STM32+OV7725用了printf函数，液晶屏就不显示

b22c7944ec0689c2

• 2020-07-04

为什么使用了printf函数，液晶屏就不显示了void OV7725_camera_refresh(void){u32 ij;  u16 colordata;  if(ov_sta){LCD_Scan_Dir(U2D_L2R);LCD_Set_Window((lcddev.width-320)/2(lcddev.height-240)/2320240);LCD_WriteRAM_Prepare();   OV7725_RRST=0; OV7725_RCK_L;OV7725_RCK_H;OV7725_RCK_L;OV7725_RRST=1; OV7725_RCK_H; for(i=0;i<240;i++){for(j=0;j<320;j++){OV7725_RCK_L;color=GPIOC->IDR&0XFF; OV7725_RCK_H; color<<=8;  OV7725_RCK_L;color|=GPIOC->IDR&0XFF; OV7725_RCK_H; LCD->LCD_RAM=color;printf（“%d”，color）}}  ov_sta=0; LCD_Scan_Dir(DFT_SCAN_DIR); }