scottp
dbed9bbc88
samples/shell is `rb9704` on the shell with callbacks that print what arrives, a CRC-32 and the start of each message from the network. Board overlays for native_sim (the modem a host serial port, a pty or a real 9704 on USB), NUCLEO-U575ZI-Q, XIAO ESP32S3 and ESP32-S3-DevKitC. tests/rig/bridge copies bytes between a board's USB serial port and a UART, so two boards wired together stand in for a USB-serial adapter: one runs the sample, the other bridges its modem UART to the host, where the fake modem answers. Overlays for a Nucleo and a XIAO, either way round.
34 lines
625 B
Plaintext
34 lines
625 B
Plaintext
/* host: the native USB serial port. target: uart1 on D8 (GPIO7, TX) and D9
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* (GPIO8, RX), wired to the other board's modem UART. 230400, the modem's
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* rate; the USB side has none. */
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/ {
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aliases {
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bridge-host = &usb_serial;
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bridge-target = &uart1;
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};
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};
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&spi2 {
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status = "disabled"; /* the board puts it on GPIO7 to 9 */
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};
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&pinctrl {
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uart1_bridge: uart1_bridge {
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group1 {
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pinmux = <UART1_TX_GPIO7>;
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output-high;
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};
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group2 {
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pinmux = <UART1_RX_GPIO8>;
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bias-pull-up;
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};
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};
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};
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&uart1 {
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pinctrl-0 = <&uart1_bridge>;
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pinctrl-names = "default";
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current-speed = <230400>;
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status = "okay";
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};
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