RTOS/TDA2P-ACD: Supporting UART4 on custom board based on TDA2PX

Hrishikesh Rajurkar

Part Number: TDA2P-ACD
Other Parts Discussed in Thread: SYSBIOS

Tool/software: TI-RTOS

Hello All,

We are working on TDA2Px based custom board sysbios all configuration and PSDK3.03.

In the board UART4 is used for interfacing with one of the sensor. To initialize UART4 instance following changes are done in the PSDK code base

1. Added UART4 instance in bsp_boardTda2pxDefault.h as follows

{                                                                    \
            BSP_DRV_ID_UART,                               /* devDrvId */    \
            BSP_DEVICE_UART_INST_ID_3,                     /* instId */      \
            NULL,                                          /* i2cInstId */   \
            NULL,                                          /* i2cAddr */     \
            NULL,                                          /* drvId */       \
            NULL,                                          /* drvInstId */   \
            &Bsp_boardSelectDeviceTda2xx,                  /* selectDev */   \
            NULL,                                          /* resetDev */    \
            NULL,                                          /* powerOnDev */ \
        },

2. Updated pin muxing based on the board schematic

3.In code for initializing UART4 following sequence is added (based on example ti_components/drivers/pdk_01_09_00_17/packages/ti/drv/bsp_lld/uart/examples/uart_echo)

GIO_addDevice(uartDeviceName1, (Ptr)&Uart_IOMFXNS, NULL,
                  uartDevId, (xdc_Ptr) & uartParams); where uartDeviceName1 is uart4

       Bsp_boardSetPinMux( BSP_DRV_ID_UART,BSP_DEVICE_UART_INST_ID_3,BSP_BOARD_MODE_DEFAULT);
       Bsp_boardSelectDevice(BSP_DRV_ID_UART, uartDevId);

Uart4RxHandle = GIO_create(uartDeviceName1, (UInt32)GIO_INPUT,&ioParams, &eb);

while it is executing the GIO_addDevice and pin mux call without any error, but executing GIO_create results in a crash on ipu1_0.

On debugging further, I have found that it is crashing at the point when it tries to execute UARTEnhanFuncEnable() for SOC_UART4_BASE (0x4806E000) giving hard fault error.

As per my understanding this type of error comes when IPU tries to access non mapped memory region.

Please let me know if i am missing anything here.

regards

Hrishikesh

over 7 years ago

0 Rishabh Garg over 7 years ago

TI__Guru 55685 points

Hi Hrishikesh,

Can you check if UART4 is powered on (CM_L4PER_UART4_CLKCTRL 0x4A009858)?

Regards,
Rishabh

0 Hrishikesh Rajurkar over 7 years ago in reply to Rishabh Garg

Expert 1165 points

Hi Rishabh
Thanks for quick reply, will you please let me know the ideal place to call /* Enable module */
HW_WR_REG32(
SOC_L4PER_CM_CORE_BASE + CM_L4PER_UART4_CLKCTRL, PRCM_ENABLE);
while ((HW_RD_REG32(SOC_L4PER_CM_CORE_BASE +
CM_L4PER_UART4_CLKCTRL) & ((UInt32) (0x00030000)))
!= 0x0)
{
/* Do nothing - Busy wait */
}
functionality from VSDK, in bsp_boardtda2xx.c ?
regards
Hrishikesh

0 Rishabh Garg over 7 years ago in reply to Hrishikesh Rajurkar

TI__Guru 55685 points

Hi Hrishikesh,

You can call it anywhere in the application. If you want to add it in board you can add it to Bsp_boardSelectDevice.

Regards,
Rishabh

0 Hrishikesh Rajurkar over 7 years ago in reply to Rishabh Garg

Expert 1165 points

Hi Rishabh,

I have called this functionality from bsp_boardtda2xx.c where it executed without any error, but when I checked the location 0x4806e000 from memory browser it was showing as non accessible memory. Please find attached screenshot. And when line UARTEnhanFuncEnable() was being executed from function uartConfigure() in file bspdrv_uart.c it crashed giving following errors

ti.sysbios.family.arm.m3.Hwi: line 1105: ti.sysbios.family.arm.m3.Hwi: line 1105: E_hardFault: FORCED

ti.sysbios.family.arm.m3.Hwi: line 1182: ti.sysbios.family.arm.m3.Hwi: line 1182: E_busFault: PRECISERR: Immediate Bus Fault, exact addr known, address: 4806e00c

Exception occurred in background thread at PC = 0x82e47ba8.

Core 0: Exception occurred in ThreadType_Task.

Please let me know if i miss anything

regards

Hrishikesh

0 Rishabh Garg over 7 years ago in reply to Hrishikesh Rajurkar

TI__Guru 55685 points

Hi,

What is the value of register CM_L4PER_UART4_CLKCTRL 0x4A009858? Can you try to access this via 0x6xxx_xxxx page?

Regards,
Rishabh

0 Hrishikesh Rajurkar over 7 years ago in reply to Rishabh Garg

Expert 1165 points

Hi,
The value of CM_L4PER_UART4_CLKCTRL 0x4A009858 is 0x00030000 same value is seen when i entered memory location Ox6a009858. For the memory location 0x4806 e000 the memory browser show ?? which is similar to when memory location is entered as 0x6806 e000 .
regards
Hrishikesh

0 Rishabh Garg over 7 years ago in reply to Hrishikesh Rajurkar

TI__Guru 55685 points

Hi Hrishikesh,

Can you set CM_L4PER_UART4_CLKCTRL 0x4A009858 to 0x2 and then try.

Regards,
Rishabh

0 Hrishikesh Rajurkar over 7 years ago in reply to Rishabh Garg

Expert 1165 points

Hi Rishabh,
After changing the value 0x4A009858 to 0x2 using memory browser ,it did not crash and it had created the uart handle for uart4 .
The memory for uart4 instance 0x4806e000 also became accessible in CCS. how to make it permantly in code base?
regards
Hrishikesh

0 Rishabh Garg over 7 years ago in reply to Hrishikesh Rajurkar

TI__Guru 55685 points

Hi Hrishikesh,

As I mentioned in my first post this write powers on UART4 in PRCM.
I think the code you had shared earlier is not correct.
Just see the TRM and update the code.
Alternatively you can use PM API PMHALModuleModeSet as well.

Regards,
Rishabh

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RTOS/TDA2P-ACD: Supporting UART4 on custom board based on TDA2PX