diff options
author | Danny <[email protected]> | 2018-04-25 13:47:13 -0400 |
---|---|---|
committer | Drashna Jaelre <[email protected]> | 2018-04-25 10:47:13 -0700 |
commit | eb89a372ec8950a853aef9e2730339465dc3dc2a (patch) | |
tree | a20867dbb40228a0509dab32e4cd7354595162be /keyboards/bfo9000/i2c.h | |
parent | 1c6b9323b25f8ec38f86addd4ba249faa5986cb3 (diff) | |
download | qmk_firmware-eb89a372ec8950a853aef9e2730339465dc3dc2a.tar.gz qmk_firmware-eb89a372ec8950a853aef9e2730339465dc3dc2a.zip |
Add BFO-9000 keyboard (#2807)
Diffstat (limited to 'keyboards/bfo9000/i2c.h')
-rw-r--r-- | keyboards/bfo9000/i2c.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/keyboards/bfo9000/i2c.h b/keyboards/bfo9000/i2c.h new file mode 100644 index 0000000000..c15b6bc506 --- /dev/null +++ b/keyboards/bfo9000/i2c.h @@ -0,0 +1,49 @@ +#ifndef I2C_H +#define I2C_H + +#include <stdint.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 |