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Strip out unnecessary clock and UART code

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The default values for SystemCoreClock, CyclesPerUs, and PllClock work
fine for my purposes of running from the 48 MHz HIRC. Remove unnecessary
initialization code. This is especially useful for the bootloader where
flash space is at a premium.

Also strip out unneeded UART setup code.
This commit is contained in:
Doug Brown 2023-06-23 20:09:00 -07:00 committed by Doug Brown
parent 3a7e3bf69f
commit 71af23b33e
2 changed files with 0 additions and 72 deletions
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57
hal/m258ke/nuvoton/system_M251.c
View File

@ -27,44 +27,6 @@ uint32_t CyclesPerUs = (__HSI / 1000000); /*!< Cycles per micro second
uint32_t PllClock = __HSI; /*!< PLL Output Clock Frequency */ uint32_t PllClock = __HSI; /*!< PLL Output Clock Frequency */
const uint32_t gau32ClkSrcTbl[8] = {__HXT, __LXT, 0UL, __LIRC, 0UL, __MIRC, 0UL, __HIRC}; const uint32_t gau32ClkSrcTbl[8] = {__HXT, __LXT, 0UL, __LIRC, 0UL, __MIRC, 0UL, __HIRC};
/**
* @brief Update the Variable SystemCoreClock
*
* @details This function is used to update the variable SystemCoreClock
* and must be called whenever the core clock is changed.
*/
void SystemCoreClockUpdate(void)
{
uint32_t u32Freq, u32ClkSrc;
uint32_t u32HclkDiv;
u32ClkSrc = CLK->CLKSEL0 & CLK_CLKSEL0_HCLKSEL_Msk;
/* Update PLL Clock */
PllClock = CLK_GetPLLClockFreq();
if (u32ClkSrc != CLK_CLKSEL0_HCLKSEL_PLL)
{
/* Use the clock sources directly */
u32Freq = gau32ClkSrcTbl[u32ClkSrc];
}
else
{
/* Use PLL clock */
u32Freq = PllClock;
}
u32HclkDiv = (CLK->CLKDIV0 & CLK_CLKDIV0_HCLKDIV_Msk) + 1;
/* Update System Core Clock */
SystemCoreClock = u32Freq / u32HclkDiv;
CyclesPerUs = (SystemCoreClock + 500000) / 1000000;
}
/** /**
* @brief System Initialization * @brief System Initialization
* *
@ -112,22 +74,3 @@ void AssertError(uint8_t *file, uint32_t line)
while (1) ; while (1) ;
} }
#endif #endif
/**
* @brief Set UART0 Default MPF
*
* @details The initialization of uart0 default multi function pin.
*/
#if defined( __ICCARM__ )
__WEAK
#else
__attribute__((weak))
#endif
void Uart0DefaultMPF(void)
{
/* Set GPB multi-function pins for UART0 RXD and TXD */
SYS->GPB_MFPH = (SYS->GPB_MFPH & ~SYS_GPB_MFPH_PB12MFP_Msk) | SYS_GPB_MFPH_PB12MFP_UART0_RXD;
SYS->GPB_MFPH = (SYS->GPB_MFPH & ~SYS_GPB_MFPH_PB13MFP_Msk) | SYS_GPB_MFPH_PB13MFP_UART0_TXD;
}

15
hal/m258ke/nuvoton/system_M251.h
View File

@ -47,21 +47,6 @@ extern uint32_t PllClock; /*!< PLL Output Clock Frequency */
*/ */
extern void SystemInit(void); extern void SystemInit(void);
/**
* @brief Update the Variable SystemCoreClock
*
* @details This function is used to update the variable SystemCoreClock
* and must be called whenever the core clock is changed.
*/
extern void SystemCoreClockUpdate(void);
/**
* @brief Set UART0 Default MPF
*
* @details The initialization of uart0 default multi function pin.
*/
extern void Uart0DefaultMPF(void);
/** /**
* @brief Check if debug message finished * @brief Check if debug message finished
* *