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【HC32F448测评】SPI学习与SPI软/硬件驱动OLED
[复制链接]
- 模拟SPI驱动OLED：
宏定义：
#define CS2_PORT (GPIO_PORT_D)
#define CS2_PIN (GPIO_PIN_00)
#define DC2_PORT GPIO_PORT_D
#define DC2_PIN GPIO_PIN_01
#define RST2_PORT GPIO_PORT_D
#define RST2_PIN GPIO_PIN_02
/* MOSI */
#define SDIN_PORT (GPIO_PORT_D)
#define SDIN_PIN (GPIO_PIN_08)
/*SCK*/
#define SCK2_PORT (GPIO_PORT_D)
#define SCK2_PIN (GPIO_PIN_09)
#define OLED_RST_Clr() GPIO_ResetPins(RST2_PORT, RST2_PIN)//RES
#define OLED_RST_Set() GPIO_SetPins(RST2_PORT, RST2_PIN)
#define OLED_DC_Clr() GPIO_ResetPins(DC2_PORT, DC2_PIN)//DC
#define OLED_DC_Set() GPIO_SetPins(DC2_PORT, DC2_PIN)
#define OLED_CS_Clr() GPIO_ResetPins(CS2_PORT, CS2_PIN)//CS
#define OLED_CS_Set() GPIO_SetPins(CS2_PORT, CS2_PIN)
#define OLED_SCLK_Clr() GPIO_ResetPins(SCK2_PORT, SCK2_PIN)//CS
#define OLED_SCLK_Set() GPIO_SetPins(SCK2_PORT, SCK2_PIN)
#define OLED_SDIN_Clr() GPIO_ResetPins(SDIN_PORT, SDIN_PIN)//CS
#define OLED_SDIN_Set() GPIO_SetPins(SDIN_PORT, SDIN_PIN)
OLED.c中初始化GPIO口的函数，初始化模拟SPI，只需要把PIN口设置为输出即可。另外还有一个写入字节的函数，拉低DC输入cmd，拉高DC输入data。
-
//初始化SSD1306
void OLED_Init(void)
{
stc_gpio_init_t stcGpioInit;
(void)GPIO_StructInit(&stcGpioInit);
stcGpioInit.u16PinDir = PIN_DIR_OUT;
(void)GPIO_Init(RST2_PORT, RST2_PIN , &stcGpioInit);
(void)GPIO_Init(DC2_PORT, DC2_PIN , &stcGpioInit);
(void)GPIO_Init(CS2_PORT, CS2_PIN, &stcGpioInit);
(void)GPIO_Init(SCK2_PORT, SCK2_PIN, &stcGpioInit);
(void)GPIO_Init(SDIN_PORT , SDIN_PIN, &stcGpioInit);
OLED_RST_Set();
DDL_DelayMS(100);
OLED_RST_Clr();
DDL_DelayMS(200);
OLED_RST_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);//--turn on oled panel
OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/
OLED_Clear();
OLED_Set_Pos(0,0);
}
//向SSD1306写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(u8 dat,u8 cmd)
{
u8 i;
if(cmd)
OLED_DC_Set();
else
OLED_DC_Clr();
OLED_CS_Clr();
for(i=0;i<8;i++)
{
OLED_SCLK_Clr();
if(dat&0x80)
OLED_SDIN_Set();
else
OLED_SDIN_Clr();
OLED_SCLK_Set();
dat<<=1;
}
OLED_CS_Set();
OLED_DC_Set();
}
oled其余函数，如果需要oledfont去我关于I2C的帖子里的zip包下载。
void OLED_Set_Pos(unsigned char x, unsigned char y)
{
OLED_WR_Byte(0xb0+y,OLED_CMD);
OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
OLED_WR_Byte((x&0x0f)|0x01,OLED_CMD);
}
//开启OLED显示
void OLED_Display_On(void)
{
OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
OLED_WR_Byte(0X14,OLED_CMD); //DCDC ON
OLED_WR_Byte(0XAF,OLED_CMD); //DISPLAY ON
}
//关闭OLED显示
void OLED_Display_Off(void)
{
OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
OLED_WR_Byte(0X10,OLED_CMD); //DCDC OFF
OLED_WR_Byte(0XAE,OLED_CMD); //DISPLAY OFF
}
//清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!
void OLED_Clear(void)
{
u8 i,n;
for(i=0;i<8;i++)
{
OLED_WR_Byte (0xb0+i,OLED_CMD); //设置页地址（0~7）
OLED_WR_Byte (0x00,OLED_CMD); //设置显示位置—列低地址
OLED_WR_Byte (0x10,OLED_CMD); //设置显示位置—列高地址
for(n=0;n<128;n++)OLED_WR_Byte(0,OLED_DATA);
} //更新显示
}
//在指定位置显示一个字符,包括部分字符
//x:0~127
//y:0~63
//mode:0,反白显示;1,正常显示
//size:选择字体 16/12
void OLED_ShowChar(u8 x,u8 y,u8 chr)
{
unsigned char c=0,i=0;
c=chr-' ';//得到偏移后的值
if(x>Max_Column-1){x=0;y=y+2;}
if(SIZE ==16)
{
OLED_Set_Pos(x,y);
for(i=0;i<8;i++)
OLED_WR_Byte(F8X16[c*16+i],OLED_DATA);
OLED_Set_Pos(x,y+1);
for(i=0;i<8;i++)
OLED_WR_Byte(F8X16[c*16+i+8],OLED_DATA);
}
else {
OLED_Set_Pos(x,y+1);
for(i=0;i<6;i++)
OLED_WR_Byte(F6x8[c][i],OLED_DATA);
}
}
////m^n函数
//u32 oled_pow(u8 m,u8 n)
//{
// u32 result=1;
// while(n--)result*=m;
// return result;
//}
//显示2个数字
//x,y :起点坐标
//len :数字的位数
//size:字体大小
//mode:模式 0,填充模式;1,叠加模式
//num:数值(0~4294967295);
void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size)
{
u8 t,temp;
u8 enshow=0;
for(t=0;t<len;t++)
{
temp=(num/oled_pow(10,len-t-1))%10;
if(enshow==0&&t<(len-1))
{
if(temp==0)
{
OLED_ShowChar(x+(size/2)*t,y,' ');
continue;
}else enshow=1;
}
OLED_ShowChar(x+(size/2)*t,y,temp+'0');
}
}
//显示一个字符号串
void OLED_ShowString(u8 x,u8 y,u8 *chr)
{
unsigned char j=0;
while (chr[j]!='\0')
{ OLED_ShowChar(x,y,chr[j]);
x+=8;
if(x>120){x=0;y+=2;}
j++;
}
}
//显示汉字
void OLED_ShowCHinese(u8 x,u8 y,u8 no)
{
u8 t,adder=0;
OLED_Set_Pos(x,y);
for(t=0;t<16;t++)
{
OLED_WR_Byte(Hzk[2*no][t],OLED_DATA);
adder+=1;
}
OLED_Set_Pos(x,y+1);
for(t=0;t<16;t++)
{
OLED_WR_Byte(Hzk[2*no+1][t],OLED_DATA);
adder+=1;
}
}
/***********功能描述：显示显示BMP图片128×64起始点坐标(x,y),x的范围0～127，y为页的范围0～7*****************/
void OLED_DrawBMP(unsigned char x0, unsigned char y0,unsigned char x1, unsigned char y1,unsigned char BMP[])
{
unsigned int j=0;
unsigned char x,y;
if(y1%8==0) y=y1/8;
else y=y1/8+1;
for(y=y0;y<y1;y++)
{
OLED_Set_Pos(x0,y);
for(x=x0;x<x1;x++)
{
OLED_WR_Byte(BMP[j++],OLED_DATA);
}
}
}
2.硬件SPI
-
配置SPI
int32_t spiconfig(CM_SPI_TypeDef *SPIx)
{
int32_t i32Ret;
stc_spi_init_t stcspiinit;
stc_spi_delay_t stcSpiDelayCfg;
/* Peripheral clock enable */
FCG_Fcg1PeriphClockCmd(SPI_CLK, ENABLE);
(void)SPI_StructInit(&stcspiinit);
(void)SPI_DelayStructInit(&stcSpiDelayCfg);
(void)SPI_DeInit(SPI_UNIT);
stcspiinit.u32WireMode = SPI_3_WIRE;
stcspiinit.u32TransMode = SPI_FULL_DUPLEX;
stcspiinit.u32MasterSlave = SPI_MASTER;
stcspiinit.u32ModeFaultDetect = SPI_MD_FAULT_DETECT_DISABLE;
stcspiinit.u32Parity = SPI_PARITY_INVD;
stcspiinit.u32SpiMode = SPI_MD_1;
stcspiinit.u32BaudRatePrescaler = SPI_BR_CLK_DIV16;
stcspiinit.u32DataBits = SPI_DATA_SIZE_8BIT;
stcspiinit.u32FirstBit = SPI_FIRST_MSB;
stcspiinit.u32FrameLevel = SPI_1_FRAME;
i32Ret=SPI_Init(SPI_UNIT, &stcspiinit);
// SPI_SSPinSelect(SPI_UNIT,SPI_PIN_SS0);
// SPI_SetCommMode(SPI_UNIT,SPI_COMM_MD_NORMAL);
// stcSpiDelayCfg.u32IntervalDelay = SPI_INTERVAL_TIME_4SCK;
// stcSpiDelayCfg.u32ReleaseDelay = SPI_RELEASE_TIME_4SCK;
// stcSpiDelayCfg.u32SetupDelay = SPI_SETUP_TIME_1SCK;
// (void)SPI_DelayTimeConfig(SPI_UNIT, &stcSpiDelayCfg);
//
/* Enable SPI */
SPI_Cmd(SPI_UNIT, ENABLE);
SPI_SetSckPhase(SPI_UNIT, SPI_SCK_PHASE_EVEN_EDGE_SAMPLE);
SPI_SetCommMode(SPI_UNIT, SPI_COMM_MD_CONTINUE);
return i32Ret;
}
void SPIInit(void){
stc_gpio_init_t stcGpioInit;
/* Configuration SPI */
(void)GPIO_StructInit(&stcGpioInit);
stcGpioInit.u16PinDrv = PIN_HIGH_DRV;
(void)GPIO_Init(MISO_PORT,MISO_PIN, &stcGpioInit);
stcGpioInit.u16PinInputType = PIN_IN_TYPE_CMOS;
(void)GPIO_Init(SCK2_PORT, SCK2_PIN, &stcGpioInit);
(void)GPIO_Init(SDIN_PORT , SDIN_PIN, &stcGpioInit);
/* Configure Port */
// GPIO_SetFunc(CS_PORT, CS_PIN, CS_FUNC);
GPIO_SetFunc(SCK2_PORT, SCK2_PIN, SCK_FUNC);
GPIO_SetFunc(SDIN_PORT, SDIN_PIN, MOSI_FUNC);
GPIO_SetFunc(MISO_PORT, MISO_PIN, MISO_FUNC);
(void)spiconfig(SPI_UNIT);
}
- 更改oled初始化函数和字节写入函数：
//向SSD1306写入一个字节。
//dat:要写入的数据/命令
//cmd:数据/命令标志 0,表示命令;1,表示数据;
void OLED_WR_Byte(u8 dat,u8 cmd)
{
u8 i;
if(cmd)
OLED_DC_Set();
else
OLED_DC_Clr();
OLED_CS_Clr();
// for(i=0;i<8;i++)
// {
// OLED_SCLK_Clr();
// if(dat&0x80)
// OLED_SDIN_Set();
// else
// OLED_SDIN_Clr();
// OLED_SCLK_Set();
// dat<<=1;
// }
SPI_Trans(SPI_UNIT , &dat, 1, 200);
OLED_CS_Set();
OLED_DC_Set();
}
//初始化SSD1306
void OLED_Init(void)
{
stc_gpio_init_t stcGpioInit;
(void)GPIO_StructInit(&stcGpioInit);
stcGpioInit.u16PinDir = PIN_DIR_OUT;
(void)GPIO_Init(RST2_PORT, RST2_PIN , &stcGpioInit);
(void)GPIO_Init(DC2_PORT, DC2_PIN , &stcGpioInit);
(void)GPIO_Init(CS2_PORT, CS2_PIN, &stcGpioInit);
// (void)GPIO_Init(SCK2_PORT, SCK2_PIN, &stcGpioInit);
// (void)GPIO_Init(SDIN_PORT , SDIN_PIN, &stcGpioInit);
OLED_RST_Set();
DDL_DelayMS(100);
OLED_RST_Clr();
DDL_DelayMS(200);
OLED_RST_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);//--turn on oled panel
OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/
OLED_Clear();
OLED_Set_Pos(0,0);
}
- 效果：
- 问题：上述这个图片是软件模拟得出的，硬件SPI驱动OLED的函数却有问题，第一个就是SPI传输的效率比模拟的还要低，并且OLED没有任何显示，到现在也没有解决问题，问题还在查找中。
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