RTOS/MSP430FR5994: Need to use multiple uarts with Launchpad

Frank Chambers

Part Number: MSP430FR5994

Tool/software: TI-RTOS

I am tryuing to use uart0 as intended and to add the use of uartA3, P6.0,6.1 to communicate with another processor. I searched this forum and found an example for another pocessor that added in the additional uart. The esxample is old and some adjustments had to be mad. I did them and found that uartA0 still works but uartA3 does not. The error appears to be an unimitialized variable somewhere in the heirarchy. To simplify things I tried to convert the uartecho example from UARTA) to UART A3. When I do this I get a message on program load that states "Received exception from ROV server: Target memory read failed at address 0xffffffff length 128. This read is at an INVALID addreess according to the application map.. The application is likely either uninitialized or corrupt."

I believe that I have missed something in the conversion but cannot find it.

I am using CCSV7 and tirtos_msp43x_2_20_00_06. All the changes were made to the base uartecho example which does work.

The changes I made are below. Any help would be appreciuated. Thanks

msp430fr5994.h

#ifdef __ASM_HEADER__ /* Begin #defines for assembler */
#define EUSCI_A3_VECTOR ".int24" /* 0xFFC0 */
#else
#define EUSCI_A3_VECTOR (24 * 1u) /* 0xFFC0 */
#endif

#ifdef __ASM_HEADER__ /* Begin #defines for assembler */
#define EUSCI_A0_VECTOR ".int48" /* 0xFFF0 */
#else
#define EUSCI_A0_VECTOR (48 * 1u) /* 0xFFF0 */
#endif

Board.h

#define Board_UART3 MSP_EXP430FR5994_UARTA3

uartechoA3B.c

/* Create a UART with data processing off. */
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 = 9600;
uart = UART_open(Board_UART3, &uartParams);

uartechoA3B.cfg

var hwiParams = new halHwi.Params();

hwiParams.arg = 0;
halHwi.create(24, "&UARTEUSCIA_hwiIntFxn", hwiParams);

MSP_EXP430FR5994.c

/*
* =============================== UART ===============================
*/
/* Place into subsections to allow the TI linker to remove items properly */
#if defined(__TI_COMPILER_VERSION__)
#pragma DATA_SECTION(UART_config, ".const:UART_config")
#pragma DATA_SECTION(uartEUSCIAHWAttrs, ".const:uartEUSCIAHWAttrs")
#endif

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

UARTEUSCIA_Object uartEUSCIAObjects[MSP_EXP430FR5994_UARTCOUNT];

/*
* The baudrate dividers were determined by using the MSP430 baudrate
* calculator
* software-dl.ti.com/.../index.html
*/
const UARTEUSCIA_BaudrateConfig uartEUSCIABaudrates[] = {
/* {baudrate, input clock, prescalar, UCBRFx, UCBRSx, oversampling} */
{
.outputBaudrate = 115200,
.inputClockFreq = 8000000,
.prescalar = 4,
.hwRegUCBRFx = 5,
.hwRegUCBRSx = 85,
.oversampling = 1
},
{9600, 8000000, 52, 1, 0, 1},
{9600, 32768, 3, 0, 3, 0},
};

const UARTEUSCIA_HWAttrs uartEUSCIAHWAttrs[MSP_EXP430FR5994_UARTCOUNT] = {
{
.baseAddr = EUSCI_A3_BASE,
.clockSource = EUSCI_A_UART_CLOCKSOURCE_SMCLK,
.bitOrder = EUSCI_A_UART_LSB_FIRST,
.numBaudrateEntries = sizeof(uartEUSCIABaudrates)/sizeof(UARTEUSCIA_BaudrateConfig),
.baudrateLUT = uartEUSCIABaudrates
},
};

const UART_Config UART_config[] = {
{
.fxnTablePtr = &UARTEUSCIA_fxnTable,
.object = &uartEUSCIAObjects[0],
.hwAttrs = &uartEUSCIAHWAttrs[0]
},
{NULL, NULL, NULL}
};

/*
* ======== MSP_EXP430FR5994_initUART ========
*/
void MSP_EXP430FR5994_initUART(void)
{
/* P6.0,1 = EUSCI_A3 TXD/RXD */
GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P6,
GPIO_PIN0, GPIO_SECONDARY_MODULE_FUNCTION);
GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P6,
GPIO_PIN1, GPIO_SECONDARY_MODULE_FUNCTION);

/* Initialize the UART driver */
UART_init();
}

MSP_EXP430FR5994.h

typedef enum MSP_EXP430FR5994_UARTName {
MSP_EXP430FR5994_UARTA3 = 0,

MSP_EXP430FR5994_UARTCOUNT
} MSP_EXP430FR5994_UARTName;

over 8 years ago

0 Gerardo Gomez Martinez over 8 years ago

TI__Expert 5825 points

Hi Frank,

Do you think you could share your project so I can take a better look at this?

Thanks,
Gerardo

0 Gerardo Gomez Martinez over 8 years ago in reply to Gerardo Gomez Martinez

TI__Expert 5825 points

Frank,

I think I have an idea why your UART may not be working, on your MSP_EXP430FR5994_initUART when you call GPIO_setAsPeripheralModuleFunctionOutputPin() you should set the mode to GPIO_PRIMARY_MODULE_FUNCTION for P6.0 & P6.1, as such:

GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P6,
    GPIO_PIN0, GPIO_PRIMARY_MODULE_FUNCTION);
GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P6,
    GPIO_PIN1, GPIO_PRIMARY_MODULE_FUNCTION);

Thanks,
Gerardo

0 Frank Chambers over 8 years ago in reply to Gerardo Gomez Martinez

Intellectual 410 points

Gerado,

Thanks for your quick response. Unfortunately, even though selecting the PRIMARY function certainly needed to be done there must be something else as well as I still get the same error message in ROV on program load and initialization.

I have zipped up the project and at5518.uartecho_MSP_EXP430FR5994_TIA3B.ziptached it as you requested in your previous reply.

0 Gerardo Gomez Martinez over 8 years ago in reply to Frank Chambers

TI__Expert 5825 points

Frank,

Did you modify msp430fr5994.h?

Thanks,
Gerardo

0 Frank Chambers over 8 years ago in reply to Gerardo Gomez Martinez

Intellectual 410 points

No, I do not believe so. If I did it was inadvertent. I did have the file open as that is where I find the interrupt numbers. As a check can you send me a clean copy? I can then check mine against it with winmerge. The file date on msp430fr5994.h in C:\ti\ccsv7\ccs_base\msp430\include is the same as all the others, 11/23/2016 so I expect that no changes were made.

Thanks

Frank

0 Gerardo Gomez Martinez over 8 years ago in reply to Frank Chambers

TI__Expert 5825 points

Frank,

That should be OK then. I suggest starting from the UART echo example again and doing the following. Import the UART echo example and make sure it builds. Then do the following modifications:

Change on MSP_EXP430FR5994.c

const UARTEUSCIA_HWAttrs uartEUSCIAHWAttrs[MSP_EXP430FR5994_UARTCOUNT] = {
    {
        .baseAddr = EUSCI_A3_BASE,
        .clockSource = EUSCI_A_UART_CLOCKSOURCE_SMCLK,
        .bitOrder = EUSCI_A_UART_LSB_FIRST,
        .numBaudrateEntries = sizeof(uartEUSCIABaudrates)/sizeof(UARTEUSCIA_BaudrateConfig),
        .baudrateLUT = uartEUSCIABaudrates
    },
};

and

void MSP_EXP430FR5994_initUART(void)
{
    /* P2.0,1 = EUSCI_A0 TXD/RXD */
    GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P6,
        GPIO_PIN0, GPIO_PRIMARY_MODULE_FUNCTION);
    GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P6,
        GPIO_PIN1, GPIO_PRIMARY_MODULE_FUNCTION);

    /* Initialize the UART driver */
    UART_init();
}

Change on MSP_EXP430FR5994.h

typedef enum MSP_EXP430FR5994_UARTName {
    MSP_EXP430FR5994_UARTA3 = 0,

    MSP_EXP430FR5994_UARTCOUNT
} MSP_EXP430FR5994_UARTName;

Change on Board.h

#define Board_UART3                 MSP_EXP430FR5994_UARTA3

Change on uartecho.cfg

halHwi.create(24, "&UARTEUSCIA_hwiIntFxn", hwiParams);

Change on uartecho.c

uart = UART_open(Board_UART3, &uartParams);

That's what I did to get UART 3 to echo.

Let me know if that works,
Gerardo

0 Frank Chambers over 8 years ago in reply to Gerardo Gomez Martinez

Intellectual 410 points

Gerado,

This works. Thank you very much. I investigated what might have been wrong with my previous program, still don't know as I had made all of the changes above and it still failed. I have done a number of hardware software/ projects and my experience tells me that it is almost never the hardware. In thus case mixed results. Something was wrong with P6 1 and 0 on the board that I was using. The last piece that had to fall into place was using a fresh board. Thar being said, the version that I checked against yours still fails, yours doesn't. I will use this as the basis for the code that I really need to write.

Thanks again.

Frank

0 Gerardo Gomez Martinez over 8 years ago in reply to Frank Chambers

TI__Expert 5825 points

Frank,

Yea I tried to import your program and I was having some issues with it that's why I decided to start from the example again. I did diff your files to what I had and it was almost the same so at the moment I can't really explain what was wrong there. But I'm glad you have a working project now.

Thanks,
Gerardo

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RTOS/MSP430FR5994: Need to use multiple uarts with Launchpad