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Diffstat (limited to 'tinyusb/hw/bsp/gd32vf103/system_gd32vf103.c')
| -rwxr-xr-x | tinyusb/hw/bsp/gd32vf103/system_gd32vf103.c | 668 |
1 files changed, 668 insertions, 0 deletions
diff --git a/tinyusb/hw/bsp/gd32vf103/system_gd32vf103.c b/tinyusb/hw/bsp/gd32vf103/system_gd32vf103.c new file mode 100755 index 00000000..29518a54 --- /dev/null +++ b/tinyusb/hw/bsp/gd32vf103/system_gd32vf103.c @@ -0,0 +1,668 @@ +/*! + \file system_gd32vf103.h +\brief RISC-V Device Peripheral Access Layer Source File for + GD32VF103 Device Series + +*/ + +/* + Copyright (c) 2020, GigaDevice Semiconductor Inc. + + Redistribution and use in source and binary forms, with or without modification, +are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + 3. Neither the name of the copyright holder nor the names of its contributors + may be used to endorse or promote products derived from this software without + specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. +IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, +INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, +WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY +OF SUCH DAMAGE. +*/ + +/* This file refers the RISC-V standard, some adjustments are made according to GigaDevice chips */ +#include "board.h" + +/* system frequency define */ +#define __IRC8M (IRC8M_VALUE) /* internal 8 MHz RC oscillator frequency */ +#define __HXTAL (HXTAL_VALUE) /* high speed crystal oscillator frequency */ +#define __SYS_OSC_CLK (__IRC8M) /* main oscillator frequency */ +#define __SYSTEM_CLOCK_HXTAL (HXTAL_VALUE) + +#if !defined(__SYSTEM_CLOCK) +#define __SYSTEM_CLOCK 72000000 +#endif + +#if __SYSTEM_CLOCK == 48000000 + #define __SYSTEM_CLOCK_48M_PLL_HXTAL (uint32_t)(48000000) + uint32_t SystemCoreClock = __SYSTEM_CLOCK_48M_PLL_HXTAL; + static void system_clock_48m_hxtal(void); + +#elif __SYSTEM_CLOCK == 72000000 + #define __SYSTEM_CLOCK_72M_PLL_HXTAL (uint32_t)(72000000) + uint32_t SystemCoreClock = __SYSTEM_CLOCK_72M_PLL_HXTAL; + static void system_clock_72m_hxtal(void); + +#elif __SYSTEM_CLOCK == 96000000 + #define __SYSTEM_CLOCK_96M_PLL_HXTAL (uint32_t)(96000000) + uint32_t SystemCoreClock = __SYSTEM_CLOCK_96M_PLL_HXTAL; + static void system_clock_96m_hxtal(void); + +#else +#error No valid system clock configuration set! +#endif + +/* configure the system clock */ +static void system_clock_config(void); + +/*! + \brief configure the system clock + \param[in] none + \param[out] none + \retval none +*/ +static void system_clock_config(void) +{ +#if defined (__SYSTEM_CLOCK_48M_PLL_HXTAL) + system_clock_48m_hxtal(); +#elif defined (__SYSTEM_CLOCK_72M_PLL_HXTAL) + system_clock_72m_hxtal(); +#elif defined (__SYSTEM_CLOCK_96M_PLL_HXTAL) + system_clock_96m_hxtal(); +#endif /* __SYSTEM_CLOCK_HXTAL */ +} + +/*! + \brief setup the microcontroller system, initialize the system + \param[in] none + \param[out] none + \retval none +*/ +void SystemInit(void) +{ + /* reset the RCC clock configuration to the default reset state */ + /* enable IRC8M */ + RCU_CTL |= RCU_CTL_IRC8MEN; + + /* reset SCS, AHBPSC, APB1PSC, APB2PSC, ADCPSC, CKOUT0SEL bits */ + RCU_CFG0 &= ~(RCU_CFG0_SCS | RCU_CFG0_AHBPSC | RCU_CFG0_APB1PSC | RCU_CFG0_APB2PSC | + RCU_CFG0_ADCPSC | RCU_CFG0_ADCPSC_2 | RCU_CFG0_CKOUT0SEL); + + /* reset HXTALEN, CKMEN, PLLEN bits */ + RCU_CTL &= ~(RCU_CTL_HXTALEN | RCU_CTL_CKMEN | RCU_CTL_PLLEN); + + /* Reset HXTALBPS bit */ + RCU_CTL &= ~(RCU_CTL_HXTALBPS); + + /* reset PLLSEL, PREDV0_LSB, PLLMF, USBFSPSC bits */ + + RCU_CFG0 &= ~(RCU_CFG0_PLLSEL | RCU_CFG0_PREDV0_LSB | RCU_CFG0_PLLMF | + RCU_CFG0_USBFSPSC | RCU_CFG0_PLLMF_4); + RCU_CFG1 = 0x00000000U; + + /* Reset HXTALEN, CKMEN, PLLEN, PLL1EN and PLL2EN bits */ + RCU_CTL &= ~(RCU_CTL_PLLEN | RCU_CTL_PLL1EN | RCU_CTL_PLL2EN | RCU_CTL_CKMEN | RCU_CTL_HXTALEN); + /* disable all interrupts */ + RCU_INT = 0x00FF0000U; + + /* Configure the System clock source, PLL Multiplier, AHB/APBx prescalers and Flash settings */ + system_clock_config(); +} + +/*! + \brief update the SystemCoreClock with current core clock retrieved from cpu registers + \param[in] none + \param[out] none + \retval none +*/ +void SystemCoreClockUpdate(void) +{ + uint32_t scss; + uint32_t pllsel, predv0sel, pllmf, ck_src; + uint32_t predv0, predv1, pll1mf; + + scss = GET_BITS(RCU_CFG0, 2, 3); + + switch (scss) + { + /* IRC8M is selected as CK_SYS */ + case SEL_IRC8M: + SystemCoreClock = IRC8M_VALUE; + break; + + /* HXTAL is selected as CK_SYS */ + case SEL_HXTAL: + SystemCoreClock = HXTAL_VALUE; + break; + + /* PLL is selected as CK_SYS */ + case SEL_PLL: + /* PLL clock source selection, HXTAL or IRC8M/2 */ + pllsel = (RCU_CFG0 & RCU_CFG0_PLLSEL); + + + if(RCU_PLLSRC_IRC8M_DIV2 == pllsel){ + /* PLL clock source is IRC8M/2 */ + ck_src = IRC8M_VALUE / 2U; + }else{ + /* PLL clock source is HXTAL */ + ck_src = HXTAL_VALUE; + + predv0sel = (RCU_CFG1 & RCU_CFG1_PREDV0SEL); + + /* source clock use PLL1 */ + if(RCU_PREDV0SRC_CKPLL1 == predv0sel){ + predv1 = ((RCU_CFG1 & RCU_CFG1_PREDV1) >> 4) + 1U; + pll1mf = ((RCU_CFG1 & RCU_CFG1_PLL1MF) >> 8) + 2U; + if(17U == pll1mf){ + pll1mf = 20U; + } + ck_src = (ck_src / predv1) * pll1mf; + } + predv0 = (RCU_CFG1 & RCU_CFG1_PREDV0) + 1U; + ck_src /= predv0; + } + + /* PLL multiplication factor */ + pllmf = GET_BITS(RCU_CFG0, 18, 21); + + if((RCU_CFG0 & RCU_CFG0_PLLMF_4)){ + pllmf |= 0x10U; + } + + if(pllmf >= 15U){ + pllmf += 1U; + }else{ + pllmf += 2U; + } + + SystemCoreClock = ck_src * pllmf; + + if(15U == pllmf){ + /* PLL source clock multiply by 6.5 */ + SystemCoreClock = ck_src * 6U + ck_src / 2U; + } + + break; + + /* IRC8M is selected as CK_SYS */ + default: + SystemCoreClock = IRC8M_VALUE; + break; + } +} + +#if defined (__SYSTEM_CLOCK_48M_PLL_HXTAL) +/*! + \brief configure the system clock to 48M by PLL which selects HXTAL(MD/HD/XD:8M; CL:25M) as its clock source + \param[in] none + \param[out] none + \retval none +*/ +static void system_clock_48m_hxtal(void) +{ + uint32_t timeout = 0U; + uint32_t stab_flag = 0U; + + /* enable HXTAL */ + RCU_CTL |= RCU_CTL_HXTALEN; + + /* wait until HXTAL is stable or the startup time is longer than HXTAL_STARTUP_TIMEOUT */ + do{ + timeout++; + stab_flag = (RCU_CTL & RCU_CTL_HXTALSTB); + }while((0U == stab_flag) && (HXTAL_STARTUP_TIMEOUT != timeout)); + + /* if fail */ + if(0U == (RCU_CTL & RCU_CTL_HXTALSTB)){ + while(1){ + } + } + + /* HXTAL is stable */ + /* AHB = SYSCLK */ + RCU_CFG0 |= RCU_AHB_CKSYS_DIV1; + /* APB2 = AHB/1 */ + RCU_CFG0 |= RCU_APB2_CKAHB_DIV1; + /* APB1 = AHB/2 */ + RCU_CFG0 |= RCU_APB1_CKAHB_DIV2; + + /* CK_PLL = (CK_PREDIV0) * 12 = 48 MHz */ + RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4); + RCU_CFG0 |= (RCU_PLLSRC_HXTAL | RCU_PLL_MUL12); + + if(HXTAL_VALUE==25000000){ + + /* CK_PREDIV0 = (CK_HXTAL)/5 *8 /10 = 4 MHz */ + RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV1 | RCU_CFG1_PREDV0); + RCU_CFG1 |= (RCU_PREDV0SRC_CKPLL1 | RCU_PLL1_MUL8 | RCU_PREDV1_DIV5 | RCU_PREDV0_DIV10); + + /* enable PLL1 */ + RCU_CTL |= RCU_CTL_PLL1EN; + /* wait till PLL1 is ready */ + while((RCU_CTL & RCU_CTL_PLL1STB) == 0){ + } + + }else if(HXTAL_VALUE==8000000){ + RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PREDV1 | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV0); + RCU_CFG1 |= (RCU_PREDV0SRC_HXTAL | RCU_PREDV0_DIV2 ); + } + + + + /* enable PLL */ + RCU_CTL |= RCU_CTL_PLLEN; + + /* wait until PLL is stable */ + while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){ + } + + /* select PLL as system clock */ + RCU_CFG0 &= ~RCU_CFG0_SCS; + RCU_CFG0 |= RCU_CKSYSSRC_PLL; + + /* wait until PLL is selected as system clock */ + while(0U == (RCU_CFG0 & RCU_SCSS_PLL)){ + } +} + +#elif defined (__SYSTEM_CLOCK_72M_PLL_HXTAL) +/*! + \brief configure the system clock to 72M by PLL which selects HXTAL(MD/HD/XD:8M; CL:25M) as its clock source + \param[in] none + \param[out] none + \retval none +*/ +static void system_clock_72m_hxtal(void) +{ + uint32_t timeout = 0U; + uint32_t stab_flag = 0U; + + /* enable HXTAL */ + RCU_CTL |= RCU_CTL_HXTALEN; + + /* wait until HXTAL is stable or the startup time is longer than HXTAL_STARTUP_TIMEOUT */ + do{ + timeout++; + stab_flag = (RCU_CTL & RCU_CTL_HXTALSTB); + }while((0U == stab_flag) && (HXTAL_STARTUP_TIMEOUT != timeout)); + + /* if fail */ + if(0U == (RCU_CTL & RCU_CTL_HXTALSTB)){ + while(1){ + } + } + + /* HXTAL is stable */ + /* AHB = SYSCLK */ + RCU_CFG0 |= RCU_AHB_CKSYS_DIV1; + /* APB2 = AHB/1 */ + RCU_CFG0 |= RCU_APB2_CKAHB_DIV1; + /* APB1 = AHB/2 */ + RCU_CFG0 |= RCU_APB1_CKAHB_DIV2; + + /* CK_PLL = (CK_PREDIV0) * 18 = 72 MHz */ + RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4); + RCU_CFG0 |= (RCU_PLLSRC_HXTAL | RCU_PLL_MUL18); + + + if(HXTAL_VALUE==25000000){ + + /* CK_PREDIV0 = (CK_HXTAL)/5 *8 /10 = 4 MHz */ + RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV1 | RCU_CFG1_PREDV0); + RCU_CFG1 |= (RCU_PREDV0SRC_CKPLL1 | RCU_PLL1_MUL8 | RCU_PREDV1_DIV5 | RCU_PREDV0_DIV10); + + /* enable PLL1 */ + RCU_CTL |= RCU_CTL_PLL1EN; + /* wait till PLL1 is ready */ + while((RCU_CTL & RCU_CTL_PLL1STB) == 0){ + } + + }else if(HXTAL_VALUE==8000000){ + RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PREDV1 | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV0); + RCU_CFG1 |= (RCU_PREDV0SRC_HXTAL | RCU_PREDV0_DIV2 ); + } + + /* enable PLL */ + RCU_CTL |= RCU_CTL_PLLEN; + + /* wait until PLL is stable */ + while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){ + } + + /* select PLL as system clock */ + RCU_CFG0 &= ~RCU_CFG0_SCS; + RCU_CFG0 |= RCU_CKSYSSRC_PLL; + + /* wait until PLL is selected as system clock */ + while(0U == (RCU_CFG0 & RCU_SCSS_PLL)){ + } +} + +#elif defined (__SYSTEM_CLOCK_96M_PLL_HXTAL) +/*! + \brief configure the system clock to 96M by PLL which selects HXTAL(MD/HD/XD:8M; CL:25M) as its clock source + \param[in] none + \param[out] none + \retval none +*/ +static void system_clock_96m_hxtal(void) +{ + uint32_t timeout = 0U; + uint32_t stab_flag = 0U; + + /* enable HXTAL */ + RCU_CTL |= RCU_CTL_HXTALEN; + + /* wait until HXTAL is stable or the startup time is longer than HXTAL_STARTUP_TIMEOUT */ + do{ + timeout++; + stab_flag = (RCU_CTL & RCU_CTL_HXTALSTB); + }while((0U == stab_flag) && (HXTAL_STARTUP_TIMEOUT != timeout)); + + /* if fail */ + if(0U == (RCU_CTL & RCU_CTL_HXTALSTB)){ + while(1){ + } + } + + /* HXTAL is stable */ + /* AHB = SYSCLK */ + RCU_CFG0 |= RCU_AHB_CKSYS_DIV1; + /* APB2 = AHB/1 */ + RCU_CFG0 |= RCU_APB2_CKAHB_DIV1; + /* APB1 = AHB/2 */ + RCU_CFG0 |= RCU_APB1_CKAHB_DIV2; + + if(HXTAL_VALUE==25000000){ + + /* CK_PLL = (CK_PREDIV0) * 24 = 96 MHz */ + RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4); + RCU_CFG0 |= (RCU_PLLSRC_HXTAL | RCU_PLL_MUL24); + + /* CK_PREDIV0 = (CK_HXTAL)/5 *8 /10 = 4 MHz */ + RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV1 | RCU_CFG1_PREDV0); + RCU_CFG1 |= (RCU_PREDV0SRC_CKPLL1 | RCU_PLL1_MUL8 | RCU_PREDV1_DIV5 | RCU_PREDV0_DIV10); + /* enable PLL1 */ + RCU_CTL |= RCU_CTL_PLL1EN; + /* wait till PLL1 is ready */ + while((RCU_CTL & RCU_CTL_PLL1STB) == 0){ + } + + }else if(HXTAL_VALUE==8000000){ + /* CK_PLL = (CK_PREDIV0) * 24 = 96 MHz */ + RCU_CFG0 &= ~(RCU_CFG0_PLLMF | RCU_CFG0_PLLMF_4); + RCU_CFG0 |= (RCU_PLLSRC_HXTAL | RCU_PLL_MUL24); + + RCU_CFG1 &= ~(RCU_CFG1_PREDV0SEL | RCU_CFG1_PREDV1 | RCU_CFG1_PLL1MF | RCU_CFG1_PREDV0); + RCU_CFG1 |= (RCU_PREDV0SRC_HXTAL | RCU_PREDV0_DIV2 ); + } + + /* enable PLL */ + RCU_CTL |= RCU_CTL_PLLEN; + + /* wait until PLL is stable */ + while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){ + } + + /* select PLL as system clock */ + RCU_CFG0 &= ~RCU_CFG0_SCS; + RCU_CFG0 |= RCU_CKSYSSRC_PLL; + + /* wait until PLL is selected as system clock */ + while(0U == (RCU_CFG0 & RCU_SCSS_PLL)){ + } +} + +#endif + +/** + * \defgroup NMSIS_Core_IntExcNMI_Handling Interrupt and Exception and NMI Handling + * \brief Functions for interrupt, exception and nmi handle available in system_<device>.c. + * \details + * Nuclei provide a template for interrupt, exception and NMI handling. Silicon Vendor could adapat according + * to their requirement. Silicon vendor could implement interface for different exception code and + * replace current implementation. + * + * @{ + */ +/** \brief Max exception handler number, don't include the NMI(0xFFF) one */ +#define MAX_SYSTEM_EXCEPTION_NUM 12 +/** + * \brief Store the exception handlers for each exception ID + * \note + * - This SystemExceptionHandlers are used to store all the handlers for all + * the exception codes Nuclei N/NX core provided. + * - Exception code 0 - 11, totally 12 exceptions are mapped to SystemExceptionHandlers[0:11] + * - Exception for NMI is also re-routed to exception handling(exception code 0xFFF) in startup code configuration, the handler itself is mapped to SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM] + */ +static unsigned long SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM + 1]; + +/** + * \brief Exception Handler Function Typedef + * \note + * This typedef is only used internal in this system_gd32vf103.c file. + * It is used to do type conversion for registered exception handler before calling it. + */ +typedef void (*EXC_HANDLER)(unsigned long mcause, unsigned long sp); + +/** + * \brief System Default Exception Handler + * \details + * This function provided a default exception and NMI handling code for all exception ids. + * By default, It will just print some information for debug, Vendor can customize it according to its requirements. + */ +static void system_default_exception_handler(unsigned long mcause, unsigned long sp) +{ + /* TODO: Uncomment this if you have implement printf function */ + /*printf("MCAUSE: 0x%lx\r\n", mcause); + printf("MEPC : 0x%lx\r\n", __RV_CSR_READ(CSR_MEPC)); + printf("MTVAL : 0x%lx\r\n", __RV_CSR_READ(CSR_MBADADDR));*/ + while (1); +} + +/** + * \brief Initialize all the default core exception handlers + * \details + * The core exception handler for each exception id will be initialized to \ref system_default_exception_handler. + * \note + * Called in \ref _init function, used to initialize default exception handlers for all exception IDs + */ +static void Exception_Init(void) +{ + for (int i = 0; i < MAX_SYSTEM_EXCEPTION_NUM + 1; i++) { + SystemExceptionHandlers[i] = (unsigned long)system_default_exception_handler; + } +} + +/** + * \brief Register an exception handler for exception code EXCn + * \details + * * For EXCn < \ref MAX_SYSTEM_EXCEPTION_NUM, it will be registered into SystemExceptionHandlers[EXCn-1]. + * * For EXCn == NMI_EXCn, it will be registered into SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM]. + * \param EXCn See \ref EXCn_Type + * \param exc_handler The exception handler for this exception code EXCn + */ +void Exception_Register_EXC(uint32_t EXCn, unsigned long exc_handler) +{ + if ((EXCn < MAX_SYSTEM_EXCEPTION_NUM) && (EXCn != 0)) { + SystemExceptionHandlers[EXCn] = exc_handler; + } else if (EXCn == NMI_EXCn) { + SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM] = exc_handler; + } +} + +/** + * \brief Get current exception handler for exception code EXCn + * \details + * * For EXCn < \ref MAX_SYSTEM_EXCEPTION_NUM, it will return SystemExceptionHandlers[EXCn-1]. + * * For EXCn == NMI_EXCn, it will return SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM]. + * \param EXCn See \ref EXCn_Type + * \return Current exception handler for exception code EXCn, if not found, return 0. + */ +unsigned long Exception_Get_EXC(uint32_t EXCn) +{ + if ((EXCn < MAX_SYSTEM_EXCEPTION_NUM) && (EXCn != 0)) { + return SystemExceptionHandlers[EXCn]; + } else if (EXCn == NMI_EXCn) { + return SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM]; + } else { + return 0; + } +} + +/** + * \brief Common NMI and Exception handler entry + * \details + * This function provided a command entry for NMI and exception. Silicon Vendor could modify + * this template implementation according to requirement. + * \remarks + * - RISCV provided common entry for all types of exception. This is proposed code template + * for exception entry function, Silicon Vendor could modify the implementation. + * - For the core_exception_handler template, we provided exception register function \ref Exception_Register_EXC + * which can help developer to register your exception handler for specific exception number. + */ +uint32_t core_exception_handler(unsigned long mcause, unsigned long sp) +{ + uint32_t EXCn = (uint32_t)(mcause & 0X00000fff); + EXC_HANDLER exc_handler; + + if ((EXCn < MAX_SYSTEM_EXCEPTION_NUM) && (EXCn > 0)) { + exc_handler = (EXC_HANDLER)SystemExceptionHandlers[EXCn]; + } else if (EXCn == NMI_EXCn) { + exc_handler = (EXC_HANDLER)SystemExceptionHandlers[MAX_SYSTEM_EXCEPTION_NUM]; + } else { + exc_handler = (EXC_HANDLER)system_default_exception_handler; + } + if (exc_handler != NULL) { + exc_handler(mcause, sp); + } + return 0; +} +/** @} */ /* End of Doxygen Group NMSIS_Core_ExceptionAndNMI */ + +/** + * \brief initialize eclic config + * \details + * Eclic need initialize after boot up, Vendor could also change the initialization + * configuration. + */ +void ECLIC_Init(void) +{ + /* TODO: Add your own initialization code here. This function will be called by main */ + ECLIC_SetMth(0); + ECLIC_SetCfgNlbits(__ECLIC_INTCTLBITS); +} + +/** + * \brief Initialize a specific IRQ and register the handler + * \details + * This function set vector mode, trigger mode and polarity, interrupt level and priority, + * assign handler for specific IRQn. + * \param [in] IRQn NMI interrupt handler address + * \param [in] shv \ref ECLIC_NON_VECTOR_INTERRUPT means non-vector mode, and \ref ECLIC_VECTOR_INTERRUPT is vector mode + * \param [in] trig_mode see \ref ECLIC_TRIGGER_Type + * \param [in] lvl interupt level + * \param [in] priority interrupt priority + * \param [in] handler interrupt handler, if NULL, handler will not be installed + * \return -1 means invalid input parameter. 0 means successful. + * \remarks + * - This function use to configure specific eclic interrupt and register its interrupt handler and enable its interrupt. + * - If the vector table is placed in read-only section(FLASHXIP mode), handler could not be installed + */ +int32_t ECLIC_Register_IRQ(IRQn_Type IRQn, uint8_t shv, ECLIC_TRIGGER_Type trig_mode, uint8_t lvl, uint8_t priority, void* handler) +{ + if ((IRQn > SOC_INT_MAX) || (shv > ECLIC_VECTOR_INTERRUPT) \ + || (trig_mode > ECLIC_NEGTIVE_EDGE_TRIGGER)) { + return -1; + } + + /* set interrupt vector mode */ + ECLIC_SetShvIRQ(IRQn, shv); + /* set interrupt trigger mode and polarity */ + ECLIC_SetTrigIRQ(IRQn, trig_mode); + /* set interrupt level */ + ECLIC_SetLevelIRQ(IRQn, lvl); + /* set interrupt priority */ + ECLIC_SetPriorityIRQ(IRQn, priority); + if (handler != NULL) { + /* set interrupt handler entry to vector table */ + ECLIC_SetVector(IRQn, (rv_csr_t)handler); + } + /* enable interrupt */ + ECLIC_EnableIRQ(IRQn); + return 0; +} +/** @} */ /* End of Doxygen Group NMSIS_Core_ExceptionAndNMI */ + +/** + * \brief early init function before main + * \details + * This function is executed right before main function. + * For RISC-V gnu toolchain, _init function might not be called + * by __libc_init_array function, so we defined a new function + * to do initialization + */ +void _premain_init(void) +{ + /* Initialize exception default handlers */ + Exception_Init(); + /* ECLIC initialization, mainly MTH and NLBIT */ + ECLIC_Init(); +} + +/** + * \brief finish function after main + * \param [in] status status code return from main + * \details + * This function is executed right after main function. + * For RISC-V gnu toolchain, _fini function might not be called + * by __libc_fini_array function, so we defined a new function + * to do initialization + */ +void _postmain_fini(int status) +{ + /* TODO: Add your own finishing code here, called after main */ +} + +/** + * \brief _init function called in __libc_init_array() + * \details + * This `__libc_init_array()` function is called during startup code, + * user need to implement this function, otherwise when link it will + * error init.c:(.text.__libc_init_array+0x26): undefined reference to `_init' + * \note + * Please use \ref _premain_init function now + */ +void _init(void) +{ + /* Don't put any code here, please use _premain_init now */ +} + +/** + * \brief _fini function called in __libc_fini_array() + * \details + * This `__libc_fini_array()` function is called when exit main. + * user need to implement this function, otherwise when link it will + * error fini.c:(.text.__libc_fini_array+0x28): undefined reference to `_fini' + * \note + * Please use \ref _postmain_fini function now + */ +void _fini(void) +{ + /* Don't put any code here, please use _postmain_fini now */ +} + +/** @} */ /* End of Doxygen Group NMSIS_Core_SystemAndClock */ |