uint8_t u8g_dev_st7920_128x64_4x_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg) { switch(msg) { case U8G_DEV_MSG_INIT: u8g_InitCom(u8g, dev, U8G_SPI_CLK_CYCLE_400NS); u8g_WriteEscSeqP(u8g, dev, u8g_dev_st7920_128x64_init_seq); break; case U8G_DEV_MSG_STOP: break; case U8G_DEV_MSG_PAGE_NEXT: { uint8_t y, i; uint8_t *ptr; u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem); u8g_SetAddress(u8g, dev, 0); /* cmd mode */ u8g_SetChipSelect(u8g, dev, 1); y = pb->p.page_y0; ptr = pb->buf; for( i = 0; i < 32; i ++ ) { u8g_SetAddress(u8g, dev, 0); /* cmd mode */ u8g_WriteByte(u8g, dev, 0x03e ); /* enable extended mode */ if ( y < 32 ) { u8g_WriteByte(u8g, dev, 0x080 | y ); /* y pos */ u8g_WriteByte(u8g, dev, 0x080 ); /* set x pos to 0*/ } else { u8g_WriteByte(u8g, dev, 0x080 | (y-32) ); /* y pos */ u8g_WriteByte(u8g, dev, 0x080 | 8); /* set x pos to 64*/ } u8g_SetAddress(u8g, dev, 1); /* data mode */ u8g_WriteSequence(u8g, dev, WIDTH/8, ptr); ptr += WIDTH/8; y++; } u8g_SetChipSelect(u8g, dev, 0); } break; } return u8g_dev_pb32h1_base_fn(u8g, dev, msg, arg); }
uint8_t u8g_dev_rrd_st7920_128x64_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg) { uint8_t i, y; switch (msg) { case U8G_DEV_MSG_INIT: { OUT_WRITE(ST7920_CS_PIN, LOW); OUT_WRITE(ST7920_DAT_PIN, LOW); OUT_WRITE(ST7920_CLK_PIN, HIGH); ST7920_CS(); u8g_Delay(120); //initial delay for boot up ST7920_SET_CMD(); ST7920_WRITE_BYTE(0x20); //non-extended mode ST7920_WRITE_BYTE(0x08); //display off, cursor+blink off ST7920_WRITE_BYTE(0x01); //clear DDRAM ram u8g_Delay(15); //delay for DDRAM clear ST7920_WRITE_BYTE(0x24); //extended mode ST7920_WRITE_BYTE(0x26); //extended mode + GDRAM active for (y = 0; y < (LCD_PIXEL_HEIGHT) / 2; y++) { //clear GDRAM ST7920_WRITE_BYTE(0x80 | y); //set y ST7920_WRITE_BYTE(0x80); //set x = 0 ST7920_SET_DAT(); for (i = 0; i < 2 * (LCD_PIXEL_WIDTH) / 8; i++) //2x width clears both segments ST7920_WRITE_BYTE(0); ST7920_SET_CMD(); } ST7920_WRITE_BYTE(0x0C); //display on, cursor+blink off ST7920_NCS(); } break; case U8G_DEV_MSG_STOP: break; case U8G_DEV_MSG_PAGE_NEXT: { uint8_t* ptr; u8g_pb_t* pb = (u8g_pb_t*)(dev->dev_mem); y = pb->p.page_y0; ptr = (uint8_t*)pb->buf; ST7920_CS(); for (i = 0; i < PAGE_HEIGHT; i ++) { ST7920_SET_CMD(); if (y < 32) { ST7920_WRITE_BYTE(0x80 | y); //y ST7920_WRITE_BYTE(0x80); //x=0 } else { ST7920_WRITE_BYTE(0x80 | (y - 32)); //y ST7920_WRITE_BYTE(0x80 | 8); //x=64 } ST7920_SET_DAT(); ST7920_WRITE_BYTES(ptr, (LCD_PIXEL_WIDTH) / 8); //ptr is incremented inside of macro y++; } ST7920_NCS(); } break; } #if PAGE_HEIGHT == 8 return u8g_dev_pb8h1_base_fn(u8g, dev, msg, arg); #elif PAGE_HEIGHT == 16 return u8g_dev_pb16h1_base_fn(u8g, dev, msg, arg); #else return u8g_dev_pb32h1_base_fn(u8g, dev, msg, arg); #endif }