【CH579M-R1】+ Turn on timer 0 to control LED flashing and refresh LCD time display

hujj

【CH579M-R1】+ Turn on timer 0 to control LED flashing and refresh LCD time display [Copy link]

 

In order to refresh the date and time displayed on the LCD at regular intervals, I started to use the SysTick timer to count, but I didn't know where the interrupt processing function was after searching for a long time. I only found a function in the CH57x_sys.c file to get the current count value of SysTick. I looked through the data sheet but still had no clue. I had to set timer 0, set the interrupt cycle to 100ms, then add 1 to the timing variable in the interrupt processing function, and make judgments in the main loop of the main function. The following figure shows the test process:

The LED on the left of the upper left corner is a breathing light, and the LED on the right flashes at a cycle of 1 second. Here is the animated effect:

Here is the code for the test:

/********************************** (C) COPYRIGHT *******************************
* File Name          : Main.c
* Author             : WCH
* Version            : 
* Date               : 2020/09/10
* Description 		 : 开发板测试
*******************************************************************************/

#include "CH57x_common.h"
#include "lcd_5110.h"
#include "ds1307.h"


UINT8 TxBuff[]="This is a tx exam\r\n";
UINT8 RxBuff[100];
UINT8 trigB;
UINT8 mode;
uint16_t year;              //年
uint8_t week,month,day,hour,minute,second,DS_Buff[8];//月日时分秒
volatile UINT16 time,ms;

int main()
{
    UINT8 i,dir,half,flag;
    
    
/* 配置串口1：先配置IO口模式，再配置串口 */   
    GPIOA_SetBits(GPIO_Pin_9);
    GPIOA_ModeCfg(GPIO_Pin_8, GPIO_ModeIN_PU);			  // RXD-配置上拉输入
    GPIOA_ModeCfg(GPIO_Pin_9, GPIO_ModeOut_PP_5mA);		// TXD-配置推挽输出，注意先让IO口输出高电平
    UART1_DefInit();
    
// 测试串口发送字符串
    UART1_SendString( TxBuff, sizeof(TxBuff) );

// 配置定时器0
    TMR0_TimerInit( FREQ_SYS/10 );                  // 设置定时时间 100ms
    TMR0_ITCfg(ENABLE, TMR0_3_IT_CYC_END);          // 开启中断
    NVIC_EnableIRQ( TMR0_IRQn );

/* 配置LED和PWM */
    GPIOA_ModeCfg(GPIO_Pin_6, GPIO_ModeOut_PP_5mA); // PA6 - PWM4(LED4)
    GPIOB_ModeCfg(GPIO_Pin_6, GPIO_ModeOut_PP_5mA); // PB6 - LED3
    PWMX_CLKCfg( 4 );
    PWMX_CycleCfg( PWMX_Cycle_64 );
	

    GPIOB_ModeCfg(GPIO_Pin_4, GPIO_ModeOut_PP_5mA); // PB4 - LED_G
    GPIOB_ModeCfg(GPIO_Pin_7, GPIO_ModeOut_PP_5mA); // PB7 - LED_Y
    GPIOB_InverseBits(4);

    LCD_init();           //LCD5110初始化
	display_main();       //显示主界面
	
	DS1307_Init();        //初始化DS1307模块
	DS1307_read_date();
	
	
    // 中断方式：接收数据后发送出去
    UART1_ByteTrigCfg( UART_7BYTE_TRIG );
    trigB = 7;
    UART1_INTCfg( ENABLE, RB_IER_RECV_RDY|RB_IER_LINE_STAT );
    NVIC_EnableIRQ( UART1_IRQn );


    while(1)
    {
/*        //串口测试  查询方式：接收数据后发送出去
        len = UART1_RecvString(RxBuff);
        if( len )
        {
            UART1_SendString( RxBuff, len );            
        }
*/
		//PWM测试
        if(dir){
            i--;
            if(i == 0){
                dir = 0;
			    GPIOB_InverseBits(GPIO_Pin_4);
			}
        }
        else{
            i++;
            if(i == 64){
                dir = 1;
				GPIOB_InverseBits(GPIO_Pin_7);
			}
		}
        PWMX_ACTOUT( CH_PWM4, i, Low_Level, ENABLE);

//        PWMX_ACTOUT( CH_PWM7, 64-i, Low_Level, ENABLE);
        mDelaymS(10);
        //LED3闪烁测试
        time++;
        if(ms > 4){            //半秒处理
            ms = 0;
            GPIOB_InverseBits(GPIO_Pin_6);
            half++;
        }
		if(half>1){            //秒处理
		    second++;
			if(second > 59){
			    second = 0;
				DS1307_read_date();
			}
			display_time(hour,minute,second);
			half = 0;
			if(flag)           //轮换显示月日或年份
			    display_year(year);
			else
				display_date(month,day);
			flag++;
			if(flag > 1)
				flag = 0;
		}
    }
}


void UART1_IRQHandler(void)
{
    UINT8 i;
    
    switch( UART1_GetITFlag() )
    {
        case UART_II_LINE_STAT:        // 线路状态错误
            UART1_GetLinSTA();
            break;
        
        case UART_II_RECV_RDY:          // 数据达到设置触发点
            for(i=0; i!=trigB; i++)
            {
                RxBuff[i] = UART1_RecvByte();
                UART1_SendByte(RxBuff[i]);
            }
            break;
        
        case UART_II_RECV_TOUT:         // 接收超时，暂时一帧数据接收完成
            i = UART1_RecvString(RxBuff);
            UART1_SendString( RxBuff, i ); 
            break;
        
        case UART_II_THR_EMPTY:         // 发送缓存区空，可继续发送
            break;
        
        case UART_II_MODEM_CHG:         // 只支持串口0
            break;
        
        default:
            break;
    }
}

void TMR0_IRQHandler( void )        // TMR0 定时中断
{
    if( TMR0_GetITFlag( TMR0_3_IT_CYC_END ) )
    {
        TMR0_ClearITFlag( TMR0_3_IT_CYC_END );      // 清除中断标志
        GPIOB_InverseBits( GPIO_Pin_3 );        
    }
	ms++;
}

okhxyyo

Qinheng CH579M-R1 Development Board Review

Summary post: https://en.eeworld.com/bbs/thread-1140005-1-1.html

freebsder

It should be in .S or the corresponding .C, you need to fill it in yourself/

hujj

freebsder posted on 2020-9-14 21:32 It should be in .S or the corresponding .C, you need to fill it in yourself/

Do I need to add the name of the SysTick interrupt handler function to this file?

freebsder

hujj posted on 2020-9-15 07:49 Should I add the name of the SysTick interrupt handler function to this file?

It doesn't have to be filled in here. Anyway, cortex supports linking C code, so just put it in other C files. You can find the function name in this file. For example, the name of the film I have is SysTick_Handler

    .align 1
    .thumb_func
    .weak SysTick_Handler
    .type SysTick_Handler, %function
SysTick_Handler:
    ldr   r0,=SysTick_Handler
    bx    r0
    .size SysTick_Handler, . - SysTick_Handler

In other C

viod SysTick_Handler(void)
{
    i++;
}

That's it.

Of course, don't forget to turn on systick, it is in the cmsis code, just call it directly.

hujj

freebsder posted on 2020-9-15 11:03 It doesn't have to be filled in here. Anyway, cortex supports linking C code, so just put it in other C files. Just the function name you can put in this file...

Thank you! I found the SysTick_Handler content in the startup_ARMCM0.s file, as shown below:

Next try how to enable SysTick.