Readiing humidity from HTU21D sensor using TWI

RE: Readiing humidity from HTU21D sensor using TWI

g.joshi — Mon, 24 Apr 2017 14:41:09 GMT

I am using SDK v 12.2.0 and my pca board is pca10040 and everytime i try to run this program i get the fatal error or blank screen. Can somebody help ?

RE: Readiing humidity from HTU21D sensor using TWI

sansil — Thu, 16 Mar 2017 02:33:21 GMT

Hi, Excellent post!

I tried to run the code in sdk 11.0 and keil, but i have the following error:

Build target 'nrf52_mpw3'
compiling main.c...
..\..\main.c(58): error:  #20: identifier "TWI0_USE_EASY_DMA" is undefined
  static const nrf_drv_twi_t m_twi_master = 
RF_DRV_TWI_INSTANCE(MASTER_TWI_INST);
..\..\main.c(91): error:  #20: identifier "NRF_DRV_TWI_TX_DONE" is undefined
          case NRF_DRV_TWI_TX_DONE:
..\..\main.c(94): error:  #20: identifier "NRF_DRV_TWI_RX_DONE" is undefined
          case NRF_DRV_TWI_RX_DONE:
..\..\main.c(97): error:  #20: identifier "NRF_DRV_TWI_ERROR" is undefined
          case NRF_DRV_TWI_ERROR:
..\..\main.c(140): error:  #140: too many arguments in function call
      ret_code = nrf_drv_twi_rx(&m_twi_master, 
TU21D_ADDRESS, returned_over_I2C, 3, 
alse); //Get raw humidity data   
..\..\main.c(169): error:  #140: too many arguments in function call
      ret_code = nrf_drv_twi_rx(&m_twi_master, 
TU21D_ADDRESS, returned_over_I2C, 3, 
alse); //Get raw humidity data
..\..\main.c(201): warning:  #167-D: argument of type "void (*)(nrf_drv_twi_evt_t *)" is incompatible with parameter of type "nrf_drv_twi_evt_handler_t"
          ret_code = nrf_drv_twi_init(&m_twi_master, &config, twi_event_handler);    
..\..\main.c(201): error:  #165: too few arguments in function call
          ret_code = nrf_drv_twi_init(&m_twi_master, &config, twi_event_handler);    
..\..\main.c: 1 warning, 7 errors

Any idea? Thank you in advance

RE: Readiing humidity from HTU21D sensor using TWI

ninoq — Wed, 22 Feb 2017 07:52:48 GMT

Linking error fixed- see this. The application is working - getting humidity every 2 secs. However have not yet resolved compiler warning.

RE: Readiing humidity from HTU21D sensor using TWI

ninoq — Wed, 22 Feb 2017 01:37:16 GMT

I'm using an nRF52 DK board and SDK 11. I downloaded the example code and extracted it with 7-ZIP to a folder I created under .....\examples\peripheral. It compiles with a warning:

....\main.c(199): warning: #167-D: argument of type "void (*)(nrf_drv_twi_evt_t *)" is incompatible with parameter of type "nrf_drv_twi_evt_handler_t" ret_code = nrf_drv_twi_init(&m_twi_master, &config, twi_event_handler, ;

but the target is not created the error message is:

._build\nrf52_mpw3.axf: Error: L6218E: Undefined symbol app_error_fault_handler (referred from app_error.o).

I'd appreciate some help.

RE: Readiing humidity from HTU21D sensor using TWI

samchang — Mon, 25 Apr 2016 05:26:33 GMT

Is this example also works on nrf51-DK directly? Or I need to replace some of these programs in order to use in nrf51-DK

RE: Readiing humidity from HTU21D sensor using TWI

Anders Strand — Tue, 01 Mar 2016 10:27:42 GMT

@kanchun: Try placing the "twi_humidity_readings" folder in nRF52_SDK\examples

RE: Readiing humidity from HTU21D sensor using TWI

kanchun — Mon, 29 Feb 2016 03:13:46 GMT

i have the following error;

*** Using Compiler 'V5.06 update 1 (build 61)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin'Rebuild target 'nrf52_mpw3'compiling main.c.....\..\main.c(25): error: #5: cannot open source input file "app_uart.h": No such file or directory #include "app_uart.h"..\..\main.c: 0 warnings, 1 errorcompiling bsp.c..."no source": Error: #5: cannot open source input file "..\..\..\..\bsp\bsp.c": No such file or directory..\..\..\..\bsp\bsp.c: 0 warnings, 1 errorcompiling app_uart_fifo.c..."no source": Error:
#5: cannot open source input file "..\..\..\..\..\components\libraries\uart\app_uart_fifo.c": No such file or directory..\..\..\..\..\components\libraries\uart\app_uart_fifo.c: 0 warnings, 1 errorcompiling nrf_delay.c..."no source": Error: #5: cannot open source input file "..\..\..\..\..\components\drivers_nrf\delay\nrf_delay.c": No such file or directory..\..\..\..\..\components\drivers_nrf\delay\nrf_delay.c: 0 warnings, 1 errorcompiling nrf_drv_common.c..."no source": Error:
#5: cannot open source input file "..\..\..\..\..\components\drivers_nrf\common\nrf_drv_common.c": No such file or directory..\..\..\..\..\components\drivers_nrf\common\nrf_drv_common.c: 0 warnings, 1 errorcompiling nrf_drv_gpiote.c..."no source": Error:
#5: cannot open source input file "..\..\..\..\..\components\drivers_nrf\gpiote\nrf_drv_gpiote.c": No such file or directory..\..\..\..\..\components\drivers_nrf\gpiote\nrf_drv_gpiote.c: 0 warnings, 1 errorcompiling nrf_drv_twi.c..."no source": Error:
#5: cannot open source input file "..\..\..\..\..\components\drivers_nrf\twi_master\nrf_drv_twi.c": No such file or directory..\..\..\..\..\components\drivers_nrf\twi_master\nrf_drv_twi.c: 0 warnings, 1 errorcompiling nrf_drv_twis.c..."no source": Error:
#5: cannot open source input file "..\..\..\..\..\components\drivers_nrf\twis_slave\nrf_drv_twis.c": No such file or directory..\..\..\..\..\components\drivers_nrf\twis_slave\nrf_drv_twis.c: 0 warnings, 1 errorcompiling nrf_drv_uart.c..."no source": Error:
#5: cannot open source input file "..\..\..\..\..\components\drivers_nrf\uart\nrf_drv_uart.c": No such file or directory..\..\..\..\..\components\drivers_nrf\uart\nrf_drv_uart.c: 0 warnings, 1 errorcompiling app_button.c..."no source": Error: #5: cannot open source input file "..\..\..\..\..\components\libraries\button\app_button.c": No such file or directory..\..\..\..\..\components\libraries\button\app_button.c: 0 warnings, 1 errorcompiling app_error.c..."no source": Error: #5: cannot open source input file "..\..\..\..\..\components\libraries\util\app_error.c": No such file or directory..\..\..\..\..\components\libraries\util\app_error.c: 0 warnings, 1 errorcompiling app_fifo.c..."no source": Error: #5: cannot open source input file "..\..\..\..\..\components\libraries\fifo\app_fifo.c": No such file or directory..\..\..\..\..\components\libraries\fifo\app_fifo.c: 0 warnings, 1 errorcompiling app_timer.c..."no source": Error: #5: cannot open source input file "..\..\..\..\..\components\libraries\timer\app_timer.c": No such file or directory..\..\..\..\..\components\libraries\timer\app_timer.c: 0 warnings, 1 errorcompiling app_util_platform.c..."no source": Error: #5: cannot open source input file "..\..\..\..\..\components\libraries\util\app_util_platform.c": No such file or  directory..\..\..\..\..\components\libraries\util\app_util_platform.c: 0 warnings, 1 errorcompiling nrf_assert.c..."no source": Error: #5: cannot open source input file "..\..\..\..\..\components\libraries\util\nrf_assert.c": No such file or directory..\..\..\..\..\components\libraries\util\nrf_assert.c: 0 warnings, 1 errorcompiling retarget.c..."no source": Error: #5: cannot open source input file "..\..\..\..\..\components\libraries\uart\retarget.c": No such file or directory..\..\..\..\..\components\libraries\uart\retarget.c: 0 warnings, 1 errorcompiling nrf_drv_timer.c..."no source": Error:
#5: cannot open source input file "..\..\..\..\..\components\drivers_nrf\timer\nrf_drv_timer.c": No such file or directory..\..\..\..\..\components\drivers_nrf\timer\nrf_drv_timer.c: 0 warnings, 1 errorcompiling SEGGER_RTT.c..."no source": Error: #5: cannot open source input file "C:\Keil_v5\ARM\Pack\NordicSemiconductor\RTT\SEGGER_RTT.c": No such file or directoryC:\Keil_v5\ARM\Pack\NordicSemiconductor\RTT\SEGGER_RTT.c: 0 warnings, 1 errorcompiling SEGGER_RTT_printf.c..."no source": Error: #5: cannot open source input file "C:\Keil_v5\ARM\Pack\NordicSemiconductor\RTT\SEGGER_RTT_printf.c": No such file or directoryC:\Keil_v5\ARM\Pack\NordicSemiconductor\RTT\SEGGER_RTT_printf.c: 0 warnings, 1 errorcompiling RTT_Syscalls_KEIL.c..."no source": Error: #5: cannot open source input file "C:\Keil_v5\ARM\Pack\NordicSemiconductor\Syscalls\RTT_Syscalls_KEIL.c": No such file or directoryC:\Keil_v5\ARM\Pack\NordicSemiconductor\Syscalls\RTT_Syscalls_KEIL.c: 0 warnings, 1 errorassembling arm_startup_nrf52.s...compiling system_nrf52.c...".\_build\nrf52_mpw3.axf"
- 1 Error(s), 0 Warning(s).Target not created.Build Time Elapsed: 00:00:13

seems some of the files missing.

Please help. Thanks,

Kan.