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This commit is contained in:
Tristan Krause 2019-04-02 10:59:37 +02:00
parent 86da74bed0
commit 8e785e4b70
15 changed files with 443 additions and 282 deletions
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27
firmware/usart.h
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@ -5,15 +5,20 @@
#include <util/delay.h>
#include <stdint.h>
constexpr uint32_t BAUDRATE = 115200; // 38400
constexpr uint8_t CRC7_POLY = 0x91;
constexpr uint8_t MAX_BLOCK_SIZE = 16;
enum BlockSequence
{
IDLE = 0,
LEN = 1,
DATA = 2,
CRC = 3,
END = 4,
};
class USART
{
public:
void init(void);
void flush(void);
void clearInputBuffer(void);
void writeByte(uint8_t);
void writeInt(uint16_t);
@ -23,10 +28,24 @@ public:
uint8_t readByte(void);
uint16_t readInt(void);
uint32_t readLong(void);
void nextByte(uint8_t byte);
void readBlock(uint8_t*, uint8_t);
constexpr static uint8_t MSG_OK = 0xFF;
constexpr static uint8_t MSG_FAIL = 0xFE;
uint8_t block_pos = 0;
// constants
constexpr static uint32_t BAUDRATE = 115200; // 38400
constexpr static uint8_t CRC7_POLY = 0x91;
constexpr static uint8_t MAX_BLOCK_SIZE = 64;
constexpr static uint8_t BLOCK_END = 0x80;
private:
uint8_t block_buffer[MAX_BLOCK_SIZE + 3]; // don't store BLOCK_END byte
uint8_t crc;
BlockSequence seq = BlockSequence::IDLE;
};
#endif // USART_H