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| interfaces:amba [2014/12/23 07:54] – darron | interfaces:amba [2022/07/29 01:23] (current) – [Resources] darron | ||
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| - | ==== ARM Amba ==== | + | ==== ARM Amba UART ==== |
| <wrap right> | <wrap right> | ||
| {{: | {{: | ||
| </ | </ | ||
| - | ARM Amba UARTs are found on ARM systems such as the Raspberry Pi. | + | These UARTs are found on systems such as the Raspberry Pi. |
| - | == Files at ARM == | + | === RPi === |
| - | [[http:// | + | |
| - | == Files at RPi == | + | The following guide is very old now and has mostly become obsolete. |
| - | [[http:// | + | |
| - | ==== RPi ==== | + | By default, the UART is used as the Linux console, this must be disabled to allow general purpose operation. |
| - | High speed modes of operation are not enabled by default and must be enabled in /boot. | + | The following script run as root can solve this. |
| + | < | ||
| + | #!/bin/sh | ||
| + | C=`awk '{ for (i = 1; i <= NF; ++i) { if ($i !~ /ttyAMA0/) { printf $i" " } } printf " | ||
| + | echo $C > / | ||
| + | sed -i ' | ||
| + | </ | ||
| - | == / | + | High speed modes of operation are also not enabled by default and these should be enabled. |
| < | < | ||
| - | init_uart_clock=64000000 | + | echo "init_uart_clock=64000000" >> / |
| </ | </ | ||
| + | |||
| + | Reboot the RPi to apply all the settings. | ||
| + | |||
| + | ===RPi 3=== | ||
| + | |||
| + | The RPi 3 uses the UART for comms with the the built-in bluetooth module and presents a simple " | ||
| + | |||
| + | To swap the ports around to gain access to the faster port, do the following in config.txt | ||
| + | |||
| + | < | ||
| + | dtoverlay=pi3-miniuart-bt | ||
| + | </ | ||
| + | === Resources === | ||
| + | |||
| + | [[http:// | ||
| + | |||
| + | [[http:// | ||
| + | |||
| + | |||
