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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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en:c1_hardware_uart [2016/11/14 17:04] charles.park |
en:c1_hardware_uart [2016/11/14 17:19] (current) odroid [How to use enable another UART /dev/ttyS1 on 40 Pin Header] |
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| Send characters via minicom. | Send characters via minicom. | ||
| - | === How to use UART(/dev/ttyS1) on 40 Pin Header === | + | ==== How to enable another UART /dev/ttyS1 on 40 Pin Header ==== |
| - | == Pin Map : GPIOX.4[29, TXD], GPIOX.5[18, RXD] == | + | === Pin Map : GPIOX.4[29, TXD], GPIOX.5[18, RXD] === |
| - | 1. Need package install | + | <WRAP center round important 100%> |
| + | To use the UART(/dev/ttyS1), you first need to update the kernel version to "3.10.104" or higher. | ||
| + | sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade | ||
| + | </WRAP> | ||
| + | |||
| + | 1. Install the device-tree compiler package | ||
| <code> | <code> | ||
| sudo apt-get install device-tree-compiler | sudo apt-get install device-tree-compiler | ||
| </code> | </code> | ||
| - | 2. Download dts file from github. | + | 2. Download dts file from our github. |
| <code> | <code> | ||
| wget https://github.com/hardkernel/linux/raw/odroidc-3.10.y/arch/arm/boot/dts/meson8b_odroidc.dts | wget https://github.com/hardkernel/linux/raw/odroidc-3.10.y/arch/arm/boot/dts/meson8b_odroidc.dts | ||
| Line 62: | Line 67: | ||
| </code> | </code> | ||
| - | 4. find uart_ao & edit | + | 4. find uart_ao & add uart_0 definition. |
| <code> | <code> | ||
| ... | ... | ||
| Line 96: | Line 101: | ||
| </code> | </code> | ||
| - | 5. find pinmux & edit | + | 5. find pinmux & add uart_0 pin mux. |
| <code> | <code> | ||
| ... | ... | ||
| Line 135: | Line 140: | ||
| </code> | </code> | ||
| - | === Pin Map : UART pin on the 4-pin CON5 connector === | + | ==== Pin Map : UART pin on the 4-pin CON5 connector ==== |
| <code> | <code> | ||
| _____UART____ | _____UART____ | ||
| Line 148: | Line 153: | ||
| 3.3V LVTTL | 3.3V LVTTL | ||
| - | === Automatically configure the UART settings. === | + | ==== Automatically configure the UART settings. ==== |
| This is an example of default setting for a GPS module which has a 9600bpsN81 UART interface.\\ | This is an example of default setting for a GPS module which has a 9600bpsN81 UART interface.\\ | ||
| Add the following to the end of /etc/rc.local (before the exit 0)\\ | Add the following to the end of /etc/rc.local (before the exit 0)\\ | ||
| Line 154: | Line 159: | ||
| This way the tty port is setup for use with the gps on system boot, without user interaction.\\ | This way the tty port is setup for use with the gps on system boot, without user interaction.\\ | ||
| \\ | \\ | ||
| - | === Tips for UART port === | + | ==== Tips for UART port ==== |
| [[http://forum.odroid.com/viewtopic.php?f=115&t=17279|How to enable the RTS/CTS]] | [[http://forum.odroid.com/viewtopic.php?f=115&t=17279|How to enable the RTS/CTS]] | ||
