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LPC11U35 uart Unable to receive data

Question asked by chen xin on Oct 20, 2019
Latest reply on Oct 21, 2019 by Alice_Yang

Currently, pio1 ﹣ 26 and pio1 ﹣ 27 are used as RXD and TXD. At present, the data can be sent to the computer normally, but the data sent by the computer to the MCU cannot be received by the MCU normally, or even will not enter the UART? Irqhandler.How to solve this problem?

 The reference code used is