【凌鸥创芯电机开发板LKS32MC071CBT8评测报告】+DS1302模块计时与OLED屏显示
本帖最后由 jinglixixi 于 2023-6-24 11:23 编辑#申请原创#@21小跑堂
由于LKS32MC071没有内置RTC计时器，因此要实现电子时钟类的计时功能需外挂RTC计时模块，这里采用的DS1302功能模块。在使用时，DS1302模块与开发板的连接关系为：SCK ---P00IO---P32RST ---P210图1 所用接口
为便于编程，对各引脚输出高低电平的语句定义为：#define SCK_Set() GPIO_SetBits(GPIO0, GPIO_Pin_0)#define SCK_Clr() GPIO_ResetBits(GPIO0, GPIO_Pin_0)#define IO_Set() GPIO_SetBits(GPIO3, GPIO_Pin_2)#define IO_Clr() GPIO_ResetBits(GPIO3, GPIO_Pin_2)#define RST_Set() GPIO_SetBits(GPIO2, GPIO_Pin_10)#define RST_Clr() GPIO_ResetBits(GPIO2, GPIO_Pin_10)#define IO_IN GPIO_ReadInputDataBit(GPIO3,GPIO_Pin_2)DS1302模块对所用引脚的配置函数为：void ds1302_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Pin =GPIO_Pin_0;
GPIO_Init(GPIO0, &GPIO_InitStruct);
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Pin =GPIO_Pin_10;
GPIO_Init(GPIO2, &GPIO_InitStruct);
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Pin =GPIO_Pin_2;
GPIO_Init(GPIO3, &GPIO_InitStruct);
}
在使用过程中，DS1302模块的数据引脚既使用输出模式，又使用输入模式，故定义了输入与输出模式的函数，其内容如下：void INPUT_MODE_SET(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStruct.GPIO_Pin =GPIO_Pin_2;
GPIO_Init(GPIO3, &GPIO_InitStruct);
}
void OUTPUT_MODE_SET(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Pin =GPIO_Pin_2;
GPIO_Init(GPIO3, &GPIO_InitStruct);
}
DS1302模块写入时间值的函数为：void ds1302_write_time(void)
{
ds1302_write_byte(ds1302_control_add,0x00);
ds1302_write_byte(ds1302_sec_add,0x80);
ds1302_write_byte(ds1302_year_add,time_buf);
ds1302_write_byte(ds1302_month_add,time_buf);
ds1302_write_byte(ds1302_date_add,time_buf);
ds1302_write_byte(ds1302_hr_add,time_buf);
ds1302_write_byte(ds1302_min_add,time_buf);
ds1302_write_byte(ds1302_sec_add,time_buf);
ds1302_write_byte(ds1302_day_add,time_buf);
ds1302_write_byte(ds1302_control_add,0x80);
}
DS1302模块读取时间值的函数为：void ds1302_read_time(void)
{
time_buf=ds1302_read_byte(ds1302_year_add);
time_buf=ds1302_read_byte(ds1302_month_add);
time_buf=ds1302_read_byte(ds1302_date_add);
time_buf=ds1302_read_byte(ds1302_hr_add);
time_buf=ds1302_read_byte(ds1302_min_add);
time_buf=(ds1302_read_byte(ds1302_sec_add))&0x7f;
time_buf=ds1302_read_byte(ds1302_day_add);
}
为便于观察RTC计时效果，这里为其配备了OLED屏的显示功能。
该OLED屏是一款I2C接口的显示屏，它占用引脚少，显示信息较丰富，其显示效果如图2所示。图2 显示效果
该显示屏与开发板的连接关系为：SDA ---P22CLK ---P23定义引脚输出高低电平输出的语句为：#define SDA_high GPIO_SetBits(GPIO2, GPIO_Pin_2)#define SDA_low GPIO_ResetBits(GPIO2, GPIO_Pin_2)#define SCL_high GPIO_SetBits(GPIO2, GPIO_Pin_3)#define SCL_low GPIO_ResetBits(GPIO2,GPIO_Pin_3)
对所用引脚的配置函数为：void oled_gpio_init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_StructInit(&GPIO_InitStruct);
GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_Pin =GPIO_Pin_2|GPIO_Pin_3;
GPIO_Init(GPIO2, &GPIO_InitStruct);
}
OLED屏初始化函数为：void OLED_Init(void)
{
OLED_WR_Byte(0xAE,OLED_CMD);
OLED_WR_Byte(0x02,OLED_CMD);
OLED_WR_Byte(0x10,OLED_CMD);
OLED_WR_Byte(0x40,OLED_CMD)
OLED_WR_Byte(0x81,OLED_CMD);
OLED_WR_Byte(0xff,OLED_CMD);
OLED_WR_Byte(0xA1,OLED_CMD);
OLED_WR_Byte(0xC8,OLED_CMD);
OLED_WR_Byte(0xA6,OLED_CMD);
OLED_WR_Byte(0xA8,OLED_CMD);
OLED_WR_Byte(0x3f,OLED_CMD);
OLED_WR_Byte(0xD3,OLED_CMD);
OLED_WR_Byte(0x00,OLED_CMD);
OLED_WR_Byte(0xd5,OLED_CMD);
OLED_WR_Byte(0x80,OLED_CMD);
OLED_WR_Byte(0xD9,OLED_CMD);
OLED_WR_Byte(0xF1,OLED_CMD);
OLED_WR_Byte(0xDA,OLED_CMD);
OLED_WR_Byte(0x12,OLED_CMD);
OLED_WR_Byte(0xDB,OLED_CMD);
OLED_WR_Byte(0x40,OLED_CMD);
OLED_WR_Byte(0x20,OLED_CMD);
OLED_WR_Byte(0x02,OLED_CMD);
OLED_WR_Byte(0x8D,OLED_CMD);
OLED_WR_Byte(0x14,OLED_CMD);
OLED_WR_Byte(0xA4,OLED_CMD);
OLED_WR_Byte(0xA6,OLED_CMD);
OLED_WR_Byte(0xAF,OLED_CMD);
OLED_WR_Byte(0xAF,OLED_CMD);
OLED_Clear();
OLED_Set_Pos(0,0);
}
实现RTC计时值显示的函数为：void RTC_disp(void)
{
sj=(time_buf>>4)+'0';
sj=(time_buf&0x0f)+'0';
sj=(time_buf>>4)+'0';
sj=(time_buf&0x0f)+'0';
sj=(time_buf>>4)+'0';
sj=(time_buf&0x0f)+'0';
OLED_ShowChar(0,4,sj,16);
OLED_ShowChar(8,4,sj,16);
OLED_ShowChar(16,4,':',16);
OLED_ShowChar(24,4,sj,16);
OLED_ShowChar(32,4,sj,16);
OLED_ShowChar(40,4,':',16);
OLED_ShowChar(48,4,sj,16);
OLED_ShowChar(56,4,sj,16);
}
实现图3所示显示效果的主程序为：int main(void)
{
Hardware_init();
Delay_Ms(500);
OLED_Init();
OLED_Clear();
OLED_ShowString(0,0,"LKS32MC071",16);
OLED_ShowString(0,2,"OLED & DS1302",16);
ds1302_init();
ds1302_write_time();
for (;;)
{
ds1302_read_time();
RTC_ disp ();
GPIO_SetBits(GPIO0, GPIO_Pin_6);
Delay_Ms(400);
GPIO_ResetBits(GPIO0, GPIO_Pin_6);
Delay_Ms(400);
}
}
图3计时效果
有了DS1302模块的计时功能，就可以和点阵板相配合来实现计时公告牌的功能。
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