LP-AM243: How PRU0/1 to access or read the Register of ICSS_G?

Shaoxing Ke

Part Number: LP-AM243

Hi Champs,

I am asking for customer here!

Like we can use the address offset to access the Register of ICSS_G by R5F, but how PRU0/1 to access or read the Register of ICSS_G?

For example, the below code is R5F access the MDIO_CONTROL_REG. But we want to use PRU0/1 to read the ICSS_G status(Such as MII_RT_CFG). Could you give me some suggestion?

HW_WR_REG32(CSL_PRU_ICSSG0_PR1_MDIO_V1P7_MDIO_BASE + CSL_MDIO_CONTROL_REG, 0x410000FF);

over 2 years ago

0 Frank Livingston over 2 years ago

TI__Mastermind 29348 points

Hi Shaoxing,

For C code, you can continue to use the HW_WR_REGx and HW_RD_REGx macros defined in <SDK>/source/drivers/hw_include/hw_types.h. However, use CSL_ICSS_G_PR1_MDIO_V1P7_MDIO_REGS_BASE in place of CSL_PRU_ICSSG0_PR1_MDIO_V1P7_MDIO_BASE:

R5F uses SOC address: <SDK>/source/drivers/hw_include/am64x_am243x/cslr_soc_baseaddress.h:493:#define CSL_PRU_ICSSG0_PR1_MDIO_V1P7_MDIO_BASE (0x30032400UL)
PRU uses ICSSG local: <SDK>/source/drivers/pruicss/g_v0/cslr_icss_g.h:59:#define CSL_ICSS_G_PR1_MDIO_V1P7_MDIO_REGS_BASE (0x00032400U)

PRU-IO shows how this can be done in assembly language:

a template assembly file is located in <SDK>\examples\pru_io\empty\firmware\main.c
MDIO macros are contained in <SDK>/source/pru_io/firmware/common/mdio_macros.inc.

Regards,
Frank

0 Shaoxing Ke over 2 years ago in reply to Frank Livingston

TI__Expert 3590 points

Hello Frank,

Maybe it is not work for me as to the

PRU uses ICSSG local: <SDK>/source/drivers/pruicss/g_v0/cslr_icss_g.h:59:#define CSL_ICSS_G_PR1_MDIO_V1P7_MDIO_REGS_BASE (0x00032400U)

So doubt that any missing things in customer's project? do we need to Initialize IEP? Could I sent the project to you, go through to find the issue? Thanks.