/**
* Interrupt handler for capacitive keyboard events
*/
static void cap_change(void) {
// Read keyboard
int key_state = mpr121Read(TCH_STATL) | (mpr121Read(TCH_STATH) << 8);
uint32_t ts = realtime_get_unixtime();
// there appears to be a bug where it suddenly outputs a lot of bits set.
unsigned int v = key_state; // count the number of bits set in v
unsigned int c; // c accumulates the total bits set in v
for (c = 0; v; c++) {
v &= v - 1; // clear the least significant bit set
}
if (c > 3)
return;
// clear unconnected electrodes
key_state &= touchList;
// detect keys pressed & released
int keys_pressed = key_state & (~last_key_state); //TODO: ! bitwise NOT
int keys_released = (~key_state) & last_key_state; //TODO: ! bitwise NOT
if (!captouch_disable_messages) {
for (int key = 0; key < 16; key++) {
if (keys_pressed & (1 << key)) {
system_gui->receive_key(key, KEY_PRESSED);
press_time[key] = ts;
press_time_any = ts;
}
if (keys_released & (1 << key)) {
system_gui->receive_key(key, KEY_RELEASED);
release_time[key] = ts;
release_time_any = ts;
}
}
last_key_state = key_state;
}
}
char *cap_diagdata(int e) {
int elech = 0;
int elecl = 0;
if (e == 0)
elecl = mpr121Read(ELE0_DATAL);
if (e == 0)
elech = mpr121Read(ELE0_DATAH);
if (e == 1)
elecl = mpr121Read(ELE1_DATAL);
if (e == 1)
elech = mpr121Read(ELE1_DATAH);
if (e == 2)
elecl = mpr121Read(ELE2_DATAL);
if (e == 2)
elech = mpr121Read(ELE2_DATAH);
if (e == 3)
elecl = mpr121Read(ELE3_DATAL);
if (e == 3)
elech = mpr121Read(ELE3_DATAH);
if (e == 4)
elecl = mpr121Read(ELE4_DATAL);
if (e == 4)
elech = mpr121Read(ELE4_DATAH);
if (e == 5)
elecl = mpr121Read(ELE5_DATAL);
if (e == 5)
elech = mpr121Read(ELE5_DATAH);
if (e == 6)
elecl = mpr121Read(ELE6_DATAL);
if (e == 6)
elech = mpr121Read(ELE6_DATAH);
if (e == 7)
elecl = mpr121Read(ELE7_DATAL);
if (e == 7)
elech = mpr121Read(ELE7_DATAH);
if (e == 8)
elecl = mpr121Read(ELE8_DATAL);
if (e == 8)
elech = mpr121Read(ELE8_DATAH);
if (e == 9)
elecl = mpr121Read(ELE9_DATAL);
if (e == 9)
elech = mpr121Read(ELE9_DATAH);
if (e == 10)
elecl = mpr121Read(ELE10_DATAL);
if (e == 10)
elech = mpr121Read(ELE10_DATAH);
elech = elech & 0x3;
uint32_t elecv = ((uint32_t) elech << 8) | (uint32_t) elecl;
uint32_t elec_base = 0;
if (e == 0)
elec_base = ((uint32_t) ((uint8_t) mpr121Read(ELE0_BASE))) << 2;
if (e == 1)
elec_base = ((uint32_t) ((uint8_t) mpr121Read(ELE1_BASE))) << 2;
if (e == 2)
elec_base = ((int) mpr121Read(ELE2_BASE)) << 2;
if (e == 3)
elec_base = ((int) mpr121Read(ELE3_BASE)) << 2;
if (e == 4)
elec_base = ((int) mpr121Read(ELE4_BASE)) << 2;
if (e == 5)
elec_base = ((int) mpr121Read(ELE5_BASE)) << 2;
if (e == 6)
elec_base = ((int) mpr121Read(ELE6_BASE)) << 2;
if (e == 7)
elec_base = ((int) mpr121Read(ELE7_BASE)) << 2;
if (e == 8)
elec_base = ((int) mpr121Read(ELE8_BASE)) << 2;
if (e == 9)
elec_base = ((int) mpr121Read(ELE9_BASE)) << 2;
if (e == 10)
elec_base = ((int) mpr121Read(ELE10_BASE)) << 2;
uint32_t bs = mpr121Read(TCH_STATL);
bs = bs | ((0x1F & mpr121Read(TCH_STATH)) << 8);
uint32_t is_pressed = 0;
if (bs & (1 << e))
is_pressed = 1;
else
is_pressed = 0;
sprintf(c, "%"PRIu32" %"PRIu32" %"PRIu32" %"PRIu32"", elecv, elec_base, bs,
is_pressed);
return c;
}
bool cap_check() {
uint8 d = mpr121Read(ELE0_DATAL);
if (d == 255)
return false;
return true;
}
int DetectTouch::whichkey()
{
touchstatus = mpr121Read(0x01) << 8;
touchstatus |= mpr121Read(0x00);
n_key=0;
for (i=0; i<12; i++)
{
if (touchstatus & (1<<i))
{
n_key++;
keypress=1<<i;
}
}
if (n_key == 1)
{
Serial.print("You have touched a sensor");
switch (keypress)
{
case 1:
Serial.println(":0");
key = 0;
break;
case 2:
Serial.println(":1");
key = 1;
break;
case 4:
Serial.println(":2");
key = 2;
break;
case 8:
Serial.println(":3");
key = 3;
break;
case 16:
Serial.println(":4");
key = 4;
break;
case 32:
Serial.println(":5");
key = 5;
break;
case 64:
Serial.println(":6");
key = 6;
break;
case 128:
Serial.println(":7");
key = 7;
break;
case 256:
Serial.println(":8");
key = 8;
break;
case 512:
Serial.println(":9");
key = 9;
break;
case 1024:
Serial.println("10");
key = 10;
break;
case 2048:
Serial.println(":11");
key = 11;
break;
}
}
else
{
Serial.println("Press only single sensor");
key = -1;
}
return key;
}