Difference between revisions of "DESK-MX9-L/Peripherals/UART"
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! colspan="4" style="width:100%; text-align:left" ; border-bottom:solid 2px #ededed" |History | ! colspan="4" style="width:100%; text-align:left" ; border-bottom:solid 2px #ededed" |History | ||
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| − | ! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:# | + | !style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Issue Date |
| − | + | !style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white"|Notes | |
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| + | | style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |2024/01/30 | ||
| + | | style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |DESK-MX9-L-5.0.0 release | ||
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<section end="History" /> | <section end="History" /> | ||
| + | __FORCETOC__ | ||
<section begin="Body" /> | <section begin="Body" /> | ||
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=== Device tree configuration === | === Device tree configuration === | ||
| − | + | Here below is an example of device tree modifications to standard DAVE's kit for the AURA SOM: | |
| − | |||
| − | Here below an example of device tree modifications to standard DAVE's kit for the AURA SOM: | ||
From <code>imx93-aura-cb2001.dts</code>: | From <code>imx93-aura-cb2001.dts</code>: | ||
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</pre> | </pre> | ||
| − | ===Accessing the peripheral | + | ===Accessing the peripheral=== |
====Linux messages at boot time==== | ====Linux messages at boot time==== | ||
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'''N.B.''' UART mapping respect to <code>ttyLPX</code> is the following one: | '''N.B.''' UART mapping respect to <code>ttyLPX</code> is the following one: | ||
| − | LPUART1 | + | LPUART1 <-> ttyLP0 |
| − | LPUART2 | + | LPUART2 <-> ttyLP1 |
| − | LPUART3 | + | LPUART3 <-> ttyLP2 |
| − | LPUART4 | + | LPUART4 <-> ttyLP3 |
... | ... | ||
| Line 79: | Line 81: | ||
For detailed information, please refer to the Serial Programming HOWTO at [http://tldp.org/HOWTO/Serial-Programming-HOWTO/index.html Serial-Programming-HOWTO] | For detailed information, please refer to the Serial Programming HOWTO at [http://tldp.org/HOWTO/Serial-Programming-HOWTO/index.html Serial-Programming-HOWTO] | ||
| − | + | <section end="Body" /> | |
| − | [[Category: | + | [[Category:AURA]] |
| − | |||
Latest revision as of 09:34, 1 February 2024
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| Issue Date | Notes | ||
| 2024/01/30 | DESK-MX9-L-5.0.0 release | ||
Contents
Peripheral UART[edit | edit source]
Device tree configuration[edit | edit source]
Here below is an example of device tree modifications to standard DAVE's kit for the AURA SOM:
From imx93-aura-cb2001.dts:
...
...
&lpuart4 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart4>;
status = "okay";
};
...
&iomuxc {
...
pinctrl_uart4: uart4grp{
fsl,pins = <
MX93_PAD_GPIO_IO14__LPUART4_TX 0x31e
MX93_PAD_GPIO_IO15__LPUART4_RX 0x31e
>;
};
...
Accessing the peripheral[edit | edit source]
Linux messages at boot time[edit | edit source]
... [ 0.847346] 44380000.serial: ttyLP0 at MMIO 0x44380010 (irq = 18, base_baud = 1500000) is a FSL_LPUART [ 0.856702] printk: console [ttyLP0] enabled [ 0.875438] 44390000.serial: ttyLP1 at MMIO 0x44390010 (irq = 19, base_baud = 1500000) is a FSL_LPUART [ 0.885307] 42580000.serial: ttyLP3 at MMIO 0x42580010 (irq = 20, base_baud = 1500000) is a FSL_LPUART [ 0.895137] 42690000.serial: ttyLP2 at MMIO 0x42690010 (irq = 21, base_baud = 1500000) is a FSL_LPUART ...
Usage with stty[edit | edit source]
N.B. UART mapping respect to ttyLPX is the following one:
LPUART1 <-> ttyLP0 LPUART2 <-> ttyLP1 LPUART3 <-> ttyLP2 LPUART4 <-> ttyLP3 ...
root@desk-mx93:~# stty -F /dev/ttyLP1 115200 -echo -raw root@desk-mx93:~# cat /dev/ttyLP1 > test_ttyLP1.log & [1] 716 root@desk-mx93:~# echo "Test loopback" > /dev/ttyLP1 root@desk-mx93:~# cat test_ttyLP1.log Test loopback root@desk-mx93:~#
Additional information[edit | edit source]
Serial ports can be used through the standard serial programming API.
For detailed information, please refer to the Serial Programming HOWTO at Serial-Programming-HOWTO
