[Fudan Micro FM33LC046N Review] + GPTIM breathing light

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[Fudan Micro FM33LC046N Review] + GPTIM breathing light [Copy link]

 

I powered on the Jlink and tested it as soon as I got it. I don't know if it was a problem with the Jlink firmware version or the hardware itself, but the MDK upload program could not recognize the chip.

I have tried but the problem has not been solved. If anyone encounters this problem, please give me some advice.

Everything can be lit up. A blogger has already made a program to control LED with buttons. Today, let’s make a breathing light!

According to the manual, LC046N has six timers.

The LEDs of the demo board are mounted on two general timers GPTIM

Here we use LED3 as the demonstration object, LED3 corresponds to GPIO_B10

Initialize GPIO_B10 and channel 1 of GPTIM0, set the pre-scaling coefficient and auto-reload value;

void MF_GPTIM0_TimerBase_Init(void)
{

  FL_GPTIM_InitTypeDef  TimerBaseInitStruct;

  TimerBaseInitStruct.prescaler = (uint16_t)999;  //预分频系数
  TimerBaseInitStruct.counterMode = FL_GPTIM_COUNTER_DIR_UP;//计数模式
  TimerBaseInitStruct.autoReload = 120;      //自动重装载值
  TimerBaseInitStruct.autoReloadState = DISABLE;//预装载使能
  TimerBaseInitStruct.clockDivision = FL_GPTIM_CLK_DIVISION_DIV1;//采样时钟分频比

  FL_GPTIM_Init(GPTIM0,&TimerBaseInitStruct );

 
}

void MF_GPTIM0_Channel1_Init(void)
{

  FL_GPIO_InitTypeDef  GPIO_InitStruct;

  FL_GPTIM_OC_InitTypeDef  defaultInitStruct;

  GPIO_InitStruct.pin = FL_GPIO_PIN_10; //GPIO
  GPIO_InitStruct.mode = FL_GPIO_MODE_DIGITAL;//模式
  GPIO_InitStruct.outputType = FL_GPIO_OUTPUT_PUSHPULL;//输出类型
  GPIO_InitStruct.pull = DISABLE; //上拉试能
  GPIO_InitStruct.remapPin = ENABLE;//重定向

  FL_GPIO_Init( GPIOB, &GPIO_InitStruct );

  defaultInitStruct.OCMode = FL_GPTIM_OC_MODE_PWM1;//输出模式
  defaultInitStruct.OCFastMode = DISABLE;
  defaultInitStruct.OCPreload = DISABLE;
  defaultInitStruct.compareValue = 0x1F4U;
  defaultInitStruct.OCPolarity = FL_GPTIM_OC_POLARITY_NORMAL;
  defaultInitStruct.OCETRFStatus = DISABLE; //ETR清零使能

  FL_GPTIM_OC_Init(GPTIM0,FL_GPTIM_CHANNEL_1,&defaultInitStruct );

 
}

You can see the output function of TIM in fm33lc0xx_fl_gptim.h and call it directly in the main function

main.c

#include "main.h"
#include "demo_gptim.h"



int main(void)
{
		uint16_t pwmval=10;	
	  uint8_t dir=1;
    MF_Clock_Init();
    

    MF_SystemClock_Config();

    UserInit();


    MF_Config_Init();
    GPTIM_Start( );
	
    while(1)
    {     DelayMs(6);
       
		if(dir)pwmval++;
		else pwmval--;

		if(pwmval>160)dir=0;
		if(pwmval<10)dir=1;										 
		
	  	//pwmval++;
     // FL_GPTIM_WriteCompareCH2(GPTIM0,pwmval);
		 FL_GPTIM_WriteCompareCH1(GPTIM0,pwmval);
    }

}

Operation effect

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The problem of Jlink failing to recognize the chip during burning has been solved

Cause: Power supply problem

Since there is no extra USB_B data cable, the board has no other external power supply except Jlink, which causes the chip to lose power and stop working during burning.

annysky2012

Generally, if JTLINK fails to connect, it is a driver problem. There is usually no problem with the hardware.

chrisrh

Dear, it should be that you did not select the right flash. Download the jflash project configuration from this link https://m.eeworld.com.cn/bbs_thread-1155827-1-1.html, find the flash of this development board, then add the flash in the flash download in Keil, and then try to burn it.

叫我阿深就好

chrisrh posted on 2021-2-26 12:18 Dear, it seems that you did not choose the right flash. In this link https://m.eeworld.com.cn/bbs_thread-1155827-1-1.html, put jflash ...

Dear, I chose LC046. This error does not occur every time, but it always happens when burning the FreeRTOS demo, which causes it to fail to burn.

freebsder

Very detailed, I learned a lot, thanks for sharing

chrisrh

Just call me Ah Shen. Posted on 2021-2-26 13:53 Dear, I chose LC046. This error does not occur every time, but the FreeRTOS demo is always like this and cannot be burned...

Uncheck Reset and Run and try again

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chrisrh posted on 2021-2-28 23:49 Uncheck Reset and Run and try again

The power supply problem has been solved, thank you