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author | Erez Zukerman <bulk@ezuk.org> | 2018-05-15 10:50:24 -0400 |
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committer | Erez Zukerman <bulk@ezuk.org> | 2018-05-15 10:50:24 -0400 |
commit | 5272218ac9cff7ce5af8cfda9129dc03b7aafa49 (patch) | |
tree | 61ad3987770684afd55cbdd12bca48a221d83713 /keyboards/vitamins_included/i2c.h | |
parent | 0592d23b74142a554c9e36d2da7bf525fbe3a4c0 (diff) | |
parent | e41147da929afd15c1088226893cc02537650284 (diff) | |
download | firmware-5272218ac9cff7ce5af8cfda9129dc03b7aafa49.tar.gz firmware-5272218ac9cff7ce5af8cfda9129dc03b7aafa49.tar.bz2 firmware-5272218ac9cff7ce5af8cfda9129dc03b7aafa49.zip |
Merge branch 'master' into hf/shinydox
Diffstat (limited to 'keyboards/vitamins_included/i2c.h')
-rw-r--r-- | keyboards/vitamins_included/i2c.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/keyboards/vitamins_included/i2c.h b/keyboards/vitamins_included/i2c.h new file mode 100644 index 000000000..739d134be --- /dev/null +++ b/keyboards/vitamins_included/i2c.h @@ -0,0 +1,50 @@ +#ifndef I2C_H +#define I2C_H + +#include <stdint.h> +#include "split_util.h" + +#ifndef F_CPU +#define F_CPU 16000000UL +#endif + +#define I2C_READ 1 +#define I2C_WRITE 0 + +#define I2C_ACK 1 +#define I2C_NACK 0 + +#define SLAVE_BUFFER_SIZE 0x10 + +// i2c SCL clock frequency +#define SCL_CLOCK 400000L + +extern volatile uint8_t i2c_slave_buffer[SLAVE_BUFFER_SIZE]; + +void i2c_master_init(void); +uint8_t i2c_master_start(uint8_t address); +void i2c_master_stop(void); +uint8_t i2c_master_write(uint8_t data); +uint8_t i2c_master_read(int); +void i2c_reset_state(void); +void i2c_slave_init(uint8_t address); + + +static inline unsigned char i2c_start_read(unsigned char addr) { + return i2c_master_start((addr << 1) | I2C_READ); +} + +static inline unsigned char i2c_start_write(unsigned char addr) { + return i2c_master_start((addr << 1) | I2C_WRITE); +} + +// from SSD1306 scrips +extern unsigned char i2c_rep_start(unsigned char addr); +extern void i2c_start_wait(unsigned char addr); +extern unsigned char i2c_readAck(void); +extern unsigned char i2c_readNak(void); +extern unsigned char i2c_read(unsigned char ack); + +#define i2c_read(ack) (ack) ? i2c_readAck() : i2c_readNak(); + +#endif |