mtv130.c

来自「该工程文件包含了 myson系列mtv018/130 osd芯片的i2C通讯和访」· C语言 代码 · 共 54 行

#pragma REGISTERBANK(0)

#include <reg52.h>
#include <intrins.h>

//#include "mtv130.h"

#define MTV130_ADDR	0x3d
#define	READ_ADDR	((MTV130_ADDR << 1) | 1)
#define	WRITE_ADDR	(MTV130_ADDR << 1)

extern bit i2c_xfer(unsigned char addr, unsigned char data *buf, unsigned char count);

bit mtv130_put(unsigned char row, unsigned char col, unsigned char dat)
{
	unsigned char buf[3];

	buf[0] = row;
	buf[1] = col;
	buf[2] = dat;
	return i2c_xfer(WRITE_ADDR, buf, 3);
}

#ifdef MTV130

bit mtv130_putd(unsigned char row, unsigned char col, unsigned short dat)
{
	row |= 0x80;
	col &= ~0x20;
	if (dat & 0x100)
		col |= 0x20;
	return mtv130_put(row, col, (unsigned char)dat);
}

#else

bit mtv130_putd(unsigned char row, unsigned char col, unsigned char dat)
{
	row |= 0x80;
	return mtv130_put(row, col, dat);
}

#endif

bit mtv130_puta(unsigned char row, unsigned char col, unsigned char attr)
{
	row |= 0xa0;
	return mtv130_put(row, col, attr);
}

void mtv130_init(void)
{
}