board.c

00001 #include "board.h"
00002 #include "fsl_gpio.h"
00003 #include "fsl_clock_config.h"
00004 #include "emwin_support.h"
00005 
00006 /* Initialize the LCD_DISP. */
00007 void BOARD_InitLcd(void)
00008 {
00009     volatile uint32_t i = 0x100U;
00010 
00011     gpio_pin_config_t config = {
00012         kGPIO_DigitalOutput, 0,
00013     };
00014 
00015     /* Reset the LCD. */
00016     GPIO_PinInit(LCD_DISP_GPIO, LCD_DISP_GPIO_PIN, &config);
00017 
00018     GPIO_WritePinOutput(LCD_DISP_GPIO, LCD_DISP_GPIO_PIN, 0);
00019 
00020     while (i--)
00021     {
00022     }
00023 
00024     GPIO_WritePinOutput(LCD_DISP_GPIO, LCD_DISP_GPIO_PIN, 1);
00025 
00026     /* Backlight. */
00027     config.outputLogic = 1;
00028     GPIO_PinInit(LCD_BL_GPIO, LCD_BL_GPIO_PIN, &config);
00029 
00030     /*Clock setting for LPI2C*/
00031     CLOCK_SetMux(kCLOCK_Lpi2cMux, LPI2C_CLOCK_SOURCE_SELECT);
00032     CLOCK_SetDiv(kCLOCK_Lpi2cDiv, LPI2C_CLOCK_SOURCE_DIVIDER);
00033 }
00034 
00035 void BOARD_InitLcdifPixelClock(void)
00036 {
00037     /*
00038      * The desired output frame rate is 60Hz. So the pixel clock frequency is:
00039      * (480 + 41 + 4 + 18) * (272 + 10 + 4 + 2) * 60 = 9.2M.
00040      * Here set the LCDIF pixel clock to 9.3M.
00041      */
00042 
00043     /*
00044      * Initialize the Video PLL.
00045      * Video PLL output clock is OSC24M * (loopDivider + (denominator / numerator)) / postDivider = 93MHz.
00046      */
00047     clock_video_pll_config_t config = {
00048         .loopDivider = 31, .postDivider = 8, .numerator = 0, .denominator = 0,
00049     };
00050 
00051     CLOCK_InitVideoPll(&config);
00052 
00053     /*
00054      * 000 derive clock from PLL2
00055      * 001 derive clock from PLL3 PFD3
00056      * 010 derive clock from PLL5
00057      * 011 derive clock from PLL2 PFD0
00058      * 100 derive clock from PLL2 PFD1
00059      * 101 derive clock from PLL3 PFD1
00060      */
00061     CLOCK_SetMux(kCLOCK_LcdifPreMux, 2);
00062 
00063     CLOCK_SetDiv(kCLOCK_LcdifPreDiv, 4);
00064 
00065     CLOCK_SetDiv(kCLOCK_LcdifDiv, 1);
00066 }