STM32上FDC2214的驱动
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简介：
本简介提供关于如何在STM32微控制器上开发和实现FDC2214生物传感器驱动程序的技术指导与代码示例。适合硬件工程师学习参考。
```c
#define _FDC2X14_C
#include sys.h
#include FDC2X14.h
#include myiic.h
#include delay.h
#include usart.h
#define FDC2X14_Address 0x2A
#define FDC2X14_W (FDC2X14_Address<<1)
#define FDC2X14_R ((FDC2X14_Address<<1)+1)
#define DATA_CH0 0x00
#define DATA_LSB_CH0 0x01
#define DATA_CH1 0x02
#define DATA_LSB_CH1 0x03
#define DATA_CH2 0x04
#define DATA_LSB_CH2 0x05
#define DATA_CH3 0x06
#define DATA_LSB_CH3 0x07
#define RCOUNT_CH0 0x08
#define RCOUNT_CH1 0x09
#define RCOUNT_CH2 0x0A
#define RCOUNT_CH3 0x0B
#define OFFSET_CH0 0x0C
#define OFFSET_CH1 0x0D
#define OFFSET_CH2 0x0E
#define OFFSET_CH3 0x0F
#define SETTLECOUNT_CH0 0x10
#define SETTLECOUNT_CH1 0x11
#define SETTLECOUNT_CH2 0x12
#define SETTLECOUNT_CH3 0x13
#define CLOCK_DIVIDERS_C_CH0 0x14
#define CLOCK_DIVIDERS_C_CH1 0x15
#define CLOCK_DIVIDERS_C_CH2 0x16
#define CLOCK_DIVIDERS_C_CH3 0x17
#define STATUS 0x18
#define ERROR_CONFIG 0x19
#define CONFIG 0x1A
#define MUX_CONFIG 0x1B
#define RESET_DEV 0x1C
#define DRIVE_CURRENT_CH0 0x1E
#define DRIVE_CURRENT_CH1 0x1F
#define DRIVE_CURRENT_CH2 0x20
#define DRIVE_CURRENT_CH3 0x21
#define MANUFACTURER_ID 0x7E
#define DEVICE_ID 0x7F
u32 Init_FDC[4];
u32 Data_FDC[4];
void FDC2X14_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// Configure PB9 as output low for FDC2X14 reset
GPIO_ResetBits(GPIOB,GPIO_Pin_9);
IIC_Init(); // Initialize IIC
SetFDC2X14(RCOUNT_CH0,0x30,0xCB);
SetFDC2X14(RCOUNT_CH1,0x30,0xCB);
SetFDC2X14(RCOUNT_CH2,0x30,0xCB);
SetFDC2X14(RCOUNT_CH3,0x30,0xCB);
// Configure clock dividers and other settings
...
Init_FDC[0]=FDC2X14ReadCH(0);
Init_FDC[1]=FDC2X14ReadCH(1);
Init_FDC[2]=FDC2X14ReadCH(2);
Init_FDC[3]=FDC2X14ReadCH(3);
}
int FDC2X14ReadCH(u8 index)
{
int result;
switch(index)
{
case 0x00: result = ReadFDC2X14(DATA_CH0,DATA_LSB_CH0); break;
case 0x01: result = ReadFDC2X14(DATA_CH1,DATA_LSB_CH1); break;
...
}
return result;
}
void SetFDC2X14(u8 Address,u8 MSB,u8 LSB)
{
IIC_Start();
IIC_Send_Byte(FDC2X14_W);
IIC_Wait_Ack();
// Send address and data
...
ADS_delay();
IIC_Stop();
}
unsigned int ReadFDC2X14(u8 firstAddress,u8 secondAddress)
{
unsigned int temp;
u8 result[4];
...
return(temp);
}
float Cap_Calculate(u8 index)
{
float Cap,cap_init;
Data_FDC[index]= FDC2X14
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