Use external SPI Flash for fonts¶
The Commercial edition allows to use an external SPI Flash to store fonts. The EXT3.1 extension board includes an external 8 Mbits = 1 MBytes x 8 SPI Flash memory, labelled U1.
The corresponding chip select pin is numbered 8 on the EXT3, EXT3.1 and EXT4 extension boards.
| Variable | Number | Signal | Type | Function |
|---|---|---|---|---|
.flashCS |
8 | Flash /CS | I |
Flash chip select |
Configure¶
The fonts need to be uploaded to external SPI Flash.
Optionally, new fonts van be generated.
Use¶
Refer to the procedure Use fonts from external SPI Flash.
Example¶
The example for external SPI SRAM is identical to the example for internal MCU SRAM.