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authorVegard Storheil Eriksen <zyp@jvnv.net>2012-08-07 16:50:46 +0200
committerVegard Storheil Eriksen <zyp@jvnv.net>2012-08-07 16:50:46 +0200
commite586c178073b9a0fee90d5fc8e795d266ebd7b7d (patch)
treeca9a9c40bab37d5af440c80833755223e2bdd946 /i2c/i2c.h
Initial import.
Most sources are split off from suzumebachi project revision 2fc77d2 as is with some path changes. New build rules introduced.
Diffstat (limited to 'i2c/i2c.h')
-rw-r--r--i2c/i2c.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/i2c/i2c.h b/i2c/i2c.h
new file mode 100644
index 0000000..f4d6949
--- /dev/null
+++ b/i2c/i2c.h
@@ -0,0 +1,62 @@
+#ifndef I2C_H
+#define I2C_H
+
+#include <stdint.h>
+#include <interrupt/interrupt.h>
+#include <gpio/pin.h>
+
+struct I2C_reg_t {
+ volatile uint32_t CR1;
+ volatile uint32_t CR2;
+ volatile uint32_t OAR1;
+ volatile uint32_t OAR2;
+ volatile uint32_t DR;
+ volatile uint32_t SR1;
+ volatile uint32_t SR2;
+ volatile uint32_t CCR;
+ volatile uint32_t TRISE;
+};
+
+class I2C_t {
+ private:
+ volatile uint8_t addr;
+ volatile uint8_t writing;
+ volatile uint8_t reading;
+ volatile uint8_t* write_p;
+ volatile uint8_t* read_p;
+
+ volatile bool busy;
+
+ public:
+ I2C_reg_t& reg;
+ const uint32_t clk;
+ Interrupt::IRQ irq_ev_n;
+ Interrupt::IRQ irq_er_n;
+
+ I2C_t(uint32_t reg_addr, uint32_t bus_clk, Interrupt::IRQ ev_n, Interrupt::IRQ er_n) : reg(*(I2C_reg_t*)reg_addr), clk(bus_clk), irq_ev_n(ev_n), irq_er_n(er_n) {
+ reading = writing = 0;
+ }
+
+ void irq_ev();
+ void irq_er();
+
+ void handle_error();
+
+ void enable(Pin& scl, Pin& sda);
+
+ void write_reg(uint8_t addr_, uint8_t reg_, uint8_t data);
+ void read_reg(uint8_t addr_, uint8_t reg_, uint8_t len, uint8_t* buf);
+};
+
+#if defined(STM32F1)
+extern I2C_t I2C1;
+extern I2C_t I2C2;
+#elif defined(STM32F4)
+extern I2C_t I2C1;
+extern I2C_t I2C2;
+extern I2C_t I2C3;
+#endif
+
+typedef I2C_t I2C;
+
+#endif