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Interface TFT display with STM32 in parallel mode || CubeIDE || CubeMX || HAL
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Oct 6, 2019
Purchase the Products shown in this video from :: https://controllerstech.store ________________________________________________________________________________________ To find the ID of your display goto https://github.com/prenticedavid/MCUFRIEND_kbv/blob/master/extras/mcufriend_how_to.txt STM32 Playlist :::: https://www.youtube.com/playlist?list=PLfIJKC1ud8gga7xeUUJ-bRUbeChfTOOBd DOWNLOAD THIS PROJECT FROM ::::: https://controllerstech.com/interface-tft-display-with-stm32/ NOTE:- This is a PORT from mcufriend's tft display can be found at :::: https://github.com/prenticedavid/MCUFRIEND_kbv ________________________________________________________________________________________ ******* SUPPORT US BY DONATING****** https://paypal.me/controllertech *******Join the Membership******* https://www.youtube.com/channel/UCkdqtSMnhYuMsJkyHOxiPZQ/join Join the Discord Server https://discord.gg/D32JE5wKyD
View Video Transcript
0:07
hello everyone today in this tutorial I
0:12
am going to show you guys how to
0:14
interface TFT display with stm32 this is
0:20
going to be a long ride so buckle up
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kindly pay attention to every detail
0:25
there are a lot of settings involved I
0:28
am using HX 3 4 7g display and it is 240
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by 320 TFT display as shown in the
0:38
picture before starting this tutorial I
0:41
want to mention that this is a port from
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MCU friends is arduino code I have made
0:48
some changes to make it compatible with
0:50
cube MX let's start by creating the
0:54
project in cube ide i am using stm32
1:02
f103 controller the method should work
1:08
with others too
1:09
I have tested it on F 446 and F 407
1:15
controllers okay first things first
1:20
setup the RCC and serial wire debug we
1:25
need the delay in microseconds so I am
1:28
using timer 1 to do that I am assuming I
1:32
don't need to explain this part you can
1:35
check my other video if you don't know
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how to use delay in microseconds
1:49
here comes the main part
1:52
all these TFTs have eight data pins and
1:56
five control pins it will be good for
1:59
you if you choose the port pins of any
2:02
one port from zero to seven to connect
2:04
them in the same order to the LCD data
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pins but just to show you guys how to
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program in the random cases I will
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choose some of the pins as random Here I
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am choosing pb0 and pv one and then
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three four five six to be connected in
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the same order to the LCD data pins then
2:31
pa5 to be connected to LCD d7 and P a 15
2:37
to LCD D to pin the connections are as
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follows d0 d1 d2 d3 d4 d5 d6 d7 we have
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to select five control pins also this is
2:59
for reset then C s then W R than RS and
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finally Rd is selected as input the
3:13
final setup of the pins is as shown in
3:17
the picture next complete the rest of
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the setup for the clock and once done
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just click Save
3:46
you
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now we need to copy some library files
3:53
into the project folder just follow me
4:11
[Music]
4:26
let's just refresh the project once next
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we need to include those files in our
4:38
project
4:39
[Music]
5:02
if you take a look at the functions dot
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H file these are all the functions that
5:08
you can use for the TFT
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all the modification that you are
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required to do is in the user settings
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dot H file I forgot to include the
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functions dot H file coming back to
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modification
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first of all changed the pins and ports
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according to your setup most of them are
5:57
fine let's take a look at the
6:00
connections once LCD d7 is connected to
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GPIO a5 I need to change that
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here you define the width and height of
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the LCD here you need to uncomment the
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type of display you are using I am using
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HX 8 3 4 7g so that one is defined
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microsecond delay function is defined
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here change it accordingly if you are
7:06
not using time or one here comes the
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most important part of the setup
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I have even written everything in the
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comments you can read it here we are
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going to modify the right eight function
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first we need to clear all the data pins
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and to do that we need to set the higher
7:28
bits of BSR our register for example to
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clear pins b3 before
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b8 and b9 we will write one two third
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fourth eighth and ninth position and
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shift it left sixteen times
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so in the gpio be BSS our register i am
8:06
going to write one in 0th first third
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fourth fifth and sixth positions because
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these are the GPIO B pins that are
8:17
connected to LC D data pins
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for GPIO a only pins a two and a fifteen
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are connected to the LCD data pins so
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one is only written in the fifth and
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15th position
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next we need to write data to these pins
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and to do so we will write to the lower
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bits of BS SR register here I have
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mentioned an example that if LCD d4 is
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connected to b7 and LCD d6 is connected
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to B 2 then in order to write the data
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we need to select the 4th bit of data
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because we are doing it for LCD d4 and
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then shift that bit by 3 to make it 7
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that's where the d4 is connected and
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similarly to write to the LCD d6 we will
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first select the 6th bit of data and
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this time we will shift it to the right
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by 4 that will be like subtracting and
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the final result would be 2
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that's where the d6 is connected in our
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actual case the LCD D 2 pin is connected
9:57
to a 15 so in the GPIO a BS SR register
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we need to first select the second bit
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and then shift it by 13 to make a total
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of 15 also LCD d7 is connected to a 5
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so first we will select the seventh bit
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of the data and then we need to shift
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that bit to fifth location so shifted
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right by two
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you
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next coming to GPIO be LCD d0 is
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connected to b0 pin so we don't need to
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shift it anywhere similarly other pins
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are also connected in a proper order
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so no shifting is required that's why I
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told you to choose and connect in order
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it makes things a bit easy this was the
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writing data to the pins now to read the
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value on the pins we need to read the
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input data register again I have
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mentioned an example here you can read
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it basically unlike last time where we
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selected the LCD pins first here we are
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going to select the GPIO pins first
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after selecting the GPIO pin we will
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shift it to make it equal to the LCD pin
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it is connected to you will get an idea
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of what I am talking about in a while
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let's take b0 first it is connected to
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d0 so we won't shift it
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same for the b1 also now here I have
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selected a 15 and as it is connected to
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LCD d2 I am shifting it by 13 to the
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right 15 minus 13 makes up to next b3 b4
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b5 and b6 are connected to the
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respective pins so no shifting is
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required
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now in the end I am selecting Pinay five
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and then shifting it by two in the left
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to make it seven because a five is
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connected to LCD D seven this completes
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the important part of the setup next you
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need to uncomment these lines based on
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your clock frequency
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you
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let's write the main function now I am
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defining a variable to store ID of the
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LCD
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next we need to start the timer for the
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delay to work
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[Music]
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first of all read the ID of the display
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and store it in the variable that we
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created give some delay next initialize
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the TFT with the ID then I am writing
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some tests
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[Music]
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okay print new STR prints the string in
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a row its parameters are the row number
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text color the font type that you can
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find in the fonts dot C file size of the
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text and the string itself
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and in the end I am putting the display
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in the continuous scrolling let's
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compile the code and debug it I am
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setting the live expression to monitor
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the ID so I am getting correct ID here I
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will continue the execution
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you can see all the tests being
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performed by the display
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let's put this outside the while loop
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and I will add a code to invert the
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display correct the size of the string
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also let's disable these and run the
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program again
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you
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so the things are working as expected
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this is it guys these are some more
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functions that you can use for now some
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of them are in TFT dot H file I hope you
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will get yours working too I will make
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another video for the TFT displays that
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use SPI this code might have some errors
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at the moment I didn't test it
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thoroughly yet you can download the code
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from the link in the description
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you