MAXI Offset - 2020.2 English

Vitis HLS Migration Guide (UG1391)
Document ID
UG1391
Release Date
2020-11-24
Version
2020.2 English
  • Fully Specified Offset: This rule adheres to the user-specified offset settings in the pragma.
  • No-offset Specified: If maxi offset is not specified in the pragma, the global config option: config_interface -m_axi_offset <off/direct/slave> will impact the offset rules.
    • Rule 1: User-specified SAXI Lite: This rule explicitly groups all the maxi offsets into user-specified AXI_lite port, for which the MAXI offset=<slave>
      void top(int *a) {
#pragma HLS interface m_axi port=a
#pragma HLS interface s_axilite port=a
}
    • Rule 2: No SAXI LITE: This rule explicitly groups all the maxi offsets into the tool default offset.
      • For Vitis: - offset = slave
      • For Vivado: - offset = off
      • User Specified: config_interface -m_axi_offset direct 
      void top(int *a, int *b) {
#pragma HLS interface m_axi port=a bundle=M0
#pragma HLS interface m_axi port=b bundle=M0
}