GD32F450 串口1 DMA收发
时间：2022-11-07 21:30:00
Uart1_F450.cpp
#include "UART1_F450.hpp" #include "main.h" #define USART1_DATA_ADDRESS ((uint32_t)&USART_DATA(USART1)) void UART1_F450::Init(uint32_t baud) { /* initialize clock */ rcu_periph_clock_enable(RCU_DMA0); rcu_periph_clock_enable(RCU_USART1); rcu_periph_clock_enable(RCU_GPIOD); /* initialize port */ gpio_af_set(GPIOD, GPIO_AF_7, GPIO_PIN_5|GPIO_PIN_6); gpio_mode_set(GPIOD, GPIO_MODE_AF, GPIO_PUPD_PULLUP,GPIO_PIN_5|GPIO_PIN_6); gpio_output_options_set(GPIOD, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN_5|GPIO_PIN_6); /* USART configure */ usart_deinit(USART1); usart_oversample_config(USART1, USART_OVSMOD_8); usart_baudrate_set(USART1,baud); //波特率 usart_parity_config(USART1, USART_PM_NONE); ///校验位：NONE usart_word_length_set(USART1, USART_WL_8BIT); //数据位：8 usart_stop_bit_set(USART1, USART_STB_1BIT); //停止位：1 usart_receive_config(USART1, USART_RECEIVE_ENABLE); usart_transmit_config(USART1, USART_TRANSMIT_ENABLE); /* enable USART0 IDLEIE interrupt */ usart_interrupt_enable(USART1, USART_INT_IDLE); /* USART interrupt configuration */ nvic_irq_enable(USART1_IRQn, 1, 1); usart_enable(USART1); /* USART DMA enable*/ usart_dma_receive_config(USART1, USART_DENR_ENABLE); usart_dma_transmit_config(USART1, USART_DENT_ENABLE); /*configure DMA0 interrupt*/ nvic_irq_enable(DMA0_Channel6_IRQn, 0, 0); nvic_irq_enable(DMA0_Channel5_IRQn, 0, 1); dma_single_data_parameter_struct dma_init_struct; /* deinitialize DMA1 channel7(USART0 tx) */ dma_single_data_para_struct_init(&dma_init_struct); dma_deinit(DMA0, DMA_CH6); dma_init_struct.direction = DMA_MEMORY_TO_PERIPH; dma_init_struct.memory0_addr = (uint32_t)0; dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE; dma_init_struct.periph_memory_width = DMA_PERIPH_WIDTH_8BIT; dma_init_struct.number = 0; dma_init_struct.periph_addr = USART1_DATA_ADDRESS; dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE; dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH; dma_single_data_mode_init(DMA0, DMA_CH6, &dma_init_struct); /* configure DMA mode */ dma_circulation_disable(DMA0, DMA_CH6); dma_channel_subperipheral_select(DMA0, DMA_CH6, DMA_SUBPERI4); /* enable DMA1 channel7 transfer complete interrupt */ dma_interrupt_enable(DMA0, DMA_CH6, DMA_CHXCTL_FTFIE); /* enable DMA1 channel7 */ dma_channel_enable(DMA0, DMA_CH6); /* deinitialize DMA1 channel2 (USART0 rx) */ dma_deinit(DMA0, DMA_CH5); dma_init_struct.direction = DMA_PERIPH_TO_MEMORY; dma_init_struct.memory0_addr = (uint32_t)RxBuf; dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE; dma_init_struct.number = 128; dma_init_struct.periph_addr = (uint32_t)&USART_DATA(USART1); dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE; dma_init_struct.periph_memory_width = DMA_PERIPH_WIDTH_8BIT; dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH; dma_single_data_mode_init(DMA0, DMA_CH5, &dma_init_struct); /* configure DMA mode */ dma_circulation_disable(DMA0, DMA_CH5); dma_channel_subperipheral_select(DMA0, DMA_CH5, DMA_SUBPERI4); /* enable DMA1 channel2 transfer complete interrupt */ dma_interrupt_enable(DMA0, DMA_CH5, DMA_CHXCTL_FTFIE); /* enable DMA1 channel2 */ dma_channel_enable(DMA0, DMA_CH5); } uint8_t UART1_F450::Write(uint8_t *buf, uint16_t len) { dma_single_data_parameter_struct dma_init_struct; dma_single_data_para_struct_init(&dma_init_struct); dma_deinit(DMA0, DMA_CH6); dma_init_struct.direction = DMA_MEMORY_TO_PERIPH; dma_init_struct.memory0_addr = (uint32_t)buf; dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE; dma_init_struct.periph_memory_width = DMA_PERIPH_WIDTH_8BIT; dma_init_struct.number = len; dma_init_struct.periph_addr = USART1_DATA_ADDRESS; dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE; dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH; dma_single_data_mode_init(DMA0, DMA_CH6, &dma_init_struct); dma_channel_subperipheral_select(DMA0, DMA_CH6, DMA_SUBPERI4); dma_channel_enable(DMA0, DMA_CH6); while(!dma_flag_get(DMA0,DMA_CH6,DMA_FLAG_FTF)); } uint16_t UART1_F450::GetRxLenth(void) { return 128 - dma_transfer_number_get(DMA0, DMA_CH5); } void UART1_F450::ReadResume(void) { dma_single_data_parameter_struct dma_init_struct; /* deinitialize DMA channel2 (USART0 rx) */ dma_deinit(DMA0, DMA_CH5); dma_init_struct.direction = DMA_PERIPH_TO_MEMORY; dma_init_struct.memory0_addr = (uint32_t)RxBuf; dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE; dma_init_struct.number = 128; dma_init_struct.periph_addr = (uint32_t)&USART_DATA(USART1); dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE; dma_init_struct.periph_memory_width = DMA_PERIPH_WIDTH_8BIT; dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH; dma_single_data_mode_init(DMA0, DMA_CH5, &dma_init_struct); /* configur DMA mode */
dma_circulation_disable(DMA0, DMA_CH5);
dma_channel_subperipheral_select(DMA0, DMA_CH5, DMA_SUBPERI4);
/* enable DMA channel2 */
dma_channel_enable(DMA0, DMA_CH5);
}
void UART1_F450::Read(uint8_t *buf, uint16_t *len)
{
*len = 128 - dma_transfer_number_get(DMA0, DMA_CH5);
if(*len > 0)
{
for(int i = 0; i < *len; i++)
{
buf[i] = RxBuf[i];
}
dma_single_data_parameter_struct dma_init_struct;
/* deinitialize DMA channel2 (USART0 rx) */
dma_deinit(DMA0, DMA_CH5);
dma_init_struct.direction = DMA_PERIPH_TO_MEMORY;
dma_init_struct.memory0_addr = (uint32_t)RxBuf;
dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
dma_init_struct.number = 128;
dma_init_struct.periph_addr = (uint32_t)&USART_DATA(USART1);
dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_init_struct.periph_memory_width = DMA_PERIPH_WIDTH_8BIT;
dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
dma_single_data_mode_init(DMA0, DMA_CH5, &dma_init_struct);
/* configure DMA mode */
dma_circulation_disable(DMA0, DMA_CH5);
dma_channel_subperipheral_select(DMA0, DMA_CH5, DMA_SUBPERI4);
/* enable DMA channel2 */
dma_channel_enable(DMA0, DMA_CH5);
}
}
void UART1_F450::Write(uint16_t len)
{
dma_single_data_parameter_struct dma_init_struct;
dma_single_data_para_struct_init(&dma_init_struct);
dma_deinit(DMA0, DMA_CH6);
dma_init_struct.direction = DMA_MEMORY_TO_PERIPH;
dma_init_struct.memory0_addr = (uint32_t)TxBuf;
dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
dma_init_struct.periph_memory_width = DMA_PERIPH_WIDTH_8BIT;
dma_init_struct.number = len;
dma_init_struct.periph_addr = USART1_DATA_ADDRESS;
dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
dma_single_data_mode_init(DMA0, DMA_CH6, &dma_init_struct);
dma_channel_enable(DMA0, DMA_CH6);
while(RESET == dma_flag_get(DMA0, DMA_CH6, DMA_FLAG_FTF));
}
int16_t UART1_F450::Read(void)
{
return 1;
}
UART1_F450.hpp
#pragma once
#include
#include "Bsp/bsp.hpp"
class UART1_F450: public UART
{
public:
UART1_F450(){}
void Init(uint32_t baud = 115200);
uint8_t Write(uint8_t *buf, uint16_t len);
void Read(uint8_t *buf, uint16_t *len);
void Write(uint16_t len);
void ReadResume(void);
int16_t Read(void);
uint16_t GetRxLenth(void);
};
UART
#pragma once
#include
class UART
{
public:
UART(){}
virtual void Init(uint32_t baud = 115200){}
virtual uint8_t Write(uint8_t *buf, uint16_t len){return 0;}
virtual void Read(uint8_t *buf, uint16_t *len){}
virtual void Write(uint16_t len){}
virtual int16_t Read(void){return 0;}
virtual uint16_t GetRxLenth(void){return 0;}
virtual void ReadResume(void){}
uint16_t rx_Length;
uint8_t RxBuf[128];
uint8_t TxBuf[128];
};
时钟配置：
/*!
\file system_gd32f4xx.c
\brief CMSIS Cortex-M4 Device Peripheral Access Layer Source File for
GD32F4xx Device Series
*/
/* Copyright (c) 2012 ARM LIMITED
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- 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.
- Neither the name of ARM 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 COPYRIGHT HOLDERS AND 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 CMSIS standard, some adjustments are made according to GigaDevice chips */
#include "gd32f4xx.h"
/* system frequency define */
#define __IRC16M (IRC16M_VALUE) /* internal 16 MHz RC oscillator frequency */
#define __HXTAL (HXTAL_VALUE) /* high speed crystal oscillator frequency */
#define __SYS_OSC_CLK (__HXTAL) /* main oscillator frequency */
/* select a system clock by uncommenting the following line */
//#define __SYSTEM_CLOCK_IRC16M (uint32_t)(__IRC16M)
//#define __SYSTEM_CLOCK_HXTAL (uint32_t)(__HXTAL)
//#define __SYSTEM_CLOCK_120M_PLL_IRC16M (uint32_t)(120000000)
//#define __SYSTEM_CLOCK_120M_PLL_8M_HXTAL (uint32_t)(120000000)
//#define __SYSTEM_CLOCK_120M_PLL_25M_HXTAL (uint32_t)(120000000)
//#define __SYSTEM_CLOCK_168M_PLL_IRC16M (uint32_t)(168000000)
//#define __SYSTEM_CLOCK_168M_PLL_8M_HXTAL (uint32_t)(168000000)
//#define __SYSTEM_CLOCK_168M_PLL_25M_HXTAL (uint32_t)(168000000)
//#define __SYSTEM_CLOCK_200M_PLL_IRC16M (uint32_t)(200000000)
#define __SYSTEM_CLOCK_200M_PLL_8M_HXTAL (uint32_t)(200000000)
//#define __SYSTEM_CLOCK_200M_PLL_25M_HXTAL (uint32_t)(200000000)
#define SEL_IRC16M 0x00U
#define SEL_HXTAL 0x01U
#define SEL_PLLP 0x02U
#define RCU_MODIFY {volatile uint32_t i; \
RCU_CFG0 |= RCU_AHB_CKSYS_DIV2; \
for(i=0;i<50000;i++); \
RCU_CFG0 |= RCU_AHB_CKSYS_DIV4; \
for(i=0;i<50000;i++);}
/* set the system clock frequency and declare the system clock configuration function */
#ifdef __SYSTEM_CLOCK_IRC16M
uint32_t SystemCoreClock = __SYSTEM_CLOCK_IRC16M;
static void system_clock_16m_irc16m(void);
#elif defined (__SYSTEM_CLOCK_HXTAL)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_HXTAL;
static void system_clock_hxtal(void);
#elif defined (__SYSTEM_CLOCK_120M_PLL_IRC16M)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_120M_PLL_IRC16M;
static void system_clock_120m_irc16m(void);
#elif defined (__SYSTEM_CLOCK_120M_PLL_8M_HXTAL)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_120M_PLL_8M_HXTAL;
static void system_clock_120m_8m_hxtal(void);
#elif defined (__SYSTEM_CLOCK_120M_PLL_25M_HXTAL)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_120M_PLL_25M_HXTAL;
static void system_clock_120m_25m_hxtal(void);
#elif defined (__SYSTEM_CLOCK_168M_PLL_IRC16M)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_168M_PLL_IRC16M;
static void system_clock_168m_irc16m(void);
#elif defined (__SYSTEM_CLOCK_168M_PLL_8M_HXTAL)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_168M_PLL_8M_HXTAL;
static void system_clock_168m_8m_hxtal(void);
#elif defined (__SYSTEM_CLOCK_168M_PLL_25M_HXTAL)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_168M_PLL_25M_HXTAL;
static void system_clock_168m_25m_hxtal(void);
#elif defined (__SYSTEM_CLOCK_200M_PLL_IRC16M)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_200M_PLL_IRC16M;
static void system_clock_200m_irc16m(void);
#elif defined (__SYSTEM_CLOCK_200M_PLL_8M_HXTAL)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_200M_PLL_8M_HXTAL;
static void system_clock_200m_8m_hxtal(void);
#elif defined (__SYSTEM_CLOCK_200M_PLL_25M_HXTAL)
uint32_t SystemCoreClock = __SYSTEM_CLOCK_200M_PLL_25M_HXTAL;
static void system_clock_200m_25m_hxtal(void);
#endif /* __SYSTEM_CLOCK_IRC16M */
/* configure the system clock */
static void system_clock_config(void);
/*!
\brief setup the microcontroller system, initialize the system
\param[in] none
\param[out] none
\retval none
*/
void SystemInit (void)
{
/* FPU settings */
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
#endif
/* Reset the RCU clock configuration to the default reset state */
/* Set IRC16MEN bit */
RCU_CTL |= RCU_CTL_IRC16MEN;
RCU_MODIFY
RCU_CFG0 &= ~RCU_CFG0_SCS;
/* Reset HXTALEN, CKMEN and PLLEN bits */
RCU_CTL &= ~(RCU_CTL_PLLEN | RCU_CTL_CKMEN | RCU_CTL_HXTALEN);
/* Reset HSEBYP bit */
RCU_CTL &= ~(RCU_CTL_HXTALBPS);
/* Reset CFG0 register */
RCU_CFG0 = 0x00000000U;
/* wait until IRC16M is selected as system clock */
while(0 != (RCU_CFG0 & RCU_SCSS_IRC16M)){
}
/* Reset PLLCFGR register */
RCU_PLL = 0x24003010U;
/* Disable all interrupts */
RCU_INT = 0x00000000U;
/* Configure the System clock source, PLL Multiplier and Divider factors,
AHB/APBx prescalers and Flash settings */
system_clock_config();
}
/*!
\brief configure the system clock
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_config(void)
{
#ifdef __SYSTEM_CLOCK_IRC16M
system_clock_16m_irc16m();
#elif defined (__SYSTEM_CLOCK_HXTAL)
system_clock_hxtal();
#elif defined (__SYSTEM_CLOCK_120M_PLL_IRC16M)
system_clock_120m_irc16m();
#elif defined (__SYSTEM_CLOCK_120M_PLL_8M_HXTAL)
system_clock_120m_8m_hxtal();
#elif defined (__SYSTEM_CLOCK_120M_PLL_25M_HXTAL)
system_clock_120m_25m_hxtal();
#elif defined (__SYSTEM_CLOCK_168M_PLL_IRC16M)
system_clock_168m_irc16m();
#elif defined (__SYSTEM_CLOCK_168M_PLL_8M_HXTAL)
system_clock_168m_8m_hxtal();
#elif defined (__SYSTEM_CLOCK_168M_PLL_25M_HXTAL)
system_clock_168m_25m_hxtal();
#elif defined (__SYSTEM_CLOCK_200M_PLL_IRC16M)
system_clock_200m_irc16m();
#elif defined (__SYSTEM_CLOCK_200M_PLL_8M_HXTAL)
system_clock_200m_8m_hxtal();
#elif defined (__SYSTEM_CLOCK_200M_PLL_25M_HXTAL)
system_clock_200m_25m_hxtal();
#endif /* __SYSTEM_CLOCK_IRC16M */
}
#ifdef __SYSTEM_CLOCK_IRC16M
/*!
\brief configure the system clock to 16M by IRC16M
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_16m_irc16m(void)
{
uint32_t timeout = 0U;
uint32_t stab_flag = 0U;
/* enable IRC16M */
RCU_CTL |= RCU_CTL_IRC16MEN;
/* wait until IRC16M is stable or the startup time is longer than IRC16M_STARTUP_TIMEOUT */
do{
timeout++;
stab_flag = (RCU_CTL & RCU_CTL_IRC16MSTB);
}while((0U == stab_flag) && (IRC16M_STARTUP_TIMEOUT != timeout));
/* if fail */
if(0U == (RCU_CTL & RCU_CTL_IRC16MSTB)){
while(1){
}
}
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV1;
/* APB1 = AHB */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV1;
/* select IRC16M as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_IRC16M;
/* wait until IRC16M is selected as system clock */
while(0 != (RCU_CFG0 & RCU_SCSS_IRC16M)){
}
}
#elif defined (__SYSTEM_CLOCK_HXTAL)
/*!
\brief configure the system clock to HXTAL
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_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){
}
}
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV1;
/* APB1 = AHB */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV1;
/* select HXTAL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_HXTAL;
/* wait until HXTAL is selected as system clock */
while(0 == (RCU_CFG0 & RCU_SCSS_HXTAL)){
}
}
#elif defined (__SYSTEM_CLOCK_120M_PLL_IRC16M)
/*!
\brief configure the system clock to 120M by PLL which selects IRC16M as its clock source
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_120m_irc16m(void)
{
uint32_t timeout = 0U;
uint32_t stab_flag = 0U;
/* enable IRC16M */
RCU_CTL |= RCU_CTL_IRC16MEN;
/* wait until IRC16M is stable or the startup time is longer than IRC16M_STARTUP_TIMEOUT */
do{
timeout++;
stab_flag = (RCU_CTL & RCU_CTL_IRC16MSTB);
}while((0U == stab_flag) && (IRC16M_STARTUP_TIMEOUT != timeout));
/* if fail */
if(0U == (RCU_CTL & RCU_CTL_IRC16MSTB)){
while(1){
}
}
RCU_APB1EN |= RCU_APB1EN_PMUEN;
PMU_CTL |= PMU_CTL_LDOVS;
/* IRC16M is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB/2 */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV2;
/* APB1 = AHB/4 */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV4;
/* Configure the main PLL, PSC = 16, PLL_N = 240, PLL_P = 2, PLL_Q = 5 */
RCU_PLL = (16U | (240U << 6U) | (((2U >> 1U) - 1U) << 16U) |
(RCU_PLLSRC_IRC16M) | (5U << 24U));
/* enable PLL */
RCU_CTL |= RCU_CTL_PLLEN;
/* wait until PLL is stable */
while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
}
/* Enable the high-drive to extend the clock frequency to 120 Mhz */
PMU_CTL |= PMU_CTL_HDEN;
while(0U == (PMU_CS & PMU_CS_HDRF)){
}
/* select the high-drive mode */
PMU_CTL |= PMU_CTL_HDS;
while(0U == (PMU_CS & PMU_CS_HDSRF)){
}
/* select PLL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_PLLP;
/* wait until PLL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_PLLP)){
}
}
#elif defined (__SYSTEM_CLOCK_120M_PLL_8M_HXTAL)
/*!
\brief configure the system clock to 120M by PLL which selects HXTAL(8M) as its clock source
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_120m_8m_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){
}
}
RCU_APB1EN |= RCU_APB1EN_PMUEN;
PMU_CTL |= PMU_CTL_LDOVS;
/* HXTAL is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB/2 */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV2;
/* APB1 = AHB/4 */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV4;
/* Configure the main PLL, PSC = 8, PLL_N = 240, PLL_P = 2, PLL_Q = 5 */
RCU_PLL = (8U | (240U << 6U) | (((2U >> 1U) - 1U) << 16U) |
(RCU_PLLSRC_HXTAL) | (5U << 24U));
/* enable PLL */
RCU_CTL |= RCU_CTL_PLLEN;
/* wait until PLL is stable */
while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
}
/* Enable the high-drive to extend the clock frequency to 120 Mhz */
PMU_CTL |= PMU_CTL_HDEN;
while(0U == (PMU_CS & PMU_CS_HDRF)){
}
/* select the high-drive mode */
PMU_CTL |= PMU_CTL_HDS;
while(0U == (PMU_CS & PMU_CS_HDSRF)){
}
/* select PLL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_PLLP;
/* wait until PLL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_PLLP)){
}
}
#elif defined (__SYSTEM_CLOCK_120M_PLL_25M_HXTAL)
/*!
\brief configure the system clock to 120M by PLL which selects HXTAL(25M) as its clock source
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_120m_25m_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){
}
}
RCU_APB1EN |= RCU_APB1EN_PMUEN;
PMU_CTL |= PMU_CTL_LDOVS;
/* HXTAL is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB/2 */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV2;
/* APB1 = AHB/4 */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV4;
/* Configure the main PLL, PSC = 25, PLL_N = 240, PLL_P = 2, PLL_Q = 5 */
RCU_PLL = (25U | (240U << 6U) | (((2U >> 1U) - 1U) << 16U) |
(RCU_PLLSRC_HXTAL) | (5U << 24U));
/* enable PLL */
RCU_CTL |= RCU_CTL_PLLEN;
/* wait until PLL is stable */
while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
}
/* Enable the high-drive to extend the clock frequency to 120 Mhz */
PMU_CTL |= PMU_CTL_HDEN;
while(0U == (PMU_CS & PMU_CS_HDRF)){
}
/* select the high-drive mode */
PMU_CTL |= PMU_CTL_HDS;
while(0U == (PMU_CS & PMU_CS_HDSRF)){
}
/* select PLL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_PLLP;
/* wait until PLL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_PLLP)){
}
}
#elif defined (__SYSTEM_CLOCK_168M_PLL_IRC16M)
/*!
\brief configure the system clock to 168M by PLL which selects IRC16M as its clock source
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_168m_irc16m(void)
{
uint32_t timeout = 0U;
uint32_t stab_flag = 0U;
/* enable IRC16M */
RCU_CTL |= RCU_CTL_IRC16MEN;
/* wait until IRC16M is stable or the startup time is longer than IRC16M_STARTUP_TIMEOUT */
do{
timeout++;
stab_flag = (RCU_CTL & RCU_CTL_IRC16MSTB);
}while((0U == stab_flag) && (IRC16M_STARTUP_TIMEOUT != timeout));
/* if fail */
if(0U == (RCU_CTL & RCU_CTL_IRC16MSTB)){
while(1){
}
}
RCU_APB1EN |= RCU_APB1EN_PMUEN;
PMU_CTL |= PMU_CTL_LDOVS;
/* IRC16M is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB/2 */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV2;
/* APB1 = AHB/4 */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV4;
/* Configure the main PLL, PSC = 16, PLL_N = 336, PLL_P = 2, PLL_Q = 7 */
RCU_PLL = (16U | (336U << 6U) | (((2U >> 1U) - 1U) << 16U) |
(RCU_PLLSRC_IRC16M) | (7U << 24U));
/* enable PLL */
RCU_CTL |= RCU_CTL_PLLEN;
/* wait until PLL is stable */
while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
}
/* Enable the high-drive to extend the clock frequency to 168 Mhz */
PMU_CTL |= PMU_CTL_HDEN;
while(0U == (PMU_CS & PMU_CS_HDRF)){
}
/* select the high-drive mode */
PMU_CTL |= PMU_CTL_HDS;
while(0U == (PMU_CS & PMU_CS_HDSRF)){
}
/* select PLL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_PLLP;
/* wait until PLL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_PLLP)){
}
}
#elif defined (__SYSTEM_CLOCK_168M_PLL_8M_HXTAL)
/*!
\brief configure the system clock to 168M by PLL which selects HXTAL(8M) as its clock source
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_168m_8m_hxtal(void)
{
uint32_t timeout = 0U;
/* enable HXTAL */
RCU_CTL |= RCU_CTL_HXTALEN;
/* wait until HXTAL is stable or the startup time is longer than HXTAL_STARTUP_TIMEOUT */
while((0U == (RCU_CTL & RCU_CTL_HXTALSTB)) && (HXTAL_STARTUP_TIMEOUT != timeout++)){
}
/* if fail */
if(0U == (RCU_CTL & RCU_CTL_HXTALSTB)){
while(1){
}
}
RCU_APB1EN |= RCU_APB1EN_PMUEN;
PMU_CTL |= PMU_CTL_LDOVS;
/* HXTAL is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB/2 */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV2;
/* APB1 = AHB/4 */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV4;
/* Configure the main PLL, PSC = 8, PLL_N = 336, PLL_P = 2, PLL_Q = 7 */
RCU_PLL = (8U | (336 << 6U) | (((2 >> 1U) -1U) << 16U) |
(RCU_PLLSRC_HXTAL) | (7 << 24U));
/* enable PLL */
RCU_CTL |= RCU_CTL_PLLEN;
/* wait until PLL is stable */
while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
}
/* Enable the high-drive to extend the clock frequency to 168 Mhz */
PMU_CTL |= PMU_CTL_HDEN;
while(0U == (PMU_CS & PMU_CS_HDRF)){
}
/* select the high-drive mode */
PMU_CTL |= PMU_CTL_HDS;
while(0U == (PMU_CS & PMU_CS_HDSRF)){
}
/* select PLL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_PLLP;
/* wait until PLL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_PLLP)){
}
}
#elif defined (__SYSTEM_CLOCK_168M_PLL_25M_HXTAL)
/*!
\brief configure the system clock to 168M by PLL which selects HXTAL(25M) as its clock source
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_168m_25m_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){
}
}
RCU_APB1EN |= RCU_APB1EN_PMUEN;
PMU_CTL |= PMU_CTL_LDOVS;
/* HXTAL is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV2;
/* APB1 = AHB */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV4;
/* Configure the main PLL, PSC = 25, PLL_N = 336, PLL_P = 2, PLL_Q = 7 */
RCU_PLL = (25U | (336U << 6U) | (((2U >> 1U) - 1U) << 16U) |
(RCU_PLLSRC_HXTAL) | (7U << 24U));
/* enable PLL */
RCU_CTL |= RCU_CTL_PLLEN;
/* wait until PLL is stable */
while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
}
/* Enable the high-drive to extend the clock frequency to 168 Mhz */
PMU_CTL |= PMU_CTL_HDEN;
while(0U == (PMU_CS & PMU_CS_HDRF)){
}
/* select the high-drive mode */
PMU_CTL |= PMU_CTL_HDS;
while(0U == (PMU_CS & PMU_CS_HDSRF)){
}
/* select PLL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_PLLP;
/* wait until PLL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_PLLP)){
}
}
#elif defined (__SYSTEM_CLOCK_200M_PLL_IRC16M)
/*!
\brief configure the system clock to 200M by PLL which selects IRC16M as its clock source
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_200m_irc16m(void)
{
uint32_t timeout = 0U;
uint32_t stab_flag = 0U;
/* enable IRC16M */
RCU_CTL |= RCU_CTL_IRC16MEN;
/* wait until IRC16M is stable or the startup time is longer than IRC16M_STARTUP_TIMEOUT */
do{
timeout++;
stab_flag = (RCU_CTL & RCU_CTL_IRC16MSTB);
}while((0U == stab_flag) && (IRC16M_STARTUP_TIMEOUT != timeout));
/* if fail */
if(0U == (RCU_CTL & RCU_CTL_IRC16MSTB)){
while(1){
}
}
RCU_APB1EN |= RCU_APB1EN_PMUEN;
PMU_CTL |= PMU_CTL_LDOVS;
/* IRC16M is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB/2 */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV2;
/* APB1 = AHB/4 */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV4;
/* Configure the main PLL, PSC = 16, PLL_N = 400, PLL_P = 2, PLL_Q = 9 */
RCU_PLL = (16U | (400U << 6U) | (((2U >> 1U) - 1U) << 16U) |
(RCU_PLLSRC_IRC16M) | (9U << 24U));
/* enable PLL */
RCU_CTL |= RCU_CTL_PLLEN;
/* wait until PLL is stable */
while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
}
/* Enable the high-drive to extend the clock frequency to 200 Mhz */
PMU_CTL |= PMU_CTL_HDEN;
while(0U == (PMU_CS & PMU_CS_HDRF)){
}
/* select the high-drive mode */
PMU_CTL |= PMU_CTL_HDS;
while(0U == (PMU_CS & PMU_CS_HDSRF)){
}
/* select PLL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_PLLP;
/* wait until PLL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_PLLP)){
}
}
#elif defined (__SYSTEM_CLOCK_200M_PLL_8M_HXTAL)
/*!
\brief configure the system clock to 200M by PLL which selects HXTAL(8M) as its clock source
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_200m_8m_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){
}
}
RCU_APB1EN |= RCU_APB1EN_PMUEN;
PMU_CTL |= PMU_CTL_LDOVS;
/* HXTAL is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB/2 */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV2;
/* APB1 = AHB/4 */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV4;
/* Configure the main PLL, PSC = 8, PLL_N = 400, PLL_P = 2, PLL_Q = 9 */
RCU_PLL = (8U | (400U << 6U) | (((2U >> 1U) - 1U) << 16U) |
(RCU_PLLSRC_HXTAL) | (9U << 24U));
/* enable PLL */
RCU_CTL |= RCU_CTL_PLLEN;
/* wait until PLL is stable */
while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
}
/* Enable the high-drive to extend the clock frequency to 200 Mhz */
PMU_CTL |= PMU_CTL_HDEN;
while(0U == (PMU_CS & PMU_CS_HDRF)){
}
/* select the high-drive mode */
PMU_CTL |= PMU_CTL_HDS;
while(0U == (PMU_CS & PMU_CS_HDSRF)){
}
/* select PLL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_PLLP;
/* wait until PLL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_PLLP)){
}
}
#elif defined (__SYSTEM_CLOCK_200M_PLL_25M_HXTAL)
/*!
\brief configure the system clock to 200M by PLL which selects HXTAL(25M) as its clock source
\param[in] none
\param[out] none
\retval none
*/
static void system_clock_200m_25m_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){
}
}
RCU_APB1EN |= RCU_APB1EN_PMUEN;
PMU_CTL |= PMU_CTL_LDOVS;
/* HXTAL is stable */
/* AHB = SYSCLK */
RCU_CFG0 |= RCU_AHB_CKSYS_DIV1;
/* APB2 = AHB/2 */
RCU_CFG0 |= RCU_APB2_CKAHB_DIV2;
/* APB1 = AHB/4 */
RCU_CFG0 |= RCU_APB1_CKAHB_DIV4;
/* Configure the main PLL, PSC = 25, PLL_N = 400, PLL_P = 2, PLL_Q = 9 */
RCU_PLL = (25U | (400U << 6U) | (((2U >> 1U) - 1U) << 16U) |
(RCU_PLLSRC_HXTAL) | (9U << 24U));
/* enable PLL */
RCU_CTL |= RCU_CTL_PLLEN;
/* wait until PLL is stable */
while(0U == (RCU_CTL & RCU_CTL_PLLSTB)){
}
/* Enable the high-drive to extend the clock frequency to 200 Mhz */
PMU_CTL |= PMU_CTL_HDEN;
while(0U == (PMU_CS & PMU_CS_HDRF)){
}
/* select the high-drive mode */
PMU_CTL |= PMU_CTL_HDS;
while(0U == (PMU_CS & PMU_CS_HDSRF)){
}
/* select PLL as system clock */
RCU_CFG0 &= ~RCU_CFG0_SCS;
RCU_CFG0 |= RCU_CKSYSSRC_PLLP;
/* wait until PLL is selected as system clock */
while(0U == (RCU_CFG0 & RCU_SCSS_PLLP)){
}
}
#endif /* __SYSTEM_CLOCK_IRC16M */
/*!
\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 sws;
uint32_t pllpsc, plln, pllsel, pllp, ck_src, idx, clk_exp;
/* exponent of AHB, APB1 and APB2 clock divider */
const uint8_t ahb_exp[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
sws = GET_BITS(RCU_CFG0, 2, 3);
switch(sws){
/* IRC16M is selected as CK_SYS */
case SEL_IRC16M:
SystemCoreClock = IRC16M_VALUE;
break;
/* HXTAL is selected as CK_SYS */
case SEL_HXTAL:
SystemCoreClock = HXTAL_VALUE;
break;
/* PLLP is selected as CK_SYS */
case SEL_PLLP:
/* get the value of PLLPSC[5:0] */
pllpsc = GET_BITS(RCU_PLL, 0U, 5U);
plln = GET_BITS(RCU_PLL, 6U, 14U);
pllp = (GET_BITS(RCU_PLL, 16U, 17U) + 1U) * 2U;
/* PLL clock source selection, HXTAL or IRC8M/2 */
pllsel = (RCU_PLL & RCU_PLL_PLLSEL);
if (RCU_PLLSRC_HXTAL == pllsel) {
ck_src = HXTAL_VALUE;
} else {
ck_src = IRC16M_VALUE;
}
SystemCoreClock = ((ck_src / pllpsc) * plln) / pllp;
break;
/* IRC16M is selected as CK_SYS */
default:
SystemCoreClock = IRC16M_VALUE;
break;
}
/* calculate AHB clock frequency */
idx = GET_BITS(RCU_CFG0, 4, 7);
clk_exp = ahb_exp[idx];
SystemCoreClock = SystemCoreClock >> clk_exp;
}
