12/28/2023 0 Comments Githubb and arduino libraries![]() ![]() you need to manually modify the generated. In order to use generated fonts on Uno, Mega. Call tft.setFont(name_from_step_6) and tft.print to render the text.Add an include in your sketch, #include "name_from_step_9.h".h file where your sketch is (or wherever you can find it). If you do not see the file immediately, just wait for it. When you click Save, the app starts to export but there is no visible progress.Also add ".h" to your file name so you do not have to add it afterwards. No spaces and the same name as in step 6. From the menu select Export->Export Font.I advice to use maximum of 8 characters, no spaces. That will give you numbers 0-9 in your set. if you just need the numbers, set the Start Index to 48 and Char Count to 10. Set the Char Count, that's the number of characters starting at the Start Index you want to have in your character set.The numbers start at index 48, upper-case characters at index 65, etc. The first character (space) starts at index 32. Set the Start Index, that's the index from the character map.Select the Font, Size and Style you want to import in the Import Font group.GLCDFontCreator2 tool requires Java and it is included in the tools folder or you can dowload it from The maximum height of a font can be 255 px. h files that can then be included in your sketch and the font can be set by the setFont function. You can create your own font files by using GLCDFontCreator2 tool. So the total angle offset from the default East point is ARC_ANGLE_OFFSET+setAngleOffset value. The value provided in setAngleOffset argument is *in addition* to ARC_ANGLE_OFFSET value. You can change the offset at runtime by calling the setAngleOffset function. Setting the value to -90 will move the starting point 90 degress counter-clockwise (so to the North point). If you imagine a compass, then the default starting position is at the East point. This number is an offset in degrees from the default position where the arc starts (representing value of 0). If you set ARC_ANGLE_MAX 2*PI, you can pass inĪngles in radians etc.You can change the default at runtime by calling the setArcParams function. If you set ARC_ANGLE_MAX 100 and you pass in start=0 and end=50 then you get a half circle (that can represent percentages). The default is 360 so if you pass in start=25 and end=75 you'll get an arc going from 25 degrees to 75 degrees. This number represents the maximum equal to 360 degrees (full circle). If you do not need scaled fonts ( setTextScale function) then you can comment out the define to disable support for text scaling. You can change the clock divider at runtime by calling the setSPIClockDivider function. This is used to set the SPI clock frequency on AVR based boards (Uno, Mega.). #define ILI9341_SPI_CLKDIVIDER SPI_CLOCK_DIV2 // for Uno, Mega. I was using 20cm dupont cables to connect TFT with Due and haven't had any issues running it with the divider set to 2. If you are getting glitches on the screen or it just does not work try to use a higher divider to bring the frequency down (e.g. The minimum divider is 1 (84MHz) and maximum is 255 (329kHz). This is used to set the SPI clock frequency on Due, which for example when set to 10 will set the SPI clock frequency to 84MHz/10=8.4MHz. #define ILI9341_SPI_CLKDIVIDER 2 // for Due Here is a video where you can see the speed difference between the modes (v0.x version): SPI_MODE_DMA is utilizing D(irect) M(emory) A(ddress) to do SPI transfers. You are restricted to these 3 pins for CS - 4, 10 and 52 (as described here). SPI_MODE_EXTENDED is the extended SPI mode available in Due the CS pin is handled by the chip (which is faster than handling it in code 'manually'). In this mode the library will drive the CS pin 'manually'. SPI_MODE_NORMAL is the standard SPI mode where you can use any digital pin for CS. For AVR, it does not matter which mode you use, ILI9341_SPI_MODE_NORMAL is always going to be used since there is no Extended SPI or DMA available on AVRs. Uncomment the line depending on the SPI mode you want to use. #define ILI9341_SPI_MODE_EXTENDED // make sure you use pin 4, 10 or 52 for CS SPI Mode // comment out the SPI mode you want to use Some of the default settings can be set in ILI9341_due_config.h file. The pin for CS on Due depends on the SPI mode you choose (see SPI Mode section below for details). GText class from GLCD library was used as a base for rendering custom fonts.Īs for the wiring, use Due's and AVR's HW SPI pins (e.g. One class from SdFat library is used for utilizing Due's DMA in SPI transfers which provides the main speed boost. Ili9341_t3 library where various optimizations for Adafruit's ili9341 and GFX libraries were implemented was used as a base for ili9341_due. ![]() GLCD from Michael Margolis and Bill Perry. ![]()
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