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feat(ex02): done

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Maix0 2026-04-24 14:43:35 +02:00
parent b7580c043c
commit 0fe7dbdc0f
23 changed files with 1469 additions and 0 deletions
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ex02/include/i2c.h Normal file
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#ifndef I2C_H
#define I2C_H
#include <avr/io.h>
#include <util/twi.h>
#define PCA9555_ADDR_OTHER 0b0100111
#define PCA9555_ADDR_SELF 0b0100000
#define REG_INPUT_PORT0 0x00
#define REG_INPUT_PORT1 0x01
#define REG_OUTPUT_PORT0 0x02
#define REG_OUTPUT_PORT1 0x03
#define REG_CONFIG_PORT0 0x06
#define REG_CONFIG_PORT1 0x07
#define I2C_CLOCK 100000UL
#define I2C_ADDR(ADDR, RW) ((ADDR) << 1 | (RW & 1))
void i2c_init(void);
void i2c_start(void);
void i2c_stop(void);
void i2c_write(uint8_t);
uint8_t i2c_read_nack(void);
uint8_t i2c_read_ack(void);
uint8_t pca9555_read(uint8_t addr, uint8_t reg);
void pca9555_write(uint8_t addr, uint8_t reg, uint8_t value);
static inline void pca9555_set_output(uint8_t addr, uint8_t port, uint8_t mask) {
uint8_t cfg = pca9555_read(addr, port);
cfg &= ~mask;
pca9555_write(addr, port, cfg);
}
static inline void pca9555_set_low(uint8_t addr, uint8_t port, uint8_t mask) {
uint8_t out = pca9555_read(addr, port);
out &= ~mask; // clear bit
pca9555_write(addr, port, out);
}
static inline void pca9555_set_high(uint8_t addr, uint8_t port, uint8_t mask) {
uint8_t out = pca9555_read(addr, port);
out |= mask; // set bit;
pca9555_write(addr, port, out);
}
static inline void pca9555_toggle(uint8_t addr, uint8_t port, uint8_t mask) {
uint8_t out = pca9555_read(addr, port);
out ^= mask;
pca9555_write(addr, port, out);
}
#endif /* I2C_H */