip = led_strip_new_rmt_ws2812(&strip_config);
  strip->clear(strip, 100); // off led
#endif

  // Button
  esp_rom_gpio_pad_select_gpio(BUTTON_PIN);
  gpio_set_direction(BUTTON_PIN, GPIO_MODE_INPUT);
  gpio_set_pull_mode(BUTTON_PIN, BUTTON_STATE_ACTIVE ? GPIO_PULLDOWN_ONLY : GPIO_PULLUP_ONLY);

#if CFG_TUD_ENABLED
  // USB Controller Hal init
  periph_module_reset(PERIPH_USB_MODULE);
  periph_module_enable(PERIPH_USB_MODULE);

  usb_hal_context_t hal = {
      .use_external_phy = false // use built-in PHY
  };
  usb_hal_init(&hal);
  configure_pins(&hal);
#endif

#if CFG_TUH_ENABLED && CFG_TUH_MAX3421
  max3421_init();
#endif
}

static void configure_pins(usb_hal_context_t *usb) {
  /* usb_periph_iopins currently configures USB_OTG as USB Device.
   * Introduce additional parameters in usb_hal_context_t when adding support
   * for USB Host. */
  for (const usb_iopin_dsc_t *iopin = usb_periph_iopins; iopin->pin != -1; ++iopin) {
    if ((usb->use_external_phy) || (iopin->ext_phy_only == 0)) {
      esp_rom_gpio_pad_select_gpio(iopin->pin);
      if (iopin->is_output) {
        esp_rom_gpio_connect_out_signal(iopin->pin, iopin->func, false, false);
      } else {
        esp_rom_gpio_connect_in_signal(iopin->pin, iopin->func, false);
#if ESP_IDF_VERSION_MAJOR > 4
        if ((iopin->pin != GPIO_MATRIX_CONST_ZERO_INPUT) && (iopin->pin != GPIO_MATRIX_CONST_ONE_INPUT))
#else
        if ((iopin->pin != GPIO_FUNC_IN_LOW) && (iopin->pin != GPIO_FUNC_IN_HIGH))
#endif
        {
          gpio_ll_input_enable(&GPIO, iopin->pin);
        }
      }
      esp_rom_gpio_pad_unhold(iopin->pin);
    }
  }

  if (!usb->use_external_phy) {
    gpio_set_drive_capability(USBPHY_DM_NUM, GPIO_DRIVE_CAP_3);
    gpio_set_drive_capability(USBPHY_DP_NUM, GPIO_DRIVE_CAP_3);
  }
}

// Turn LED on or off
void board_led_write(bool state) {
#ifdef NEOPIXEL_PIN
  strip->set_pixel(strip, 0, (state ? 0x88 : 0x00), 0x00, 0x00);
  strip->refresh(strip, 100);
#endif
}

// Get the current state of button
// a '1' means active (pressed), a '0' means inactive.
uint32_t board_button_read(void) {
  return gpio_get_level(BUTTON_PIN) == BUTTON_STATE_ACTIVE;
}

// Get characters from UART
int board_uart_read(uint8_t *buf, int len) {
  return uart_read_bytes(UART_NUM_0, buf, len, 0);
}

// Send characters to UART
int board_uart_write(void const *buf, int len) {
  (void) buf;
  (void) len;
  return 0;
}

int board_getchar(void) {
  char c;
  return (uart_read_bytes(UART_NUM_0, &c, 1, 0) > 0) ? (int) c : (-1);
}

//--------------------------------------------------------------------+
// API: SPI transfer with MAX3421E, must be implemented by application
//--------------------------------------------------------------------+
#if CFG_TUH_ENABLED && defined(CFG_TUH_MAX3421) && CFG_TUH_MAX3421

static spi_device_handle_t max3421_spi;

static void IRAM_ATTR max3421_isr_handler(void* arg) {
  (void) arg; // arg is gpio num
  //xQueueSendFromISR(gpio_evt_queue, &gpio_num, NULL);
  gpio_set_level(13, 1);
  tuh_int_handler(1);
  gpio_set_level(13, 0);
}

static void max3421_init(void) {
  // CS pin
  gpio_set_direction(MAX3421_CS_PIN, GPIO_MODE_OUTPUT);
  gpio_set_level(MAX3421_CS_PIN, 1);

  // SPI
  spi_bus_config_t buscfg={
      .miso_io_num = MAX3421_MISO_PIN,
      .mosi_io_num = MAX3421_MOSI_PIN,
      .sclk_io_num = MAX3421_SCK_PIN,
      .quadwp_io_num = -1,
      .quadhd_io_num = -1,
      .data4_io_num = -1,
      .data5_io_num = -1,
      .data6_io_num = -1,
      .data7_io_num = -1,
      .max_transfer_sz = 1024
  };
  ESP_ERROR_CHECK( spi_bus_initialize(MAX3421_SPI_HOST, &buscfg, SPI_DMA_CH_AUTO) );

  spi_device_interface_config_t max3421_cfg = {
      .mode = 0,
      .clock_speed_hz = 4000000, // 26000000
      .spics_io_num = -1, // manual control CS
      .queue_size = 1
  };
  ESP_ERROR_CHECK( spi_bus_add_device(MAX3421_SPI_HOST, &max3421_cfg, &max3421_spi) );

  // debug
  gpio_set_direction(13, GPIO_MODE_OUTPUT);
  gpio_set_level(13, 0);

  // Interrupt pin
  gpio_set_direction(MAX3421_INTR_PIN, GPIO_MODE_INPUT);
  gpio_set_intr_type(MAX3421_INTR_PIN, GPIO_INTR_NEGEDGE);

  gpio_install_isr_service(0);
  gpio_isr_handler_add(MAX3421_INTR_PIN, max3421_isr_handler, NULL);
}

void tuh_max3421_int_api(uint8_t rhport, bool enabled) {
  (void) rhport;
  if (enabled) {
    gpio_intr_enable(MAX3421_INTR_PIN);
  } else {
    gpio_intr_disable(MAX3421_INTR_PIN);
  }
}

void tuh_max3421_spi_cs_api(uint8_t rhport, bool active) {
  (void) rhport;
  gpio_set_level(MAX3421_CS_PIN, active ? 0 : 1);
}

bool tuh_max3421_spi_xfer_api(uint8_t rhport, uint8_t const *tx_buf, size_t tx_len, uint8_t *rx_buf, size_t rx_len) {
  (void) rhport;

  spi_transaction_t xact = {
      .length = tx_len << 3, // length in bits
      .rxlength = rx_len << 3, // length in bits
      .tx_buffer = tx_buf,
      .rx_buffer = rx_buf
  };

  ESP_ERROR_CHECK(spi_device_transmit(max3421_spi, &xact));
  return true;
}

#endif