9 bit dma uart RS485

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9 bit dma uart RS485

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albertomainoni
Contributor I

Please, how can I get and send ninth bit with DMA and UART?

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Hui_Ma
NXP TechSupport
NXP TechSupport

Hi,

It will be better to use software to set/read UARTx_C3 [T8] about 9-bit UART transmit/receive.

Even if using the DMA engineer, it also need core intervene to write/read the ninth data bit with UARTx_C3 [T8] bit.

Wish it helps.

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Hui_Ma
NXP TechSupport
NXP TechSupport

Hi,

It will be better to use software to set/read UARTx_C3 [T8] about 9-bit UART transmit/receive.

Even if using the DMA engineer, it also need core intervene to write/read the ninth data bit with UARTx_C3 [T8] bit.

Wish it helps.

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