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pn53x: factorize timer code

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This commit is contained in:
Philippe Teuwen
2011-04-04 19:04:43 +00:00
parent 11668f1143
commit ffe2714b28
6 changed files with 70 additions and 100 deletions
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18
libnfc/drivers/pn53x_usb.c
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@@ -288,27 +288,19 @@ pn53x_usb_connect (const nfc_device_desc_t *pndd)
CHIP_DATA (pnd)->io = &pn53x_usb_io;
switch (DRIVER_DATA (pnd)->model) {
// empirical tuning
case ASK_LOGO:
// Timer stops only after 5 bits are received => 5*128 cycles
// When sent ...ZY (cmd ends with logical 0):
// 50: empirical tuning
CHIP_DATA (pnd)->timer_correction_zy = 50 - (5 * 128);
// When sent ...YY (cmd ends with logical 1):
// a ...ZY signal finishes 64us later than a ...YY signal
CHIP_DATA (pnd)->timer_correction_yy = CHIP_DATA (pnd)->timer_correction_zy + 64;
CHIP_DATA (pnd)->timer_correction = 50;
break;
case SCM_SCL3711:
case NXP_PN533:
CHIP_DATA (pnd)->timer_correction_zy = 46 - (5 * 128);
CHIP_DATA (pnd)->timer_correction_yy = CHIP_DATA (pnd)->timer_correction_zy + 64;
CHIP_DATA (pnd)->timer_correction = 46;
break;
case NXP_PN531:
CHIP_DATA (pnd)->timer_correction_zy = 50 - (2 * 128);
CHIP_DATA (pnd)->timer_correction_yy = CHIP_DATA (pnd)->timer_correction_zy + 64;
CHIP_DATA (pnd)->timer_correction = 50;
break;
case SONY_PN531:
CHIP_DATA (pnd)->timer_correction_zy = 54 - (2 * 128);
CHIP_DATA (pnd)->timer_correction_yy = CHIP_DATA (pnd)->timer_correction_zy + 64;
CHIP_DATA (pnd)->timer_correction = 54;
break;
default:
break;