/* B0P18 is #IRQ line of the touchpad */
void button_init_device(void)
{
mpr121_init(0xb4);
mpr121_soft_reset();
mpr121_set_config(&config);
queue_init(&mpr121_queue, true);
create_thread(mpr121_thread, mpr121_stack, sizeof(mpr121_stack), 0,
mpr121_thread_name IF_PRIO(, PRIORITY_USER_INTERFACE) IF_COP(, CPU));
/* enable interrupt */
imx233_pinctrl_acquire(0, 18, "mpr121_int");
imx233_pinctrl_set_function(0, 18, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_enable_gpio(0, 18, false);
imx233_pinctrl_setup_irq(0, 18, true, true, false, &mpr121_irq_cb, 0);
/* generic part */
imx233_button_init();
}
int main()
{
mpr121_context dev = mpr121_init(MPR121_I2C_BUS, MPR121_DEFAULT_I2C_ADDR);
if(mpr121_config_an3944(dev) != UPM_SUCCESS){
printf("unable to configure device\n");
}
uint32_t states;
while(1){
if(mpr121_read_buttons(dev, &states, 0) != UPM_SUCCESS){
printf("Error while reading button values\n");
}
printf("retrieved button states: %d\n", states);
upm_delay(1);
}
mpr121_close(dev);
printf("all done!!\n");
return 0;
}
