ex ratio(1 to 64)
ssd1306_write_byte(0x3f, SSD1306_CMD);//--1/64 duty
ssd1306_write_byte(0xD3, SSD1306_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
ssd1306_write_byte(0x00, SSD1306_CMD);//-not offset
ssd1306_write_byte(0xd5, SSD1306_CMD);//--set display clock divide ratio/oscillator frequency
ssd1306_write_byte(0x80, SSD1306_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
ssd1306_write_byte(0xD9, SSD1306_CMD);//--set pre-charge period
ssd1306_write_byte(0xF1, SSD1306_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
ssd1306_write_byte(0xDA, SSD1306_CMD);//--set com pins hardware configuration
ssd1306_write_byte(0x12, SSD1306_CMD);
ssd1306_write_byte(0xDB, SSD1306_CMD);//--set vcomh
ssd1306_write_byte(0x40, SSD1306_CMD);//Set VCOM Deselect Level
ssd1306_write_byte(0x20, SSD1306_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
ssd1306_write_byte(0x02, SSD1306_CMD);//
ssd1306_write_byte(0x8D, SSD1306_CMD);//--set Charge Pump enable/disable
ssd1306_write_byte(0x14, SSD1306_CMD);//--set(0x10) disable
ssd1306_write_byte(0xA4, SSD1306_CMD);// Disable Entire Display On (0xa4/0xa5)
ssd1306_write_byte(0xA6, SSD1306_CMD);// Disable Inverse Display On (0xa6/a7)
ssd1306_write_byte(0xAF, SSD1306_CMD);//--turn on oled panel
ssd1306_display_on();
ssd1306_clear_screen(0xff);
}
static int __devinit spi_ssd1306_probe(struct spi_device *spi)
{
printk("spi_ssd1306_probe\n");
spi_ssd1306_dev = spi;
spi_ssd1306_dev->bits_per_word = 9;
ssd1306_init();
ssd1306_clear_screen(0x00);
ssd1306_display_off();
ssd1306_display_string(18, 0, "hello, Linux!", 16, 1);
ssd1306_display_string(0, 16, "this is a spi driver demo!", 16, 1);
ssd1306_refresh_gram();
ssd1306_display_on();
return 0;
}
static int __devexit spi_ssd1306_remove(struct spi_device *spi)
{
printk("ssd1306_remove\n");
ssd1306_clear_screen(0x00);
ssd1306_display_off();
return 0;
}
static struct spi_driver spi_ssd1306_driver = {
.driver = {
.name = "spi_ssd1306",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = spi_ssd1306_probe,
.remove = __devexit_p(spi_ssd1306_remove),
};
static int spi_ssd1306_init(void)
{
return spi_register_driver(&spi_ssd1306_driver);
}
static void spi_ssd1306_exit(void)
{
spi_unregister_driver(&spi_ssd1306_driver);
}
module_init(spi_ssd1306_init);
module_exit(spi_ssd1306_exit);
MODULE_LICENSE("GPL");
makefile
KERN_DIR = /work/system/linux-2.6.22.6
all:
make -C $(KERN_DIR) M=`pwd` modules
clean:
make -C $(KERN_DIR) M=`pwd` modules clean
rm -rf modules.order
obj-m += spi_platform_dev.o
obj-m += spi_s3c24xx_gpio.o
obj-m += spi_bitbang.o
obj-m += spi_ssd1306_drv.o
实验现象：
