Hello,
I have a small questions about using rotary encoder with DA14531.
How to choose the right type of encoder?
What parameters to pay attention to?
Whether this encoder will work with the built-in decoder (pdf in attachment)? I wrote a simple program and it counts impulses wrong (e.g. 12 24 36)
Sample code here:
void quad_decoder_user_callback_function(int16_t qdec_xcnt_reg, int16_t qdec_ycnt_reg, int16_t qdec_zcnt_reg) { arch_printf( "\n\r DX: "); arch_printf( "%i %i\n\r",qdec_xcnt_reg >> 8,qdec_xcnt_reg & 0xFF); quad_decoder_enable_irq(1); } void quad_decoder_init_enc(void){ QUAD_DEC_INIT_PARAMS_t quad_dec_init_param = {.chx_port_sel = QUAD_DEC_CHXA_P08_AND_CHXB_P09, .chy_port_sel = QUAD_DEC_CHYA_NONE_AND_CHYB_NONE, .chz_port_sel = QUAD_DEC_CHZA_NONE_AND_CHZB_NONE, .qdec_clockdiv = 0, .qdec_events_count_to_trigger_interrupt = 1,}; quad_decoder_init(&quad_dec_init_param); quad_decoder_register_callback(quad_decoder_user_callback_function); quad_decoder_enable_irq(1); }
Attachment:
Device:
Hi adam.stroz,
Please check the DA14531 datasheet Table 3: Absolute Maximum Ratings and Table 4: Recommended Operating Conditions. Given that the encoder can be connected to any of the DA4531 pins, you should check that the output of the input channels are according to DA14531 pin specifications.
I would recommend first checking theUM-B-119: DA14585-DA14531 SW Platform Referenceand section 5.10. Quadrature Decoder Example. Are you able to run the SDK example? Take a look at Table 15 HDK jumper configuration Quadrature decoder.
Thanks, PM_Dialog
Hello,
是的我跑这个例子,它还显示坏的价值es. I run the program on my custom PCB, here are sample readings (the message is sent after turning the encoder by 4 steps, not one as it should be)
Hi adam.stroz,
Can you please indicate the pinout that you are using? Is it P06 (CHX_A) and P05 (CHX_B)? Did you try to run it in our DK to check if there is any difference?
Thanks, PM_Dialog
Currently i'm using this pinout:
What do you mean by " Did you try to run it in our DK to check if there is any difference?"
Diagram in attachment.
Hi adam.stroz,
Sorry for the confusion – I meant to put the encoder on the Pro-DK and test it. I assume that you have a custom board.
Can you please use a clean quadrature_decoder project as provided by the SDK and do only the following modifications? The P08 is used for the UART2.
Project location : 6.0.14.1114\projects\target_apps\peripheral_examples\quadrature_decoder\Keil_5
In user_periph_setup.h :
Thanks, PM_Dialog
I tested your proposition (a clean quadrature_decoder example, i change only encoder and uart pins), and encoder still doesn't work properly... I see an event only when turn (left or right) encoder four times (sometimes after one turn). In attachment oscilloscope diagrams (A and B encoder pins on blue and yellow lines, the first picture shows first turn, second pictures shows next turns). Maybe i have the wrong type of encoder?
Hi adam.stroz,
Thanks for coming and posting to the forums. Exciting news! We’re now in the process of moving to our new forum platform that will offer better functionality and is contained within the main Dialog website. All posts and accounts have been migrated. We’re now accepting traffic on the NEW forum only - please POST any new threads at//www.xmece.com/support
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This ticket has been posted on ://www.xmece.com/products/bluetooth-low-energy?post_id=11435#tab-support_tab_content
Your last comment is not sync-up, so I’ll create a copy (with the attachment) on behalf of you.
I’ll respond to you as soon as possible on the NEW forum thread.
Thanks, PM_Dialog