133 lines
3.0 KiB
C
133 lines
3.0 KiB
C
/*!
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\file usbd_pwr.c
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\brief USB device power management driver
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*/
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/*
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Copyright (C) 2017 GigaDevice
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2017-02-10, V1.0.0, firmware for GD32F30x
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*/
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#include "usbd_pwr.h"
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#ifdef USBD_LOWPWR_MODE_ENABLE
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static void lowpower_mode_exit (void);
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#endif /* USBD_LOWPWR_MODE_ENABLE */
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__IO uint8_t g_ESOF_count = 0U;
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__IO uint8_t g_suspend_enabled = 1U;
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__IO uint8_t g_remote_wakeup_on = 0U;
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#ifdef LPM_ENABLED
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extern __IO uint32_t L1_resume;
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#endif /* LPM_ENABLED */
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/*!
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\brief USB wakeup first operation is to wakeup mcu
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\param[in] none
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\param[out] none
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\retval none
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*/
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void resume_mcu (void)
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{
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/* clear low_power mode bit in USBD_CTL */
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USBD_REG_SET(USBD_CTL, USBD_REG_GET(USBD_CTL) & (~CTL_LOWM));
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#ifdef USBD_LOWPWR_MODE_ENABLE
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/* restore normal operations */
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lowpower_mode_exit();
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#endif /* USBD_LOWPWR_MODE_ENABLE */
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/* clear SETSPS bit */
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USBD_REG_SET(USBD_CTL, USBD_REG_GET(USBD_CTL) & (~CTL_SETSPS));
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}
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#ifdef USBD_LOWPWR_MODE_ENABLE
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/*!
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\brief restore system clocks and power while exiting suspend mode
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\param[in] none
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\param[out] none
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\retval none
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*/
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static void lowpower_mode_exit (void)
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{
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/* restore system clock */
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/* enable HSE */
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rcu_osci_on(RCU_HXTAL);
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/* wait till HSE is ready */
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while(RESET == rcu_flag_get(RCU_FLAG_HXTALSTB));
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/* enable PLL */
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rcu_osci_on(RCU_PLL_CK);
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/* wait till PLL is ready */
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while(RESET == rcu_flag_get(RCU_FLAG_PLLSTB));
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/* select PLL as system clock source */
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rcu_system_clock_source_config(RCU_CKSYSSRC_PLL);
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/* wait till PLL is used as system clock source */
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while(0x08 != rcu_system_clock_source_get());
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/* low power sleep on exit disabled */
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system_lowpower_reset(SCB_LPM_DEEPSLEEP);
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}
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#endif /* USBD_LOWPWR_MODE_ENABLE */
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/*!
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\brief set USB device to suspend mode
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\param[in] none
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\param[out] none
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\retval none
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*/
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void usbd_suspend (void)
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{
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/* set usb module to suspend and low-power mode */
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USBD_REG_SET(USBD_CTL, USBD_REG_GET(USBD_CTL) | CTL_SETSPS | CTL_LOWM);
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#ifdef USBD_LOWPWR_MODE_ENABLE
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/* check wakeup flag is set */
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if (0 == (USBD_REG_GET(USBD_INTF) & INTF_WKUPIF)) {
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/* enter DEEP_SLEEP mode with LDO in low power mode */
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pmu_to_deepsleepmode(PMU_LDO_LOWPOWER, WFI_CMD);
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} else {
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/* clear wakeup interrupt flag */
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USBD_REG_SET(USBD_INTF, CLR_WKUPIF);
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/* clear set_suspend flag */
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USBD_REG_SET(USBD_CTL, USBD_REG_GET(USBD_CTL) & ~CTL_SETSPS);
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}
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#endif /* USBD_LOWPWR_MODE_ENABLE */
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}
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/*!
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\brief start to remote wakeup
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\param[in] none
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\param[out] none
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\retval none
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*/
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void usbd_remote_wakeup_active(void)
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{
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resume_mcu();
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#ifdef LPM_ENABLED
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USBD_REG_SET(USBD_CTL, USBD_REG_GET(USBD_CTL) | CTL_L1RSREQ);
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L1_resume = 1U;
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#else
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g_remote_wakeup_on = 1U;
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g_ESOF_count = 15U;
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USBD_REG_SET(USBD_CTL, USBD_REG_GET(USBD_CTL) | CTL_RSREQ);
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#endif /* LPM_ENABLED */
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}
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