Jurica Resetar / acn_nrf52_saadc

SAADC library and drivers for nrf52832.

Dependents:   acd52832_SAADC_Differential_input_EPD acd52832_Car_battery_ch acd52832_Car_battery_ch_2

Library to use aconno drivers for Nordic Semiconductor nrf52832 SAADC.

acd_nrf52_saadc.cpp@7:1093819c3bbf, 2017-09-28 (annotated)

Committer:
jurica238814
Date:
Thu Sep 28 14:42:00 2017 +0000
Revision:
7:1093819c3bbf
Parent:
6:57e342aaaca7
Child:
8:b4afe08821f5
Small changes added into initialization for a differential input. Refactoring TODO!

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Dautor 1:2d6e904c6843 1 #include "acd_nrf52_saadc.h"
Dautor 1:2d6e904c6843 2
Dautor 1:2d6e904c6843 3 // add and remove analog channels -> +/- maxcnt
Dautor 1:2d6e904c6843 4
Dautor 3:fcada8b3b567 5 NRF52_SAADC::NRF52_SAADC(){
Dautor 1:2d6e904c6843 6 NRF_SAADC->ENABLE = 1;
jurica238814 6:57e342aaaca7 7 memset(data, 0, sizeof(data)); // Just to make sure data is zero
Dautor 3:fcada8b3b567 8 NRF_SAADC->RESULT.PTR =(uint32_t)data;
jurica238814 6:57e342aaaca7 9 //NRF_SAADC->RESULT.MAXCNT = 0;
Dautor 1:2d6e904c6843 10 }
Dautor 1:2d6e904c6843 11
Dautor 1:2d6e904c6843 12 NRF52_SAADC::~NRF52_SAADC(){
Dautor 2:1e7d6ab5b04b 13 NRF_SAADC->ENABLE = 0;
Dautor 1:2d6e904c6843 14 }
Dautor 1:2d6e904c6843 15
Dautor 3:fcada8b3b567 16 void NRF52_SAADC::updateData(){
Dautor 1:2d6e904c6843 17 NRF_SAADC->TASKS_START = 1;
Dautor 1:2d6e904c6843 18 while(!NRF_SAADC->EVENTS_STARTED);
Dautor 1:2d6e904c6843 19 NRF_SAADC->TASKS_SAMPLE = 1;
jurica238814 6:57e342aaaca7 20 for(uint8_t i = 0; i < NRF_SAADC->RESULT.MAXCNT; ++i){
Dautor 4:616c6590bbd2 21 while(!NRF_SAADC->EVENTS_RESULTDONE);
Dautor 4:616c6590bbd2 22 while(!NRF_SAADC->EVENTS_DONE);
Dautor 4:616c6590bbd2 23 while(!NRF_SAADC->EVENTS_END);
Dautor 4:616c6590bbd2 24 while(NRF_SAADC->STATUS == 1); // while conversion is is progress
Dautor 4:616c6590bbd2 25 }
Dautor 4:616c6590bbd2 26 NRF_SAADC->TASKS_STOP = 1;
Dautor 4:616c6590bbd2 27 while(!NRF_SAADC->EVENTS_STOPPED);
Dautor 1:2d6e904c6843 28 }
Dautor 3:fcada8b3b567 29
Dautor 3:fcada8b3b567 30 bool NRF52_SAADC::addChannel(uint8_t pin){
jurica238814 6:57e342aaaca7 31 if(NRF_SAADC->RESULT.MAXCNT < 8){
Dautor 3:fcada8b3b567 32 int channel = NRF_SAADC->RESULT.MAXCNT;
Dautor 3:fcada8b3b567 33 NRF_SAADC->CH[channel].PSELP = pin; // Input positive pin is VDD = 9
jurica238814 7:1093819c3bbf 34 NRF_SAADC->CH[channel].PSELN = pin+1; // Input positive pin is VDD = 9
jurica238814 7:1093819c3bbf 35 NRF_SAADC->CH[channel].CONFIG = 0x00125000; // differential input
jurica238814 7:1093819c3bbf 36 //NRF_SAADC->CH[channel].CONFIG = 0x00020000; // reset
Dautor 3:fcada8b3b567 37 NRF_SAADC->RESULT.MAXCNT++;
Dautor 3:fcada8b3b567 38 return 0;
Dautor 3:fcada8b3b567 39 }
Dautor 3:fcada8b3b567 40 return 1;
Dautor 3:fcada8b3b567 41 }
Dautor 3:fcada8b3b567 42
Dautor 3:fcada8b3b567 43 void NRF52_SAADC::calibrate(){
Dautor 3:fcada8b3b567 44 NRF_SAADC->TASKS_CALIBRATEOFFSET = 1;
Dautor 3:fcada8b3b567 45 while(!NRF_SAADC->EVENTS_CALIBRATEDONE);
Dautor 3:fcada8b3b567 46 }