STM32L053R8T6 segment LCD

[arpad]

Posted on June 15, 2015 at 16:33

Dear Forumers,

Can you help me, how to control a 4x18 (com x seg; direck control) costum design LCD?

I searched a lot, but i found mostly graphical LCD-s.

Maybe an example?

Thanks!

#segment-lcd #the-stm32l0-series-embeds-the-sa

[Tesla DeLorean]

Posted on June 15, 2015 at 16:38

Does this custom LCD have a part number or a data sheet/manual?

[arpad]

Posted on June 15, 2015 at 16:48

Yes, init is complete.

3.3V; 1/4 duty; 1/3 bias

pinmap & segments:

xA,xB...xG -- 4x7 segments

</colgroup>

PIN COM1 COM2 COM3 COM4

S1 Y2 Y3 Y10

2 S2 Y1 Y4 Y9

3 S3 S6 Y5 Y8

4 S4 S5 Y6 Y7

5 X1 1F 1E Y11

6 1A 1G 1D Y12

7 1B 1C Y13

8 X2 2F 2E Y14

9 2A 2G 2D Y15

10 X3 2B 2C Y16

11 COL DP Y17

12 X4 3F 3E Y18

13 3A 3G 3D Y19

14 3B 3C Y20

15 X5 4F 4E Y21

16 4A 4G 4D Y22

17 X6 4B 4C Y23

18 X7 S7 S8 Y24

19 COM1

20 COM2

21 COM3

22 COM4

[l239955_stm1]

Posted on June 17, 2015 at 08:22

Hi, look at the STM32Cube_FW_L0/Projects/STM32L053R8-Nucleo/Examples/LCD, there is an example how to control segment LCD. In my case of large segment LCD (about 180 segments) I used LCD driver PCF85176. It´s control by I2C

[arpad]

Posted on June 17, 2015 at 09:16

Thanks for the reply, but i want to use a naked LCD without an external driver.

[waclawek.jan]

Posted on June 17, 2015 at 10:21

According to AN4654, ''L1->L0 migration'':

The STM32L0 series embeds the same LCD peripheral like in the STM32L1 series but there was extended number of segments.

 

Thus, you should be able to use whatever is available for 'L1.

They are also pin-compatible. What I'd do is that I'd buy an L1-DISCO (it contains an LCD) and exchange the chip and play.

JW