目前是可以正确读取设备ID 也就是写入读取功能是没问题的。在主程序中AD7190_Data显示为0.
以下是主程序以及spi驱动
MAIN：
#include "main.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "ad7190.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
uint32_t READ_Data = 0 ;
uint8_t READ_State = 0;
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
uint32_t AD7190_Data = 0;
float AD7190_Val;
int main(void)
{
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART3_UART_Init();
/* USER CODE BEGIN 2 */
v_AD7190_Statrt();
u_AD7190_Get_ID(0x84);//检查ID，，AD7195要该成0Xa6
read_reg();
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
// GetDifferentialData();
/* write_buf = 0x60;
AD7192ReadWrite(&write_buf,NULL,1);
write_buf = 0x00;
AD7192ReadWrite(&write_buf,&AD7190_ID,1);*/
// LED_TEST();
// v_AD7190_Get_Data();//读数据
while(AD7190_DOUT){};//
AD7190Write(0x58);
AD7190_Data = v_AD7190_Read3Byte();
v_AD7190_Cal(AD7190_Data,&AD7190_Val);
// AD7190Write(0x5c);
// READ_Data = AD7190Read();
// READ_State = AD7190Read_Byte();
HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_0);
HAL_Delay(200);
AD7190.c:
#include "ad7190.h"
uint8_t AD7190_ID;
uint8_t conf_reg[3];
uint8_t mode_reg[3];
uint32_t Data;
void Delay(uint32_t nCount)
{
for(; nCount != 0; nCount--);
}
void LED_TEST(void)//AD7190��ͨ��IO P2�����ӵ�LED������LED��˸
{
AD7190_CS_L;
AD7190Write(0x28);//
AD7190Write(0x24);//
AD7190_CS_H;
Delay(1000000);//Լ0.5S��ʱ
AD7190_CS_L;
AD7190Write(0x28);//
AD7190Write(0x20);//
AD7190_CS_H;
Delay(1000000);
}
void read_reg(void)//��ȡ���üĴ�����ģʽ�Ĵ���������������֤���������Ƿ���ȷд��
{
//��ȡ3Byte���üĴ�������
Delay(100);
AD7190_CS_L;
AD7190Write(0x50);//write communication register 0x50 to control the progress to read configuration register
AD7190_CS_H;
Delay(100);
AD7190_CS_L;
conf_reg[0]=AD7190Read_Byte();
conf_reg[1]=AD7190Read_Byte();
conf_reg[2]=AD7190Read_Byte();
AD7190_CS_H;
//��ȡ3Byteģʽ�Ĵ�������
Delay(100);
AD7190_CS_L;
AD7190Write(0x48);//write communication register 0x50 to control the progress to read configuration register
AD7190_CS_H;
Delay(100);
AD7190_CS_L;
mode_reg[0]=AD7190Read_Byte();
mode_reg[1]=AD7190Read_Byte();
mode_reg[2]=AD7190Read_Byte();
AD7190_CS_H;
}
void AD7190Write(uint8_t Data)
{
uint8_t data;
data=Data;
for(uint8_t i=0;i<8;i++)
{
AD7190_SCLK_L;
if(data&0x80)
AD7190_DIN_H;
else
AD7190_DIN_L;
Delay(100);
AD7190_SCLK_H;
Delay(100);
data<<=1;
}
}
uint32_t AD7190Read(void)
{
uint32_t DATA;
DATA=0;
for(uint8_t i=0;i<24;i++)
{
DATA<<=1;
AD7190_SCLK_L;
Delay(100);
if(AD7190_DOUT)
DATA++;
AD7190_SCLK_H;
Delay(100);
}
Delay(100);
return DATA;
}
uint8_t AD7190Read_Byte(void)
{
uint8_t DATA;
DATA=0;
for(uint8_t i=0;i<8;i++)
{
DATA<<=1;
AD7190_SCLK_L;
Delay(100);
if(AD7190_DOUT)
DATA++;
AD7190_SCLK_H;
Delay(100);
}
Delay(100);
return DATA;
}
void AD7190_Reset(void)
{
AD7190_CS_L;
AD7190_DIN_H;
for(uint8_t a=0;a<50;a++)//�ṩ����40��д��������λAD7190
{
AD7190_SCLK_L;
Delay(100);
AD7190_SCLK_H;
Delay(100);
}
AD7190_CS_H;
}
void AD7190_INIT(void)
{
Delay(100);
AD7190_CS_L;
AD7190Write(0x60);
AD7190_ID=AD7190Read_Byte();//��ȡAD7190 ID = 0xX4
AD7190_CS_H;
Delay(100);
AD7190_CS_L;
AD7190Write(0x10);//配置寄存器
AD7190Write(0x00);//CON23-CON16
AD7190Write(0x02);//CON15-CON8 通道选择
AD7190Write(0x00);//CON7-CON0 0x00:GAIN=1;增益设置
//0x03:GAIN=8;
//0x04:GAIN=16;
//0x07:GAIN=128; (GAIN=128ʱ�����뷶ΧΪ+-39.06mV)
AD7190_CS_H;
Delay(100);
AD7190_CS_L;
AD7190Write(0x08);//模式寄存器
AD7190Write(0x08);//MR23-MR16
AD7190Write(0x00);//MR15-MR8
AD7190Write(0x3f);//MR7-MR0 fs(MR0-MR9) = 0x00ff = 255,�������������Ϊ4920/255=19.2sps
//0x00 0xff��19.2sps
//0x00 0x3f��78sps
//0x00 0x1f��164sps
//0x00 0x0f��328sps
//0x00 0x05��984sps
AD7190_CS_H;
}
void v_AD7190_Statrt(void)
{
AD7190_Reset();//��λAD7190���ֽӿ�
AD7190_INIT();
Delay(100);
AD7190_CS_L;
AD7190Write(0x28);//GPOCONGPIO配置寄存器
AD7190Write(0x24);//P2为高，P3为低
AD7190_CS_H;
Delay(100);
AD7190_CS_L;
}
void v_AD7190_Get_Data(void)
{
while(AD7190_DOUT){};//
AD7190Write(0x58);
Data=AD7190Read();//Data
}
void u_AD7190_Get_ID(uint8_t id)
{
while(1)
{
Delay(100);
AD7190_CS_L;
AD7190Write(0x60);
AD7190_ID=AD7190Read_Byte();//��ȡAD7190 ID = 0xX4
AD7190_CS_H;
Delay(100);
if(AD7190_ID == id)
{
HAL_GPIO_WritePin(GPIOB, LD3_Pin, GPIO_PIN_SET);
break;
}
}
}
uint32_t v_AD7190_Read3Byte(void)
{
uint32_t Temp=0;
uint8_t Buf[3];
Buf[0] = AD7190Read_Byte();
Buf[1] = AD7190Read_Byte();
Buf[2] = AD7190Read_Byte();
return Temp = ((uint32_t)Buf[0]<<16) | ((uint32_t)Buf[1]<<8) | Buf[2];
}
void v_AD7190_Cal(uint32_t AD_Reg,float *Data)
{
*Data = ((float)AD_Reg/8388608 - 1)*AD7190_VREF/AD7190_GAIN;
}
还请工程师们解答。