【目的】

CW32L083开发板上有8个段码LCD显示，使其显示为0-9数字。

实现步骤

初始化LCD

void LCD_Configuration(void)
{
    LCD_InitTypeDef LCD_InitStruct = {0};

    LCD_InitStruct.LCD_Bias = LCD_Bias_1_3;
    LCD_InitStruct.LCD_ClockSource = LCD_CLOCK_SOURCE_LSI;
    LCD_InitStruct.LCD_Duty = LCD_Duty_1_4;
    LCD_InitStruct.LCD_ScanFreq = LCD_SCAN_FREQ_256HZ;
    LCD_InitStruct.LCD_VoltageSource = LCD_VoltageSource_Internal;

    __RCC_LCD_CLK_ENABLE();
    RCC_LSI_Enable();
    LCD_Init(&LCD_InitStruct);     //基本配置
    // BTL004 LCD 对应的连接
    //PA12 COM3
    //PA11 COM2
    //PA10 COM1
    //PA09 COM0
    //PA08 SEG0
    //PC09 SEG1
    //PC08 SEG2
    //PC07 SEG3
    //PC06 SEG4
    //PD15 SEG32
    //PD14 SEG33
    //PD13 SEG34
    //PD12 SEG35
    //PD11 SEG36
    //PD10 SEG37
    //PD09 SEG38
    //PD08 SEG39
    //PB15 SEG5
    //PB14 SEG6
    //PB13 SEG7
    // 分配引脚
    LCD_COMConfig(LCD_COM0 | LCD_COM1 | LCD_COM2 | LCD_COM3, ENABLE);
    LCD_SEG0to23Config(0x0000FF, ENABLE);
    LCD_SEG32to55Config(0x0000FF,ENABLE);



    CW_LCD- >RAM[0] = 0;
    CW_LCD- >RAM[1] = 0;
    CW_LCD- >RAM2 = 0;
    CW_LCD- >RAM3 = 0;
    CW_LCD- >RAM4 = 0;
    CW_LCD- >RAM5 = 0;
    CW_LCD- >RAM6 = 0;
    CW_LCD- >RAM7 = 0;
    CW_LCD- >RAM8 = 0;
    CW_LCD- >RAM9 = 0;
    CW_LCD- >RAM10 = 0;
    CW_LCD- >RAM11 = 0;
    CW_LCD- >RAM12 = 0;
    CW_LCD- >RAM13 = 0;

    LCD_Cmd(ENABLE);
    CW_LCD- >RAM0 = 0x0f0f;
    LCD_ContrastConfig(LCD_Contrast_Level_2);
    LCD_DriveVoltageConfig(LCD_INRS_LEVEL_0);
}

段码LCD一个8位数据由高、低两个显示位来组成，定义函数如下：

/*  段码低8（左） */
static uint8_t num_L[10] = {
	0x0d, //0
	0x00, //1
	0x0e, //2
	0x0a, //3
	0x03, //4
	0x0b,  //5
	0x0f,  //6
	0x00,  //7
	0x0f,  //8
	0x0b,  //9
};
/*  段码高8（右） */
static uint8_t num_H[10] = {
	0x07,
	0x06,
	0x03,
	0x07,//3
	0x06,//4
	0x05, //5
	0x05, //
	0x07, //7
	0x07, //8
	0x07, //9
};

定义显示7-0位数码LCD如下：

void show_num(int8_t num)
{
				//显示第7个数码管
			CW_LCD- >RAM0 = num_H[num]< < 8 | num_L[num];
			//显示第6个数码管
			CW_LCD- >RAM0 |= (num_H[num]< < 8 | num_L[num]) < < 16;
			
			//显示第5个数码管
			CW_LCD- >RAM1 = num_L[num];
			CW_LCD- >RAM8 = num_H[num];
			
			//显示第4个数码管
			CW_LCD- >RAM8 |= num_H[num]< < 16 | num_L[num]< < 8;
			
			//显示第3个数码管
			CW_LCD- >RAM8 |= num_L[num]< < 24;
                       CW_LCD- >RAM9 = num_H[num];

			//显示第2个数码管
			CW_LCD- >RAM9 |= num_H[num]< < 16 | num_L[num]< < 8;
			
			//显示第1个数码管
			CW_LCD- >RAM1 |= num_H[num]< < 8;
			CW_LCD- >RAM9 |= num_L[num]< < 24;
			//显示第0个数码管
			CW_LCD- >RAM1 |= num_H[num]< < 24 | num_L[num]< < 16;
	
}

main主函数程序如下：

#include "main.h"
void RCC_Configuration(void);

int32_t main(void)
{
    uint8_t i=0;
    CW_SYSCTRL- >AHBEN_f.GPIOC = 1U;    //Open GPIOA Clk

    CW_GPIOC- >ANALOG_f.PIN2 = 0U;      //Digital
    CW_GPIOC- >BRR_f.BRR2 = 1U;         //Reset PA00
    CW_GPIOC- >DIR_f.PIN2 = 0U;         //Output
		RCC_Configuration();
		LCD_Configuration();
    while(1)
    {
        CW_GPIOC- >TOG = bv2;
        FirmwareDelay( 8000000 );

			//从零显示到8
			show_num(i);
			
			i++;
			if(i==10)
			i=0;

    }

}

void RCC_Configuration(void)
{
    /* 0. HSI使能并校准 */
//  RCC_HSI_OUT();
    RCC_HSI_Enable(RCC_HSIOSC_DIV6);

    /* 1. 设置HCLK和PCLK的分频系数*/
    RCC_HCLKPRS_Config(RCC_HCLK_DIV1);
    RCC_PCLKPRS_Config(RCC_PCLK_DIV1);

//  RCC_HCLK_OUT();

//   __breakpoint(0);

    /* 2. 使能PLL，通过HSI倍频到64MHz */
    RCC_PLL_Enable(RCC_PLLSOURCE_HSI, 8000000, RCC_PLL_MUL_8); // HSI 默认输出频率8MHz
//  RCC_PLL_OUT();

    ///< 当使用的时钟源HCLK大于24M,小于等于48MHz：设置FLASH 读等待周期为2 cycle
    ///< 当使用的时钟源HCLK大于48M,小于等于72MHz：设置FLASH 读等待周期为3 cycle
    __RCC_FLASH_CLK_ENABLE();
    FLASH_SetLatency(FLASH_Latency_3);

    /* 3. 时钟切换到PLL */
    RCC_SysClk_Switch(RCC_SYSCLKSRC_PLL);
    RCC_SystemCoreClockUpdate(64000000);

    /* 4. 配置外设时钟 */
//  __RCC_GPIOF_CLK_ENABLE();
//  __RCC_GPIOE_CLK_ENABLE();
//  __RCC_GPIOD_CLK_ENABLE();
//  __RCC_GPIOC_CLK_ENABLE();
//  __RCC_GPIOB_CLK_ENABLE();
//  __RCC_GPIOA_CLK_ENABLE();
//  __RCC_LCD_CLK_ENABLE();

}