![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Color Oled(SSD1331) connect to STMicroelectronics Nucleo-F466
Diff: mbed-os/targets/TARGET_NUVOTON/TARGET_NUC472/device/system_NUC472_442.c
- Revision:
- 0:8fdf9a60065b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os/targets/TARGET_NUVOTON/TARGET_NUC472/device/system_NUC472_442.c Wed Oct 10 00:33:53 2018 +0000 @@ -0,0 +1,180 @@ +/**************************************************************************//** + * @file system_NUC472_442.c + * @version V1.00 + * $Revision: 15 $ + * $Date: 14/05/29 1:13p $ + * @brief NUC472/NUC442 system clock init code and assert handler + * + * @note + * Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved. +*****************************************************************************/ + +#include "NUC472_442.h" +//#include "rtc.h" + +/*---------------------------------------------------------------------------- + Clock Variable definitions + *----------------------------------------------------------------------------*/ +uint32_t SystemCoreClock = __HSI; /*!< System Clock Frequency (Core Clock)*/ +uint32_t CyclesPerUs = (__HSI / 1000000); /*!< Cycles per micro second */ +uint32_t gau32ClkSrcTbl[] = {__HXT, __LXT, 0, __LIRC, 0, 0, 0, __HIRC}; /*!< System clock source table */ + +#if defined TARGET_NU_XRAM_SUPPORTED +static void nu_ebi_init(void); +#endif + +/*---------------------------------------------------------------------------- + Clock functions + *----------------------------------------------------------------------------*/ +void SystemCoreClockUpdate (void) /* Get Core Clock Frequency */ +{ + uint32_t u32Freq, u32ClkSrc; + uint32_t u32HclkDiv; + + u32ClkSrc = CLK->CLKSEL0 & CLK_CLKSEL0_HCLKSEL_Msk; + + if(u32ClkSrc != CLK_CLKSEL0_HCLKSEL_PLL) { + /* Use the clock sources directly */ + u32Freq = gau32ClkSrcTbl[u32ClkSrc]; + } else { + /* Use PLL clock */ + u32Freq = CLK_GetPLLClockFreq(); + } + + u32HclkDiv = (CLK->CLKDIV0 & CLK_CLKDIV0_HCLKDIV_Msk) + 1; + + /* Update System Core Clock */ + SystemCoreClock = u32Freq/u32HclkDiv; + + CyclesPerUs = (SystemCoreClock + 500000) / 1000000; +} + +/** + * Initialize the system + * + * @return none + * + * @brief Setup the microcontroller system. + */ +void SystemInit (void) +{ + //uint32_t u32RTC_EN_Flag = 0; + + /* FPU settings ------------------------------------------------------------*/ +#if (__FPU_PRESENT == 1) && (__FPU_USED == 1) + SCB->CPACR |= ((3UL << 10*2) | /* set CP10 Full Access */ + (3UL << 11*2) ); /* set CP11 Full Access */ +#endif + + /* The code snippet below is for old-version chip and has potential risk, e.g. program reboots and hangs in it with the call to NVIC_SystemReset(). Remove it for new-version chip. */ +#if 0 + /* ------------------ Release Tamper pin ---------------------------------*/ + /* Waiting for 10kHz clock ready */ + CLK_WaitClockReady(CLK_STATUS_LIRCSTB_Msk); + + u32RTC_EN_Flag = ((CLK->APBCLK0 & CLK_APBCLK0_RTCCKEN_Msk) >> CLK_APBCLK0_RTCCKEN_Pos); + + if(!u32RTC_EN_Flag) { + CLK->APBCLK0 |= CLK_APBCLK0_RTCCKEN_Msk; // RTC Clock Enable + } + + RTC->INIT = RTC_INIT_KEY; + while(RTC->INIT != 0x1); + + if(!(RTC->TAMPCTL & RTC_TAMPCTL_TIEN_Msk)) { + RTC->RWEN = RTC_WRITE_KEY; + while(!(RTC->RWEN & RTC_RWEN_RWENF_Msk)); + + RTC->SPRCTL |= RTC_SPRCTL_SPRRWEN_Msk; + + while(!(RTC->SPRCTL & RTC_SPRCTL_SPRRWRDY_Msk)); + + RTC->RWEN = RTC_WRITE_KEY; + while(!(RTC->RWEN & RTC_RWEN_RWENF_Msk)); + + RTC->SPR[23] = RTC->SPR[23]; + while(!(RTC->SPRCTL & RTC_SPRCTL_SPRRWRDY_Msk)); + + RTC->RWEN = RTC_WRITE_KEY; + while(!(RTC->RWEN & RTC_RWEN_RWENF_Msk)); + + RTC->SPRCTL &= ~RTC_SPRCTL_SPRRWEN_Msk; + while(!(RTC->SPRCTL & RTC_SPRCTL_SPRRWRDY_Msk)); + + RTC->RWEN = RTC_WRITE_KEY; + while(!(RTC->RWEN & RTC_RWEN_RWENF_Msk)); + + RTC->INTSTS = RTC_INTSTS_TICKIF_Msk; + } + + if(!u32RTC_EN_Flag) { + CLK->APBCLK0 &= ~CLK_APBCLK0_RTCCKEN_Msk; // RTC Clock Disable + } + /*------------------------------------------------------------------------*/ +#endif + +#if defined TARGET_NU_XRAM_SUPPORTED + // NOTE: C-runtime not initialized yet. Ensure no static memory (global variable) are accessed in this function. + nu_ebi_init(); +#endif +} + +#if defined TARGET_NU_XRAM_SUPPORTED +void nu_ebi_init(void) +{ + /* Enable IP clock */ + CLK_EnableModuleClock(EBI_MODULE); + + /* Configure EBI multi-function pins */ + SYS->GPA_MFPH = (SYS->GPA_MFPH & (~SYS_GPA_MFPH_PA10MFP_Msk) ) | SYS_GPA_MFPH_PA10MFP_EBI_A20; /* A20. = PA10 */ + SYS->GPA_MFPH = (SYS->GPA_MFPH & (~SYS_GPA_MFPH_PA9MFP_Msk) ) | SYS_GPA_MFPH_PA9MFP_EBI_A19; /* A19. = PA9 */ + SYS->GPA_MFPH = (SYS->GPA_MFPH & (~SYS_GPA_MFPH_PA8MFP_Msk) ) | SYS_GPA_MFPH_PA8MFP_EBI_A18; /* A18. = PA8 */ + SYS->GPA_MFPL = (SYS->GPA_MFPL & (~SYS_GPA_MFPL_PA7MFP_Msk) ) | SYS_GPA_MFPL_PA7MFP_EBI_A17; /* A17. = PA7 */ + SYS->GPA_MFPL = (SYS->GPA_MFPL & (~SYS_GPA_MFPL_PA6MFP_Msk) ) | SYS_GPA_MFPL_PA6MFP_EBI_A16; /* A16. = PA6 */ + SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB13MFP_Msk) ) | SYS_GPB_MFPH_PB13MFP_EBI_AD15; /* AD15 = PB13 */ + + SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB12MFP_Msk) ) | SYS_GPB_MFPH_PB12MFP_EBI_AD14; /* AD14 = PB12 */ + SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB11MFP_Msk) ) | SYS_GPB_MFPH_PB11MFP_EBI_AD13; /* AD13 = PB11 */ + SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB10MFP_Msk) ) | SYS_GPB_MFPH_PB10MFP_EBI_AD12; /* AD12 = PB10 */ + SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB9MFP_Msk) ) | SYS_GPB_MFPH_PB9MFP_EBI_AD11; /* AD11 = PB9 */ + SYS->GPB_MFPH = (SYS->GPB_MFPH & (~SYS_GPB_MFPH_PB8MFP_Msk) ) | SYS_GPB_MFPH_PB8MFP_EBI_AD10; /* AD10 = PB8 */ + + SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB7MFP_Msk) ) | SYS_GPB_MFPL_PB7MFP_EBI_AD9; /* AD9 = PB7 */ + SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB6MFP_Msk) ) | SYS_GPB_MFPL_PB6MFP_EBI_AD8; /* AD8 = PB6 */ + SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB5MFP_Msk) ) | SYS_GPB_MFPL_PB5MFP_EBI_AD7; /* AD7 = PB5 */ + SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB4MFP_Msk) ) | SYS_GPB_MFPL_PB4MFP_EBI_AD6; /* AD6 = PB4 */ + SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB3MFP_Msk) ) | SYS_GPB_MFPL_PB3MFP_EBI_AD5; /* AD5 = PB3 */ + SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB2MFP_Msk) ) | SYS_GPB_MFPL_PB2MFP_EBI_AD4; /* AD4 = PB2 */ + + SYS->GPA_MFPH = (SYS->GPA_MFPH & (~SYS_GPA_MFPH_PA14MFP_Msk) ) | SYS_GPA_MFPH_PA14MFP_EBI_AD3; /* AD3. = PA14 */ + SYS->GPA_MFPH = (SYS->GPA_MFPH & (~SYS_GPA_MFPH_PA13MFP_Msk) ) | SYS_GPA_MFPH_PA13MFP_EBI_AD2; /* AD2. = PA13 */ + SYS->GPA_MFPH = (SYS->GPA_MFPH & (~SYS_GPA_MFPH_PA12MFP_Msk) ) | SYS_GPA_MFPH_PA12MFP_EBI_AD1; /* AD1. = PA12 */ + SYS->GPA_MFPH = (SYS->GPA_MFPH & (~SYS_GPA_MFPH_PA11MFP_Msk) ) | SYS_GPA_MFPH_PA11MFP_EBI_AD0; /* AD0. = PA11 */ + + SYS->GPE_MFPL = (SYS->GPE_MFPL & (~SYS_GPE_MFPL_PE6MFP_Msk) ) | SYS_GPE_MFPL_PE6MFP_EBI_nWR; /* PE.6 = nWR */ + SYS->GPE_MFPL = (SYS->GPE_MFPL & (~SYS_GPE_MFPL_PE7MFP_Msk) ) | SYS_GPE_MFPL_PE7MFP_EBI_nRD; /* PE.7 = nRD */ + SYS->GPE_MFPH = (SYS->GPE_MFPH & (~SYS_GPE_MFPH_PE8MFP_Msk) ) | SYS_GPE_MFPH_PE8MFP_EBI_ALE; /* PE.8 = ALE */ + SYS->GPE_MFPH = (SYS->GPE_MFPH & (~SYS_GPE_MFPH_PE9MFP_Msk) ) | SYS_GPE_MFPH_PE9MFP_EBI_nWRH; /* PE.9 = WRH */ + SYS->GPE_MFPH = (SYS->GPE_MFPH & (~SYS_GPE_MFPH_PE10MFP_Msk) ) | SYS_GPE_MFPH_PE10MFP_EBI_nWRL; /* PE.10 = WRL */ + + SYS->GPE_MFPH = (SYS->GPE_MFPH & (~SYS_GPE_MFPH_PE11MFP_Msk) ) | SYS_GPE_MFPH_PE11MFP_EBI_nCS0; /* PE.11 = nCS0 */ + SYS->GPE_MFPH = (SYS->GPE_MFPH & (~SYS_GPE_MFPH_PE12MFP_Msk) ) | SYS_GPE_MFPH_PE12MFP_EBI_nCS1; /* PE.12 = nCS1 */ + SYS->GPE_MFPH = (SYS->GPE_MFPH & (~SYS_GPE_MFPH_PE13MFP_Msk) ) | SYS_GPE_MFPH_PE13MFP_EBI_nCS2; /* PE.13 = nCS2 */ + SYS->GPE_MFPH = (SYS->GPE_MFPH & (~SYS_GPE_MFPH_PE14MFP_Msk) ) | SYS_GPE_MFPH_PE14MFP_EBI_nCS3; /* PE.14 = nCS3 */ + + const uint32_t u32Timing = 0x21C; + + /* Open EBI interface */ + EBI_Open(EBI_BANK0, EBI_BUSWIDTH_16BIT, EBI_TIMING_FAST, EBI_SEPARATEMODE_DISABLE, EBI_CS_ACTIVE_LOW); + EBI_Open(EBI_BANK1, EBI_BUSWIDTH_16BIT, EBI_TIMING_FAST, EBI_SEPARATEMODE_DISABLE, EBI_CS_ACTIVE_LOW); + EBI_Open(EBI_BANK2, EBI_BUSWIDTH_16BIT, EBI_TIMING_FAST, EBI_SEPARATEMODE_DISABLE, EBI_CS_ACTIVE_LOW); + EBI_Open(EBI_BANK3, EBI_BUSWIDTH_16BIT, EBI_TIMING_FAST, EBI_SEPARATEMODE_DISABLE, EBI_CS_ACTIVE_LOW); + + /* Configure EBI timing */ + EBI_SetBusTiming(EBI_BANK0, u32Timing, EBI_MCLKDIV_2); + EBI_SetBusTiming(EBI_BANK1, u32Timing, EBI_MCLKDIV_2); + EBI_SetBusTiming(EBI_BANK2, u32Timing, EBI_MCLKDIV_2); + EBI_SetBusTiming(EBI_BANK3, u32Timing, EBI_MCLKDIV_2); +} +#endif +/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/