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ADS131.c
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ADS131.c
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/**
**********************************************************************************
* @file ADS131.c
* @author Ali Moallem (https://github.com/AliMoal)
* @brief
* Functionalities of the this file:
* +
* +
* +
**********************************************************************************
*
*! Copyright (c) 2021 Mahda Embedded System (MIT License)
*!
*! Permission is hereby granted, free of charge, to any person obtaining a copy
*! of this software and associated documentation files (the "Software"), to deal
*! in the Software without restriction, including without limitation the rights
*! to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
*! copies of the Software, and to permit persons to whom the Software is
*! furnished to do so, subject to the following conditions:
*!
*! The above copyright notice and this permission notice shall be included in all
*! copies or substantial portions of the Software.
*!
*! THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
*! IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
*! FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
*! AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
*! LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
*! OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
*! SOFTWARE.
*!
**********************************************************************************
**/
//* Private Includes -------------------------------------------------------------- //
#include "ADS131.h"
//* Private Defines and Macros ---------------------------------------------------- //
#define ADS131_RawToAdcValue(oneData) ((int32_t)(((oneData[0] << 16) | (oneData[1] << 8) | (oneData[2])) << 8) / 256)
#define EnableRegistersInContinuousMode() ADC_Handler->ADC_CS_LOW(); \
Delay_US(5); \
ADC_Handler->ADC_Transmit(STOP); \
Delay_US(5); \
ADC_Handler->ADC_Transmit(SDATAC); \
Delay_US(5); \
ADC_Handler->ADC_CS_HIGH(); \
Delay_US(5)
#define DisableRegistersInContinuousMode() Delay_US(5); \
ADC_Handler->ADC_CS_LOW(); \
Delay_US(5); \
ADC_Handler->ADC_Transmit(RDATAC); \
Delay_US(5); \
ADC_Handler->ADC_Transmit(START); \
Delay_US(5); \
ADC_Handler->ADC_CS_HIGH(); \
Delay_US(5)
//* Others ------------------------------------------------------------------------ //
#ifdef Debug_Enable
#include <stdio.h> // for debug
#define PROGRAMLOG(arg...) printf(arg)
#else
#define PROGRAMLOG(arg...)
#endif
/**
** ==================================================================================
** ##### Enums #####
** ==================================================================================
**/
typedef enum
ADS131Commands_s {
// SYSTEM COMMANDS
WAKEUP = 0x02, // Wake-up from standby mode
STANDBY = 0x04, // Enter standby mode
RESET = 0x06, // Reset the device
START = 0x08, // Start or restart (synchronize) conversions
STOP = 0x0A, // Stop conversions
OFFSETCAL = 0x1A, // Channel offset calibration
// DATA READ COMMANDS
RDATAC = 0x10, // Enable read data continuous mode. This mode is the default mode at power-up. When in RDATAC mode, the RREG command is ignored.
SDATAC = 0x11, // Stop read data continuous mode
RDATA = 0x12, // Read data by command
// REGISTER READ COMMANDS
RREG = 0x20, // Read registers
WREG = 0x40 // Write registers
} ADS131Commands_t;
typedef enum
ADS131Register_s {
// DEVICE SETTINGS (Read-Only Registers)
ID = 0x00, // RESET VALUE: 0xD2
// GLOBAL SETTINGS ACROSS CHANNELS
CONFIG1 = 0x01, // RESET VALUE: 0x94
CONFIG2 = 0x02, // RESET VALUE: 0xE0
CONFIG3 = 0x03, // RESET VALUE: 0xE0
FAULT = 0x04, // RESET VALUE: 0x00
// CHANNEL-SPECIFIC SETTINGS
CH1SET = 0x05, // RESET VALUE: 0x10
CH2SET = 0x06, // RESET VALUE: 0x10
CH3SET = 0x07, // RESET VALUE: 0x10
CH4SET = 0x08, // RESET VALUE: 0x10
CH5SET = 0x09, // RESET VALUE: 0x10
CH6SET = 0x0A, // RESET VALUE: 0x10
CH7SET = 0x0B, // RESET VALUE: 0x10
CH8SET = 0x0C, // RESET VALUE: 0x10
// FAULT DETECT STATUS REGISTERS (Read-Only Registers)
FAULT_STATP = 0x12, // RESET VALUE: 0x00
FAULT_STATN = 0x13, // RESET VALUE: 0x00
// GPIO SETTINGS
GPIO = 0x14 // RESET VALUE: 0x0F
} ADS131Register_t;
/**
*! ==================================================================================
*! ##### Private Functions #####
*! ==================================================================================
**/
static uint8_t
ADS131_ReadReg (ADS131_Handler_t *ADC_Handler,ADS131Register_t ADS131REG)
{
uint8_t RecByte = 0;
ADC_Handler->ADC_CS_LOW();
Delay_US(5);
ADC_Handler->ADC_Transmit(RREG | ADS131REG);
Delay_US(5);
ADC_Handler->ADC_Transmit(0);
Delay_US(5);
RecByte = ADC_Handler->ADC_Receive();
Delay_US(5);
ADC_Handler->ADC_CS_HIGH();
return RecByte;
};
static void
ADS131_WriteReg (ADS131_Handler_t *ADC_Handler,ADS131Register_t ADS131REG, uint8_t RegisterValue)
{
ADC_Handler->ADC_CS_LOW();
Delay_US(5);
ADC_Handler->ADC_Transmit(WREG | ADS131REG);
Delay_US(5);
ADC_Handler->ADC_Transmit(0);
Delay_US(5);
ADC_Handler->ADC_Transmit(RegisterValue);
Delay_US(5);
ADC_Handler->ADC_CS_HIGH();
};
/**
** ==================================================================================
** ##### Public Functions #####
** ==================================================================================
**/
/**
* @brief Initializes The ADC and Library
* @note Defaults in Continuous Mode, 1kSPS and VREFF:2.4V, Fault Thershold is set to High-side: 95%, Low-side 5%
* @param ADC_Handler: Pointer Of Library Handler
* @param Parameters: Pointer Of ADC Parameters
* @param ChannelsConfig: Pointer Of Channels Configurations
* @param GPIOConfig: Pointer Of GPIO Configurations
* @retval None
*/
void
ADS131_Init(ADS131_Handler_t *ADC_Handler, ADS131_Parameters_t *Parameters, ADS131_ChannelsConfig_t *ChannelsConfig, ADS131_GPIOConfig_t *GPIOConfig)
{
if (!ADC_Handler)
return;
if(ADC_Handler->ADC_RESET_LOW)
ADC_Handler->ADC_RESET_LOW();
if(ADC_Handler->ADC_START_LOW)
ADC_Handler->ADC_START_LOW();
ADC_Handler->ADC_CS_LOW();
Delay_US(5);
ADC_Handler->ADC_Transmit(STOP);
Delay_US(5);
ADC_Handler->ADC_Transmit(SDATAC);
Delay_US(5);
ADC_Handler->ADC_Transmit(RESET);
Delay_US(5);
ADC_Handler->ADC_CS_HIGH();
Delay_US(100);
EnableRegistersInContinuousMode();
PROGRAMLOG("ID: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,ID));
uint8_t RegVal = 0;
if (Parameters)
{
RegVal = (0x90) | ((Parameters->DaisyChain ? 0 : 1) << 6) | (Parameters->OscillatorClkOutput << 5) | (Parameters->DataRate);
ADS131_WriteReg(ADC_Handler,CONFIG1,RegVal);
PROGRAMLOG("CONFIG1: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CONFIG1));
// RegVal = 0; // for Test
// ADS131_WriteReg(ADC_Handler,CONFIG2,RegVal); // for Test
// PROGRAMLOG("CONFIG2: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CONFIG2)); // for Test
RegVal = (0xC0) | (Parameters->IntRefVolt << 5) | (Parameters->OpAmpRef << 3) | (Parameters->OpAmpPowerDown << 2);
ADS131_WriteReg(ADC_Handler,CONFIG3,RegVal);
PROGRAMLOG("CONFIG3: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CONFIG3));
}
else
{
RegVal = 0x96; // 1kSPS
ADS131_WriteReg(ADC_Handler,CONFIG1,RegVal);
PROGRAMLOG("CONFIG1 (default): 0x%X - Must be 0x96\r\n",ADS131_ReadReg(ADC_Handler,CONFIG1));
RegVal = 0xC0; // VREFF: 2.4V
ADS131_WriteReg(ADC_Handler,CONFIG3,RegVal);
PROGRAMLOG("CONFIG3 (default): 0x%X - Must be 0xC1 or 0xC0\r\n",ADS131_ReadReg(ADC_Handler,CONFIG3));
}
if (ChannelsConfig)
{
RegVal = (ChannelsConfig->Ch1PowerDown << 7) | (ChannelsConfig->Ch1PGA << 4) | (ChannelsConfig->Ch1MUX);
ADS131_WriteReg(ADC_Handler,CH1SET,RegVal);
PROGRAMLOG("CH1SET: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CH1SET));
RegVal = (ChannelsConfig->Ch2PowerDown << 7) | (ChannelsConfig->Ch2PGA << 4) | (ChannelsConfig->Ch2MUX);
ADS131_WriteReg(ADC_Handler,CH2SET,RegVal);
PROGRAMLOG("CH2SET: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CH2SET));
RegVal = (ChannelsConfig->Ch3PowerDown << 7) | (ChannelsConfig->Ch3PGA << 4) | (ChannelsConfig->Ch3MUX);
ADS131_WriteReg(ADC_Handler,CH3SET,RegVal);
PROGRAMLOG("CH3SET: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CH1SET));
RegVal = (ChannelsConfig->Ch4PowerDown << 7) | (ChannelsConfig->Ch4PGA << 4) | (ChannelsConfig->Ch4MUX);
ADS131_WriteReg(ADC_Handler,CH4SET,RegVal);
PROGRAMLOG("CH4SET: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CH4SET));
RegVal = (ChannelsConfig->Ch5PowerDown << 7) | (ChannelsConfig->Ch5PGA << 4) | (ChannelsConfig->Ch5MUX);
ADS131_WriteReg(ADC_Handler,CH5SET,RegVal);
PROGRAMLOG("CH5SET: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CH5SET));
RegVal = (ChannelsConfig->Ch6PowerDown << 7) | (ChannelsConfig->Ch6PGA << 4) | (ChannelsConfig->Ch6MUX);
ADS131_WriteReg(ADC_Handler,CH6SET,RegVal);
PROGRAMLOG("CH6SET: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CH6SET));
RegVal = (ChannelsConfig->Ch7PowerDown << 7) | (ChannelsConfig->Ch7PGA << 4) | (ChannelsConfig->Ch7MUX);
ADS131_WriteReg(ADC_Handler,CH7SET,RegVal);
PROGRAMLOG("CH7SET: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CH7SET));
RegVal = (ChannelsConfig->Ch8PowerDown << 7) | (ChannelsConfig->Ch8PGA << 4) | (ChannelsConfig->Ch8MUX);
ADS131_WriteReg(ADC_Handler,CH8SET,RegVal);
PROGRAMLOG("CH8SET: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,CH8SET));
}
if(GPIOConfig)
{
RegVal = 0x50;//(GPIOConfig->GPIO4High << 7) | (GPIOConfig->GPIO3High << 6) | (GPIOConfig->GPIO2High << 5) | (GPIOConfig->GPIO1High << 4) |(GPIOConfig->GPIO4Input << 3) | (GPIOConfig->GPIO3Input << 2) | (GPIOConfig->GPIO2Input << 1) | (GPIOConfig->GPIO1Input);
ADS131_WriteReg(ADC_Handler,GPIO,RegVal);
PROGRAMLOG("GPIO: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,GPIO));
}
DisableRegistersInContinuousMode();
};
/**
* @brief Reads ADC Data
* @note Call This function when DRDY pin got LOW
* @param ADC_Handler: Pointer Of Library Handler
* @param State: Pointer Of ADC Statement | 3 Elements ([0]: MSB)
* @param ChSamples: Pointer Of Channels Samples | 8 Elements ([0]: Ch1)
* @retval None
*/
void
ADS131_ReadData(ADS131_Handler_t *ADC_Handler, uint8_t *State /* 3 Elements ([0]: MSB) */,int32_t *ChSamples /* 8 Elements ([0]: Ch1)*/)
{
ADC_Handler->ADC_CS_LOW();
Delay_US(5);
State[0] = ADC_Handler->ADC_Receive();
Delay_US(1);
State[1] = ADC_Handler->ADC_Receive();
Delay_US(1);
State[2] = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[0].Part3 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[0].Part2 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[0].Part1 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[1].Part3 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[1].Part2 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[1].Part1 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[2].Part3 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[2].Part2 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[2].Part1 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[3].Part3 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[3].Part2 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[3].Part1 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[4].Part3 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[4].Part2 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[4].Part1 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[5].Part3 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[5].Part2 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[5].Part1 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[6].Part3 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[6].Part2 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[6].Part1 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[7].Part3 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[7].Part2 = ADC_Handler->ADC_Receive();
Delay_US(1);
ADC_Handler->ChannelsData[7].Part1 = ADC_Handler->ADC_Receive();
Delay_US(5);
ADC_Handler->ADC_CS_HIGH();
ChSamples[0] = ADC_Handler->ChannelsData[0].INT32 / 256;
ChSamples[1] = ADC_Handler->ChannelsData[1].INT32 / 256;
ChSamples[2] = ADC_Handler->ChannelsData[2].INT32 / 256;
ChSamples[3] = ADC_Handler->ChannelsData[3].INT32 / 256;
ChSamples[4] = ADC_Handler->ChannelsData[4].INT32 / 256;
ChSamples[5] = ADC_Handler->ChannelsData[5].INT32 / 256;
ChSamples[6] = ADC_Handler->ChannelsData[6].INT32 / 256;
ChSamples[7] = ADC_Handler->ChannelsData[7].INT32 / 256;
}
/**
* @brief Configures GPIO Settings
* @param ADC_Handler: Pointer Of Library Handler
* @param GPIOConfig: Pointer Of GPIOs Configurations
* @retval None
*/
void
ADS131_ConfigGPIO(ADS131_Handler_t *ADC_Handler,ADS131_GPIOConfig_t *GPIOConfig)
{
if((!GPIOConfig) || (!ADC_Handler))
return;
EnableRegistersInContinuousMode();
uint8_t RegVal = (GPIOConfig->GPIO4High << 7) | (GPIOConfig->GPIO3High << 6) | (GPIOConfig->GPIO2High << 5) | (GPIOConfig->GPIO1High << 4) |(GPIOConfig->GPIO4Input << 3) | (GPIOConfig->GPIO3Input << 2) | (GPIOConfig->GPIO2Input << 1) | (GPIOConfig->GPIO1Input);
ADS131_WriteReg(ADC_Handler,GPIO,RegVal);
PROGRAMLOG("GPIO: 0x%X\r\n",ADS131_ReadReg(ADC_Handler,GPIO));
DisableRegistersInContinuousMode();
}
/**
* @brief Reads GPIO Data
* @param ADC_Handler: Pointer Of Library Handler
* @param GPIOstate: Pointer Of GPIOs Statements | 4 Element ([0]: GPIO1)
* @retval None
*/
void
ADS131_ReadGPIO(ADS131_Handler_t *ADC_Handler, bool *GPIOstate /* 4 Element ([0]: GPIO1)*/)
{
EnableRegistersInContinuousMode();
uint8_t RegVal = ADS131_ReadReg(ADC_Handler,GPIO);
PROGRAMLOG("GPIO: 0x%X\r\n",RegVal);
DisableRegistersInContinuousMode();
GPIOstate[0] = (RegVal >> 4) & 1;
GPIOstate[1] = (RegVal >> 5) & 1;
GPIOstate[2] = (RegVal >> 6) & 1;
GPIOstate[3] = (RegVal >> 7) & 1;
}