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Merge pull request #1529 from TanekLiang/imxrt-lcd-update

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[bsp][imxrt1052] update lcd driver and add lcd init code
This commit is contained in:
Bernard Xiong 2018-06-12 21:05:26 +08:00 committed by GitHub
commit 35a0e8e8c9
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2 changed files with 187 additions and 129 deletions
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42
bsp/imxrt1052-evk/applications/lcd_init.c Normal file
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@ -0,0 +1,42 @@
/*
* File : lcd_init.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2018-06-12 Tanek first version
*/
#include <rtthread.h>
#if defined(PKG_USING_GUIENGINE)
#include <rtgui/driver.h>
int lcd_init(void)
{
struct rt_device *device;
device = rt_device_find("lcd");
if (device)
{
rtgui_graphic_set_device(device);
}
return 0;
}
INIT_APP_EXPORT(lcd_init);
#endif

36
bsp/imxrt1052-evk/drivers/drv_lcd.c
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@ -47,15 +47,33 @@ static rt_err_t rt1050_lcd_init(rt_device_t device)
rt_memset(frame_buffer, 0x00, sizeof(frame_buffer));
/* DeInit Video PLL. */
CLOCK_DeinitVideoPll();
/* Bypass Video PLL. */
CCM_ANALOG->PLL_VIDEO |= CCM_ANALOG_PLL_VIDEO_BYPASS_MASK;
/* Set divider for Video PLL. */
CCM_ANALOG->MISC2 = (CCM_ANALOG->MISC2 & (~CCM_ANALOG_MISC2_VIDEO_DIV_MASK)) | CCM_ANALOG_MISC2_VIDEO_DIV(0);
/* Enable Video PLL output. */
CCM_ANALOG->PLL_VIDEO |= CCM_ANALOG_PLL_VIDEO_ENABLE_MASK;
/*
* 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);
@ -186,10 +204,8 @@ int rt_hw_lcd_init(void)
lcd.device.user_data = (void *)&lcd.info;
rt1050_lcd_init(&lcd.device);
ret = rt_device_register(&lcd.device, "lcd", RT_DEVICE_FLAG_RDWR);
return ret;
}
//INIT_DEVICE_EXPORT(rt_hw_lcd_init);
INIT_DEVICE_EXPORT(rt_hw_lcd_init);