128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/**************************************************************************//**
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*
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* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2020-05-22 klcheng First version
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*
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******************************************************************************/
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#include <rtconfig.h>
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#if defined(BSP_USING_HSOTG)
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#include <rtdevice.h>
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#include <rtdbg.h>
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#include "NuMicro.h"
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/* This delay must be at least 10 us */
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static void _usb_init_delay(void)
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{
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volatile uint32_t i = 0x1000;
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while (i--)
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__NOP();
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return;
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}
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/* Check current usb role */
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static void usb_role(void)
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{
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uint32_t status;
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status = (HSOTG->STATUS) & (HSOTG_STATUS_ASHOST_Msk | HSOTG_STATUS_ASPERI_Msk | HSOTG_STATUS_IDSTS_Msk);
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if (status == (HSOTG_STATUS_IDSTS_Msk | HSOTG_STATUS_ASPERI_Msk))
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rt_kprintf("usb frame acts as peripheral\n");
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else if (status == HSOTG_STATUS_ASHOST_Msk)
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rt_kprintf("usb frame acts as host\n");
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else
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rt_kprintf("usb frame is unknown state: 0x%x\n", status);
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return;
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}
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MSH_CMD_EXPORT_ALIAS(usb_role, usb_role, check usb role);
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static int hsotg_init(void)
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{
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uint32_t u32RegLockBackup = SYS_IsRegLocked();
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SYS_UnlockReg();
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/* Set HSOTG as ID dependent role */
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SYS->USBPHY = SYS_USBPHY_HSUSBEN_Msk | (0x2 << SYS_USBPHY_HSUSBROLE_Pos);
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/* user should keep HSUSB PHY at reset mode at lease 10 us before changing to active mode */
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_usb_init_delay();
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SYS->USBPHY |= SYS_USBPHY_HSUSBACT_Msk;
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/* Enable OTG and ID detection function */
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HSOTG_ENABLE_PHY();
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HSOTG_ENABLE_ID_DETECT();
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NVIC_EnableIRQ(USBOTG20_IRQn);
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/* clear interrupt and enable relative interrupts */
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HSOTG_ENABLE_INT(HSOTG_INTEN_IDCHGIEN_Msk | HSOTG_INTEN_HOSTIEN_Msk | HSOTG_INTEN_PDEVIEN_Msk |
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HSOTG_INTEN_BVLDCHGIEN_Msk | HSOTG_INTEN_AVLDCHGIEN_Msk);
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if (u32RegLockBackup)
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SYS_LockReg();
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return (int)RT_EOK;
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}
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INIT_PREV_EXPORT(hsotg_init);
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/* HSOTG interrupt entry */
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void USBOTG20_IRQHandler(void)
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{
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__IO uint32_t reg;
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reg = HSOTG->INTSTS;
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/* usb id pin status change */
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if (reg & HSOTG_INTSTS_IDCHGIF_Msk)
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{
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HSOTG_CLR_INT_FLAG(HSOTG_INTSTS_IDCHGIF_Msk);
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LOG_D("usb id change");
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}
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/* usb acts as host */
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if (reg & HSOTG_INTSTS_HOSTIF_Msk)
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{
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HSOTG_CLR_INT_FLAG(HSOTG_INTSTS_HOSTIF_Msk);
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LOG_D("usb acts as host");
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}
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/* usb acts as peripheral */
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if (reg & HSOTG_INTSTS_PDEVIF_Msk)
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{
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HSOTG_CLR_INT_FLAG(HSOTG_INTSTS_PDEVIF_Msk);
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LOG_D("usb acts as peripheral");
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}
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/* A-device session valid state change */
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if (reg & HSOTG_INTSTS_AVLDCHGIF_Msk)
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{
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HSOTG_CLR_INT_FLAG(HSOTG_INTSTS_AVLDCHGIF_Msk);
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LOG_D("usb a-device session valid state change");
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}
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/* B-device session valid state change */
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if (reg & HSOTG_INTSTS_BVLDCHGIF_Msk)
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{
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HSOTG_CLR_INT_FLAG(HSOTG_INTSTS_BVLDCHGIF_Msk);
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LOG_D("usb b-device session valid state change");
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}
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}
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#endif /* defined(BSP_USING_HSOTG) */
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