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rt-thread-official/bsp/imxrt/Libraries/imxrt1050/drivers/drv_lcd.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-10-30 Tanek the first version
* 2018-04-05 Liu2guang export LCD config parameters.
*/
#include "drv_lcd.h"
#include "fsl_common.h"
#include "fsl_iomuxc.h"
#include "fsl_elcdif.h"
#if !defined(LCD_WIDTH) || !defined(LCD_HEIGHT)
#error "Please config lcd pixel parameters."
#endif
#if !defined(LCD_HFP) || !defined(LCD_HBP) || !defined(LCD_HSW) || \
!defined(LCD_VFP) || !defined(LCD_VBP) || !defined(LCD_VSW)
#error "Please config lcd timing parameters."
#endif
#if !defined(LCD_BL_PIN) || !defined(LCD_RST_PIN)
#error "Please config lcd backlight or reset pin."
#endif
struct rt1050_lcd
{
struct rt_device device;
struct rt_device_graphic_info info;
};
static struct rt1050_lcd lcd;
static volatile int fb_index = 0;
static volatile rt_bool_t fb_modified = RT_TRUE;
ALIGN(64) static uint16_t frame_buffer0[LCD_HEIGHT][LCD_WIDTH] SECTION("NonCacheable");
ALIGN(64) static uint16_t frame_buffer1[LCD_HEIGHT][LCD_WIDTH] SECTION("NonCacheable");
static rt_err_t rt1050_lcd_init(rt_device_t device)
{
RT_ASSERT(device != RT_NULL);
memset(frame_buffer0, 0x00, sizeof(frame_buffer0));
memset(frame_buffer1, 0x00, sizeof(frame_buffer1));
/* DeInit Video PLL. */
CLOCK_DeinitVideoPll();
/*
* Initialize the Video PLL.
* Video PLL output clock is OSC24M * (loopDivider + (denominator / numerator)) / postDivider = 93MHz.
*/
clock_video_pll_config_t config =
{
.loopDivider = 31, .postDivider = 8, .numerator = 0, .denominator = 1,
};
CLOCK_InitVideoPll(&config);
/*
* 000 derive clock from PLL2
* 001 derive clock from PLL3 PFD3
* 010 derive clock from PLL5
* 011 derive clock from PLL2 PFD0
* 100 derive clock from PLL2 PFD1
* 101 derive clock from PLL3 PFD1
*/
CLOCK_SetMux(kCLOCK_LcdifPreMux, 2);
CLOCK_SetDiv(kCLOCK_LcdifPreDiv, 4);
CLOCK_SetDiv(kCLOCK_LcdifDiv, 1);
/* GPIO */
CLOCK_EnableClock(kCLOCK_Iomuxc);
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_04_LCD_DATA00, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_04_LCD_DATA00, 0x01B0B0U); /* LCD_B3 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_05_LCD_DATA01, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_05_LCD_DATA01, 0x01B0B0U); /* LCD_B4 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_06_LCD_DATA02, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_06_LCD_DATA02, 0x01B0B0U); /* LCD_B5 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_07_LCD_DATA03, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_07_LCD_DATA03, 0x01B0B0U); /* LCD_B6 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_08_LCD_DATA04, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_08_LCD_DATA04, 0x01B0B0U); /* LCD_B7 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_09_LCD_DATA05, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_09_LCD_DATA05, 0x01B0B0U); /* LCD_G2 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_10_LCD_DATA06, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_10_LCD_DATA06, 0x01B0B0U); /* LCD_G3 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_11_LCD_DATA07, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_11_LCD_DATA07, 0x01B0B0U); /* LCD_G4 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_12_LCD_DATA08, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_12_LCD_DATA08, 0x01B0B0U); /* LCD_G5 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_13_LCD_DATA09, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_13_LCD_DATA09, 0x01B0B0U); /* LCD_G6 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_14_LCD_DATA10, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_14_LCD_DATA10, 0x01B0B0U); /* LCD_G7 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_15_LCD_DATA11, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_15_LCD_DATA11, 0x01B0B0U); /* LCD_R3 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B1_00_LCD_DATA12, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_00_LCD_DATA12, 0x01B0B0U); /* LCD_R4 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B1_01_LCD_DATA13, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_01_LCD_DATA13, 0x01B0B0U); /* LCD_R5 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B1_02_LCD_DATA14, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_02_LCD_DATA14, 0x01B0B0U); /* LCD_R6 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B1_03_LCD_DATA15, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_03_LCD_DATA15, 0x01B0B0U); /* LCD_R7 */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_00_LCD_CLK, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_00_LCD_CLK, 0x01B0B0u); /* LCD_CLK */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_02_LCD_HSYNC, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_02_LCD_HSYNC, 0x01B0B0u); /* LCD_HSYNC */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_03_LCD_VSYNC, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_03_LCD_VSYNC, 0x01B0B0u); /* LCD_VSYNC */
IOMUXC_SetPinMux(IOMUXC_GPIO_B0_01_LCD_ENABLE, 0U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_B0_01_LCD_ENABLE, 0x01B0B0u); /* LCD_ENABLE */
rt_pin_mode(LCD_RST_PIN, PIN_MODE_OUTPUT); /* LCD_RESET */
rt_pin_write(LCD_RST_PIN, PIN_LOW);
rt_thread_delay(RT_TICK_PER_SECOND / 100);
rt_pin_write(LCD_RST_PIN, PIN_HIGH);
rt_pin_mode(LCD_BL_PIN, PIN_MODE_OUTPUT); /* LCD_BL */
rt_pin_write(LCD_BL_PIN, PIN_HIGH);
/* LCD */
elcdif_rgb_mode_config_t lcd_config;
lcd_config.hfp = LCD_HFP;
lcd_config.vfp = LCD_VFP;
lcd_config.hbp = LCD_HBP;
lcd_config.vbp = LCD_VBP;
lcd_config.hsw = LCD_HSW;
lcd_config.vsw = LCD_VSW;
lcd_config.polarityFlags = kELCDIF_DataEnableActiveHigh |
kELCDIF_VsyncActiveHigh |
kELCDIF_HsyncActiveLow |
kELCDIF_DriveDataOnRisingClkEdge;
lcd_config.panelWidth = LCD_WIDTH;
lcd_config.panelHeight = LCD_HEIGHT;
lcd_config.pixelFormat = kELCDIF_PixelFormatRGB565;
lcd_config.dataBus = kELCDIF_DataBus16Bit;
lcd_config.bufferAddr = (uint32_t)frame_buffer0;
ELCDIF_RgbModeInit(LCDIF, &lcd_config);
ELCDIF_RgbModeStart(LCDIF);
/* LCD DEVICE */
lcd.info.width = LCD_WIDTH;
lcd.info.height = LCD_HEIGHT;
lcd.info.pixel_format = RTGRAPHIC_PIXEL_FORMAT_RGB565;
lcd.info.bits_per_pixel = 16;
lcd.info.framebuffer = (void *)rt_malloc_align(LCD_WIDTH * LCD_HEIGHT * 2, 32);
return RT_EOK;
}
void LCDIF_IRQHandler(void)
{
uint32_t intStatus;
intStatus = ELCDIF_GetInterruptStatus(LCDIF);
ELCDIF_ClearInterruptStatus(LCDIF, intStatus);
if (intStatus & kELCDIF_CurFrameDone)
{
fb_modified = RT_TRUE;
}
}
static rt_err_t rt1050_lcd_control(rt_device_t device, int cmd, void *args)
{
switch (cmd)
{
case RTGRAPHIC_CTRL_RECT_UPDATE:
{
uint8_t *ptr;
if (fb_index == 0)
{
ptr = (uint8_t *)&frame_buffer1[0];
}
else
{
ptr = (uint8_t *)&frame_buffer0[0];
}
while(LCDIF->CUR_BUF != LCDIF->NEXT_BUF);
memcpy(ptr, lcd.info.framebuffer, LCD_WIDTH * LCD_HEIGHT * 2);
if (fb_index == 0)
{
/* use fb1 */
ELCDIF_SetNextBufferAddr(LCDIF, (uint32_t)&frame_buffer1[0]);
fb_index = 1;
}
else
{
/* use fb0 */
ELCDIF_SetNextBufferAddr(LCDIF, (uint32_t)&frame_buffer0[0]);
fb_index = 0;
}
}
break;
case RTGRAPHIC_CTRL_POWERON:
rt_pin_write(LCD_BL_PIN, PIN_HIGH);
break;
case RTGRAPHIC_CTRL_POWEROFF:
rt_pin_write(LCD_BL_PIN, PIN_LOW);
break;
case RTGRAPHIC_CTRL_GET_INFO:
memcpy(args, &lcd.info, sizeof(lcd.info));
break;
case RTGRAPHIC_CTRL_SET_MODE:
break;
}
return RT_EOK;
}
int rt_hw_lcd_init(void)
{
rt_err_t ret;
lcd.device.type = RT_Device_Class_Graphic;
lcd.device.init = rt1050_lcd_init;
lcd.device.open = RT_NULL;
lcd.device.close = RT_NULL;
lcd.device.read = RT_NULL;
lcd.device.write = RT_NULL;
lcd.device.control = rt1050_lcd_control;
lcd.device.user_data = (void *)&lcd.info;
ret = rt_device_register(&lcd.device, "lcd", RT_DEVICE_FLAG_RDWR);
return ret;
}
INIT_DEVICE_EXPORT(rt_hw_lcd_init);
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