chenjianqiang 90a8945930 psram: support psram 2T mode to fix single bit error
1. add enable PSRAM 2T mode function
2. abort when himem and 2T mode are enabled meanwhile
3. set SPIRAM_2T_MODE as "n" by default, enable it when needed
2020-04-13 14:26:45 +08:00
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2019-11-05 14:56:16 +01:00
2019-11-21 10:40:49 +08:00