bstanwell/ch32v20x-examples
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This commit is contained in:
qiyongshuang
2024-11-11 14:32:11 +08:00
parent c4c38f507e
commit 961943f623
452 changed files with 9316 additions and 862 deletions
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EVT/EXAM/BLE/BLE_USB/APP/ch32v20x_usbfs_device.c
+22 -4
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@@ -185,11 +185,29 @@ void USBDeviceInit(void)
*
* @return none
*/
void USBFS_RCC_Init(void)
void USBFS_RCC_Init( void )
{
RCC->CFGR2 &= ~RCC_USBFS_CLK_SRC; //usbfs clock selection: 0 = systick, 1 = usb20_phy
RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_Div2);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_USBFS, ENABLE);
RCC_ClocksTypeDef RCC_ClocksStatus={0};
RCC_GetClocksFreq(&RCC_ClocksStatus);
if( RCC_ClocksStatus.SYSCLK_Frequency == 144000000 )
{
RCC_USBCLKConfig( RCC_USBCLKSource_PLLCLK_Div3 );
}
else if( RCC_ClocksStatus.SYSCLK_Frequency == 96000000 )
{
RCC_USBCLKConfig( RCC_USBCLKSource_PLLCLK_Div2 );
}
else if( RCC_ClocksStatus.SYSCLK_Frequency == 48000000 )
{
RCC_USBCLKConfig( RCC_USBCLKSource_PLLCLK_Div1 );
}
#if defined(CH32V20x_D8W) || defined(CH32V20x_D8)
else if ( RCC_ClocksStatus.SYSCLK_Frequency == 240000000 && RCC_USB5PRE_JUDGE() == SET )
{
RCC_USBCLKConfig( RCC_USBCLKSource_PLLCLK_Div5 );
}
#endif
RCC_AHBPeriphClockCmd( RCC_AHBPeriph_USBFS, ENABLE );
}
/*********************************************************************