mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-11-14 00:56:35 +00:00
36 lines
No EOL
827 B
C
36 lines
No EOL
827 B
C
#include "uart.h"
|
|
|
|
void uart_initialize(uint16_t divider) {
|
|
/* Setup UART in 16450 mode. We assume the relevant UART clock has been enabled. */
|
|
|
|
/* Disable FIFO */
|
|
UART_IIR_FCR_0 = 0x00;
|
|
|
|
/* Set DLAB */
|
|
UART_LCR_0 = 0x80;
|
|
UART_THR_DLAB_0_0 = (uint8_t)divider;
|
|
UART_IER_DLAB_0_0 = (uint8_t)(divider >> 8);
|
|
|
|
/* 8N1 mode */
|
|
UART_LCR_0 = 0x03;
|
|
}
|
|
|
|
void uart_transmit_char(char ch) {
|
|
/* Wait for THR to be empty */
|
|
while (!(UART_LSR_0 & 0x20)) {}
|
|
|
|
UART_THR_DLAB_0_0 = ch;
|
|
}
|
|
|
|
void uart_transmit_str(const char *str) {
|
|
while (*str) {
|
|
uart_transmit_char(*str++);
|
|
}
|
|
}
|
|
|
|
void uart_transmit_hex(uint32_t value) {
|
|
for (unsigned int i = 0; i < 8; i++) {
|
|
uint32_t nibble = (value >> (28 - i * 4)) & 0xF;
|
|
uart_transmit_char("0123456789ABCDEF"[nibble]);
|
|
}
|
|
} |