假如你是以为资深的嵌入式工程师,你要用32位的MCU,RISC架构的芯片,实现四位共阴数码管上显示RTC的时间,并转化成详细的代码。
时间: 2024-05-16 11:15:18 浏览: 47
好的,我可以为您提供代码实现。
首先,我们需要选择一款32位的MCU,比如STMicroelectronics的STM32系列。然后,我们需要使用一个RTC模块来获取当前时间。可以通过I2C接口与RTC模块进行通信。接下来,我们需要将当前时间转换成四位共阴数码管上的显示。
以下是基本的代码实现:
```c
#include "stm32f10x.h"
#define RTC_ADDRESS 0xD0 // RTC模块的地址
// 数码管显示的字符表
unsigned char digital_num[10] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F};
// RTC模块初始化函数
void RTC_Init(void)
{
// 打开外设时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
// I2C1 GPIO配置
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// I2C1配置
I2C_InitTypeDef I2C_InitStructure;
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = 0x00;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 100000;
I2C_Init(I2C1, &I2C_InitStructure);
// 使能I2C1
I2C_Cmd(I2C1, ENABLE);
}
// 获取RTC时间函数
void RTC_Get_Time(unsigned char *hour, unsigned char *minute, unsigned char *second)
{
unsigned char temp[3];
I2C_AcknowledgeConfig(I2C1, ENABLE);
I2C_GenerateSTART(I2C1, ENABLE);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, RTC_ADDRESS, I2C_Direction_Transmitter);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, 0);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTART(I2C1, ENABLE);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, RTC_ADDRESS, I2C_Direction_Receiver);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
temp[0] = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
temp[1] = I2C_ReceiveData(I2C1);
I2C_GenerateSTOP(I2C1, ENABLE);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
temp[2] = I2C_ReceiveData(I2C1);
// 将BCD码转换成十进制数
*hour = ((temp[2] & 0x30) >> 4) * 10 + (temp[2] & 0x0F);
*minute = ((temp[1] & 0x70) >> 4) * 10 + (temp[1] & 0x0F);
*second = ((temp[0] & 0x70) >> 4) * 10 + (temp[0] & 0x0F);
}
// 数码管显示函数
void Display_Digital(unsigned char num)
{
GPIO_ResetBits(GPIOB, GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3);
GPIO_Write(GPIOB, digital_num[num]);
}
// 主函数
int main(void)
{
unsigned char hour, minute, second;
// 初始化RTC模块
RTC_Init();
// 主循环
while (1)
{
// 获取RTC时间
RTC_Get_Time(&hour, &minute, &second);
// 数码管显示小时
Display_Digital(hour / 10);
GPIO_SetBits(GPIOB, GPIO_Pin_0);
Delay(1);
GPIO_ResetBits(GPIOB, GPIO_Pin_0);
Display_Digital(hour % 10);
GPIO_SetBits(GPIOB, GPIO_Pin_1);
Delay(1);
GPIO_ResetBits(GPIOB, GPIO_Pin_1);
// 数码管显示分钟
Display_Digital(minute / 10);
GPIO_SetBits(GPIOB, GPIO_Pin_2);
Delay(1);
GPIO_ResetBits(GPIOB, GPIO_Pin_2);
Display_Digital(minute % 10);
GPIO_SetBits(GPIOB, GPIO_Pin_3);
Delay(1);
GPIO_ResetBits(GPIOB, GPIO_Pin_3);
}
}
```
以上代码仅供参考,实际使用时需要根据具体的MCU和RTC模块进行相应的调整。