FPGA GPIO Gateware Usage

[bluetiger9]

Hi!

I'm trying to use freertos_gateware/eoss3_hal_fpga_gpio.h api from qork-sdk.

The eoss3_hal_fpga_gpio.h is similar to eoss3_hal_fpga usbserial.h, but there looks to be no FPGA bitstream image for it. _(the FPGA bitstream is located in s3-gateware/usb2serial/src/usb2serial_bit.h in case of usb serial)_

I tried to use eoss3_hal_fpga_gpio.h it without loading an FPGA image, but I get a hard-fault when calling HAL_FB_GPIO_Write:

**hardfault**
r0: 0x00000015
r1: 0x00000000
r2: 0x40020000
r3: 0x00000001
r12: 0x00000000
lr: 0x00002453
pc: 0x00000dca
SP: 0x01000000
stackdump x256
...

Could you provide some instructions on how this eoss3_hal_fpga_gpio.h should be used?

Note:

• I'm trying to use FPGA GPIO with Pad 2, configured as follows

        { // IO_2 / FBIO(2)
          .ucPin = PAD_2,
          .ucFunc = PAD2_FUNC_SEL_FBIO_2,
          .ucCtrl = PAD_CTRL_SRC_FPGA,
          .ucMode = PAD_MODE_OUTPUT_EN,
          .ucPull = PAD_NOPULL,
          .ucDrv = PAD_DRV_STRENGTH_4MA,
          .ucSpeed = PAD_SLEW_RATE_SLOW,
          .ucSmtTrg = PAD_SMT_TRIG_DIS,
        },

• I'm calling HAL_FB_GPIO_Write(FB_GPIO_21, 0/1) with:

  #define FB_GPIO_21      21        // PAD2          //  PAD[2]     

Thanks, Attila