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pn53x drivers: fix timer corrections location

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This commit is contained in:
Philippe Teuwen 2011-04-04 15:07:39 +00:00
parent fb398c387f
commit 93de7fcd5c
2 changed files with 16 additions and 16 deletions
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16
libnfc/drivers/arygon.c
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@ -115,14 +115,6 @@ arygon_probe (nfc_device_desc_t pnddDevices[], size_t szDevices, size_t * pszDev
CHIP_DATA (pnd)->type = PN532;
CHIP_DATA (pnd)->state = NORMAL;
CHIP_DATA (pnd)->io = &arygon_tama_io;
// Timer stops only after 5 bits are received => 5*128 cycles
// When sent ...ZY (cmd ends with logical 0):
// TODO: calibration
// 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;
bool res = arygon_reset_tama (pnd);
nfc_device_free (pnd);
@ -183,6 +175,14 @@ arygon_connect (const nfc_device_desc_t * pndd)
// The PN53x chip connected to ARYGON MCU doesn't seems to be in SLEEP mode
CHIP_DATA (pnd)->state = NORMAL;
CHIP_DATA (pnd)->io = &arygon_tama_io;
// Timer stops only after 5 bits are received => 5*128 cycles
// When sent ...ZY (cmd ends with logical 0):
// TODO: calibration
// 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;
pnd->driver = &arygon_driver;
// Check communication using "Reset TAMA" command

16
libnfc/drivers/pn532_uart.c
View file

@ -96,14 +96,6 @@ pn532_uart_probe (nfc_device_desc_t pnddDevices[], size_t szDevices, size_t * ps
CHIP_DATA (pnd)->type = PN532;
CHIP_DATA (pnd)->state = SLEEP;
CHIP_DATA (pnd)->io = &pn532_uart_io;
// Timer stops only after 5 bits are received => 5*128 cycles
// When sent ...ZY (cmd ends with logical 0):
// TODO: calibration
// 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;
// Check communication using "Diagnose" command, with "Communication test" (0x00)
bool res = pn53x_check_communication (pnd);
@ -168,6 +160,14 @@ pn532_uart_connect (const nfc_device_desc_t * pndd)
CHIP_DATA(pnd)->type = PN532;
CHIP_DATA(pnd)->state = SLEEP;
CHIP_DATA(pnd)->io = &pn532_uart_io;
// Timer stops only after 5 bits are received => 5*128 cycles
// When sent ...ZY (cmd ends with logical 0):
// TODO: calibration
// 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;
pnd->driver = &pn532_uart_driver;
// Check communication using "Diagnose" command, with "Communication test" (0x00)