86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
#include <cstdint>
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#include "sh7091/serial.hpp"
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#include "dve.hpp"
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#include "holly.hpp"
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#include "holly_bits.hpp"
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#include "video_output.hpp"
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namespace video_output {
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void set_framebuffer_resolution(const uint32_t x_size, const uint32_t y_size)
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{
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holly.Y_COEFF = y_coeff::coefficient_1(0x80)
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| y_coeff::coefficient_0_2(0x40);
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// in 6.10 fixed point; 0x0400 is 1x vertical scale
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holly.SCALER_CTL = scaler_ctl::vertical_scale_factor(0x0400);
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holly.FB_BURSTCTRL = fb_burstctrl::wr_burst(0x09)
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| fb_burstctrl::vid_lat(0x3f)
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| fb_burstctrl::vid_burst(0x39);
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holly.FB_X_CLIP = fb_x_clip::fb_x_clip_max(x_size - 1)
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| fb_x_clip::fb_x_clip_min(0);
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holly.FB_Y_CLIP = fb_y_clip::fb_y_clip_max(y_size - 1)
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| fb_y_clip::fb_y_clip_min(0);
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holly.FB_R_SIZE = fb_r_size::fb_modulus(1)
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| fb_r_size::fb_y_size(y_size - 3)
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| fb_r_size::fb_x_size((x_size * 16) / 32 - 1);
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}
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void set_mode(const struct mode& mode)
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{
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holly.FB_R_CTRL = mode.fb_r_ctrl
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| fb_r_ctrl::fb_depth::_0565_rgb_16bit
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| fb_r_ctrl::fb_enable;
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holly.SPG_LOAD = mode.spg_load;
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holly.SPG_HBLANK = mode.spg_hblank;
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holly.SPG_VBLANK = mode.spg_vblank;
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holly.SPG_WIDTH = mode.spg_width;
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holly.SPG_CONTROL = mode.spg_control;
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holly.VO_STARTX = mode.vo_startx;
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holly.VO_STARTY = mode.vo_starty;
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holly.VO_CONTROL = mode.vo_control;
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holly.SPG_HBLANK_INT = mode.spg_hblank_int;
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holly.SPG_VBLANK_INT = mode.spg_vblank_int;
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}
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uint32_t get_cable_type()
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{
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// set all pins to input
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sh7091.BSC.PCTRA = 0;
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// get cable type from pins 9 + 8
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return sh7091.BSC.PDTRA & pdtra::cable_type::bit_mask;
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}
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void automatic()
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{
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switch (get_cable_type()) {
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case pdtra::cable_type::vga:
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set_mode(vga);
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set_framebuffer_resolution(640, 480);
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aica.common.VREG(vreg::output_mode::vga);
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break;
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case pdtra::cable_type::rgb:
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set_mode(ntsc_ni);
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set_framebuffer_resolution(320, 240);
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aica.common.VREG(vreg::output_mode::rgb);
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break;
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case pdtra::cable_type::cvbs_yc:
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set_mode(pal_ni);
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set_framebuffer_resolution(320, 240);
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aica.common.VREG(vreg::output_mode::cvbs_yc);
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break;
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}
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}
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}
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