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Fix bug display lib: random characters flickering

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Fix bug in display library where random chars were written to display even
though the array has ended.
Resulting in random character appearing briefly when only first display got written.

-> stop loop when 0-termination of char array is reached
This commit is contained in:
jonny_ji7 2022-08-22 22:22:45 +02:00
parent 4e2cc070d1
commit 9f329101a1
1 changed files with 1 additions and 1 deletions
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2
components/max7219/max7219.c
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@ -236,7 +236,7 @@ esp_err_t max7219_draw_text_7seg(max7219_t *dev, uint8_t pos, const char *s)
{ {
CHECK_ARG(dev && s); CHECK_ARG(dev && s);
while (s && pos < dev->digits) while (*s != '\0' && pos < dev->digits)
{ {
uint8_t c = get_char(dev, *s); uint8_t c = get_char(dev, *s);
if (*(s + 1) == '.') if (*(s + 1) == '.')