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資源簡介

linux下操作串口使用modbus-rtu協議讀取數據,使用SPI接口操作LCD12864液晶。

資源截圖

代碼片段和文件信息

/*
?============================================================================
?Name????????:?main.c
?Author??????:?cp1300
?Version?????:
?Copyright???:?Your?copyright?notice
?Description?:?Hello?World?in?C?Ansi-style
?============================================================================
?*/


#include?
#include?
#include?
#include?
#include?
#include?“modbus_rtu.h“
#include?“SystemLog.h“
#include?“UserThread.h“
#include?“spi.h“
#include?“gpio.h“
#include?“nano_pi_spi.h“
#include?
#include?“JLX12864G.h“
#include?“LCD12864.h“

#define?TEMP_PATH?“/sys/class/thermal/thermal_zone0/temp“
#define?MAX_SIZE?32

#define?LCD_RST_PIN_INDEX 12?//pin
#define?LCD_RS_PIN_INDEX 7??//pin



SPI_HANDLE?SPI_Handle;
JLX12864G_HANDLE?mJLX12864G_Handle;
LCD12864_HANDLE?g_LCD12864_Handle;

//寫1字節數據接口
void?JLX12864G_WriteData(u8?*datau8?len)
{
//寫多個字節的數據到SPI設?備
writeBytesToSPI(SPI_Handle.fd?data?len?0?500?8);
}


//設置RS電平
void?JLX12864G_SetRS(u8?level)
{
if(level)?//高電平
{
setGPIOValue(LCD_RS_PIN_INDEX?GPIO_HIGH);???????????//對某個引腳輸出高電平
}
else
{
setGPIOValue(LCD_RS_PIN_INDEX?GPIO_LOW);???????????//對某個引腳輸出低電平
}
}


//設置RST電平
void?JLX12864G_SetRST(u8?level)
{
if(level)?//高電平
{
setGPIOValue(LCD_RST_PIN_INDEX?GPIO_HIGH);???????????//對某個引腳輸出高電平
}
else
{
setGPIOValue(LCD_RST_PIN_INDEX?GPIO_LOW);???????????//對某個引腳輸出低電平
}
}

//系統毫秒延時
void?JLX12864G_DelayMS(u8?ms)
{
usleep(1000*ms);
}


//獲取CPU溫度
float?GetCPU_Temp(void)
{
float?ftemp;
int?fd;
char?buf[MAX_SIZE];

//?打開/sys/class/thermal/thermal_zone0/temp
fd?=?open(TEMP_PATH?O_RDONLY);
if?(fd? fprintf(stderr?“failed?to?open?thermal_zone0/temp\n“);
return?-1;
}

//?讀取內容
if?(read(fd?buf?MAX_SIZE)? fprintf(stderr?“failed?to?read?temp\n“);
return?-1;
}

//?轉換為浮點數打印
ftemp?=?atoi(buf);//?/?1000.0;
//printf(“temp:?%.2f\n“?temp);

//?關閉文件
close(fd);
}



//測試線程
void?*func(void?*arg)
{

float?ftemp?=?0;
char?buff[64];

SPI_Init(&SPI_Handle?“/dev/spidev0.0“); //打開SPI驅動
setSPIReadBitsPerWord(SPI_Handle.fd?8); //8bit模式
setSPIBitOrder(SPI_Handle.fd?MSBFIRST); //高位在前
//setSPIMaxSpeed(SPI_Handle.fd?500); //設備SPI傳輸速度?10K
setSPIDataMode(SPI_Handle.fd?SPI_MODE0); //模式0

if(initPinGPIO(BOARD_NANOPI_M1)? {
printf(“error:gpio?init?error!\r\n“);
}
exportGPIOPin(LCD_RST_PIN_INDEX); //導出IO文件?RST接口
setGPIODirection(LCD_RST_PIN_INDEX??GPIO_OUT); //輸出

exportGPIOPin(LCD_RS_PIN_INDEX); //導出IO文件?RS接口
setGPIODirection(LCD_RS_PIN_INDEX??GPIO_OUT); //輸出

//初始化JLX12864G硬件
JLX12864G_Init(&mJLX12864G_Handle?JLX12864G_WriteData?JLX12864G_SetRS?JLX12864G_SetRST?JLX12864G_DelayMS?40);
LCD12864_GRAM_Init(&g_LCD12864_Handle); //初始化虛擬LCD12864屏幕

while(1)
{
ftemp?=?GetCPU_Temp(); //獲取CPU溫度
sprintf(buff“CPU?TEMP:%.02f“ftemp); //格式化字符串
LCD12864_GRAM_ShowString(&g_LCD12864_Handle?0?0?buff?FONT16_COVER); //覆蓋顯示-將字符串在虛擬LCD12864中顯示
JLX12864

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????14916??2018-08-12?15:28??linux_app\.cproject

?????文件????????787??2018-08-02?20:41??linux_app\.project

?????文件??????73298??2018-08-12?15:35??linux_app\Debug\linux_app

?????文件???????1305??2018-08-12?15:35??linux_app\Debug\makefile

?????文件????????239??2018-08-12?15:35??linux_app\Debug\objects.mk

?????文件????????579??2018-08-12?15:35??linux_app\Debug\sources.mk

?????文件????????191??2018-08-12?10:17??linux_app\Debug\src\Hardware\A20\A20_SPI.d

?????文件????????195??2018-08-12?10:22??linux_app\Debug\src\Hardware\A20\common.d

?????文件???????1116??2018-08-12?10:22??linux_app\Debug\src\Hardware\A20\subdir.mk

?????文件????????123??2018-08-12?15:30??linux_app\Debug\src\Hardware\ASCII_8x16.d

?????文件???????5064??2018-08-12?15:30??linux_app\Debug\src\Hardware\ASCII_8x16.o

?????文件????????289??2018-08-12?15:30??linux_app\Debug\src\Hardware\JLX12864G.d

?????文件???????7380??2018-08-12?15:30??linux_app\Debug\src\Hardware\JLX12864G.o

?????文件????????323??2018-08-12?15:30??linux_app\Debug\src\Hardware\NANO_PI\common.d

?????文件??????11576??2018-08-12?15:30??linux_app\Debug\src\Hardware\NANO_PI\common.o

?????文件????????287??2018-08-12?15:30??linux_app\Debug\src\Hardware\NANO_PI\gpio.d

?????文件???????8444??2018-08-12?15:30??linux_app\Debug\src\Hardware\NANO_PI\gpio.o

?????文件????????485??2018-08-12?15:30??linux_app\Debug\src\Hardware\NANO_PI\NANO_PI_SPI.d

?????文件???????8332??2018-08-12?15:30??linux_app\Debug\src\Hardware\NANO_PI\NANO_PI_SPI.o

?????文件???????1358??2018-08-12?15:35??linux_app\Debug\src\Hardware\NANO_PI\subdir.mk

?????文件????????199??2018-08-12?15:30??linux_app\Debug\src\Hardware\SPI.d

?????文件???????3536??2018-08-12?15:30??linux_app\Debug\src\Hardware\SPI.o

?????文件???????1346??2018-08-12?15:35??linux_app\Debug\src\Hardware\subdir.mk

?????文件????????203??2018-08-12?15:30??linux_app\Debug\src\Hardware\Uart.d

?????文件???????7864??2018-08-12?15:30??linux_app\Debug\src\Hardware\Uart.o

?????文件???????1595??2018-08-12?15:35??linux_app\Debug\src\main.d

?????文件???????9584??2018-08-12?15:35??linux_app\Debug\src\main.o

?????文件????????351??2018-08-12?15:30??linux_app\Debug\src\Program\LCD\LCD12864.d

?????文件???????8320??2018-08-12?15:30??linux_app\Debug\src\Program\LCD\LCD12864.o

?????文件???????1124??2018-08-12?15:35??linux_app\Debug\src\Program\LCD\subdir.mk

............此處省略64個文件信息

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