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