AD7193驅動代碼 C語言

ID:610433 · 發表于 2019-10-9 17:24

AD7193是一款ADI公司的AD芯片，差分帶PGA

具體步驟
1.Init
2.Reset
3.Calibrate(zero&full)校準
4.RangeSetup(1,gain1)單雙極性以及增益選擇
5.ChannelSelect通道選擇
6.SingleConversion獲得AD值
7.ConvertToVolts轉換成電壓
8.ContinuousReadAvg(10)10次采樣求均值
9.ConvertToVolts
10.TemperatureRead獲得溫度AD

這些代碼是MCU通用的，不需修改
需要修改的是SPI函數

單片機源程序如下:

#include "YRDKRL78G13.h" // YRDKRL78G13 definitions.
#include "ST7579.h" // ST7579 definitions.
#include "TIME.h" // TIME definitions.
#include "AD7193.h" // AD7193 definitions.
/******************************************************************************/
/************************ Variables Definitions *******************************/
/******************************************************************************/
unsigned long result = 0;
unsigned long degreesC = 0;
float voltage = 0;
/***************************************************************************//**
* @brief Draws the ADI logo and displays the name of ADI component.
*
* @param componentName - The name of the ADI component.
*
* @return None.
*******************************************************************************/
void ADI_Component(unsigned char* string)
{
const unsigned char adiComponent[7] =
{
0xFE, 0xFE, 0x82, 0xC6, 0xEE, 0xFE, 0xFE
};
ST7579_Image(0, 0, adiComponent, 7, 8);
ST7579_String(0, 9, string, 0);
}
/***************************************************************************//**
* @brief Main function.
*
* @return None.
*******************************************************************************/
void main(void)
{
/* Initialize YRDKRL78G13. */
YRDKRL78G13_Init();
/* Enable interrupts. */
__enable_interrupt();
/* Initialize timer. */
TIME_Init();
/* Initialize the ST7579 Display. */
ST7579_Init();
/* Initialize AD7193 device. */
if(AD7193_Init())
{
ADI_Component("AD7193 OK");
}
else
{
ADI_Component("AD7193 Err");
}
/* Reset the device. */
AD7193_Reset();
/* Allow a period of 500 us before accessing any of the on-chip registers. */
TIME_DelayUs(500);
/* Calibrate channel 0. */
AD7193_Calibrate(AD7193_MODE_CAL_INT_ZERO, AD7193_CH_0);
AD7193_Calibrate(AD7193_MODE_CAL_INT_FULL, AD7193_CH_0);
while(1)
{
/* Select unipolar operation and ADC's input range to +-2.5V. */
AD7193_RangeSetup(1, AD7193_CONF_GAIN_1);
/* Select channel AIN1(+) - AIN2(-). */
AD7193_ChannelSelect(AD7193_CH_0);
/* Perform a single conversion. */
result = AD7193_SingleConversion();
ST7579_String(2, 0, "CHANNEL 0:", 0);
ST7579_String(3, 0, "RAW: ", 0);
ST7579_String(4, 0, "1RD: [V]", 0);
ST7579_HexNumber(3, 30, result, 0);
/* The value of the voltage reference on PmodAD5 is 2.5V by default. */
voltage = AD7193_ConvertToVolts(result, 2.5);
ST7579_FloatNumber(4, 30, voltage, 3, 0);
/* Continuous reads. */
result = AD7193_ContinuousReadAvg(10);
voltage = AD7193_ConvertToVolts(result, 2.5);
ST7579_String(5, 0, "RAW: ", 0);
ST7579_String(6, 0, "AVG: [V]", 0);
ST7579_HexNumber(5, 30, result, 0);
ST7579_FloatNumber(6, 30, voltage, 3, 0);
/* Read the temperature. */
degreesC = AD7193_TemperatureRead();
ST7579_String(7, 0, "TMP: oC", 0);
ST7579_Number(7, 30, degreesC, 0);
}
}