migration

modbus.h

@@ -0,0 +1,62 @@
+/************************************************************************//**
+ * \file	modbus.h
+ * \brief	Modbus serial library
+ ***************************************************************************/
+
+#ifndef MODBUS_H
+#define	MODBUS_H
+
+#include <stdint.h>
+
+extern uint8_t modbusAddress;
+extern uint16_t input_registers[2];
+extern uint16_t holding_registers[2];
+
+/**
+ * Initializes this Modbus library. 
+ * 
+ * Initialize pins, timer, serial port and variables. Interrupts 
+ * MUST be initialized for the  timer and the serial port.
+ * 
+ * @param address : the Modbus address of this device
+ * 
+ * @see modbus_char_recvd
+ * @see modbus_timer
+ * @see interrupts.c
+ */
+void modbus_init(uint8_t address);
+
+/**
+ * Analyses the received frame and answer to server
+ * 
+ * @return an error code if frame not valid
+ */
+uint8_t modbus_analyse_and_answer(void);
+
+/**
+ * Send the Modbus frame on tx_buf with CRC added
+ * 
+ * @param length : length of the frame without the CRC 
+ */
+void modbus_send(uint8_t length);
+
+/**
+ *  
+ * This function will be called every time a character has been received on the
+ * Modbus serial port. It is called from the interrupt hander.
+ * 
+ * @param c : the received char
+ * @see interrupts.c.
+ */
+void modbus_char_recvd(uint8_t c);
+
+/**
+ * Modbus timer finished. This function is called by the interrupt handler 
+ * when a MODBUS frame is finished. It must analyse the received packet 
+ * and reply if required.
+ * 
+ * @see interrupts.c
+ */
+void modbus_timer(void);
+
+#endif /* MODBUS_H */