234 lines
7.7 KiB
C
234 lines
7.7 KiB
C
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/*
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* File :display_controller.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2011-08-09 lgnq first version for LS1B DC
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* 2015-07-06 chinesebear modified for loongson 1c
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* 2018-01-06 sundm75 modified for smartloong
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*/
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#include <rtthread.h>
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#include "display_controller.h"
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#include "../../libraries/ls1c_pwm.h"
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#include "../../libraries/ls1c_public.h"
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#include "../../libraries/ls1c_gpio.h"
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struct vga_struct vga_mode[] =
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{
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{/*"480x272_60.00"*/ 111000, 480, 482, 523, 525, 272, 274, 284, 286, },
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{/*"640x480_70.00"*/ 28560, 640, 664, 728, 816, 480, 481, 484, 500, },
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{/*"640x640_60.00"*/ 33100, 640, 672, 736, 832, 640, 641, 644, 663, },
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{/*"640x768_60.00"*/ 39690, 640, 672, 736, 832, 768, 769, 772, 795, },
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{/*"640x800_60.00"*/ 42130, 640, 680, 744, 848, 800, 801, 804, 828, },
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{/*"800x480_70.00"*/ 35840, 800, 832, 912, 1024, 480, 481, 484, 500, },
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{/*"800x600_60.00"*/ 38220, 800, 832, 912, 1024, 600, 601, 604, 622, },
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{/*"800x640_60.00"*/ 40730, 800, 832, 912, 1024, 640, 641, 644, 663, },
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{/*"832x600_60.00"*/ 40010, 832, 864, 952, 1072, 600, 601, 604, 622, },
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{/*"832x608_60.00"*/ 40520, 832, 864, 952, 1072, 608, 609, 612, 630, },
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{/*"1024x480_60.00"*/ 38170, 1024, 1048, 1152, 1280, 480, 481, 484, 497, },
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{/*"1024x600_60.00"*/ 48960, 1024, 1064, 1168, 1312, 600, 601, 604, 622, },
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{/*"1024x640_60.00"*/ 52830, 1024, 1072, 1176, 1328, 640, 641, 644, 663, },
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{/*"1024x768_60.00"*/ 64110, 1024, 1080, 1184, 1344, 768, 769, 772, 795, },
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{/*"1152x764_60.00"*/ 71380, 1152, 1208, 1328, 1504, 764, 765, 768, 791, },
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{/*"1280x800_60.00"*/ 83460, 1280, 1344, 1480, 1680, 800, 801, 804, 828, },
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{/*"1280x1024_55.00"*/ 98600, 1280, 1352, 1488, 1696, 1024, 1025, 1028, 1057, },
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{/*"1440x800_60.00"*/ 93800, 1440, 1512, 1664, 1888, 800, 801, 804, 828, },
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{/*"1440x900_67.00"*/ 120280, 1440, 1528, 1680, 1920, 900, 901, 904, 935, },
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};
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ALIGN(16)
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volatile rt_uint16_t _rt_framebuffer[FB_YSIZE][FB_XSIZE];
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static struct rt_device_graphic_info _dc_info;
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static void pwminit(void)
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{
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pwm_info_t pwm_info;
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pwm_info.gpio = LS1C_PWM0_GPIO06; // pwm引脚位gpio06
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pwm_info.mode = PWM_MODE_NORMAL; // 正常模式--连续输出pwm波形
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pwm_info.duty = 0.85; // pwm占空比 85%
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pwm_info.period_ns = 5*1000*1000; // pwm周期5ms
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/*pwm初始化，初始化后立即产生pwm波形*/
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pwm_init(&pwm_info);
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/* 使能pwm */
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pwm_enable(&pwm_info);
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}
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int caclulate_freq(rt_uint32_t XIN, rt_uint32_t PCLK)
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{
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rt_uint32_t divider_int;
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rt_uint32_t needed_pixclk;
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rt_uint32_t pll_clk, pix_div;
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rt_uint32_t regval;
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pll_clk = PLL_FREQ; // 读CPU的 PLL及SDRAM 分频系数
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pll_clk =( pll_clk>>8 )& 0xff;
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pll_clk = XIN * pll_clk / 4 ;
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pix_div = PLL_DIV_PARAM;//读CPU的 CPU/CAMERA/DC 分频系数
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pix_div = (pix_div>>24)&0xff;
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rt_kprintf("old pll_clk=%d, pix_div=%d\n", pll_clk, pix_div);
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divider_int = pll_clk/(1000000) *PCLK/1000;
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if(divider_int%1000>=500)
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divider_int = divider_int/1000+1;
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else
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divider_int = divider_int/1000;
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rt_kprintf("divider_int = %d\n", divider_int);
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/* check whether divisor is too small. */
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if (divider_int < 1) {
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rt_kprintf("Warning: clock source is too slow.Try smaller resolution\n");
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divider_int = 1;
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}
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else if(divider_int > 100) {
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rt_kprintf("Warning: clock source is too fast.Try smaller resolution\n");
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divider_int = 100;
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}
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/* 配置分频寄存器 */
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{
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rt_uint32_t regval = 0;
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regval = PLL_DIV_PARAM;
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/*首先需要把分频使能位清零 */
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regval &= ~0x80000030; //PIX_DIV_VALID PIX_SEL 置0
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regval &= ~(0x3f<<24); //PIX_DIV 清零
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regval |= divider_int << 24;
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PLL_DIV_PARAM = regval;
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regval |= 0x80000030; //PIX_DIV_VALID PIX_SEL 置1
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PLL_DIV_PARAM = regval;
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}
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rt_kprintf("new PLL_FREQ=0x%x, PLL_DIV_PARAM=0x%x\n", PLL_FREQ, PLL_DIV_PARAM);
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rt_thread_delay(10);
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return 0;
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}
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static rt_err_t rt_dc_init(rt_device_t dev)
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{
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int i, out, mode=-1;
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int val;
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rt_kprintf("PWM initied\n");
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/* Set the back light PWM. */
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pwminit();
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for (i=0; i<sizeof(vga_mode)/sizeof(struct vga_struct); i++)
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{
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if (vga_mode[i].hr == FB_XSIZE && vga_mode[i].vr == FB_YSIZE)
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{
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mode=i;
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/* 计算时钟 配置频率*/
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caclulate_freq(OSC, vga_mode[i].pclk);
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break;
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}
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}
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if (mode<0)
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{
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rt_kprintf("\n\n\nunsupported framebuffer resolution\n\n\n");
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return;
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}
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DC_FB_CONFIG = 0x0;
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DC_FB_CONFIG = 0x3; // // framebuffer configuration RGB565
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DC_FB_BUFFER_ADDR0 = (rt_uint32_t)_rt_framebuffer - 0x80000000;
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DC_FB_BUFFER_ADDR1 = (rt_uint32_t)_rt_framebuffer - 0x80000000;
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DC_DITHER_CONFIG = 0x0; //颜色抖动配置寄存器
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DC_DITHER_TABLE_LOW = 0x0; //颜色抖动查找表低位寄存器
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DC_DITHER_TABLE_HIGH = 0x0; //颜色抖动查找表高位寄存器
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DC_PANEL_CONFIG = 0x80001311; //液晶面板配置寄存器
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DC_PANEL_TIMING = 0x0;
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DC_HDISPLAY = (vga_mode[mode].hfl<<16) | vga_mode[mode].hr;
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DC_HSYNC = 0x40000000 | (vga_mode[mode].hse<<16) | vga_mode[mode].hss;
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DC_VDISPLAY = (vga_mode[mode].vfl<<16) | vga_mode[mode].vr;
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DC_VSYNC = 0x40000000 | (vga_mode[mode].vse<<16) | vga_mode[mode].vss;
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#if defined(CONFIG_VIDEO_32BPP)
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DC_FB_CONFIG = 0x00100105;
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DC_FB_BUFFER_STRIDE = FB_XSIZE*4;
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#elif defined(CONFIG_VIDEO_24BPP)
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DC_FB_CONFIG = 0x00100104;
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DC_FB_BUFFER_STRIDE = (FB_XSIZE*4+255)&(~255);
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#elif defined(CONFIG_VIDEO_16BPP)// 使用这个选项
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DC_FB_CONFIG = 0x00100103;
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DC_FB_BUFFER_STRIDE = (FB_XSIZE*2+255)&(~255);
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#elif defined(CONFIG_VIDEO_15BPP)
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DC_FB_CONFIG = 0x00100102;
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DC_FB_BUFFER_STRIDE = (FB_XSIZE*2+255)&(~255);
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#elif defined(CONFIG_VIDEO_12BPP)
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DC_FB_CONFIG = 0x00100101;
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DC_FB_BUFFER_STRIDE = (FB_XSIZE*2+255)&(~255);
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#else
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DC_FB_CONFIG = 0x00100104;
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DC_FB_BUFFER_STRIDE = (FB_XSIZE*4+255)&(~255);
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#endif
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return RT_EOK;
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}
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static rt_err_t rt_dc_control(rt_device_t dev, int cmd, void *args)
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{
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switch (cmd)
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{
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case RTGRAPHIC_CTRL_RECT_UPDATE:
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break;
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case RTGRAPHIC_CTRL_POWERON:
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break;
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case RTGRAPHIC_CTRL_POWEROFF:
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break;
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case RTGRAPHIC_CTRL_GET_INFO:
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rt_memcpy(args, &_dc_info, sizeof(_dc_info));
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break;
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case RTGRAPHIC_CTRL_SET_MODE:
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break;
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}
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return RT_EOK;
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}
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void rt_hw_dc_init(void)
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{
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rt_device_t dc = rt_malloc(sizeof(struct rt_device));
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if (dc == RT_NULL)
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{
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rt_kprintf("dc == RT_NULL\n");
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return; /* no memory yet */
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}
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_dc_info.bits_per_pixel = 16;
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_dc_info.pixel_format = RTGRAPHIC_PIXEL_FORMAT_RGB565P;
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_dc_info.framebuffer = (rt_uint8_t*)HW_FB_ADDR;
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_dc_info.width = FB_XSIZE;
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_dc_info.height = FB_YSIZE;
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/* init device structure */
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dc->type = RT_Device_Class_Graphic;
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dc->init = rt_dc_init;
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dc->open = RT_NULL;
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dc->close = RT_NULL;
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dc->control = rt_dc_control;
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dc->user_data = (void*)&_dc_info;
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/* register Display Controller device to RT-Thread */
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rt_device_register(dc, "dc", RT_DEVICE_FLAG_RDWR);
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rt_device_init(dc);
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}
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