Nikolai Trushnikov / ADS1248-1

808

Dependents:   Chromatograph_Mobile

ads1248.cpp@1:54015254fc18, 2020-08-11 (annotated)

Committer:
nikmaos
Date:
Tue Aug 11 19:13:08 2020 +0000
Revision:
1:54015254fc18
Parent:
0:1b92bdad27f6
Child:
2:ccfbc827eb2c
1108

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nikmaos 0:1b92bdad27f6 1 #include "ads1248.h"
nikmaos 0:1b92bdad27f6 2
nikmaos 0:1b92bdad27f6 3 unsigned char ADS1248SleepCommand( void )
nikmaos 0:1b92bdad27f6 4 {
nikmaos 0:1b92bdad27f6 5 DS1248_CS = 0;
nikmaos 0:1b92bdad27f6 6 SPI1MasterTransferByte(DS1248_SLEEP_COMMAND);
nikmaos 0:1b92bdad27f6 7 DS1248_CS=1;
nikmaos 0:1b92bdad27f6 8 DS1248_START = 0;
nikmaos 0:1b92bdad27f6 9 return 0;
nikmaos 0:1b92bdad27f6 10 }
nikmaos 0:1b92bdad27f6 11
nikmaos 0:1b92bdad27f6 12 unsigned char ADS1248WakeupCommand( void )
nikmaos 0:1b92bdad27f6 13 {
nikmaos 0:1b92bdad27f6 14 DS1248_CS = 0;
nikmaos 0:1b92bdad27f6 15 DS1248_START = 1;
nikmaos 0:1b92bdad27f6 16 SPI1MasterTransferByte(DS1248_WAKEUP_COMMAND);
nikmaos 0:1b92bdad27f6 17 DS1248_CS = 1;
nikmaos 0:1b92bdad27f6 18 return 0;
nikmaos 0:1b92bdad27f6 19 }
nikmaos 0:1b92bdad27f6 20
nikmaos 0:1b92bdad27f6 21 unsigned char ADS1248ReadRegister( unsigned char reg, unsigned char num )
nikmaos 0:1b92bdad27f6 22 {
nikmaos 0:1b92bdad27f6 23 char res[num];
nikmaos 0:1b92bdad27f6 24 DS1248_CS = 0;
nikmaos 0:1b92bdad27f6 25 SPI1MasterTransferByte(DS1248_RREG_COMMAND | ( reg & 0x0F ));
nikmaos 0:1b92bdad27f6 26 SPI1MasterTransferByte(num - 1);
nikmaos 0:1b92bdad27f6 27 while (num--)
nikmaos 0:1b92bdad27f6 28 {
nikmaos 0:1b92bdad27f6 29 res[num]=SPI1MasterTransferByte(DS1248_NOP_COMMAND);
nikmaos 0:1b92bdad27f6 30 }
nikmaos 0:1b92bdad27f6 31 DS1248_CS = 1;
nikmaos 0:1b92bdad27f6 32 return res[0];
nikmaos 0:1b92bdad27f6 33 }
nikmaos 0:1b92bdad27f6 34
nikmaos 0:1b92bdad27f6 35 unsigned char ADS1248WriteRegister( unsigned char reg, unsigned char num, uint8_t data)
nikmaos 0:1b92bdad27f6 36 {
nikmaos 0:1b92bdad27f6 37 DS1248_CS = 0;
nikmaos 0:1b92bdad27f6 38 SPI1MasterTransferByte(DS1248_WREG_COMMAND | ( reg & 0x0F ));
nikmaos 0:1b92bdad27f6 39 SPI1MasterTransferByte(num - 1);
nikmaos 0:1b92bdad27f6 40 SPI1MasterTransferByte(data);
nikmaos 0:1b92bdad27f6 41 SPI1MasterTransferByte(DS1248_NOP_COMMAND);
nikmaos 0:1b92bdad27f6 42 DS1248_CS = 1;
nikmaos 0:1b92bdad27f6 43 return 0;
nikmaos 0:1b92bdad27f6 44 }
nikmaos 0:1b92bdad27f6 45
nikmaos 0:1b92bdad27f6 46 unsigned char ADS1248StartConversion( void )
nikmaos 0:1b92bdad27f6 47 {
nikmaos 0:1b92bdad27f6 48 DS1248_START = 1;
nikmaos 0:1b92bdad27f6 49
nikmaos 0:1b92bdad27f6 50 //delay_us ( 5 );
nikmaos 0:1b92bdad27f6 51
nikmaos 0:1b92bdad27f6 52 DS1248_START = 0;
nikmaos 0:1b92bdad27f6 53 return 0;
nikmaos 0:1b92bdad27f6 54 }
nikmaos 0:1b92bdad27f6 55
nikmaos 0:1b92bdad27f6 56 unsigned long ADS1248ReadData( ADS1248_t * ads )
nikmaos 0:1b92bdad27f6 57 {
nikmaos 0:1b92bdad27f6 58
nikmaos 0:1b92bdad27f6 59 union{
nikmaos 0:1b92bdad27f6 60 struct{
nikmaos 1:54015254fc18 61 uint8_t
nikmaos 1:54015254fc18 62 b1,b2,b3;
nikmaos 1:54015254fc18 63 };
nikmaos 1:54015254fc18 64 uint32_t all;
nikmaos 0:1b92bdad27f6 65 }data;
nikmaos 0:1b92bdad27f6 66 data.all=0;
nikmaos 0:1b92bdad27f6 67
nikmaos 0:1b92bdad27f6 68 DS1248_CS = 0;
nikmaos 0:1b92bdad27f6 69 wait_us(1);
nikmaos 0:1b92bdad27f6 70 SPI1MasterTransferByte(DS1248_RDATA_COMMAND);
nikmaos 0:1b92bdad27f6 71 data.b3=SPI1MasterTransferByte(DS1248_NOP_COMMAND);
nikmaos 0:1b92bdad27f6 72 data.b2=SPI1MasterTransferByte(DS1248_NOP_COMMAND);
nikmaos 0:1b92bdad27f6 73 data.b1=SPI1MasterTransferByte(DS1248_NOP_COMMAND);
nikmaos 0:1b92bdad27f6 74 wait_us(1);
nikmaos 0:1b92bdad27f6 75 DS1248_CS = 1;
nikmaos 0:1b92bdad27f6 76
nikmaos 0:1b92bdad27f6 77 return data.all;
nikmaos 0:1b92bdad27f6 78 }
nikmaos 0:1b92bdad27f6 79
nikmaos 0:1b92bdad27f6 80 unsigned char ADS1248SettingReg ( ADS1248_t * ads )
nikmaos 0:1b92bdad27f6 81 {
nikmaos 0:1b92bdad27f6 82 DS1248_START = 1;
nikmaos 0:1b92bdad27f6 83 DS1248_CS = 0;
nikmaos 0:1b92bdad27f6 84 wait_us(1);
nikmaos 0:1b92bdad27f6 85 SPI1MasterTransferByte(DS1248_RESET_COMMAND);
nikmaos 0:1b92bdad27f6 86 wait_us(600);
nikmaos 0:1b92bdad27f6 87 SPI1MasterTransferByte(DS1248_SDATAC_COMMAND);
nikmaos 0:1b92bdad27f6 88
nikmaos 0:1b92bdad27f6 89 ADS1248WriteRegister ( DS1248_REGISTER_MUX0, 1, ads->MUX0.all );
nikmaos 0:1b92bdad27f6 90 ADS1248WriteRegister ( DS1248_REGISTER_VBIAS, 1,ads->VBIAS.all);
nikmaos 0:1b92bdad27f6 91 ADS1248WriteRegister ( DS1248_REGISTER_MUX1, 1, ads->MUX1.all );
nikmaos 0:1b92bdad27f6 92 ADS1248WriteRegister ( DS1248_REGISTER_SYS0, 1, ads->SYS0.all );
nikmaos 0:1b92bdad27f6 93 ADS1248WriteRegister ( DS1248_REGISTER_IDAC0,1, ads->IDAC0.all);
nikmaos 0:1b92bdad27f6 94 ADS1248WriteRegister ( DS1248_REGISTER_IDAC1,1, ads->IDAC1.all);
nikmaos 0:1b92bdad27f6 95 ADS1248WriteRegister ( DS1248_REGISTER_FSC0,1, ads->FSC.FSC0);
nikmaos 0:1b92bdad27f6 96 ADS1248WriteRegister ( DS1248_REGISTER_FSC1,1, ads->FSC.FSC1);
nikmaos 0:1b92bdad27f6 97 ADS1248WriteRegister ( DS1248_REGISTER_FSC2,1, ads->FSC.FSC2);
nikmaos 0:1b92bdad27f6 98
nikmaos 0:1b92bdad27f6 99 SPI1MasterTransferByte(DS1248_SYNC_COMMAND);
nikmaos 0:1b92bdad27f6 100 wait_us(1);
nikmaos 0:1b92bdad27f6 101 DS1248_CS = 1;
nikmaos 0:1b92bdad27f6 102 return 0;
nikmaos 0:1b92bdad27f6 103
nikmaos 0:1b92bdad27f6 104 }
nikmaos 1:54015254fc18 105
nikmaos 1:54015254fc18 106 //вызывать вместо простого чтения АЦП
nikmaos 1:54015254fc18 107 unsigned long ADS1248ReadCalibratedData(ADS1248_t * ads)
nikmaos 1:54015254fc18 108 {
nikmaos 1:54015254fc18 109 unsigned long result=0;
nikmaos 1:54015254fc18 110 //проверка адекватности коэффициентов (не доделана)
nikmaos 1:54015254fc18 111 if ((ads->Calibr.k>0)&&(ads->Calibr.b<0x8000000))
nikmaos 1:54015254fc18 112 result = ads->Calibr.k*ADS1248ReadData(ads)+ads->Calibr.b;
nikmaos 1:54015254fc18 113 else return (0);
nikmaos 1:54015254fc18 114 if (result & 0xFF000000)
nikmaos 1:54015254fc18 115 /*Если результат переполнен из-за коэффициентов то данные испорчены.
nikmaos 1:54015254fc18 116 Наверное можно просто отбросить старший байт или лучше приравнять максимальному 0x00FFFFFF*/
nikmaos 1:54015254fc18 117 return 0;
nikmaos 1:54015254fc18 118 }
nikmaos 1:54015254fc18 119
nikmaos 1:54015254fc18 120 //программная калибровка через терминал, без использования регистров микросхемы
nikmaos 1:54015254fc18 121 void ADS1248CalibrateSoft(ADS1248_t * ads, /*костыль костылей*/float (*btf)(unsigned char*))
nikmaos 1:54015254fc18 122 {
nikmaos 1:54015254fc18 123 //тут остановить все управляющие воздействия и считывание. Или перед использованием функции.
nikmaos 1:54015254fc18 124 /*
nikmaos 1:54015254fc18 125
nikmaos 1:54015254fc18 126 */
nikmaos 1:54015254fc18 127 UART.printf("ADS CALIBRATE:\r\n");
nikmaos 1:54015254fc18 128 __disable_irq ();
nikmaos 1:54015254fc18 129 UART_gets(16);
nikmaos 1:54015254fc18 130 UART.printf("%s\r\n",str);
nikmaos 1:54015254fc18 131 if(str[0]=='k'){
nikmaos 1:54015254fc18 132 float result = btf(str);
nikmaos 1:54015254fc18 133 UART.printf("%f\r\n",result);
nikmaos 1:54015254fc18 134 }
nikmaos 1:54015254fc18 135 __enable_irq ();
nikmaos 1:54015254fc18 136 }