hal_lpc175x_6x.c

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/**************************************************************************/
/**************************************************************************/

#include "common/common.h"
#include "hal.h"

#if TUSB_CFG_MCU == MCU_LPC175X_6X

#ifdef __CC_ARM
#pragma diag_suppress 66 // Suppress Keil warnings #66-D: enumeration value is out of "int" range
#endif

//--------------------------------------------------------------------+
// IMPLEMENTATION
//--------------------------------------------------------------------+
tusb_error_t hal_init(void)
{
  enum {
    USBCLK_DEVCIE = 0x12,     // AHB + Device
    USBCLK_HOST   = 0x19,     // AHB + Host + OTG (!)

    PCONP_PCUSB   = BIT_(31)
  };

  LPC_SC->PCONP |= PCONP_PCUSB; // enable USB Peripherals

  //------------- user manual 11.13 usb device controller initialization -------------//
  PINSEL_ConfigPin( &(PINSEL_CFG_Type) { .Portnum = 0, .Pinnum = 29, .Funcnum = 1} ); // P0.29 as D+
  PINSEL_ConfigPin( &(PINSEL_CFG_Type) { .Portnum = 0, .Pinnum = 30, .Funcnum = 1} ); // P0.30 as D-

#if MODE_HOST_SUPPORTED
  PINSEL_ConfigPin( &(PINSEL_CFG_Type) { .Portnum = 1, .Pinnum = 22, .Funcnum = 2} ); // P1.22 as USB_PWRD
  PINSEL_ConfigPin( &(PINSEL_CFG_Type) { .Portnum = 1, .Pinnum = 19, .Funcnum = 2} ); // P1.19 as USB_PPWR

  LPC_USB->USBClkCtrl = USBCLK_HOST;
  while ((LPC_USB->USBClkSt & USBCLK_HOST) != USBCLK_HOST);
  LPC_USB->OTGStCtrl = 0x3;
#endif

#if MODE_DEVICE_SUPPORTED
  LPC_PINCON->PINSEL4 = bit_set_range(LPC_PINCON->PINSEL4, 18, 19, BIN8(01)); // P2_9 as USB Connect

  // P1_30 as VBUS, ignore if it is already in VBUS mode
  if ( !(!BIT_TEST_(LPC_PINCON->PINSEL3, 28) && BIT_TEST_(LPC_PINCON->PINSEL3, 29)) )
  {
    // some board like lpcxpresso1769 does not connect VBUS signal to pin P1_30, this allow those board to overwrite
    // by always pulling P1_30 to high
    PINSEL_ConfigPin( &(PINSEL_CFG_Type) {
      .Portnum = 1, .Pinnum = 30,
      .Funcnum = 2, .Pinmode = PINSEL_PINMODE_PULLDOWN} );
  }

  LPC_USB->USBClkCtrl = USBCLK_DEVCIE;
  while ((LPC_USB->USBClkSt & USBCLK_DEVCIE) != USBCLK_DEVCIE);
#endif

  return TUSB_ERROR_NONE;
}

void USB_IRQHandler(void)
{
  tusb_isr(0);
}

#endif