lattice: added support for reset method (only tested with ECP5

Author: trabucayre

src/lattice.cpp

@@ -702,6 +702,13 @@ bool Lattice::post_flash_access()
 	_jtag->go_test_logic_reset();
 	return true;
 }
+void Lattice::reset()
+{
+	if (_fpga_family == ECP5_FAMILY)
+		post_flash_access();
+	else
+		printError("Lattice Reset only tested on ECP5 Family.");
+}
 
 bool Lattice::clearSRAM()
 {

src/lattice.hpp

@@ -25,7 +25,7 @@ class Lattice: public Device, SPIInterface {
 			int8_t verbose, bool skip_load_bridge, bool skip_reset);
 		uint32_t idCode() override;
 		int userCode();
-		void reset() override {}
+		void reset() override;
 		void program(unsigned int offset, bool unprotect_flash) override;
 		bool program_mem();
 		bool program_flash(unsigned int offset, bool unprotect_flash);