stm32 fsmc tft lcd made in china

The seller included the pinout for the display. It’s a familiar 16-bit 8080 interface that is easily connected to the FSMC of the STM32 microcontroller. There’s no sign of a step-up DC-DC converter on the board so the white LED’s that make up the backlight must be in a parallel configuration.

The touch screen is compatible with the ADS7843 controller and that can be hooked up to my stm32plus driver. I’ve had varying luck with the touch screens attached to these cheap boards. The ADS7843 is an A-D converter which means that the board should be carefully designed to minimise noise and it seems that not all of them are that well thought out.

This panel is slightly unusual in that its resolution is 400×240 which is less than the full 432×240 supported by the ILI9327. How does that manifest itself? Well, the co-ordinates from 0-31 are not visible. That is, you can write to them but nothing will appear on the screen. Therefore we have to make allowances for that in the stm32plus driver and you will see how in the demo code.

The panel supports 16 bit colour (5-6-5 format) and 18-bit colour (6-6-6 format). The STM32F103 can easily drive either colour format at a fast pace. I’ve come to realise that the observable difference between 64K and 262K colours is pretty low and generally I’ll use 64K for the extra speed that it offers.

Here’s the wiring mapping table that you’re going to need if you intend to hook one of these up to an STM32 MCU. You’re free to change the address line that you use for RS, the bank selector that you use for /CS and the GPIO pin for RESET.

In my example code for this panel I’m using SRAM bank 1 and A16 for RS (register select). This configuration is compatible with the 100 and 144 pin STM32F103 devices.

Firstly we need to include the headers that define the classes we’re going to use. Secondly, since all of stm32plus lives either in the stm32plus namespace or a sub-namespace (in this case stm32plus::display) we will import them into the global namespace to make the declarations of the objects less clumsy looking.

We use an ‘access-mode’ class to control how we communicate with the panel. Here we initialise it to use the FSMC in 16-bit mode with A16 as the RS line (PD11). We will also be wiring up the panel’s RESET line to PE1.

We declare an Fsmc8080Lcdtiming object that takes care of the timing details. The two parameters are the address setup and data setup times in HCLK cycles. At full speed the STM32F1 has a 36MHz FSMC bus and the STM32F4 has a 60MHz bus. Therefore the timings may be different for each MCU if the bus is faster than the panel.

Our example initialises it in portrait mode, 18 bit colour (262K). If you take a look at TftInterfaces.h you will see that following modes are available:

stm32plus includes an interactive gamma adjustment application, and that will be introduced in a future blog post. For now, you can just use the default settings and maybe come back to it later.

stm32plus comes with a PWM backlight controller template class, and a subclass of that called DefaultBacklight that assumes you can connect the backlight regulator to PD13.

Flash memory, STM32F4 controllers include FSMC interfaces and GPIO interface, and FSMC interfaces connection display screen, FSMC interfaces are connected simultaneously

System.Why it is referred to as " variable ", is because by the setting to special function register, FSMC can be deposited according to different outsides

When I purchased the boards from Acelex, they provided me with a link to a STM32F4xx .rar file containing a ton of sample code and datasheets. Most of which in Chinese, but some in english. Google translate to the rescue. There were some examples with the TFT. Perhaps try contacting the seller to get a copy. It"s about 6GB uncompressed.

I have written a C++ driver for 320×240 (QVGA) TFT LCD panels that have an HX8347A controller built in to them. This driver is included with my open source stm32plus C++ library and this article will show you how to use it with the STM32F103* ARM Cortex M3 microcontroller family running at 72Mhz.

By far the most efficient way to attach this device to the MCU is to use the Flexible Static Memory Controller (FSMC) to make writing to the LCD as simple as writing a 16-bit value to a location in the FSMC’s range.

Furthermore, we can control the vital register-select (RS) line by wiring it to one of the FSMC’s data lines. That way we can choose whether we are writing to GRAM or writing to a register by the appropriate selection of a memory address that will activate the RS line.

The above table shows what happens in my demo when I configure address line A16 to be attached to LCD RS. Note that the binary address indicated by the address lines (0x6000 0000 | 1<<16) is one power of two less than the memory address because we set the FSMC up to address in 16-bit mode.

Naturally stm32plus abstracts away all the ugly stuff, and believe me setting up the FSMC is not a pretty sight. Here’s some sample code used to initialise the display.

Firstly we need to include the headers that define the classes we’re going to use. Secondly, since all of stm32plus lives either in the stm32plus namespace or a sub-namespace (in this case stm32plus::display) we will import them into the global namespace to make the declarations of the objects less clumsy looking.

We use an ‘access-mode’ class to control how we communicate with the panel. Here we initialise it to use the FSMC in 16-bit mode with A16 as the RS line (PD11). We will also be wiring up the panel’s RESET line to PE1.

We declare an Fsmc8080Lcdtiming object that takes care of the timing details. The two parameters are the address setup and data setup times in HCLK cycles. At full speed the STM32F1 has a 36MHz FSMC bus and the STM32F4 has a 60MHz bus. Therefore the timings may be different for each MCU if the bus is faster than the panel.

Our example initialises it in portrait mode, 16 bit colour (64K). If you take a look at TftInterfaces.h you will see that following modes are available:

stm32plus includes an interactive gamma adjustment application, and that will be introduced in a future blog post. For now, you can just use the default settings and maybe come back to it later.

stm32plus comes with a PWM backlight controller template class, and a subclass of that called DefaultBacklight that assumes you can connect the backlight regulator to PD13.

In this article, we are looking at the benefits of looking for Chinese TFT LCD manufacturers. Instead of resorting to other manufacturing means, opting for the Chinese is a much wiser and lucrative choice. If you are looking for Chinese LCD manufacturers, you should start with STONE Tech.

Handbags, wallets, phone cases, and other similar items have become the favorites of wholesalers and bulk buyers. These products are directly sold to end consumers. However, the fascinating thing about the Chinese production and manufacturing business is that it does not only cover the end-consumer products. Rather, you can also acquire raw and basic materials needed for the further manufacturing of goods and products. One such product is LCD displays.

LCD displays have become something of a necessity in today’s world of tech advancement. Many things in our daily life have been automated, and are operated using an interactive user interface. For these kinds of machines and gadgets, LCD displays are typically necessary.

In this article, we are looking at the benefits of looking for Chinese LCD manufacturers. Instead of resorting to other manufacturing means, opting for the Chinese is a much wiser and lucrative choice. If you are looking for Chinese LCD manufacturers, you should start with Stoneitech.com.

STONE Tech is an LCD manufacturer located in Beijing, China. It was founded back in 2010, and it has been developing TFT LCD display modules ever since. These modules can be used for a variety of different machines including electric equipment, precision instruments, and civil electronics etcetera.

The same applies to LCD displays. When you save up on costs when buying LCD displays, you can set a lower price for the whole machine or gadget that you are producing.

When it comes to LCD modules, the orders are not received by the hundreds or thousands as is the case with other smaller products such as handbags and wallets etcetera. One module can cost around $250, and it is for this reason that the dynamics are a little different with this business. That is why STONE offers single pieces for sale as well as multiple pieces. This encourages smaller businesses to make their purchases since they can easily purchase as many modules as they like. As long as you meet the limit stated by the supplier, you are good to go.

In the case of LCD modules, this benefit relates to a reselling business. For example, if you are planning on buying some modules to use in your machines etcetera, then there is not a very suitable opportunity for you to expand. If you want to start a business in another country, you will have to open a manufacturing unit there so that your products can be produced and then get sold. Or, you will have to transport your final products to the other country in order to run your business.

However, if you are buying the LCD modules to resale at a profit, you can use the Chinese markets to grow your business. You can buy the modules at a reduced price and then sell them at a profit in a different area or city where the people will be willing to pay more.

Now that we have seen the benefits of choosing Chinese manufacturers for LCD modules, let us narrow it down a bit and look at why you should choose STONE specifically.

One of the main things that you have to look at in any supplier is the level of reliability and trust. This is usually determined by the level of experience and the time that the supplier has spent in the market. STONE was founded in 2010 and has been producing LCD modules for the past 10 years.

If you are looking to buy LCD modules in bulk, look no further than the Middle Kingdom. China has become the hub of mass manufacturing and is the favorite spot for wholesalers and business owners.

In case you need some convincing about buying from the Chinese, we have compiled a list of benefits that you can enjoy when looking for TFT LCD manufacturers in China.