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Add christmas edition

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This commit is contained in:
Andras Schmelczer 2026-06-06 15:23:48 +01:00
commit b62af486a7
1 changed files with 3422 additions and 1 deletions
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30
christmas/AdAstra/src/hardware_access/spi/spi.c Normal file
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#include "spi.h"
#include <avr/interrupt.h>
#define SWAP_BIT (BV(USIWM0) | BV(USICLK) | BV(USITC) | BV(USICS1))
void sendByteOnSPI(uint8_t byte) {
USIDR = byte;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
USICR = SWAP_BIT;
}