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driver: serial: uart_shell: Add read command

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This command waits for a given time (in seconds) and will continuously
poll from the UART device and print on the Shell console. This command
can be used to also test the RX line.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
This commit is contained in:
Daniel Schultz 2025-06-11 13:06:32 +02:00 • committed by Benjamin Cabé
commit e1db87e515
1 changed files with 53 additions and 2 deletions
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55
drivers/serial/uart_shell.c
View file

@ -36,13 +36,56 @@ static int cmd_uart_write(const struct shell *sh, size_t argc, char **argv)
return 0;
}
static int cmd_uart_read(const struct shell *sh, size_t argc, char **argv)
{
char *s_dev_name = argv[1];
const struct device *dev = shell_device_get_binding(s_dev_name);
int ret = 0;
char chr;
k_timepoint_t end;
uint64_t seconds;
if (!dev || !device_is_uart(dev)) {
shell_error(sh, "UART: Device driver %s not found.", s_dev_name);
return -ENODEV;
}
seconds = shell_strtoul(argv[2], 10, &ret);
if (ret != 0) {
shell_help(sh);
return SHELL_CMD_HELP_PRINTED;
}
if (seconds < 1) {
return -EINVAL;
}
shell_info(sh, "UART: Read for %lli seconds from %s.", seconds, s_dev_name);
end = sys_timepoint_calc(K_SECONDS(seconds));
while (!sys_timepoint_expired(end)) {
ret = uart_poll_in(dev, &chr);
if (ret == 0) {
shell_fprintf_normal(sh, "%c", chr);
}
if (ret != 0 && ret != -1) {
shell_error(sh, "Failed to read from UART (%d)", ret);
break;
}
}
shell_fprintf_normal(sh, "\n");
return ret;
}
static int cmd_uart_baudrate(const struct shell *sh, size_t argc, char **argv)
{
char *s_dev_name = argv[1];
const struct device *dev;
struct uart_config cfg;
uint32_t baudrate;
int ret;
int ret = 0;
dev = shell_device_get_binding(s_dev_name);
if (!dev || !device_is_uart(dev)) {
@ -50,7 +93,11 @@ static int cmd_uart_baudrate(const struct shell *sh, size_t argc, char **argv)
return -ENODEV;
}
baudrate = strtol(argv[2], NULL, 10);
baudrate = shell_strtoul(argv[2], 10, &ret);
if (ret != 0) {
shell_help(sh);
return SHELL_CMD_HELP_PRINTED;
}
ret = uart_config_get(dev, &cfg);
if (ret < 0) {
shell_error(sh, "UART: Failed to get current configuration: %d", ret);
@ -126,6 +173,10 @@ SHELL_STATIC_SUBCMD_SET_CREATE(sub_uart_cmds,
"Write data to the UART device\n"
"Usage: write <device> <data>",
cmd_uart_write, 3, 0),
SHELL_CMD_ARG(read, &dsub_device_name,
"read data from the UART device\n"
"Usage: read <device> <duration in secs>",
cmd_uart_read, 3, 0),
SHELL_CMD_ARG(baudrate, &dsub_device_name,
"Configure UART device baudrate\n"
"Usage: baudrate <device> <baudrate>",