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authorTerryMathews <terry@terrymathews.net>2018-01-25 01:00:59 -0500
committerJack Humbert <jack.humb@gmail.com>2018-01-25 01:00:59 -0500
commit61d851af6594be3b52c316be29115e282dc2a4f2 (patch)
tree5916bbe9fc716b5d8d4f7367b41a205248e31deb /keyboards/tkc1800/i2c.h
parent7c3d2d5f64061db8ff54aefe3e41b0505aa9f4e8 (diff)
Add SSD1306 OLED display support to TKC1800 (#2293)
* Add support for SSD1306 OLED display * Correct keymap Had tilde on keymap instead of grave, corrected. * Winkeyless keymap
Diffstat (limited to 'keyboards/tkc1800/i2c.h')
-rw-r--r--keyboards/tkc1800/i2c.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/keyboards/tkc1800/i2c.h b/keyboards/tkc1800/i2c.h
new file mode 100644
index 0000000000..2bd7f40968
--- /dev/null
+++ b/keyboards/tkc1800/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