Compiler/CC3220SF-LAUNCHXL: Uart_open() fail

Mark81

Part Number: CC3220SF-LAUNCHXL
Other Parts Discussed in Thread: CC3220SF

Tool/software: TI C/C++ Compiler

Playing for the first time with the TI C compiler, I'm trying to set up the UART like in some examples.
I also read the documentation about UART functions but I still have a problem.

When I call Uart_open() it returns NULL - hence it fails. The code is VERY simple and I'm running it on the CC3220SF-LAUNCHXL board.

int main(void)
{
    static UART_Handle uartHandle;

    PRCMCC3200MCUInit();
    Power_init();
    GPIO_init();

    UART_Params uartParams;

    UART_init();
    UART_Params_init(&uartParams);

    uartParams.writeDataMode    = UART_DATA_BINARY;
    uartParams.readDataMode     = UART_DATA_BINARY;
    uartParams.readReturnMode   = UART_RETURN_FULL;
    uartParams.readEcho         = UART_ECHO_OFF;
    uartParams.baudRate         = 115200;

    uartHandle = UART_open(Board_UART0, &uartParams);
    if (uartHandle == NULL) {
        GPIO_write(Board_GPIO_LED_RED, 1);
        for (;;) {}
    }
}

Here the configuration of the board:

typedef enum CC3220SF_LAUNCHXL_UARTName {
    CC3220SF_LAUNCHXL_UART0 = 0,
    CC3220SF_LAUNCHXL_UART1,

    CC3220SF_LAUNCHXL_UARTCOUNT
} CC3220SF_LAUNCHXL_UARTName;

#define Board_UART0               CC3220SF_LAUNCHXL_UART0

#include <ti/drivers/UART.h>
#include <ti/drivers/uart/UARTCC32XX.h>

UARTCC32XX_Object uartCC3220SObjects[CC3220SF_LAUNCHXL_UARTCOUNT];
unsigned char uartCC3220SRingBuffer[CC3220SF_LAUNCHXL_UARTCOUNT][32];

const UARTCC32XX_HWAttrsV1 uartCC3220SHWAttrs[CC3220SF_LAUNCHXL_UARTCOUNT] = {
    {
        .baseAddr = UARTA0_BASE,
        .intNum = INT_UARTA0,
        .intPriority = (~0),
        .flowControl = UARTCC32XX_FLOWCTRL_NONE,
        .ringBufPtr  = uartCC3220SRingBuffer[CC3220SF_LAUNCHXL_UART0],
        .ringBufSize = sizeof(uartCC3220SRingBuffer[CC3220SF_LAUNCHXL_UART0]),
        .rxPin = UARTCC32XX_PIN_57_UART0_RX,
        .txPin = UARTCC32XX_PIN_55_UART0_TX,
        .ctsPin = UARTCC32XX_PIN_UNASSIGNED,
        .rtsPin = UARTCC32XX_PIN_UNASSIGNED
    },
    {
        .baseAddr = UARTA1_BASE,
        .intNum = INT_UARTA1,
        .intPriority = (~0),
        .flowControl = UARTCC32XX_FLOWCTRL_NONE,
        .ringBufPtr  = uartCC3220SRingBuffer[CC3220SF_LAUNCHXL_UART1],
        .ringBufSize = sizeof(uartCC3220SRingBuffer[CC3220SF_LAUNCHXL_UART1]),
        .rxPin = UARTCC32XX_PIN_08_UART1_RX,
        .txPin = UARTCC32XX_PIN_07_UART1_TX,
        .ctsPin = UARTCC32XX_PIN_UNASSIGNED,
        .rtsPin = UARTCC32XX_PIN_UNASSIGNED
    }
};

const UART_Config UART_config[CC3220SF_LAUNCHXL_UARTCOUNT] = {
    {
        .fxnTablePtr = &UARTCC32XX_fxnTable,
        .object = &uartCC3220SObjects[CC3220SF_LAUNCHXL_UART0],
        .hwAttrs = &uartCC3220SHWAttrs[CC3220SF_LAUNCHXL_UART0]
    },
    {
        .fxnTablePtr = &UARTCC32XX_fxnTable,
        .object = &uartCC3220SObjects[CC3220SF_LAUNCHXL_UART1],
        .hwAttrs = &uartCC3220SHWAttrs[CC3220SF_LAUNCHXL_UART1]
    }
};

const uint_least8_t UART_count = CC3220SF_LAUNCHXL_UARTCOUNT;

Please, would you help me to understand why it fails?

over 7 years ago

0 made4engineering over 7 years ago

TI__Mastermind 27450 points

At a glance it seems okay, but try running the (nortos) power_measurement example since it has the configuration your want.

-Aaron

0 Mark81 over 7 years ago in reply to made4engineering

Expert 2610 points

My code was derived exactly from the power_measurement example! And it works.
But to deeper understand this new platform I tried to setup a new project from scratch, adding the code to configure the UART.

Perhaps I forgot something?

0 Mark81 over 7 years ago in reply to Mark81

Expert 2610 points

Found the problem: it was the .cmd file. Here the one generated by CCS:

--retain=g_pfnVectors
--retain=ulDebugHeader

#define FLASH_BASE 0x01000800
#define FLHDR_BASE 0x01000000

MEMORY
{
    /* Application uses internal RAM for program and data */
    FLASH_HDR	(RX)  : origin = 0x01000000, length = 0x7FF    /* 2 KB */
    FLASH_CODE  (RX)  : origin = 0x01000800, length = 0x0FF800 /* 1022KB */
    SRAM_DATA   (RWX) : origin = 0x20000000, length = 0x040000 /* 256KB */
}

SECTIONS
{
    .dgbhdr     	  : > FLHDR_BASE
    .resetVecs            : > FLASH_BASE
    .init_array           : > FLASH_CODE
    .text                 : > FLASH_CODE
    .const                : > FLASH_CODE
    .cinit                : > FLASH_CODE
    .pinit                : > FLASH_CODE
    .ramvecs              : > SRAM_DATA ALIGN(1024)
    .data                 : > SRAM_DATA
    .bss                  : > SRAM_DATA
    .sysmem               : > SRAM_DATA
    .stack                : > SRAM_DATA(HIGH)
}

and here the one of the example:

--stack_size=0x1000
--heap_size=0x8000

#define SRAM_BASE   0x20000000
#define FLASH_BASE  0x01000800

MEMORY
{
    /* Bootloader uses FLASH_HDR during initialization */
    FLASH_HDR (RX)  : origin = 0x01000000, length = 0x7FF      /* 2 KB */
    FLASH     (RX)  : origin = 0x01000800, length = 0x0FF800   /* 1022KB */
    SRAM      (RWX) : origin = 0x20000000, length = 0x00040000 /* 256KB */
}

SECTIONS
{
    .dbghdr     : > FLASH_HDR
    .text       : > FLASH
    .TI.ramfunc : {} load=FLASH, run=SRAM, table(BINIT)
    .const      : > FLASH
    .cinit      : > FLASH
    .pinit      : > FLASH
    .init_array : > FLASH

    .data       : > SRAM
    .bss        : > SRAM
    .sysmem     : > SRAM
    .stack      : > SRAM(HIGH)

    .resetVecs  : > FLASH_BASE
    .ramVecs    : > SRAM_BASE, type=NOLOAD
}

They are quite different!
What document I should read to understand how to write the correct cmd file?

0 made4engineering over 7 years ago in reply to Mark81

TI__Mastermind 27450 points

Hi Mark,

It's not expected to write your own usually. If you want to know where all of this comes from you will need to read the cc3220 TRM, and take a look at this: processors.wiki.ti.com/.../Linker_Command_File_Primer

-Aaron

0 Mark81 over 7 years ago in reply to made4engineering

Expert 2610 points

I will.
Because the command files are so different between the dev board and the "plain" MCU I'm afraid about my own board based upon CC3220SF

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Compiler/CC3220SF-LAUNCHXL: Uart_open() fail