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/* -------------------------------------------
Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
#include <lib/boot.h>
#include <lib/string.h>
/// BUGS: 0
/* this file handles the UART */
static uint8_t* cb_uart_ptr = (uint8_t*) NB_UART_BASE;
utf_char_t cb_get_char(void) {
uintptr_t ptr = NB_UART_BASE;
while (!(*(((volatile uint8_t*) ptr) + 0x05) & 0x01))
;
return (utf_char_t) *cb_uart_ptr;
}
// we need that one, to avoid sending mutliple chars to UART.
static boolean cb_locked_put_char = no;
void cb_put_char(utf_char_t ch) {
int32_t timeout = 0;
while (cb_locked_put_char) {
++timeout;
if (timeout > 1000000) break;
}
cb_locked_put_char = yes;
*cb_uart_ptr = ch;
cb_locked_put_char = no;
}
/// @brief UART put string
/// @param text the input text.
size_t cb_put_string(const char* text) {
if (text == nil) return 0;
size_t i = 0;
for (; i < strlen(text); i++) {
cb_put_char(text[i]);
}
return i;
}
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