# Gpio setting **URL:** \ **Category:** Legacy AirPrime modules\ **Created:** [November 16, 2009, 4:41pm UTC](https://forum.sierrawireless.com/t/gpio-setting/3864 "2009-11-16T16:41:11Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![foxalarm](https://avatars.discourse-cdn.com/v4/letter/f/b2d939/32.png) [@foxalarm](https://forum.sierrawireless.com/u/foxalarm)\ **Post date:** [November 16, 2009, 4:41pm UTC](https://forum.sierrawireless.com/t/gpio-setting/3864/1 "2009-11-16T16:41:11Z")
HI,i’m using a Q64 module and i must set up 2 pin, 1 IN / 1 OUT.I have realized this example making reference to Q64/WMP100 signals matching table. ```auto #include "adl_global.h" #define GPIO_OUTPUT_PIN 19 #define GPIO_INPUT_PIN 21 // GPIO service handle static s32 MyGPIOHandle_OUT; static s32 MyGPIOHandle_IN; s32 ReadValue; adl_ioDefs_t GpioConfig_OUT = ADL_IO_GPIO | GPIO_OUTPUT_PIN | ADL_IO_DIR_OUT; adl_ioDefs_t GpioConfig_IN = ADL_IO_GPIO | GPIO_INPUT_PIN | ADL_IO_DIR_IN; const u16 wm_apmCustomStackSize = 1024*3; s32 MyGpioEventHandle; void MyGpioEventHandler ( s32 GpioHandle, adl_ioEvent_e Event, u32 Size, void * Param ){ s32 ReadValue_IN; s32 ReadValue_OUT; TRACE (( 1, "EVENT" )); // Check event switch ( Event ){ case ADL_IO_EVENT_INPUT_CHANGED : //... } } // ***MAIN*** // void adl_main ( adl_InitType_e InitType ){ adl_ioWriteSingle ( MyGPIOHandle_OUT, &GpioConfig_OUT, FALSE ); adl_ioWriteSingle ( MyGPIOHandle_IN, &GpioConfig_IN, TRUE ); ReadValue = adl_ioReadSingle (MyGPIOHandle_IN, &GpioConfig_IN); TRACE (( 1, "PIN IN : %d",ReadValue )); MyGpioEventHandle = adl_ioEventSubscribe (MyGpioEventHandler); MyGPIOHandle_OUT = adl_ioSubscribe ( 1, &GpioConfig_OUT, 0, 0, 0 ); TRACE (( 1, "GPIO (%d): %d", GPIO_OUTPUT_PIN, &GpioConfig_OUT )); ReadValue = adl_ioReadSingle (MyGPIOHandle_IN, &GpioConfig_IN); TRACE (( 1, "PIN IN : %d",ReadValue )); MyGPIOHandle_IN = adl_ioSubscribe ( 1, &GpioConfig_IN, 1, 1, MyGpioEventHandle ); TRACE (( 1, "GPIO (%d): %d", GPIO_INPUT_PIN, &GpioConfig_OUT )); ReadValue = adl_ioReadSingle (MyGPIOHandle_IN, &GpioConfig_IN); TRACE (( 1, "PIN IN : %d",ReadValue )); } ``` In these conditions ReadValue = -3 (ADL\_RET\_ERR\_UNKNOWN\_HDL)… Instead if use command At+wiom=1, " GPIO19" , 1.1 for example,no problem… if I try to change pin ```auto #define GPIO_OUTPUT_PIN 3 #define GPIO_INPUT_PIN 16 ``` ReadValue = 0 !!! but i have not more the matching of the pin… Help 🙂 Regards ---
**Author:** ![davidc](https://avatars.discourse-cdn.com/v4/letter/d/a183cd/32.png) [@davidc](https://forum.sierrawireless.com/u/davidc)\ **Post date:** [November 16, 2009, 11:40pm UTC](https://forum.sierrawireless.com/t/gpio-setting/3864/2 "2009-11-16T23:40:20Z")
Hiya, In your main code, you haven’t subscribed to the ADL GPIO service before calling adl\_ioWriteSingle() and adl\_ioReadSingle() so your GPIO handles are undefined. Therefore the values of your handles are essentially ‘random noise’ - they contain watever value the RAM had in it when the CPU started. Try something like this, instead (interleaved with your existing code…): ```auto // ***MAIN*** // // GPIO service handle static s32 MyGPIOHandle_OUT = ERROR; // mark handles as 'unused' static s32 MyGPIOHandle_IN = ERROR; void adl_main ( adl_InitType_e InitType ) { // set up and connect to GPIO MyGpioEventHandle = adl_ioEventSubscribe (MyGpioEventHandler); MyGPIOHandle_IN = adl_ioSubscribe ( 1, &GpioConfig_IN, 1, 1, MyGpioEventHandle ); TRACE (( 1, "GPIO_IN handle: %d", MyGPIOHandle_IN )); MyGPIOHandle_OUT = adl_ioSubscribe ( 1, &GpioConfig_OUT, 0, 0, 0 ); TRACE (( 1, "GPIO_OUT handle: %d", MyGPIOHandle_OUT )); // operate on GPIO adl_ioWriteSingle ( MyGPIOHandle_OUT, &GpioConfig_OUT, FALSE ); adl_ioWriteSingle ( MyGPIOHandle_IN, &GpioConfig_IN, TRUE ); ReadValue = adl_ioReadSingle (MyGPIOHandle_IN, &GpioConfig_IN); TRACE (( 1, "PIN IN : %d",ReadValue )); TRACE (( 1, "GPIO (%d): %d", GPIO_OUTPUT_PIN, &GpioConfig_OUT )); ReadValue = adl_ioReadSingle (MyGPIOHandle_IN, &GpioConfig_IN); TRACE (( 1, "PIN IN : %d",ReadValue )); TRACE (( 1, "GPIO (%d): %d", GPIO_INPUT_PIN, &GpioConfig_OUT )); ReadValue = adl_ioReadSingle (MyGPIOHandle_IN, &GpioConfig_IN); TRACE (( 1, "PIN IN : %d",ReadValue )); } ``` Let us how you get on. ciao, Dave ---
**Author:** ![foxalarm](https://avatars.discourse-cdn.com/v4/letter/f/b2d939/32.png) [@foxalarm](https://forum.sierrawireless.com/u/foxalarm)\ **Post date:** [November 17, 2009, 8:04am UTC](https://forum.sierrawireless.com/t/gpio-setting/3864/3 "2009-11-17T08:04:39Z")
Thanks Dave, i try your code, but I obtain the same error (-3),it is as if I cannot setting those pin. Help 🙂 Regards ---
**Author:** ![davidc](https://avatars.discourse-cdn.com/v4/letter/d/a183cd/32.png) [@davidc](https://forum.sierrawireless.com/u/davidc)\ **Post date:** [November 17, 2009, 9:34am UTC](https://forum.sierrawireless.com/t/gpio-setting/3864/4 "2009-11-17T09:34:35Z")
Hiya, I’ll load your code into a Q2686 module when I’m at work tomorrow. Stay tuned. ciao, Dave ---
**Author:** ![foxalarm](https://avatars.discourse-cdn.com/v4/letter/f/b2d939/32.png) [@foxalarm](https://forum.sierrawireless.com/u/foxalarm)\ **Post date:** [November 17, 2009, 11:11am UTC](https://forum.sierrawireless.com/t/gpio-setting/3864/5 "2009-11-17T11:11:33Z")
On q2686 all ok , I do not receive no error ---
**Author:** ![paruthiv](https://avatars.discourse-cdn.com/v4/letter/p/eb8c5e/32.png) [@paruthiv](https://forum.sierrawireless.com/u/paruthiv)\ **Post date:** [November 23, 2009, 6:45am UTC](https://forum.sierrawireless.com/t/gpio-setting/3864/6 "2009-11-23T06:45:14Z")
Hi On Q64, the GPIO mapping is different and hence it is not always that something which works on WMP would also work on Q64 … Just read the Q64 User Guide once or better still ask your Distributor for the concerned mapping of GPIOs on Q64. cheers… 😃