HT32F52352学习笔记之三_ht32硬件spi

作者：2023面试高手 | 2024-05-13 22:16:26

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ht32硬件spi

接着学习F52352芯片。这次写的是触发外部中断控制LED亮灭的程序。这个外部中断有15个中断号，即EXTI0-15，还是很多的。初始化过程中需要配置EXTI 来源选择寄存器 0 – ESSR0或是EXTI 来源选择寄存器 1– ESSR1选择中断来源。这个是一一对应的关系，比如选着了GPIOA的引脚4，那么就同时选择了EXTI4中断，同时中断服务函数也是要写EXTI4。相关引脚也需要复用模式才能使用。

当然由于在ht32_cm0plus_misc.h中找不到NVIC的初始化函数以及关于控制中断优先级的函数，所以相关代码就没有涉及到中断优先级的设置。

主要代码：

（1）EXIT的初始化


#include "exti.h"
 
static void EXTI_CKCU_Config()
{
    CKCU_PeripClockConfig_TypeDef CKCUClock;
	
	CKCUClock.Bit.PA   = 1;
	CKCUClock.Bit.EXTI = 1;
	CKCUClock.Bit.AFIO = 1;
	
	CKCU_PeripClockConfig(CKCUClock, ENABLE);
}
 
static void EXTI_GPIO_Config()
{
	HT_GPIO_TypeDef* GPIOx;
	
	GPIOx = HT_GPIOA;
	
	AFIO_GPxConfig(EXTI_KEY1_GPIO_ID, EXTI_KEY1_GPIO_PIN, EXTI_KEY1_AFIO_MODE);
	
	/* GPIOBx位被选作EXTIn的来源信号 */
	AFIO_EXTISourceConfig((AFIO_EXTI_CH_Enum)EXTI_KEY1_CHANNEL, (AFIO_ESS_Enum)EXTI_KEY1_GPIO_ID);
	
	/* 输入使能函数 */
	GPIO_InputConfig(GPIOx, EXTI_KEY1_GPIO_PIN, ENABLE);
	
	/* Configure the GPIO pin */
	GPIO_PullResistorConfig(GPIOx, EXTI_KEY1_GPIO_PIN, GPIO_PR_DISABLE);
	GPIO_DirectionConfig(GPIOx, EXTI_KEY1_GPIO_PIN, GPIO_DIR_IN);
}
 
static void EXTI_Config()
{
	EXTI_InitTypeDef EXTI_InitStruct;
	
	EXTI_InitStruct.EXTI_Channel = EXTI_KEY1_CHANNEL;
	EXTI_InitStruct.EXTI_Debounce = EXTI_DEBOUNCE_DISABLE;
	EXTI_InitStruct.EXTI_DebounceCnt = 0;
	
	/* EXTI 中断配置寄存器 n – EXTICFGRn */
	EXTI_InitStruct.EXTI_IntType = EXTI_NEGATIVE_EDGE;
	
	EXTI_Init(&EXTI_InitStruct);
	
	EXTI_IntConfig(EXTI_KEY1_CHANNEL, ENABLE);
	
	/* 允许中断函数在检测到中断时起作用 */ 
	NVIC_EnableIRQ(EXTI4_15_IRQn);
}
 
void EXTI_Initia()
{
	EXTI_CKCU_Config();
	EXTI_GPIO_Config();
	EXTI_Config();
}

NVIC_EnableIRQ(EXTI4_15_IRQn)这个必须要有，虽然找不到在哪里定义的......另外LED的初始化剑第二篇（https://blog.csdn.net/Unlimited_Bit/article/details/86657366）

（2）中断服务函数


void EXTI4_15_IRQHandler(void)
{
	if (EXTI_GetEdgeStatus(EXTI_KEY1_CHANNEL, EXTI_EDGE_NEGATIVE))
	{
		EXTI_ClearEdgeFlag(EXTI_KEY1_CHANNEL);
		LEDToggle(HT_GPIOC, GPIO_PIN_14);
	}
	
}

（3）main函数


#include "ht32.h"
#include "ht32_board.h"
#include "led.h"
#include "exti.h"
 
int main()
{
	LED_Init();
	EXTI_Initia();
	
	while(1)
	{
		
	}
}

对硬件方面(如引脚、模式选择等的封装)


#ifndef _EXTI_H
#define _EXTI_H
 
#include "ht32f5xxxx_01.h"
 
#define EXTI_KEY1_GPIO_ID                (GPIO_PA)
#define EXTI_KEY1_GPIO_PIN               (GPIO_PIN_4)
#define EXTI_KEY1_AFIO_MODE              (AFIO_FUN_GPIO)
#define EXTI_KEY1_CHANNEL				 (4)
 
#define EXTI_KEY2_GPIO_ID                (GPIO_PA)
#define EXTI_KEY2_GPIO_PIN               (GPIO_PIN_1)
#define EXTI_KEY2_AFIO_MODE              (AFIO_FUN_GPIO)
#define EXTI_KEY2_CHANNEL				 (1)
 
#define EXTI_KEY3_GPIO_ID                (GPIO_PA)
#define EXTI_KEY3_GPIO_PIN               (GPIO_PIN_2)
#define EXTI_KEY3_AFIO_MODE              (AFIO_FUN_GPIO)
#define EXTI_KEY3_CHANNEL				 (2)
 
void EXTI_Initia(void);
 
#endif

用到的库函数

（1）中断来源选择函数


/*********************************************************************************************************//**
 * @brief Select the GPIO pin to be used as EXTI channel.
 * @param AFIO_EXTI_CH_n: Specify the EXTI channel to be configured.
 *   This parameter can be AFIO_EXTI_CH_x.
 * @param AFIO_ESS_Px: Specify the GPIO port to be used for EXTI channel.
 *   This parameter can be AFIO_ESS_Px where x can be A ~ E.
 * @retval None
 ************************************************************************************************************/
void AFIO_EXTISourceConfig(AFIO_EXTI_CH_Enum AFIO_EXTI_CH_n, AFIO_ESS_Enum AFIO_ESS_Px)

（2）中断初始化函数


typedef enum
{
  EXTI_DEBOUNCE_DISABLE = 0x0,
  EXTI_DEBOUNCE_ENABLE  = 0x1
} EXTIDeb_TypeDef;
 
typedef enum
{
  EXTI_LOW_LEVEL     = 0x0,
  EXTI_HIGH_LEVEL    = 0x1,
  EXTI_NEGATIVE_EDGE = 0x2,
  EXTI_POSITIVE_EDGE = 0x3,
  EXTI_BOTH_EDGE     = 0x4
} EXTIInterrupt_TypeDef;
 
 
typedef struct
{
  u32 EXTI_Channel;
  EXTIDeb_TypeDef EXTI_Debounce;
  u16 EXTI_DebounceCnt;
  EXTIInterrupt_TypeDef EXTI_IntType;
} EXTI_InitTypeDef;
 
/*********************************************************************************************************//**
 * @brief Initialize the EXTI peripheral.
 * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure.
 * @retval None
 ************************************************************************************************************/
void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct)

在此说明下EXTI_Debounce、EXTI_IntType都是配置EXTI 中断配置寄存器 n – EXTICFGRn, n = 0 ~ 15。EXTI_Debounce决定是否是能去抖电路，EXTI_IntType选择触发类型。

（3）中断使能函数


/*********************************************************************************************************//**
 * @brief Enable or Disable the specified EXTI channelx interrupts.
 * @param EXTI_Channel: specify the EXTI channel.
 *   This parameter can be one of the following values:
 *     @arg EXTI_CHANNEL_0
 *     @arg EXTI_CHANNEL_1
 *     @arg EXTI_CHANNEL_2
 *     @arg EXTI_CHANNEL_3
 *     @arg EXTI_CHANNEL_4
 *     @arg EXTI_CHANNEL_5
 *     @arg EXTI_CHANNEL_6
 *     @arg EXTI_CHANNEL_7
 *     @arg EXTI_CHANNEL_8
 *     @arg EXTI_CHANNEL_9
 *     @arg EXTI_CHANNEL_10
 *     @arg EXTI_CHANNEL_11
 *     @arg EXTI_CHANNEL_12
 *     @arg EXTI_CHANNEL_13
 *     @arg EXTI_CHANNEL_14
 *     @arg EXTI_CHANNEL_15
 * @param NewState: This parameter can be ENABLE or DISABLE.
 * @retval None
 ************************************************************************************************************/
void EXTI_IntConfig(u32 EXTI_Channel, ControlStatus NewState)

（4）检测中断源状态函数


/*********************************************************************************************************//**
 * @brief Enable or Disable the specified EXTI channelx interrupts.
 * @param EXTI_Channel: specify the EXTI channel.
 *   This parameter can be one of the following values:
 *     @arg EXTI_CHANNEL_0
 *     @arg EXTI_CHANNEL_1
 *     @arg EXTI_CHANNEL_2
 *     @arg EXTI_CHANNEL_3
 *     @arg EXTI_CHANNEL_4
 *     @arg EXTI_CHANNEL_5
 *     @arg EXTI_CHANNEL_6
 *     @arg EXTI_CHANNEL_7
 *     @arg EXTI_CHANNEL_8
 *     @arg EXTI_CHANNEL_9
 *     @arg EXTI_CHANNEL_10
 *     @arg EXTI_CHANNEL_11
 *     @arg EXTI_CHANNEL_12
 *     @arg EXTI_CHANNEL_13
 *     @arg EXTI_CHANNEL_14
 *     @arg EXTI_CHANNEL_15
 * @param NewState: This parameter can be ENABLE or DISABLE.
 * @retval None
 ************************************************************************************************************/
void EXTI_IntConfig(u32 EXTI_Channel, ControlStatus NewState)

（5）中断标志位清除函数


/*********************************************************************************************************//**
 * @brief Clear the specified EXTI channelx edge flag.
 * @param EXTI_Channel: specify the EXTI channel.
 *   This parameter can be one of the following values:
 *     @arg EXTI_CHANNEL_0
 *     @arg EXTI_CHANNEL_1
 *     @arg EXTI_CHANNEL_2
 *     @arg EXTI_CHANNEL_3
 *     @arg EXTI_CHANNEL_4
 *     @arg EXTI_CHANNEL_5
 *     @arg EXTI_CHANNEL_6
 *     @arg EXTI_CHANNEL_7
 *     @arg EXTI_CHANNEL_8
 *     @arg EXTI_CHANNEL_9
 *     @arg EXTI_CHANNEL_10
 *     @arg EXTI_CHANNEL_11
 *     @arg EXTI_CHANNEL_12
 *     @arg EXTI_CHANNEL_13
 *     @arg EXTI_CHANNEL_14
 *     @arg EXTI_CHANNEL_15
 * @retval None
 ************************************************************************************************************/
void EXTI_ClearEdgeFlag(u32 EXTI_Channel)

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