Simple C class example using serial port, USB, wirelessThis post is part of the Practical C programming tutorial for Bioloid. Here you can find a post serie about using serial port communications with CC and C, for Windows, Linux and microcontrollers. This code is for Windows and Visual Studio and can be used for serial cable communications, USB2. Dynamixel and indeed Zigbee Header. Serial. Port. HANDLE serial. Port. Handle. int connect. Name, int baud. Rate, Serial. Parity parity. void disconnectvoid. Arrayunsigned char buffer, int len. Using Serial Port On Raspberry Pi' title='Using Serial Port On Raspberry Pi' />Array unsigned char uffer, int len. Serial. Port Serial. Port. serial. 
Raspberry Pi and the Serial Port. By default the Raspberry Pis serial port is configured to be used for console inputoutput. Whilst this is useful if you want to. The following tables give the mapping of the Raspberry Pi GPIO Pins to the GPIO connector in relation to the pin numbers and the physical location on the connector. Raspberry Pi unit Serial port in your PC or USB to serial adapter MAX3232CPE or similar RS232 to 3. V logic level transceiver 5 x 0. F capacitors I used. Port. Handle INVALIDHANDLEVALUE. Serial. Port Serial. Port. if serial. Port. HandleINVALIDHANDLEVALUE. Close. Handleserial. Port. Handle. serial. Renato Zero Puro Spirito. Port. Handle INVALIDHANDLEVALUE. Serial. Port connect. LCOM1. int Serial. Port connect wchartdevice. DCBlength sizeofdcb. Using Serial Port On Raspberry Pi' title='Using Serial Port On Raspberry Pi' />Baud. Rate 5. 76. Parity NOPARITY. Parity 0. dcb. Stop. Bits ONESTOPBIT. Byte. Size 8. serial. Port. Handle Create. Filedevice, GENERICREAD GENERICWRITE, 0, NULL, OPENEXISTING, NULL, NULL. Port. Handle INVALIDHANDLEVALUE. Set. Comm. Stateserial. RPi-gpio-serial.jpg' alt='Using Serial Port On Raspberry Pi' title='Using Serial Port On Raspberry Pi' />Port. Handle, dcb. Serial. Port disconnectvoid. Close. Handleserial. Port. Handle. serial. Port. Handle INVALIDHANDLEVALUE. Port 1 has been CLOSED and d is the file descriptionn, file. Descriptor. int Serial. Port send. Arrayunsigned char uffer, int len. Port. HandleINVALIDHANDLEVALUE. Write. Fileserial. Port. Handle, buffer, len, result, NULL. Serial. Port get. Array unsigned char uffer, int len. Port. HandleINVALIDHANDLEVALUE. Read. Fileserial. Port. Handle, buffer, len, readnbr, NULL. Serial. Port clear. Purge. Comm serial. Port. Handle, PURGERXCLEAR PURGETXCLEAR. Series Navigationlt lt I Programming serial port communications. Raspberry Pi and the Serial Port. Raspberry Pi and the Serial Port. By default the Raspberry Pis serial port is configured to be used for console inputoutput. Whilst this is useful if you want to login using the serial port, it means you cant use the Serial Port in your programs. To be able to use the serial port to connect and talk to other devices e. Arduino, the serial port console login needs to be disabled. Needless to say you will need some other way to login to the Raspberry Pi, and we suggest doing this over the network using an SSH connection. Disable Serial Port Login. To enable the serial port for your own use you need to disable login on the port. There are two files that need to be edited. The first and main one is etcinittab. This file has the command to enable the login prompt and this needs to be disabled. Edit the file and move to the end of the file. You will see a line similar to. T0 2. 3 respawn sbingetty L tty. AMA0 1. 15. 20. 0 vt. Disable it by adding a character to the beginning. Save the file. T0 2. L tty. AMA0 1. 15. Disable Bootup Info. When the Raspberry Pi boots up, all the bootup information is sent to the serial port. Disabling this bootup information is optional and you may want to leave this enabled as it is sometimes useful to see what is happening at bootup. If you have a device connected i. Arduino at bootup, it will receive this information over the serial port, so it is up to you to decide whether this is a problem or not. You can disable it by editing the file bootcmdline. The contents of the file look like thisdwcotg. AMA0,1. 15. 20. 0 kgdboctty. AMA0,1. 15. 20. 0 consoletty. Remove all references to tty. AMA0 which is the name of the serial port. The file will now look like thisdwcotg. Reboot. In order you enable the changes you have made, you will need to reboot the Raspberry Pisudo shutdown r now. Test the Serial Port. A great way to test out the serial port is to use the minicom program. If you dont have this installed runsudo apt get install minicom. Connect your PC to the Raspberry Pi serial port using an appropriate serial port adapter and wiring, then open Putty or a similar serial terminal program on PC side. Setup a connection using the serial port at 9. Now run up minicom on the Raspberry Pi usingminicom b 9. D devtty. AMA0. What you type into the minicom terminal screen should appear on the serial PC terminal and vice versa.