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move PLLB (for USB) initialization to board_lowlevel.c

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This way it is present both inside the DFU loader and in the main app.
This commit is contained in:
Harald Welte
2017-02-28 01:28:56 +01:00
parent c430ac1f2a
commit 0395bd15b3
2 changed files with 24 additions and 23 deletions
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24
firmware/libboard/common/source/board_lowlevel.c
View File

@@ -81,9 +81,31 @@
#error "No PLL settings for current BOARD_MCK."
#endif
#if (BOARD_MAINOSC == 12000000)
#define PLLB_CFG (CKGR_PLLBR_DIVB(2)|CKGR_PLLBR_MULB(8-1)|CKGR_PLLBR_PLLBCOUNT_Msk)
#elif (BOARD_MAINOSC == 18432000)
#define PLLB_CFG (CKGR_PLLBR_DIVB(5)|CKGR_PLLBR_MULB(13-1)|CKGR_PLLBR_PLLBCOUNT_Msk)
#else
#error "Please configure PLLB for your MAINOSC freq"
#endif
/* Define clock timeout */
#define CLOCK_TIMEOUT 0xFFFFFFFF
/**
* \brief Configure 48MHz Clock for USB
*/
static void _ConfigureUsbClock(void)
{
/* Enable PLLB for USB */
PMC->CKGR_PLLBR = PLLB_CFG;
while ((PMC->PMC_SR & PMC_SR_LOCKB) == 0) ;
/* USB Clock uses PLLB */
PMC->PMC_USB = PMC_USB_USBDIV(0) /* /1 (no divider) */
| PMC_USB_USBS; /* PLLB */
}
/*----------------------------------------------------------------------------
* Exported functions
*----------------------------------------------------------------------------*/
@@ -165,6 +187,8 @@ extern WEAK void LowLevelInit( void )
/* Configure SysTick for 1ms */
SysTick_Config(BOARD_MCK/1000);
_ConfigureUsbClock();
}
/* SysTick based delay function */

23
firmware/libcommon/source/usb.c
View File

@@ -780,35 +780,12 @@ static const USBDDriverDescriptors driverDescriptors = {
STRING_DESC_CNT /* cnt string descriptors in list */
};
#if (BOARD_MAINOSC == 12000000)
#define PLLB_CFG (CKGR_PLLBR_DIVB(2)|CKGR_PLLBR_MULB(8-1)|CKGR_PLLBR_PLLBCOUNT_Msk)
#elif (BOARD_MAINOSC == 18432000)
#define PLLB_CFG (CKGR_PLLBR_DIVB(5)|CKGR_PLLBR_MULB(13-1)|CKGR_PLLBR_PLLBCOUNT_Msk)
#else
#error "Please configure PLLB for your MAINOSC freq"
#endif
/*----------------------------------------------------------------------------
* Functions
*----------------------------------------------------------------------------*/
/**
* \brief Configure 48MHz Clock for USB
*/
static void _ConfigureUsbClock(void)
{
/* Enable PLLB for USB */
PMC->CKGR_PLLBR = PLLB_CFG;
while ((PMC->PMC_SR & PMC_SR_LOCKB) == 0) ;
/* USB Clock uses PLLB */
PMC->PMC_USB = PMC_USB_USBDIV(0) /* /1 (no divider) */
| PMC_USB_USBS; /* PLLB */
}
void SIMtrace_USB_Initialize(void)
{
_ConfigureUsbClock();
// Get std USB driver
USBDDriver *pUsbd = USBD_GetDriver();