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author | ishtob <[email protected]> | 2017-07-11 13:53:50 -0400 |
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committer | Jack Humbert <[email protected]> | 2017-07-11 13:53:50 -0400 |
commit | cc6db9c5408ad303b9d3f47e4deaf78b4fc854d3 (patch) | |
tree | 1995e0fdfc41de938723752478eb6d45c2f7b2c3 /keyboards/hadron/i2c.h | |
parent | 886af3250722f0aac2a8d37771ef8fe6b937f4cb (diff) | |
download | qmk_firmware-cc6db9c5408ad303b9d3f47e4deaf78b4fc854d3.tar.gz qmk_firmware-cc6db9c5408ad303b9d3f47e4deaf78b4fc854d3.zip |
Adds Hadron Keyboard (#1492)
* adding hadron keymaps
* fix embedded comment
* fixed TWI driver path
* Delete glcdfont.c
* Delete ssd1306.c
* Delete ssd1306.h
* Update readme.md
Diffstat (limited to 'keyboards/hadron/i2c.h')
-rw-r--r-- | keyboards/hadron/i2c.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/keyboards/hadron/i2c.h b/keyboards/hadron/i2c.h new file mode 100644 index 0000000000..2bd7f40968 --- /dev/null +++ b/keyboards/hadron/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 800000L + +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 |