Hello,
I've been trying to write my own TSI procedure which is heavily based on this example : Using the touch interface on the Freescale Freedom Development Platform « The Embedded Beat: Freesca...
Everything seems to work fine untill i reach "while(!(TSI0_GENCS &= TSI_GENCS_EOSF_MASK));" command. Kl25z is running 48MHz in PEE mode.
Debugger shows that whole GENC register is cleared as soon as i'm checking if scan is completed. Do you have any clues, hints ?
I'm looking forward to your reply.
My code is showed below:
void TSI_init(void)
{
SIM_SCGC5 |= SIM_SCGC5_PORTB_MASK; //sygnał zegarowy na PORTB
SIM_SCGC5 |= SIM_SCGC5_TSI_MASK; // sygnał zegarowy na moduł TSI
// Enable GPIO pins as TSI channels
PORTB_PCR16 |= PORT_PCR_MUX(0); // multipleks PTB16 as TSI channel 9
PORTB_PCR17 |= PORT_PCR_MUX(0); // multipleks PTB17 as TSI channel 10
TSI0_GENCS |= (TSI_GENCS_ESOR_MASK
| TSI_GENCS_MODE(0) // Non-noise detection -> tylko dla srodowisk z dużymi zakłoceniami EMI
| TSI_GENCS_REFCHRG(4) // 8 micro-amp charge ->prąd referencjnego oscylatora
| TSI_GENCS_DVOLT(0) // Set voltage rails -> ustaw szyny Vp=1,33V Vmin=0,30V
| TSI_GENCS_EXTCHRG(7) // Set charge/discharge current -> prąd oscylatora zewnętrznego 64uA
| TSI_GENCS_PS(4) // Frequency divided by 16 -> częstotliwosć oscylatora zewnętrznego
| TSI_GENCS_NSCN(11) // Scan electrode count -> skanuj elektrodę 12x
//| TSI_GENCS_TSIIEN_MASK // interrupts
| TSI_GENCS_STPE_MASK // pozwol na prace TSI w kazdym z trybów pracy procesora
// | TSI_GENCS_STM_MASK // Scan trigger type software
// 0 = software
);
// Do not enable TSI module until all other settings are in place!
TSI0_GENCS |= TSI_GENCS_TSIEN_MASK; // włączenie modułu TSI, zeby zmienic powyzsze opcje nalezy wylaczyc modul,zmienic ustawienia i z powrotem wlaczyc TSI
CalibrateTSI();
} // End InitTSI()
void CalibrateTSI(void)
{
TSI0_GENCS |= TSI_GENCS_EOSF_MASK; // Clear end of scan flag
// Scan first electrode (TSI9)
TSI0_DATA |=TSI_DATA_TSICH(9);
TSI0_DATA |= TSI_DATA_SWTS_MASK; // Request scan
while(!(TSI0_GENCS &= TSI_GENCS_EOSF_MASK)); // poczekaj az skanowanie dobiegnie konca-> EOSF=1
TSI0_GENCS |= TSI_GENCS_EOSF_MASK; // zeruj flage zakonczenia skanowania -> wpisz 1 do EOSF
kalibracja[0] = (TSI0_DATA &=TSI_DATA_TSICNT_MASK); // zapisz wynik skanowania pierwszej elektrody do tablicy
// Scan second electrode (TSI10)
TSI0_DATA |=TSI_DATA_TSICH(10);
TSI0_DATA |= TSI_DATA_SWTS_MASK; // Request scan
while(!(TSI0_GENCS &= TSI_GENCS_EOSF_MASK)); // Spin until done
TSI0_GENCS |= TSI_GENCS_EOSF_MASK; // Clear end of scan flag
kalibracja[1] = (TSI0_DATA &= TSI_DATA_TSICNT_MASK);
TSI0_DATA |=TSI_DATA_TSICH(9); // Select electrode to scan
currentElectrode = 0; // Set flag for first electrode
}
