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Calibrate PN532_UART and ARYGON drivers.

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This commit is contained in:
Romuald Conty 2011-04-04 15:20:33 +00:00
parent 93de7fcd5c
commit 601081d50a
2 changed files with 4 additions and 6 deletions
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5
libnfc/drivers/arygon.c
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@ -177,9 +177,8 @@ arygon_connect (const nfc_device_desc_t * pndd)
CHIP_DATA (pnd)->io = &arygon_tama_io; CHIP_DATA (pnd)->io = &arygon_tama_io;
// Timer stops only after 5 bits are received => 5*128 cycles // Timer stops only after 5 bits are received => 5*128 cycles
// When sent ...ZY (cmd ends with logical 0): // When sent ...ZY (cmd ends with logical 0):
// TODO: calibration // 46: empirical tuning
// 50: empirical tuning CHIP_DATA (pnd)->timer_correction_zy = 46 - (5 * 128);
CHIP_DATA (pnd)->timer_correction_zy = 50 - (5 * 128);
// When sent ...YY (cmd ends with logical 1): // When sent ...YY (cmd ends with logical 1):
// a ...ZY signal finishes 64us later than a ...YY signal // 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_yy = CHIP_DATA (pnd)->timer_correction_zy + 64;

5
libnfc/drivers/pn532_uart.c
View file

@ -162,9 +162,8 @@ pn532_uart_connect (const nfc_device_desc_t * pndd)
CHIP_DATA(pnd)->io = &pn532_uart_io; CHIP_DATA(pnd)->io = &pn532_uart_io;
// Timer stops only after 5 bits are received => 5*128 cycles // Timer stops only after 5 bits are received => 5*128 cycles
// When sent ...ZY (cmd ends with logical 0): // When sent ...ZY (cmd ends with logical 0):
// TODO: calibration // 48: empirical tuning
// 50: empirical tuning CHIP_DATA (pnd)->timer_correction_zy = 48 - (5 * 128);
CHIP_DATA (pnd)->timer_correction_zy = 50 - (5 * 128);
// When sent ...YY (cmd ends with logical 1): // When sent ...YY (cmd ends with logical 1):
// a ...ZY signal finishes 64us later than a ...YY signal // 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_yy = CHIP_DATA (pnd)->timer_correction_zy + 64;