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| # Flexible static memory controller (FSMC) | ||
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| This component of STM32F40x/41x processors allows for the management | ||
| of static memory, flash memory, and PC Cards. Unlike the FMC in more | ||
| advanced MCU models, dynamic memory is not supported. Each type of | ||
| memory has its address bank. The controller offers flexible settings | ||
| for various operating modes. For instance, extended modes can have | ||
| different delays set for read and write operations. It is recommended | ||
| to refer to the STM32 Reference Manual (RM0090) for a detailed description | ||
| of possible modes and corresponding settings. | ||
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| * [Datasheet](https://www.st.com/resource/en/reference_manual/dm00031020-stm32f405-415-stm32f407-417-stm32f427-437-and-stm32f429-439-advanced-arm-based-32-bit-mcus-stmicroelectronics.pdf) - STM32 Reference Manual (RM0090), FSMC chapter. | ||
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| * [Configuration example](../../../../../boards/stm32_f4ve/src/display_ili9341.adb) - display_ili9341.adb: | ||
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| ## Example | ||
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| Configuring Bank_1 for ILI9341 LCD controller: | ||
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| * half word (16 bit access) | ||
| * with write enabled | ||
| * distinct read and write timings | ||
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| ```ada | ||
| STM32.FSMC.Configure | ||
| (Bank_1 => | ||
| (1 => -- TFT is connected to sub-bank 1 | ||
| (Is_Set => True, | ||
| Value => | ||
| (Write_Enable => True, | ||
| Bus_Width => STM32.FSMC.Half_Word, | ||
| Memory_Type => STM32.FSMC.SRAM, | ||
| Bus_Turn => 15, -- 90ns | ||
| Data_Setup => 57, -- 342ns | ||
| Address_Setup => 0, | ||
| Extended => | ||
| (STM32.FSMC.Mode_A, | ||
| Write_Bus_Turn => 3, -- 18ns | ||
| Write_Data_Setup => 2, -- 12ns | ||
| Write_Address_Setup => 0), | ||
| others => <>)), | ||
| others => <>)); | ||
| ``` |
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| # ILI9341 | ||
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| TFT LCD Single Chip Driver 240RGBx320 Resolution and 262K color. | ||
| It has parallel and serial interfaces for MCU. It's also able to | ||
| receive data over RGB interface. | ||
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| The STM32F429 Discovery board utilizes an RGB interface and stores | ||
| graphic data in the main memory. The STM32 F4VE board uses a parallel | ||
| interface and employs ILI9341 memory, which significantly slows down | ||
| drawing but conserves main memory. When using the parallel interface, | ||
| ILI9341 registers are mapped to the MCU's address space through the | ||
| memory controller (FSMC), simplifying and speeding up the drawing. | ||
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| * [Datasheet](http://www.datasheet-pdf.info/attach/1/3707537954.pdf) | ||
| * [Example for RGB interface](../../../../examples/STM32F429_Discovery/draw_stm32f429disco.gpr) for STM32F429 Discovery | ||
| * [Example for parallel interface](../../../../examples/stm32_f4ve/lcd) for STM32 F4VE board |
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| # XPT2046 | ||
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| The XPT2046 is a 4-wire resistive touch screen controller that incorporates | ||
| a 12-bit 125 kHz sampling SAR type A/D converter. Many cheap LCD displays | ||
| contain this controller. Typically, it is connected via SPI. | ||
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| To align the touch point with the display coordinates, it might be | ||
| necessary to calibrate the touch screen. The XPT2046 sensor provides | ||
| raw values within the range of 0 to 4095. If you identify the raw | ||
| values associated with the screen edges, you can perform touch | ||
| panel calibration by invoking the Calibrate procedure. | ||
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| ```ada | ||
| subtype Sensor_Value is HAL.UInt16 range 0 .. 2 ** 12 - 1; | ||
| procedure Calibrate | ||
| (This : in out XPT2046_Device'Class; | ||
| Min_X : Sensor_Value; | ||
| Max_X : Sensor_Value; | ||
| Min_Y : Sensor_Value; | ||
| Max_Y : Sensor_Value); | ||
| ``` | ||
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| * [Datasheet](https://www.datasheet-pdf.info/attach/1/3898350023.pdf) | ||
| * [Example for STM32 F4VE board](../../../../examples/stm32_f4ve/lcd) |
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| # Draw on the screen | ||
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| This example is a modified version of the draw example for | ||
| STM32F429 Discovery. Unlike the original, it does not use | ||
| the Framebuffer interface. Touch the screen to draw. The | ||
| thickness of points and lines during drawing depends on | ||
| the pressure applied and what you touch on the screen. | ||
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| Press the K-UP button for a demo of drawing primitives. | ||
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| For this demo, you need an LCD with a touch panel, which | ||
| is usually sold as part of the STM32 F4VE board kit. |
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| # LCD demo | ||
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| This example demonstrates working with the LCD using the | ||
| HAL.Bitmap.Bitmap_Buffer interface. | ||
| Colorful rectangles are displayed on the screen, and their | ||
| colors change based on the X and Y coordinates. | ||
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| For this demo, you need an LCD, which is usually sold as | ||
| part of the STM32 F4VE board kit. |