5 files changed, 53 insertions, 0 deletions
diff --git a/fw/fe310/eos/i2c/Makefile b/fw/fe310/eos/i2c/Makefile
new file mode 100644
index 0000000..694fbf8
--- /dev/null
+++ b/fw/fe310/eos/i2c/Makefile
@@ -0,0 +1,17 @@
+include ../../common.mk
+
+CFLAGS += -I..
+
+obj = bq25895.o
+
+
+%.o: %.c %.h
+	$(CC) $(CFLAGS) -c $<
+
+%.o: %.S
+	$(CC) $(CFLAGS) -c $<
+
+all: $(obj)
+
+clean:
+	rm -f *.o
diff --git a/fw/fe310/eos/i2c/bq25895.c b/fw/fe310/eos/i2c/bq25895.c
new file mode 100644
index 0000000..ab56904
--- /dev/null
+++ b/fw/fe310/eos/i2c/bq25895.c
@@ -0,0 +1,24 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "eos.h"
+#include "i2c.h"
+#include "i2c/bq25895.h"
+
+void eos_bq25895_init(void) {
+    uint8_t data = 0;
+    int i, ret = EOS_OK;
+
+    eos_i2c_start(400000);
+    eos_i2c_write8(BQ25895_ADDR, 0, 0x26);  // input current: 2.0 A
+    eos_i2c_write8(BQ25895_ADDR, 2, 0x28);
+    eos_i2c_write8(BQ25895_ADDR, 7, 0x8d);
+
+    printf("BQ25895:\n");
+    for (i=0; i<0x15; i++) {
+        ret = eos_i2c_read8(BQ25895_ADDR, i, &data);
+        if (!ret) printf("REG%02x: %02x\n", i, data);
+    }
+    eos_i2c_stop();
+}
diff --git a/fw/fe310/eos/i2c/bq25895.h b/fw/fe310/eos/i2c/bq25895.h
new file mode 100644
index 0000000..f61a46f
--- /dev/null
+++ b/fw/fe310/eos/i2c/bq25895.h
@@ -0,0 +1,5 @@
+#include <stdint.h>
+
+#define BQ25895_ADDR        0x6A
+
+void eos_bq25895_init(void);
diff --git a/fw/fe310/eos/i2c/drv2605.h b/fw/fe310/eos/i2c/drv2605.h
new file mode 100644
index 0000000..fe90a9b
--- /dev/null
+++ b/fw/fe310/eos/i2c/drv2605.h
@@ -0,0 +1,3 @@
+#include <stdint.h>
+
+#define DRV2605_ADDR        0x5A
diff --git a/fw/fe310/eos/i2c/lsm9ds1.h b/fw/fe310/eos/i2c/lsm9ds1.h
new file mode 100644
index 0000000..92220e7
--- /dev/null
+++ b/fw/fe310/eos/i2c/lsm9ds1.h
@@ -0,0 +1,4 @@
+#include <stdint.h>
+
+#define LSM9DS1_ADDR_AG     0x1E
+#define LSM9DS1_ADDR_M      0x6B