ADS8328 驱动代码

硬件原理图

ads8328.h

#ifndef __ADS8328_H
#define __ADS8328_H     #include <stm32f10x.h>#define ADS8328_SPI_CS_PORT                                                         GPIOA
#define ADS8328_SPI_CS_PIN                                                          GPIO_Pin_4
#define ADS8328_SPI_CS_CLK                                                          RCC_APB2Periph_GPIOA#define ADS8328_SPI_SCK_PORT                            GPIOA
#define ADS8328_SPI_SCK_PIN                             GPIO_Pin_5
#define ADS8328_SPI_SCK_CLK                             RCC_APB2Periph_GPIOA#define ADS8328_SPI_MISO_PORT                           GPIOA
#define ADS8328_SPI_MISO_PIN                            GPIO_Pin_6
#define ADS8328_SPI_MISO_CLK                            RCC_APB2Periph_GPIOA#define ADS8328_SPI_MOSI_PORT                           GPIOA
#define ADS8328_SPI_MOSI_PIN                            GPIO_Pin_7
#define ADS8328_SPI_MOSI_CLK                            RCC_APB2Periph_GPIOA#define ADS8328_SPI_EOC_PORT                                                    GPIOB
#define ADS8328_SPI_EOC_PIN                                                         GPIO_Pin_0
#define ADS8328_SPI_EOC_CLK                                                         RCC_APB2Periph_GPIOA#define ADS8328_SPI_CONVST_PORT                                                 GPIOB
#define ADS8328_SPI_CONVST_PIN                                                  GPIO_Pin_1
#define ADS8328_SPI_CONVST_CLK                                                  RCC_APB2Periph_GPIOA// CS
#define ADS8328_SPI_CS(status)          GPIO_WriteBit(ADS8328_SPI_CS_PORT, ADS8328_SPI_CS_PIN, (BitAction)status)
// CLK
#define ADS8328_SPI_SCK_HIGH                    GPIO_SetBits(ADS8328_SPI_SCK_PORT, ADS8328_SPI_SCK_PIN)
#define ADS8328_SPI_SCK_LOW                         GPIO_ResetBits(ADS8328_SPI_SCK_PORT, ADS8328_SPI_SCK_PIN)
// MOSI
#define ADS8328_SPI_MOSI(status)                GPIO_WriteBit(ADS8328_SPI_MOSI_PORT, ADS8328_SPI_MOSI_PIN, (BitAction)status)
// MISO
#define ADS8328_SPI_MISO_READ                                   GPIO_ReadInputDataBit(ADS8328_SPI_MISO_PORT, ADS8328_SPI_MISO_PIN)
// CONVST
#define ADS8328_SPI_CONVST(status)          GPIO_WriteBit(ADS8328_SPI_CONVST_PORT, ADS8328_SPI_CONVST_PIN, (BitAction)status)
//EOC
#define ADS8328_SPI_EOC                     GPIO_ReadInputDataBit(ADS8328_SPI_EOC_PORT,ADS8328_SPI_EOC_PIN)// ADS8327_REGISTER
// CMR - Command Reg
#define CMD_ADS_SELECT_CH0      0x0000
#define CMD_ADS_SELECT_CH1      0x1000
#define CMD_ADS_WAKEUP          0xB000
#define CMD_ADS_RDCFR           0xC000
#define CMD_ADS_RDDATA          0xD000
#define CMD_ADS_WRCFR           0xE000
#define CMD_ADS_DEFAULT_MODE    0xF000// CFR - Configuration Data Reg      D11 - D0
#define CF_CH_SELECT_MODE       0x0800     // 0 手动                      1 自动
#define CF_CCLK_SELECT          0x0400     // 0：CCLK = SCLK/2               1：CCLK = Internal OSC
#define CF_TRIGGER_SELECT       0x0200     // 0 自动                      1 手动--CONVST            if(This bit = 0)  D4 is ignored#define CF_PA11_POLARITY_SELECT     0x0080     // 0 EOC/INT 高有效                 1 低有效
#define CF_PA11_FUNCTION_SELECT     0x0040     // 0 用于INT                       1 用于EOC
#define CF_PA11_IO_SELECT       0x0020     // 0 PA11用于CDI 使能Chain       1 PA11用于EOC/INT输出
#define CF_AUTO_NAP_POW_DOWN_EN 0x0010     // 0 Enable auto nap power down  1 Disable
#define CF_NAP_POW_DOWN_EN      0x0008     // 0 Enable nap power down       1 Disable
#define CF_DEEP_POW_DOWN_EN     0x0004     // 0 Enable deep power down      1 Disable
#define CF_TAG_EN               0x0002     // 0 失能TAG bit               1 使能 TAG bit output at 17th SCLK
#define CF_SYS_RESET            0x0001     // 0 复位                      1 正常工作uint8_t ADS8328_SPI_Send4Bits(uint8_t data);
unsigned int ADS8328_SPI_Send12Bits(unsigned int byte);
unsigned int ADS8328_SPI_Send16Bits(unsigned int data);
unsigned int ADS8328_SPI_ReadHalfWord(void);void ADS8328_Read_CFR(unsigned int *data1);
void ADS8328_Write_CFR(unsigned int data);unsigned int ADS8328_Read_Data(void);extern void ADC_ADS8328_Init(void);#endif

ads8328.c

#include "ADS8328.h"
#include "delay.h"void ADS8328_SPI_GPIO_Config(void)
{/* 定义GPIO结构体 */GPIO_InitTypeDef  GPIO_InitStructure;SPI_InitTypeDef  SPI_InitStructure;/* 开启GPIO时钟 */RCC_APB2PeriphClockCmd ( ADS8328_SPI_CS_CLK|ADS8328_SPI_SCK_CLK|\ADS8328_SPI_MISO_CLK|\ADS8328_SPI_MOSI_CLK|\ADS8328_SPI_EOC_CLK|\ADS8328_SPI_CONVST_CLK, ENABLE );
//              RCC_APB2PeriphClockCmd ( ADS8328_SPI_SCK_CLK, ENABLE );
//        RCC_APB2PeriphClockCmd ( ADS8328_SPI_MISO_CLK, ENABLE );
//        RCC_APB2PeriphClockCmd ( ADS8328_SPI_MOSI_CLK, ENABLE );
//        RCC_APB2PeriphClockCmd ( ADS8328_SPI_EOC_CLK, ENABLE );
//        RCC_APB2PeriphClockCmd ( ADS8328_SPI_CONVST_CLK, ENABLE );/* 开启SPI时钟 */RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 ,ENABLE);/* ADS8328_SPI_CS_PIN引脚初始化，并设置为推挽输出 */GPIO_InitStructure.GPIO_Pin = ADS8328_SPI_CS_PIN;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;               GPIO_Init(ADS8328_SPI_CS_PORT, &GPIO_InitStructure);/* ADS8328_SPI_SCK_PIN引脚初始化，并设置为推挽输出 */GPIO_InitStructure.GPIO_Pin = ADS8328_SPI_SCK_PIN;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;               GPIO_Init(ADS8328_SPI_SCK_PORT, &GPIO_InitStructure);/* ADS8328_SPI_MOSI_PIN引脚初始化，并设置为推挽输出 */GPIO_InitStructure.GPIO_Pin = ADS8328_SPI_MOSI_PIN;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;               GPIO_Init(ADS8328_SPI_MOSI_PORT, &GPIO_InitStructure);/* ADS8328_SPI_MISO_PIN引脚初始化，并设置为浮空输入 */GPIO_InitStructure.GPIO_Pin = ADS8328_SPI_MISO_PIN;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;GPIO_Init(ADS8328_SPI_MISO_PORT, &GPIO_InitStructure);/* ADS8328_SPI_CONVST_PIN引脚初始化，并设置为推挽输出 */GPIO_InitStructure.GPIO_Pin = ADS8328_SPI_CONVST_PIN;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_Init(ADS8328_SPI_CONVST_PORT, &GPIO_InitStructure);/* ADS8328_SPI_EOC_PIN引脚初始化，并设置为浮空输入 */GPIO_InitStructure.GPIO_Pin = ADS8328_SPI_EOC_PIN;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;GPIO_Init(ADS8328_SPI_EOC_PORT, &GPIO_InitStructure);/* SPI1 configuration */SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //全双工模式SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //主模式SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //8位数据SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //空闲状态为高电平SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //数据在第一个边沿采样SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS为软件控制SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4; //波特率预分频为4SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //高位在前SPI_InitStructure.SPI_CRCPolynomial = 7;SPI_Init(SPI1, &SPI_InitStructure);/* Enable SPI1 */SPI_Cmd(SPI1, ENABLE); //开启SPI设备/* ADS8328_SPI_CS_HIGH为高电平 */ADS8328_SPI_CS(1);/* ADS8328_SPI_CONVST_HIGH为高电平 */ADS8328_SPI_CONVST(1);/* 延迟500ms */delay_ms(500);}uint8_t ADS8328_SPI_Send4Bits(uint8_t data)
{uint8_t num = 0;int i = 0;data &= 0x0F;for(i=0;i<4;i++){num <<= 1;ADS8328_SPI_SCK_HIGH;if((data & 0x08) >> 3){ADS8328_SPI_MOSI(1);}else{ADS8328_SPI_MOSI(0);}if(ADS8328_SPI_MISO_READ){num++;}delay_us(5);ADS8328_SPI_SCK_LOW;delay_us(5);data <<= 1;}delay_us(5);return(num);
}unsigned int ADS8328_SPI_Send16Bits(unsigned int data)
{unsigned int num = 0;int i = 16;while(i--){num <<= 1;ADS8328_SPI_SCK_HIGH;if((data & 0x8000) >> 15){ADS8328_SPI_MOSI(1);}else{ADS8328_SPI_MOSI(0);}if(ADS8328_SPI_MISO_READ){num++;}delay_us(5);ADS8328_SPI_SCK_LOW;delay_us(5);data <<= 1;}delay_us(5);return(num);
}unsigned int ADS8328_SPI_ReadHalfWord(void)
{unsigned int num = 0;int i = 16;while(i--){num <<= 1;ADS8328_SPI_SCK_HIGH;if(ADS8328_SPI_MISO_READ){num++;}ADS8328_SPI_SCK_LOW;}delay_us(5);return(num);
}void ADS8328_Write_CFR(unsigned int data)
{ADS8328_SPI_CS(0);ADS8328_SPI_Send16Bits(data);ADS8328_SPI_CS(1);
}void ADS8328_Read_CFR(unsigned int *data1)
{ADS8328_SPI_CS(0);*data1 = ADS8328_SPI_Send16Bits(0xC000)&0x0FFF;ADS8328_SPI_CS(1);
}unsigned int ADS8328_Read_Data(void)
{unsigned int ret = 0;ADS8328_SPI_CS(0);delay_us(3);ADS8328_SPI_CS(1);while(!ADS8328_SPI_EOC);ADS8328_SPI_CONVST(0);delay_us(1);ADS8328_SPI_CONVST(1);ADS8328_SPI_CS(0);ret = ADS8328_SPI_ReadHalfWord();ADS8328_SPI_CS(1);return ret;
}void ADS8328_Init_Config(void)
{unsigned int AD_Reg_Rd = 0;ADS8328_SPI_CONVST(0);delay_us(100);ADS8328_SPI_CONVST(1);ADS8328_SPI_CS(0);ADS8328_SPI_Send4Bits(0x0F);ADS8328_SPI_CS(1);delay_us(100);ADS8328_Read_CFR(&AD_Reg_Rd);ADS8328_Write_CFR(0x0EFF);ADS8328_Read_CFR(&AD_Reg_Rd);ADS8328_Write_CFR(0x02FD);ADS8328_Read_CFR(&AD_Reg_Rd);ADS8328_Write_CFR(0x06FF);ADS8328_Read_CFR(&AD_Reg_Rd);ADS8328_Write_CFR(0x02FD);ADS8328_Read_CFR(&AD_Reg_Rd);
}void ADS8328_Init(void)
{ADS8328_SPI_GPIO_Config();ADS8328_Init_Config();
}

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