環境
- 開發板：正點原子探索者
- 芯片：STM32F407ZGT6
- 系統：RT-Thread
- 屏幕型號：TFTLCD 55510 4.3寸
- 開發軟件：Keil，CubeMX， Env
目的
現在將裸板上的LCD程序，移植到RT-thread上，裸板程序有lcd.c 和lcd.h，front.h
過程
使用F4芯片的FSMC來控制LCD，類似與將LCD當初存儲設備SRAM，利用 CubeMX來進行配置
在 FSMC的bank1下的NE4下配置LCD。這樣的話芯片與LCD對應的GPIO接口都可以被配置
配置完成後再打開env，生成mdk5工程
把lcd的相關代碼文件，放到新工程中，這裏與main放在一起
lcd.c需要修改一下，LCD_init原本有時鐘使能,GPIO配置，引腳複用的配置，都清除，CubeMX圖形配置會做這些事。有些裸板上的頭文件也可以去掉，換成rt-thread常用的頭文件。FSMC的配置放到main裏
另外在把對應的延時函數，換成rt-thread上的對應函數，gpio的使用接口也要替換，例如點亮LCD背光的部分
LCD_Display_Dir(0); //默認爲豎屏
rt_pin_mode(LCD_PIN, PIN_MODE_OUTPUT);
rt_pin_write(LCD_PIN, PIN_HIGH); //點亮背光
LCD_Clear(WHITE);
這裏需要添加下面兩個庫文件，main函數中對FSMC初始化要用到
在main函數中添加MX_FSMC_Init，進行FSMC的初始話，lcd_display在LCD上顯示
SRAM_HandleTypeDef hsram1;
static void MX_FSMC_Init(void)
{
/* USER CODE BEGIN FSMC_Init 0 */
/* USER CODE END FSMC_Init 0 */
FSMC_NORSRAM_TimingTypeDef Timing = {0};
FSMC_NORSRAM_TimingTypeDef ExtTiming = {0};
/* USER CODE BEGIN FSMC_Init 1 */
/* USER CODE END FSMC_Init 1 */
/** Perform the SRAM1 memory initialization sequence
*/
hsram1.Instance = FSMC_NORSRAM_DEVICE;
hsram1.Extended = FSMC_NORSRAM_EXTENDED_DEVICE;
/* hsram1.Init */
hsram1.Init.NSBank = FSMC_NORSRAM_BANK4;
hsram1.Init.DataAddressMux = FSMC_DATA_ADDRESS_MUX_DISABLE;
hsram1.Init.MemoryType = FSMC_MEMORY_TYPE_SRAM;
hsram1.Init.MemoryDataWidth = FSMC_NORSRAM_MEM_BUS_WIDTH_16;
hsram1.Init.BurstAccessMode = FSMC_BURST_ACCESS_MODE_DISABLE;
hsram1.Init.WaitSignalPolarity = FSMC_WAIT_SIGNAL_POLARITY_LOW;
hsram1.Init.WrapMode = FSMC_WRAP_MODE_DISABLE;
hsram1.Init.WaitSignalActive = FSMC_WAIT_TIMING_BEFORE_WS;
hsram1.Init.WriteOperation = FSMC_WRITE_OPERATION_ENABLE;
hsram1.Init.WaitSignal = FSMC_WAIT_SIGNAL_DISABLE;
hsram1.Init.ExtendedMode = FSMC_EXTENDED_MODE_ENABLE;
hsram1.Init.AsynchronousWait = FSMC_ASYNCHRONOUS_WAIT_DISABLE;
hsram1.Init.WriteBurst = FSMC_WRITE_BURST_DISABLE;
/* Timing */
Timing.AddressSetupTime = 15;
Timing.AddressHoldTime = 0;
Timing.DataSetupTime = 24;
Timing.BusTurnAroundDuration = 0;
Timing.CLKDivision = 0;
Timing.DataLatency = 0;
Timing.AccessMode = FSMC_ACCESS_MODE_A;
/* ExtTiming */
ExtTiming.AddressSetupTime = 8;
ExtTiming.AddressHoldTime = 15;
ExtTiming.DataSetupTime = 8;
ExtTiming.BusTurnAroundDuration = 0;
ExtTiming.CLKDivision = 0;
ExtTiming.DataLatency = 0;
ExtTiming.AccessMode = FSMC_ACCESS_MODE_A;
if (HAL_SRAM_Init(&hsram1, &Timing, &ExtTiming) != HAL_OK)
{
Error_Handler( );
}
/** Disconnect NADV
*/
// __HAL_AFIO_FSMCNADV_DISCONNECTED();
/* USER CODE BEGIN FSMC_Init 2 */
/* USER CODE END FSMC_Init 2 */
}
static int lcd_display(void)
{
u8 x=0;
u8 lcd_id[12]; //存放LCD ID字符串
LCD_Init(); //初始化LCD FSMC接口
POINT_COLOR=RED; //畫筆顏色：紅色
sprintf((char*)lcd_id,"LCD ID:%04X",lcddev.id);//將LCD ID打印到lcd_id數組。
while(1)
{
switch(x)
{
case 0:LCD_Clear(WHITE);break;
case 1:LCD_Clear(BLACK);break;
case 2:LCD_Clear(BLUE);break;
case 3:LCD_Clear(RED);break;
case 4:LCD_Clear(MAGENTA);break;
case 5:LCD_Clear(GREEN);break;
case 6:LCD_Clear(CYAN);break;
case 7:LCD_Clear(YELLOW);break;
case 8:LCD_Clear(BRRED);break;
case 9:LCD_Clear(GRAY);break;
case 10:LCD_Clear(LGRAY);break;
case 11:LCD_Clear(BROWN);break;
}
POINT_COLOR=RED;
LCD_ShowString(30,40,210,24,24,"Explorer STM32F4");
LCD_ShowString(30,70,200,16,16,"TFTLCD TEST");
LCD_ShowString(30,90,200,16,16,"RT-thread");
LCD_ShowString(30,110,200,16,16,lcd_id); //顯示LCD ID
LCD_ShowString(30,130,200,12,12,"2014/5/4");
x++;
if(x==12)x=0;
rt_pin_write(LED0_PIN, PIN_HIGH);
rt_thread_mdelay(500);
rt_pin_write(LED0_PIN, PIN_LOW);
rt_thread_mdelay(500);
}
}
MSH_CMD_EXPORT(lcd_display, lcd_display samole);
上電啓動並在uart串口上顯示的輸入命令lcd_display,即可正常顯示
