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samples: console: echo: Test output-only mode too

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We have cases with UART drivers where TX interrupt handling is not
bootstrapped properly on enabling them. To make such cases more
obvious, start this sample with console_write(), the output of which
wouldn't appear if that's the case. (Of course, the sample starts
with printk() exlaining what may happpen.)

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
This commit is contained in:
Paul Sokolovsky 2018-11-13 15:20:02 +03:00 • committed by Kumar Gala
commit 325954de8f
1 changed files with 5 additions and 1 deletions
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6
samples/subsys/console/echo/src/main.c
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@ -6,11 +6,15 @@
#include <zephyr.h> #include <zephyr.h>
#include <console.h> #include <console.h>
static const char prompt[] = "Start typing characters to see them echoed back\n";
void main(void) void main(void)
{ {
console_init(); console_init();
printk("Start typing characters to see them echoed back\n"); printk("You should see another line with instructions below. If not,\n");
printk("the (interrupt-driven) console device doesn't work as expected:\n");
console_write(NULL, prompt, sizeof(prompt) - 1);
while (1) { while (1) {
u8_t c = console_getchar(); u8_t c = console_getchar();