How to connect JBL interface to Sharp screen

Troubleshooting
1

There is a JBL screen interface in the SF32LB52, but I want to connect a Sharp screen. I’d like to ask how to connect it.

2

You can refer to the 52x chip datasheet on our wiki website to locate the pins supporting the LCDC1_JDI_XXX related functions, then find the corresponding physical pins on the development board, connect them to the Sharp display, and finally modify the relevant code.

3

May I ask which pin the VCOM of the 52x JDI is connected to, and which pins the GEN and INTB of the Sharp are connected to?

4

The naming might differ, but our pinmux naming is consistent with this diagram.

According to the Sharp JDI manual I have and by cross-referencing this timing diagram, GEN should correspond to ENB, and INTB should correspond to XRST.

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As for VCOM, it is directly connected to a PWM output (shared with one of FRP/XFRP) and is not part of the LCDC pinmux. The sf32lb52-lcd_n16r8_jdi board contains the relevant pinmux configuration, using lppwm2 as the output.

config JDI_FRP_LPPWM_INTERFACE_NAME
    string
    default "pwmlp2"

    HAL_PIN_Set(PAD_PA24, PBR_LPTIM2_OUT, PIN_NOPULL, 1);  //FRP
    HAL_PIN_Set(PAD_PA25, PBR_LPTIM2_INV_OUT, PIN_NOPULL, 1);  //XFRP