[lib] developing the support on forcing pin direction from a specific column in pin table .csv
/* Begin namespace openfpga */
namespace openfpga {
+/* Constants for io pin table csv parser */
+constexpr const int ROW_INDEX_INTERNAL_PIN = 4;
+constexpr const int ROW_INDEX_EXTERNAL_PIN = 5;
+constexpr const int ROW_INDEX_DIRECTION = 6;
+constexpr const int ROW_INDEX_SIDE = 0;
+constexpr const char* DIRECTION_INPUT = "in";
+constexpr const char* DIRECTION_OUTPUT = "out";
+
/********************************************************************
* Parse XML codes about <pin_constraints> to an object of PinConstraints
*******************************************************************/
@@ -40,13 +48,13 @@ IoPinTable read_csv_io_pin_table(const char* fname) {
std::vector<std::string> row_vec = doc.GetRow<std::string>(irow);
IoPinTableId pin_id = io_pin_table.create_pin();
/* Fill pin-level information */
- PortParser internal_pin_parser(row_vec.at(4));
+ PortParser internal_pin_parser(row_vec.at(ROW_INDEX_INTERNAL_PIN));
io_pin_table.set_internal_pin(pin_id, internal_pin_parser.port());
- PortParser external_pin_parser(row_vec.at(5));
+ PortParser external_pin_parser(row_vec.at(ROW_INDEX_EXTERNAL_PIN));
io_pin_table.set_external_pin(pin_id, external_pin_parser.port());
- std::string pin_side_str = row_vec.at(0);
+ std::string pin_side_str = row_vec.at(ROW_INDEX_SIDE);
if (side_str_map.end() == side_str_map.find(pin_side_str)) {
VTR_LOG(
"Invalid side defintion (='%s')! Expect [TOP|RIGHT|LEFT|BOTTOM]\n",
@@ -69,6 +77,18 @@ IoPinTable read_csv_io_pin_table(const char* fname) {
"Invalid direction defintion! Expect [A2F|F2A] in the pin name\n");
exit(1);
}
+
+ /* Parse pin direction from a specific column, this has a higher priority than inferring from pin names */
+ std::string port_dir_str = row_vec.at(ROW_INDEX_DIRECTION);
+ if (port_dir_str == std::string(DIRECTION_INPUT)) {
+ io_pin_table.set_pin_direction(pin_id, IoPinTable::INPUT);
+ } else if (port_dir_str == std::string(DIRECTION_OUTPUT)) {
+ io_pin_table.set_pin_direction(pin_id, IoPinTable::OUTPUT);
+ } else {
+ VTR_LOG(
+ "Invalid direction defintion! Expect [%s|%s] in the GPIO direction\n", DIRECTION_INPUT, DIRECTION_OUTPUT);
+ exit(1);
+ }
}
return io_pin_table;
