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/USB/USBFS/HOST_KM/User/USB_Host/ch32v20x_usbfs_host.c
+12 -6
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@@ -23,26 +23,32 @@ __attribute__((aligned(4))) uint8_t USBFS_TX_Buf[ USBFS_MAX_PACKET_SIZE ];
/*********************************************************************
* @fn USBFS_RCC_Init
*
* @brief Set USB port clock.
* Note: If the SystemCoreClock is selected as the USB clock source,
* only the frequency specified below can be used.
* @brief Initializes the usbfs clock configuration.
*
* @return none
*/
void USBFS_RCC_Init( void )
{
if( SystemCoreClock == 144000000 )
RCC_ClocksTypeDef RCC_ClocksStatus={0};
RCC_GetClocksFreq(&RCC_ClocksStatus);
if( RCC_ClocksStatus.SYSCLK_Frequency == 144000000 )
{
RCC_USBCLKConfig( RCC_USBCLKSource_PLLCLK_Div3 );
}
else if( SystemCoreClock == 96000000 )
else if( RCC_ClocksStatus.SYSCLK_Frequency == 96000000 )
{
RCC_USBCLKConfig( RCC_USBCLKSource_PLLCLK_Div2 );
}
else if( SystemCoreClock == 48000000 )
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 );
}
/*********************************************************************