使用RT-Thread studio开启SPI框架驱动OLED

Soleil · 发表于 2021-9-8 09:43:17

想学习使用SPI框架驱动OLED，就准备把中景园的程序移植到RTT上，参考了网上的步骤，在settings里开启spi，在board.c里复制HAL_SPI_MspInit，在board.h和stm32xxxx_hal_config.h里开启了spi，然后代码如下：

#include "OLED.h"
#define RES_PIN 11
#define DC_PIN 12
#define CS_PIN 15
uint8_t OLED_GRAM[128][8];
static struct rt_spi_device* spi_dev_ssd1306; /* SPI设备ssd1306对象 */
int oled_spi_device_init()
{
__HAL_RCC_GPIOA_CLK_ENABLE();
//设备挂载到SPI总线，抽象为 spi10 设备，同时使用时还需进行 rt_spi_configure
rt_hw_spi_device_attach("spi1", "spi10", GPIOA, GPIO_PIN_15);
return RT_EOK;
}
INIT_DEVICE_EXPORT(oled_spi_device_init);//自动初始化
int my_oled_init(void)
{
rt_pin_mode(RES_PIN, PIN_MODE_OUTPUT );
rt_pin_mode(DC_PIN, PIN_MODE_OUTPUT );
rt_pin_mode(CS_PIN, PIN_MODE_OUTPUT );
spi_dev_ssd1306 = (struct rt_spi_device *)rt_device_find("spi10");
if (!spi_dev_ssd1306)
{
rt_kprintf("spi sample run failed! can't find %s device!\n", "spi10");
}
else
{
// owner必须配置,因为默认为空,为空时无法进行初始化操作
spi_dev_ssd1306->bus->owner = spi_dev_ssd1306; // 必须!!!
// 配置spi
struct rt_spi_configuration cfg;
cfg.data_width = 8;
cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_0 | RT_SPI_MSB; // 主机,模式0,高位在前
cfg.max_hz = 20 * 1000 * 1000; // SPI 接口时钟频率
rt_spi_configure(spi_dev_ssd1306, &cfg); // 此时才进行MspInit相关的时钟及IO口初始化
}
OLED_Init();
return RT_EOK;
}
//OLED写一个字节
void OLED_WR_Byte(uint8_t dat, uint8_t cmd)
{
if(cmd)
{
OLED_DC_Set();
}else{
OLED_DC_Clr();
}
rt_spi_send(spi_dev_ssd1306, &dat, 1);
OLED_DC_Set();
}
//开启OLED显示
void OLED_DisPlay_On(void)
{
OLED_WR_Byte(0x8D,OLED_CMD);//电荷泵使能
OLED_WR_Byte(0x14,OLED_CMD);//开启电荷泵
OLED_WR_Byte(0xAF,OLED_CMD);//点亮屏幕
}
//关闭OLED显示
void OLED_DisPlay_Off(void)
{
OLED_WR_Byte(0x8D,OLED_CMD);//电荷泵使能
OLED_WR_Byte(0x10,OLED_CMD);//关闭电荷泵
OLED_WR_Byte(0xAF,OLED_CMD);//关闭屏幕
}
//更新显存到OLED
void OLED_Refresh(void)
{
uint8_t i,n;
for(i=0;i<8;i++)
{
OLED_WR_Byte(0xb0+i,OLED_CMD); //设置行起始地址
OLED_WR_Byte(0x00,OLED_CMD); //设置低列起始地址
OLED_WR_Byte(0x10,OLED_CMD); //设置高列起始地址
for(n=0;n<128;n++)
OLED_WR_Byte(OLED_GRAM[n][i],OLED_DATA);
}
}
//清屏函数
void OLED_Clear(void)
{
uint8_t i,n;
for(i=0;i<8;i++)
{
for(n=0;n<128;n++)
{
OLED_GRAM[n][i]=0;//清除所有数据
}
}
OLED_Refresh();//更新显示
}
//画点
//x:0~127
//y:0~63
void OLED_DrawPoint(uint8_t x,uint8_t y)
{
uint8_t i,m,n;
i=y/8;
m=y%8;
n=1<<m;
OLED_GRAM[x][i]|=n;
}
//清除一个点
//x:0~127
//y:0~63
void OLED_ClearPoint(uint8_t x,uint8_t y)
{
uint8_t i,m,n;
i=y/8;
m=y%8;
n=1<<m;
OLED_GRAM[x][i]=~OLED_GRAM[x][i];
OLED_GRAM[x][i]|=n;
OLED_GRAM[x][i]=~OLED_GRAM[x][i];
}
//OLED的初始化
void OLED_Init(void)
{
OLED_RES_Clr();
rt_thread_delay(200);
OLED_RES_Set();
OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
OLED_WR_Byte(0x40,OLED_CMD);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)
OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
OLED_WR_Byte(0xCF,OLED_CMD);// Set SEG Output Current Brightness
OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
OLED_WR_Byte(0x00,OLED_CMD);//-not offset
OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
OLED_WR_Byte(0x12,OLED_CMD);
OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
OLED_WR_Byte(0x02,OLED_CMD);//
OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
OLED_WR_Byte(0xAF,OLED_CMD);
OLED_Clear();
OLED_DrawPoint(1, 2);
OLED_Refresh();
}