In the first part of infrared serial communication of LPC900 series microcontroller (hereinafter referred to as the first part), we took LPC932A1 as an example to discuss the method of using the CCU module and UART in the LP C932A1 chip to realize master-slave infrared communication. In practice, there is often such an application, that is, using a data collector to collect various data on site and then upload the data to the PC (personal computer). In this application, the data collector and the site usually communicate in a two-way manner, while the data collector and the PC communicate in a one-way manner, that is, the one-way upload channel from the collector to the PC. The traditional communication method is mostly based on the RS232 interface. Some industrial sites also use the RS422/RS485 standard interface, but the connection is troublesome and the operation is inconvenient. Now we try to use infrared communication to greatly improve the convenience of data collection and uploading. The communication between the data collector and the site can adopt the master-slave two-way infrared communication introduced in the first part. I will not repeat it here. Now I still take the LP C932A1 as an example to talk about the one-way infrared serial communication between the collector and the PC
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