2021-05-14 13:00:57 +00:00
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#include <stdint.h>
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#include "../include/uart.h"
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#include "../include/xprintf.h"
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// send one char to uart
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void uart_putc(uint8_t c)
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{
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while (UART0_REG(UART0_STATUS) & 0x1);
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UART0_REG(UART0_TXDATA) = c;
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}
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// Block, get one char from uart.
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uint8_t uart_getc()
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{
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UART0_REG(UART0_STATUS) &= ~0x2;
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while (!(UART0_REG(UART0_STATUS) & 0x2));
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return (UART0_REG(UART0_RXDATA) & 0xff);
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}
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// 115200bps, 8 N 1
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void uart_init()
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{
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// enable tx and rx
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UART0_REG(UART0_CTRL) = 0x3;
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xdev_out(uart_putc);
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}
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