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am-tests,keyboard: fix comparison of char

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* The sign of char is implemention-defined. char is unsigned in RISC-V.
This commit is contained in:
Zihao Yu 2024-01-10 23:48:00 +08:00
parent 7bb7b1a94f
commit 33c0dd0d85
1 changed files with 1 additions and 1 deletions
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2
tests/am-tests/src/tests/keyboard.c
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@ -11,7 +11,7 @@ static void drain_keys() {
if (has_uart) { if (has_uart) {
while (1) { while (1) {
char ch = io_read(AM_UART_RX).data; char ch = io_read(AM_UART_RX).data;
if (ch == -1) break; if (ch == (char)-1) break;
printf("Got (uart): %c (%d)\n", ch, ch & 0xff); printf("Got (uart): %c (%d)\n", ch, ch & 0xff);
} }
} }