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authorDanny <nooges@users.noreply.github.com>2018-03-24 12:50:44 -0400
committerJack Humbert <jack.humb@gmail.com>2018-03-24 12:50:44 -0400
commit4e92dceed815d00a5492c5606ce7d863606d6507 (patch)
tree9045fc1a3410b3a794ee0d8bf2ee99333a045a3f /keyboards/fourier/i2c.h
parentf77ecb89602e19c464839dc2aa6278ddd64e870f (diff)
Add Fourier Keyboard (#2596)
* Initial commit of Fourier keyboard * Revise keymap, add key to bottom row * Fix readme
Diffstat (limited to 'keyboards/fourier/i2c.h')
-rw-r--r--keyboards/fourier/i2c.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/keyboards/fourier/i2c.h b/keyboards/fourier/i2c.h
new file mode 100644
index 0000000000..c15b6bc506
--- /dev/null
+++ b/keyboards/fourier/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