Configurable Pins

The config_pin module implements an output role, which can be assigned to any configurable pin (CP).

Build it from project configurablePinDemo.

Use either Web Manager or Command Line Interface to set up configuration in group configurable pin manager (CPM). Under Roles, find your role of Blinker. Assign it a CP of your choice and set State to Enabled.

Tip

If using the evaluation board, you must jumper your selected configurable pin on J2 to an external LED (and current limiting resistor) -- if some other role is enabled using your selected CP, this will fail. Observe the blinking with an LED or scope connected to your selected CP.

Function Details

The following is an overview of the functions used in the config_pin module.

static void blinkerThread(void *opaque) {...}

Look up role index using ltrx_cp_role_index_get() and print the role name and roll index to trouble log. While there is a thread, use ltrx_cp_write() to write to a configurable pin and then pause the thread with ltrx_thread_sleep().

void config_pin_module_startup(void) {...}

Notice use of the macro STACK_SIZE_GREEN_FROM_MAX_OBSERVED_STACK_USED when calling ltrx_thread_create() in the startup function. It was originally built with 2000 bytes of stack. Then the module was built and run. The actual stack was observed either via the Web Manager or the Command Line Interface under Diagnostics Threads. Find the Blinker thread, and the Stack used is shown. That value was plugged into the macro in the sample code.