上一篇寫(xiě)了GPIO簡(jiǎn)單的流水燈測(cè)試，看著有點(diǎn)單調(diào)，習(xí)慣了串口調(diào)試，板子上沒(méi)有串口 那就另想辦法吧，看著LCD突然有了個(gè)想法，為什么不把調(diào)試信息輸出到LCD上，以前在做2416 WINCE開(kāi)發(fā)的時(shí)候就經(jīng)常這樣干非常直觀，那說(shuō)干就干。

STM32F429I-DISO SDK里已經(jīng)把開(kāi)發(fā)包做好，那就直接拿過(guò)來(lái)用吧。

#define MESSAGE1 "STM32F429I-Discoverry" //提示信息

#define MESSAGE1_1 " GPIO TEST "

#define MESSAGE2 " LED3 LED4 "

#define MESSAGE2_1 " ^-^ "

#define MESSAGE5 " LED3 = %d" //LED3狀態(tài) 1亮 0滅

#define MESSAGE6 " LED4 = %d" //LED4狀態(tài)

#define LINENUM 0x15 //行數(shù)

#define FONTSIZE Font12x12 //字體大小

定義完了，那就該具體實(shí)現(xiàn)了，慣例先初始化 LCD初始化實(shí)現(xiàn)：

static void Display_Init(void)

{

/* Initialize the LCD */

LCD_Init();

LCD_LayerInit();

/* Eable the LTDC */

LTDC_Cmd(ENABLE);

/* Set LCD Background Layer */

LCD_SetLayer(LCD_BACKGROUND_LAYER);

/* Clear the Background Layer */

LCD_Clear(LCD_COLOR_WHITE);

/* Configure the transparency for background */

LCD_SetTransparency(0);

/* Set LCD Foreground Layer */

LCD_SetLayer(LCD_FOREGROUND_LAYER);

/* Configure the transparency for foreground */

LCD_SetTransparency(200);

/* Clear the Foreground Layer */

LCD_Clear(LCD_COLOR_WHITE);

/* Set the LCD Back Color and Text Color*/

LCD_SetBackColor(LCD_COLOR_BLUE);

LCD_SetTextColor(LCD_COLOR_WHITE);

/* Set the LCD Text size */

LCD_SetFont(&FONTSIZE);

/* Set the LCD Back Color and Text Color*/

LCD_SetBackColor(LCD_COLOR_BLUE);

LCD_SetTextColor(LCD_COLOR_WHITE);

LCD_DisplayStringLine(LINE(LINENUM), (uint8_t*)MESSAGE1);

LCD_DisplayStringLine(LINE(LINENUM + 1), (uint8_t*)MESSAGE1_1);

LCD_DisplayStringLine(LINE(0x17), (uint8_t*)" ");

/* Set the LCD Text size */

LCD_SetFont(&Font16x24);

LCD_DisplayStringLine(LCD_LINE_0, (uint8_t*)MESSAGE2);

LCD_DisplayStringLine(LCD_LINE_1, (uint8_t*)MESSAGE2_1);

/* Set the LCD Back Color and Text Color*/

LCD_SetBackColor(LCD_COLOR_WHITE);

LCD_SetTextColor(LCD_COLOR_BLUE);

}

初始化完成了，那就改實(shí)現(xiàn)顯示函數(shù)了

static void Display(void)

{

uint8_t led3 = 0, led4 = 0;

uint8_t aTextBuffer[50];

led3 = GPIO_ReadOutputDataBit(LED3_GPIO_PORT,LED3_PIN); //讀取LED3對(duì)應(yīng)引腳值

sprintf((char*)aTextBuffer, MESSAGE5, led3);

LCD_DisplayStringLine(LCD_LINE_4, (uint8_t*)aTextBuffer); //把LED3狀態(tài)更新到屏幕上

led4 = GPIO_ReadOutputDataBit(LED3_GPIO_PORT,LED4_PIN); //讀取LED4對(duì)應(yīng)引腳值

sprintf((char*)aTextBuffer, MESSAGE6, led4);

LCD_DisplayStringLine(LCD_LINE_6, (uint8_t*)aTextBuffer); //把LED4狀態(tài)更新到屏幕上

}

這就是顯示函數(shù)，讀取LED對(duì)應(yīng)的值，組成字符串，最后更新到LCD，LCD顯示。

接下來(lái)就改主函數(shù)了：

int main(void)

{

int i;

Display_Init();

LEDInit();

SysTickInit();

while (1)

{

Delay(500);

GPIO_SetBits(LED4_GPIO_PORT,LED4_PIN);

GPIO_ResetBits(LED3_GPIO_PORT,LED3_PIN);

Display();

Delay(500);

GPIO_SetBits(LED3_GPIO_PORT,LED3_PIN);

GPIO_ResetBits(LED4_GPIO_PORT,LED4_PIN);

Display();

}

}

慣例，主要函數(shù)部分實(shí)現(xiàn)完了，那就看最終的顯示結(jié)果吧.