3.5" inch TFT LCD Display Module 480X320 driven with FSMC.
TFT LCD Display Module 480X320 driven with FSMC
I have recently bought a 3.5" inch TFT LCD Touch Screen Display Module 480X320 with a www.mcufriend.com
label on the back side. The display was equipped with an 8bit parallel interface. First I decided to test it with the UniGraphic library using the BUS_8
protocol. The display was very slow but improved when I switched to the PAR_8
protocol. Because I heard about the possibility to use a Flexible Static Memory Controller (FSMC), built into some STM MCU's, to drive LCD's (read/write to LCD's memory rather than to an external SRAM) I thought it would be a fun to try it out.
Below is the brief story of what I did:
- Created a project for my STM32F407VE board in the STM32CubeIDE
- Set the
Clock Configuration
to match the one used by Mbed for the Seeed Arch Max board:
- Selected
FSMC
in theConnectivity
category and configured it as below: - Let the
STM32CubeIDE
generate the code (files). - Created a new program for the Seeed Arch Max target in the Mbed Online Compiler by selecting a
mbed os blinky
template. - Replaced the
main.cpp
with themain.c
content of theSTM32CubeIDE
project. Copy & Pasted
the other files with codes from theSTM32CubeIDE
project to the online compiler project.- Renamed and modified:
"stm32f4xx_it.h" to "stm32f4xx_it_msp.h"
"stm32f4xx_it.c" to "stm32f4xx_it_msp.c" - Added the UniGraphic library to the online compiler project.
- Extended the
UniGraphic
library with aFSMC_8
protocol and replaced theTFT::set_orientation(int orient)
function with the one used bymcufriend
for arduino. - Modified the
main.cpp
as needed.
Wiring
STM32F407VE | TFT LCD module |
---|---|
+3.3V | 3V3 |
GND | GND |
PB_12 | LCD_RST |
GND | LCD_CS |
PD_13 (RS) | LCD_RS |
PD_5 (WR) | LCD_WR |
PD_4 (RD) | LCD_RD |
PD_14 (DB00) | LCD_D0 |
PD_15 (DB01) | LCD_D1 |
PD_0 (DB02) | LCD_D2 |
PD_1 (DB03) | LCD_D3 |
PE_7 (DB04) | LCD_D4 |
PE_8 (DB05) | LCD_D5 |
PE_9 (DB06) | LCD_D6 |
PE_10 (DB07) | LCD_D7 |
Results
Execution times | ||
---|---|---|
Used protocol | BUS_8 | FSMC_8 |
Operation \ Time | ms | ms |
Clear | 2283.980 | 38.454 |
Plot | 192.066 | 11.365 |
8bit BMP | 63.805 | 41.338 |
Large Font | 163.872 | 7.895 |
Sparce pixels | 2072.265/1458.051 | 74.107/52.168 |
16bit BMP | 2288.589 | 59.904 |
README.md@1:47c996032a9e, 2020-09-25 (annotated)
- Committer:
- hudakz
- Date:
- Fri Sep 25 14:52:27 2020 +0000
- Revision:
- 1:47c996032a9e
- Parent:
- 0:fa952828e34c
3.5" inch TFT LCD Display Module 480X320 driven with FSMC.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
hudakz | 0:fa952828e34c | 1 | ![](./resources/official_armmbed_example_badge.png) |
hudakz | 0:fa952828e34c | 2 | # Blinky Mbed OS example |
hudakz | 0:fa952828e34c | 3 | |
hudakz | 0:fa952828e34c | 4 | The example project is part of the [Arm Mbed OS Official Examples](https://os.mbed.com/code/) and is the [getting started example for Mbed OS](https://os.mbed.com/docs/mbed-os/v5.14/quick-start/index.html). It contains an application that repeatedly blinks an LED on supported [Mbed boards](https://os.mbed.com/platforms/). |
hudakz | 0:fa952828e34c | 5 | |
hudakz | 0:fa952828e34c | 6 | You can build the project with all supported [Mbed OS build tools](https://os.mbed.com/docs/mbed-os/latest/tools/index.html). However, this example project specifically refers to the command-line interface tool [Arm Mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli). |
hudakz | 0:fa952828e34c | 7 | (Note: To see a rendered example you can import into the Arm Online Compiler, please see our [import quick start](https://os.mbed.com/docs/mbed-os/latest/quick-start/online-with-the-online-compiler.html#importing-the-code).) |
hudakz | 0:fa952828e34c | 8 | |
hudakz | 0:fa952828e34c | 9 | 1. [Install Mbed CLI](https://os.mbed.com/docs/mbed-os/latest/quick-start/offline-with-mbed-cli.html). |
hudakz | 0:fa952828e34c | 10 | |
hudakz | 0:fa952828e34c | 11 | 1. Clone this repository on your system, and change the current directory to where the project was cloned: |
hudakz | 0:fa952828e34c | 12 | |
hudakz | 0:fa952828e34c | 13 | ```bash |
hudakz | 0:fa952828e34c | 14 | $ git clone git@github.com:armmbed/mbed-os-example-blinky && cd mbed-os-example-blinky |
hudakz | 0:fa952828e34c | 15 | ``` |
hudakz | 0:fa952828e34c | 16 | |
hudakz | 0:fa952828e34c | 17 | Alternatively, you can download the example project with Arm Mbed CLI using the `import` subcommand: |
hudakz | 0:fa952828e34c | 18 | |
hudakz | 0:fa952828e34c | 19 | ```bash |
hudakz | 0:fa952828e34c | 20 | $ mbed import mbed-os-example-blinky && cd mbed-os-example-blinky |
hudakz | 0:fa952828e34c | 21 | ``` |
hudakz | 0:fa952828e34c | 22 | |
hudakz | 0:fa952828e34c | 23 | |
hudakz | 0:fa952828e34c | 24 | ## Application functionality |
hudakz | 0:fa952828e34c | 25 | |
hudakz | 0:fa952828e34c | 26 | The `main()` function is the single thread in the application. It toggles the state of a digital output connected to an LED on the board. |
hudakz | 0:fa952828e34c | 27 | |
hudakz | 0:fa952828e34c | 28 | ## Building and running |
hudakz | 0:fa952828e34c | 29 | |
hudakz | 0:fa952828e34c | 30 | 1. Connect a USB cable between the USB port on the board and the host computer. |
hudakz | 0:fa952828e34c | 31 | 2. <a name="build_cmd"></a> Run the following command to build the example project and program the microcontroller flash memory: |
hudakz | 0:fa952828e34c | 32 | ```bash |
hudakz | 0:fa952828e34c | 33 | $ mbed compile -m <TARGET> -t <TOOLCHAIN> --flash |
hudakz | 0:fa952828e34c | 34 | ``` |
hudakz | 0:fa952828e34c | 35 | The binary is located at `./BUILD/<TARGET>/<TOOLCHAIN>/mbed-os-example-blinky.bin`. |
hudakz | 0:fa952828e34c | 36 | |
hudakz | 0:fa952828e34c | 37 | Alternatively, you can manually copy the binary to the board, which you mount on the host computer over USB. |
hudakz | 0:fa952828e34c | 38 | |
hudakz | 0:fa952828e34c | 39 | Depending on the target, you can build the example project with the `GCC_ARM`, `ARM` or `IAR` toolchain. After installing Arm Mbed CLI, run the command below to determine which toolchain supports your target: |
hudakz | 0:fa952828e34c | 40 | |
hudakz | 0:fa952828e34c | 41 | ```bash |
hudakz | 0:fa952828e34c | 42 | $ mbed compile -S |
hudakz | 0:fa952828e34c | 43 | ``` |
hudakz | 0:fa952828e34c | 44 | |
hudakz | 0:fa952828e34c | 45 | ## Expected output |
hudakz | 0:fa952828e34c | 46 | The LED on your target turns on and off every 500 milliseconds. |
hudakz | 0:fa952828e34c | 47 | |
hudakz | 0:fa952828e34c | 48 | |
hudakz | 0:fa952828e34c | 49 | ## Troubleshooting |
hudakz | 0:fa952828e34c | 50 | If you have problems, you can review the [documentation](https://os.mbed.com/docs/latest/tutorials/debugging.html) for suggestions on what could be wrong and how to fix it. |
hudakz | 0:fa952828e34c | 51 | |
hudakz | 0:fa952828e34c | 52 | ## Related Links |
hudakz | 0:fa952828e34c | 53 | |
hudakz | 0:fa952828e34c | 54 | * [Mbed OS Stats API](https://os.mbed.com/docs/latest/apis/mbed-statistics.html). |
hudakz | 0:fa952828e34c | 55 | * [Mbed OS Configuration](https://os.mbed.com/docs/latest/reference/configuration.html). |
hudakz | 0:fa952828e34c | 56 | * [Mbed OS Serial Communication](https://os.mbed.com/docs/latest/tutorials/serial-communication.html). |
hudakz | 0:fa952828e34c | 57 | * [Mbed OS bare metal](https://os.mbed.com/docs/mbed-os/latest/reference/mbed-os-bare-metal.html). |
hudakz | 0:fa952828e34c | 58 | * [Mbed boards](https://os.mbed.com/platforms/). |
hudakz | 0:fa952828e34c | 59 | |
hudakz | 0:fa952828e34c | 60 | ### License and contributions |
hudakz | 0:fa952828e34c | 61 | |
hudakz | 0:fa952828e34c | 62 | The software is provided under Apache-2.0 license. Contributions to this project are accepted under the same license. Please see contributing.md for more info. |
hudakz | 0:fa952828e34c | 63 | |
hudakz | 0:fa952828e34c | 64 | This project contains code from other projects. The original license text is included in those source files. They must comply with our license guide. |