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/*
* vga.h
*
* Created on: Jul 8, 2017
* Author: spinalvm
*/
#ifndef VGA_H_
#define VGA_H_
#include <stdint.h>
typedef struct {
uint32_t hSyncStart ,hSyncEnd;
uint32_t hColorStart,hColorEnd;
uint32_t vSyncStart ,vSyncEnd;
uint32_t vColorStart,vColorEnd;
}Vga_Timing;
static const Vga_Timing vga_h640_v480_r60 = {
.hSyncStart = 96,
.hSyncEnd = 800,
.hColorStart = 96 + 16,
.hColorEnd = 800 - 48,
.vSyncStart = 2,
.vSyncEnd = 525,
.vColorStart = 2 + 10,
.vColorEnd = 525 - 33
};
static const Vga_Timing vga_simRes = {
.hSyncStart = 8,
.hSyncEnd = 70,
.hColorStart = 16,
.hColorEnd = 64,
.vSyncStart = 2,
.vSyncEnd = 48,
.vColorStart = 8,
.vColorEnd = 40
};
static const Vga_Timing vga_simRes_h160_v120 = {
.hSyncStart = 8,
.hSyncEnd = 24+160,
.hColorStart = 16,
.hColorEnd = 16+160,
.vSyncStart = 2,
.vSyncEnd = 10+120,
.vColorStart = 6,
.vColorEnd = 6+120
};
typedef struct
{
volatile uint32_t STATUS;
volatile uint32_t FRAME_SIZE;
volatile uint32_t FRAME_BASE;
volatile uint32_t DUMMY0[13];
volatile Vga_Timing TIMING;
} Vga_Reg;
static uint32_t vga_isBusy(Vga_Reg *reg){
return (reg->STATUS & 2) != 0;
}
static void vga_run(Vga_Reg *reg){
reg->STATUS = 1;
}
static void vga_stop(Vga_Reg *reg){
reg->STATUS = 0;
while(vga_isBusy(reg));
}
#endif /* VGA_H_ */
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