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author | Danny <nooges@users.noreply.github.com> | 2018-07-12 19:26:50 +0200 |
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committer | Drashna Jaelre <drashna@live.com> | 2018-07-12 19:26:49 +0200 |
commit | 9a1613dd1a86e8db65d68756cea48d9d9ba075d8 (patch) | |
tree | 247db8b9b7bb42ae1ef2c1c4fc9da7d49d4e90dd /keyboards/quefrency/i2c.h | |
parent | f30d6dd7858dfa3a0cf214113e8b1d45b30d74ce (diff) | |
download | qmk_firmware-9a1613dd1a86e8db65d68756cea48d9d9ba075d8.tar.gz qmk_firmware-9a1613dd1a86e8db65d68756cea48d9d9ba075d8.tar.xz |
Add Quefrency Keyboard (#3376)
* Fork Fourier keyboard to Quefrency
* Set Quefrency pinouts and initial keymap
* Set configurator layout
Diffstat (limited to 'keyboards/quefrency/i2c.h')
-rw-r--r-- | keyboards/quefrency/i2c.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/keyboards/quefrency/i2c.h b/keyboards/quefrency/i2c.h new file mode 100644 index 000000000..c15b6bc50 --- /dev/null +++ b/keyboards/quefrency/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 |