3 files changed, 65 insertions, 0 deletions
diff --git a/include/can/global.h b/include/can/global.h
new file mode 100644
index 0000000..5d88fe6
--- /dev/null
+++ b/include/can/global.h
@@ -0,0 +1,20 @@
+#include <stdint.h>
+
+#ifndef _IOE_CAN_GLOBAL_
+#define _IOE_CAN_GLOBAL_
+
+typedef struct {
+    uint16_t id;
+    uint8_t length;
+    uint8_t data[8];
+} CanFrame;
+
+typedef struct {
+    CanFrame **buffer;
+    void *udata;
+} Can;
+
+
+void can_send(Can *can, CanFrame *frame);
+
+#endif /* _IOE_CAN_GLOBAL_ */
diff --git a/include/can/mcp2515.h b/include/can/mcp2515.h
new file mode 100644
index 0000000..59376f7
--- /dev/null
+++ b/include/can/mcp2515.h
@@ -0,0 +1,36 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <stdint.h>
+
+#include "spi.h"
+#include "global.h"
+
+#ifndef _IOE_CAN_MCP2515_H_
+#define _IOE_CAN_MCP2515_H_
+#ifdef CONFIG_IOE_CAN_MCP2515
+#ifndef CONFIG_IOE_SPI
+#error "Please define CONFIG_IOE_SPI. MCP2515 requires SPI."
+#endif
+
+// TODO registers
+#define CAN_MCP2515_CANCTL
+// TODO buffers
+
+typedef struct {
+    uint8_t group, mask;
+} CanMcp2515;
+
+int8_t can_mcp2515_init(CanMcp2515 * can, uint8_t group, uint8_t mask);
+
+void can_mcp2515_reset(CanMcp2515 * can);
+uint8_t can_mcp2515_read(CanMcp2515 * can, uint8_t address);
+uint8_t can_mcp2515_readrx(CanMcp2515 * can, uint8_t buffer);
+void can_mcp2515_write(CanMcp2515 * can, uint8_t address, uint8_t data);
+void can_mcp2515_loadrx(CanMcp2515 * can, uint8_t buffer, uint8_t data);
+uint8_t can_mcp2515_rdstat(CanMcp2515 * can);
+uint8_t can_mcp2515_rxstat(CanMcp2515 * can);
+void can_mcp2515_bitmod(CanMcp2515 * can, uint8_t address, uint8_t mask,
+                        uint8_t data);
+
+#endif /* CONFIG_IOE_CAN_MCP2515 */
+#endif /* _IOE_CAN_MCP2515_H_ */
diff --git a/include/can/software.h b/include/can/software.h
new file mode 100644
index 0000000..b443e42
--- /dev/null
+++ b/include/can/software.h
@@ -0,0 +1,9 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <stdint.h>
+
+#ifndef _IOE_CAN_SOFTWARE_H_
+#define _IOE_CAN_SOFTWARE_H_
+
+
+#endif /* _IOE_CAN_SOFTWARE_H_ */