mirror of
https://github.com/sigmasternchen/chaOS
synced 2025-03-15 05:38:54 +00:00
72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
#include "serial.h"
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void initSerial(enum Baudrate baudrate, enum Databits data, enum Parity parity, enum Stopbits stop) {
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switch (baudrate) {
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case b2400:
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UBRRL = 416 & 0xff;
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UBRRH = 416 >> 8;
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break;
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case b4800:
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UBRRL = 207 & 0xff;
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UBRRH = 207 >> 8;
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break;
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case b9600:
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UBRRL = 103 & 0xff;
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UBRRH = 103 >> 8;
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break;
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case b19200:
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UBRRL = 51 & 0xff;
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UBRRH = 51 >> 8;
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break;
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case b38400:
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UBRRL = 25 & 0xff;
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UBRRH = 25 >> 8;
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break;
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case b57600:
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UBRRL = 16 & 0xff;
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UBRRH = 16 >> 8;
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break;
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case b155200:
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UBRRL = 8 & 0xff;
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UBRRH = 8 >> 8;
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break;
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default:
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break;
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}
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UCSRC &= ~((0 << URSEL) | (1 << USBS));
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if (stop == s2)
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UCSRC |= (1 << URSEL) | (1 << USBS);
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UCSRB &= ~((0 << URSEL) | (1 << UCSZ2));
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UCSRC &= ~((0 << URSEL) | (1 << UCSZ1) | (1 << UCSZ0));
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switch (data) {
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case d8:
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UCSRB |= (0 << UCSZ2);
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UCSRC |= ((1 << URSEL) | (1 << UCSZ1) | (1 << UCSZ0));
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break;
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case d9:
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UCSRB |= (1 << UCSZ2);
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UCSRC |= ((1 << URSEL) | (1 << UCSZ1) | (1 << UCSZ0));
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break;
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default:
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break;
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}
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UCSRC &= ~((0 << URSEL) | (1 << UPM1) | (1 << UPM0));
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switch (parity) {
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case no:
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UCSRC |= (0 << UPM1) | (0 << UPM0);
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break;
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case even:
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UCSRC |= (1 << UPM1) | (0 << UPM0);
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break;
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case odd:
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UCSRC |= (1 << UPM1) | (1 << UPM0);
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break;
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default:
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break;
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}
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}
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