RC663通信速率如何更改？

[370188629]

关于RC663如何改变通信速率？例如从106k改变到424K?我使用官方库，修改uint16_t PH_MEMLOC_CONST_ROM wRc663_DefaultShadow_I14443a[][2]，

static const uint16_t PH_MEMLOC_CONST_ROM wRc663_DefaultShadow_I14443a[][2] =
{
{PHHAL_HW_CONFIG_PARITY, PH_ON},
{PHHAL_HW_CONFIG_TXCRC, PH_OFF},
{PHHAL_HW_CONFIG_RXCRC, PH_OFF},
{PHHAL_HW_CONFIG_RXDEAFBITS, 0x0008},
{PHHAL_HW_CONFIG_TXWAIT_US, 81},
{PHHAL_HW_CONFIG_TXDATARATE, PHHAL_HW_RF_DATARATE_106},
{PHHAL_HW_CONFIG_RXDATARATE, PHHAL_HW_RF_DATARATE_106},
{PHHAL_HW_CONFIG_TIMEOUT_VALUE_US, PHHAL_HW_RC663_DEFAULT_TIMEOUT},
{PHHAL_HW_CONFIG_TIMEOUT_VALUE_MS, 0x0000},
{PHHAL_HW_CONFIG_ASK100, PH_ON}
};

static const uint16_t PH_MEMLOC_CONST_ROM wRc663_DefaultShadow_I14443a[][2] =
{
{PHHAL_HW_CONFIG_PARITY, PH_ON},
{PHHAL_HW_CONFIG_TXCRC, PH_OFF},
{PHHAL_HW_CONFIG_RXCRC, PH_OFF},
{PHHAL_HW_CONFIG_RXDEAFBITS, 0x0008},
{PHHAL_HW_CONFIG_TXWAIT_US, 81},
{PHHAL_HW_CONFIG_TXDATARATE, PHHAL_HW_RF_DATARATE_424},
{PHHAL_HW_CONFIG_RXDATARATE, PHHAL_HW_RF_DATARATE_424},
{PHHAL_HW_CONFIG_TIMEOUT_VALUE_US, PHHAL_HW_RC663_DEFAULT_TIMEOUT},
{PHHAL_HW_CONFIG_TIMEOUT_VALUE_MS, 0x0000},
{PHHAL_HW_CONFIG_ASK100, PH_ON}
};

改变中间106k为424k，编译运行程序，发现原来的卡片（通信速率为106k）,在新的程序中依然可以识别到卡？

请问，怎么修改通信速率？

如何查询芯片是使用的哪种通信速率??

谢谢？？？

[Kan_Li]

Hi Li Jie,

There is  no need to change the data rate manually like this, the NFC reader library automatically switches to a higher rate supported by the card during the hand shake, and I guess your card is a ISO14443A type card, right? Please also note for ISO14443A card, the hand shake always starts at 106Kbps, so it is impossible to switch the reader to a higher rate then start to communicate with the card. Please kindly refer to the ISO14443 spec for more details.

Hope that helps,

Have a great day,
Kan

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