LPC54114: Barebones program held up on BOARD_InitBootPeripherals()

[mbressler]

Trying to get my LPC54114 to talk to a RS485 driver and my program seems to be hanging right at the BOARD_InitBootPeripherals() method created by the MCUXpresso peripherals tool.

I started with a new project that ran perfectly (the default PRINTF("Hello World\n") that is included in new projects but when I made the changes in the peripheral tools which auto generated code in BOARD_InitBootPeripherals() the program now blocks on the BOARD_InitBootPeripherals() method and the program never reaches the PRINTF.

Commenting out the method allows the program to continue normally.

LPC54114J256_RS485.cpp

#include <stdio.h>
#include "board.h"
#include "peripherals.h"
#include "pin_mux.h"
#include "clock_config.h"
#include "LPC54114_cm4.h"
#include "fsl_debug_console.h"

uint8_t data[] {0x53, 0x7f};


/*
 * @brief   Application entry point.
 */
int main(void) {

       /* Init board hardware. */
    BOARD_InitBootPins();
    BOARD_InitBootClocks();
    BOARD_InitBootPeripherals();
       /* Init FSL debug console. */
    BOARD_InitDebugConsole();

    PRINTF("Hello World\n");

    /* Force the counter to be placed into memory. */
    volatile static int i = 0 ;
    /* Enter an infinite loop, just incrementing a counter. */
    while(1) {
        i++ ;
    }
    return 0 ;
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

board/peripherals.c

/***********************************************************************************************************************
 * This file was generated by the MCUXpresso Config Tools. Any manual edits made to this file
 * will be overwritten if the respective MCUXpresso Config Tools is used to update this file.
 **********************************************************************************************************************/

/* clang-format off */
/* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
!!GlobalInfo
product: Peripherals v4.1
processor: LPC54114J256
package_id: LPC54114J256BD64
mcu_data: ksdk2_0
processor_version: 4.0.0
board: LPCXpresso54114
functionalGroups:
- name: BOARD_InitPeripherals
  called_from_default_init: true
  selectedCore: cm4
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS **********/

/* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
component:
- type: 'system'
- type_id: 'system_54b53072540eeeb8f8e9343e71f28176'
- global_system_definitions: []
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS **********/
/* clang-format on */

/***********************************************************************************************************************
 * Included files
 **********************************************************************************************************************/
#include "peripherals.h"

/***********************************************************************************************************************
 * BOARD_InitPeripherals functional group
 **********************************************************************************************************************/
/***********************************************************************************************************************
 * RS485_UART initialization code
 **********************************************************************************************************************/
/* clang-format off */
/* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
instance:
- name: 'RS485_UART'
- type: 'flexcomm_usart'
- mode: 'polling'
- type_id: 'flexcomm_usart_fcc110cc6b16332e9dfd9e0df675e21f'
- functional_group: 'BOARD_InitPeripherals'
- peripheral: 'FLEXCOMM2'
- config_sets:
  - usartConfig_t:
    - usartConfig:
      - clockSource: 'FXCOMFunctionClock'
      - clockSourceFreq: 'GetFreq'
      - baudRate_Bps: '9600'
      - parityMode: 'kUSART_ParityDisabled'
      - stopBitCount: 'kUSART_OneStopBit'
      - bitCountPerChar: 'kUSART_8BitsPerChar'
      - loopback: 'false'
      - txWatermark: 'kUSART_TxFifo0'
      - rxWatermark: 'kUSART_RxFifo1'
      - enableRx: 'true'
      - enableTx: 'true'
    - quick_selection: 'QuickSelection5'
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS **********/
/* clang-format on */
const usart_config_t RS485_UART_config = {
  .baudRate_Bps = 9600,
  .parityMode = kUSART_ParityDisabled,
  .stopBitCount = kUSART_OneStopBit,
  .bitCountPerChar = kUSART_8BitsPerChar,
  .loopback = false,
  .txWatermark = kUSART_TxFifo0,
  .rxWatermark = kUSART_RxFifo1,
  .enableRx = true,
  .enableTx = true
};

void RS485_UART_init(void) {
  /* Reset FLEXCOMM device */
  RESET_PeripheralReset(kFC2_RST_SHIFT_RSTn);
  USART_Init(RS485_UART_PERIPHERAL, &RS485_UART_config, RS485_UART_CLOCK_SOURCE);
}

/***********************************************************************************************************************
 * Initialization functions
 **********************************************************************************************************************/
void BOARD_InitPeripherals(void)
{
  /* Initialize components */
  RS485_UART_init();
}

/***********************************************************************************************************************
 * BOARD_InitBootPeripherals function
 **********************************************************************************************************************/
void BOARD_InitBootPeripherals(void)
{
  BOARD_InitPeripherals();
}
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board/pin_mux.c

/***********************************************************************************************************************
 * This file was generated by the MCUXpresso Config Tools. Any manual edits made to this file
 * will be overwritten if the respective MCUXpresso Config Tools is used to update this file.
 **********************************************************************************************************************/

/* clang-format off */
/*
 * TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
!!GlobalInfo
product: Pins v4.1
processor: LPC54114J256
package_id: LPC54114J256BD64
mcu_data: ksdk2_0
processor_version: 4.0.0
board: LPCXpresso54114
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS ***********
 */
/* clang-format on */

#include "fsl_common.h"
#include "fsl_iocon.h"
#include "pin_mux.h"

/* FUNCTION ************************************************************************************************************
 *
 * Function Name : BOARD_InitBootPins
 * Description   : Calls initialization functions.
 *
 * END ****************************************************************************************************************/
void BOARD_InitBootPins(void)
{
    BOARD_InitPins();
}

/* clang-format off */
/*
 * TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
BOARD_InitPins:
- options: {callFromInitBoot: 'true', coreID: cm4, enableClock: 'true'}
- pin_list:
  - {pin_num: '31', peripheral: FLEXCOMM0, signal: RXD_SDA_MOSI, pin_signal: PIO0_0/FC0_RXD_SDA_MOSI/FC3_CTS_SDA_SSEL0/CTIMER0_CAP0/SCT0_OUT3, mode: inactive, invert: disabled,
    glitch_filter: disabled, slew_rate: standard, open_drain: disabled}
  - {pin_num: '32', peripheral: FLEXCOMM0, signal: TXD_SCL_MISO, pin_signal: PIO0_1/FC0_TXD_SCL_MISO/FC3_RTS_SCL_SSEL1/CTIMER0_CAP1/SCT0_OUT1, mode: inactive, invert: disabled,
    glitch_filter: disabled, slew_rate: standard, open_drain: disabled}
  - {pin_num: '44', peripheral: FLEXCOMM2, signal: TXD_SCL_MISO, pin_signal: PIO0_9/FC2_TXD_SCL_MISO/SCT0_OUT2/CTIMER3_CAP0/FC3_CTS_SDA_SSEL0, mode: inactive}
  - {pin_num: '43', peripheral: FLEXCOMM2, signal: RXD_SDA_MOSI, pin_signal: PIO0_8/FC2_RXD_SDA_MOSI/SCT0_OUT1/CTIMER0_MAT3, mode: inactive}
  - {pin_num: '14', peripheral: FLEXCOMM2, signal: RTS_SCL_SSEL1, pin_signal: PIO1_0/PDM0_DATA/FC2_RTS_SCL_SSEL1/CTIMER3_MAT1/CTIMER0_CAP0/ADC0_3, mode: inactive}
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS ***********
 */
/* clang-format on */

/* FUNCTION ************************************************************************************************************
 *
 * Function Name : BOARD_InitPins
 * Description   : Configures pin routing and optionally pin electrical features.
 *
 * END ****************************************************************************************************************/
/* Function assigned for the Cortex-M4F */
void BOARD_InitPins(void)
{
    /* Enables the clock for the IOCON block. 0 = Disable; 1 = Enable.: 0x01u */
    CLOCK_EnableClock(kCLOCK_Iocon);

    const uint32_t port0_pin0_config = (/* Pin is configured as FC0_RXD_SDA_MOSI */
                                        IOCON_PIO_FUNC1 |
                                        /* No addition pin function */
                                        IOCON_PIO_MODE_INACT |
                                        /* Input function is not inverted */
                                        IOCON_PIO_INV_DI |
                                        /* Enables digital function */
                                        IOCON_PIO_DIGITAL_EN |
                                        /* Input filter disabled */
                                        IOCON_PIO_INPFILT_OFF |
                                        /* Standard mode, output slew rate control is enabled */
                                        IOCON_PIO_SLEW_STANDARD |
                                        /* Open drain is disabled */
                                        IOCON_PIO_OPENDRAIN_DI);
    /* PORT0 PIN0 (coords: 31) is configured as FC0_RXD_SDA_MOSI */
    IOCON_PinMuxSet(IOCON, 0U, 0U, port0_pin0_config);

    const uint32_t port0_pin1_config = (/* Pin is configured as FC0_TXD_SCL_MISO */
                                        IOCON_PIO_FUNC1 |
                                        /* No addition pin function */
                                        IOCON_PIO_MODE_INACT |
                                        /* Input function is not inverted */
                                        IOCON_PIO_INV_DI |
                                        /* Enables digital function */
                                        IOCON_PIO_DIGITAL_EN |
                                        /* Input filter disabled */
                                        IOCON_PIO_INPFILT_OFF |
                                        /* Standard mode, output slew rate control is enabled */
                                        IOCON_PIO_SLEW_STANDARD |
                                        /* Open drain is disabled */
                                        IOCON_PIO_OPENDRAIN_DI);
    /* PORT0 PIN1 (coords: 32) is configured as FC0_TXD_SCL_MISO */
    IOCON_PinMuxSet(IOCON, 0U, 1U, port0_pin1_config);

    IOCON->PIO[0][8] = ((IOCON->PIO[0][8] &
                         /* Mask bits to zero which are setting */
                         (~(IOCON_PIO_FUNC_MASK | IOCON_PIO_MODE_MASK | IOCON_PIO_DIGIMODE_MASK)))

                        /* Selects pin function.
                         * : PORT08 (pin 43) is configured as FC2_RXD_SDA_MOSI. */
                        | IOCON_PIO_FUNC(PIO08_FUNC_ALT1)

                        /* Selects function mode (on-chip pull-up/pull-down resistor control).
                         * : Inactive.
                         * Inactive (no pull-down/pull-up resistor enabled). */
                        | IOCON_PIO_MODE(PIO08_MODE_INACTIVE)

                        /* Select Analog/Digital mode.
                         * : Digital mode. */
                        | IOCON_PIO_DIGIMODE(PIO08_DIGIMODE_DIGITAL));

    IOCON->PIO[0][9] = ((IOCON->PIO[0][9] &
                         /* Mask bits to zero which are setting */
                         (~(IOCON_PIO_FUNC_MASK | IOCON_PIO_MODE_MASK | IOCON_PIO_DIGIMODE_MASK)))

                        /* Selects pin function.
                         * : PORT09 (pin 44) is configured as FC2_TXD_SCL_MISO. */
                        | IOCON_PIO_FUNC(PIO09_FUNC_ALT1)

                        /* Selects function mode (on-chip pull-up/pull-down resistor control).
                         * : Inactive.
                         * Inactive (no pull-down/pull-up resistor enabled). */
                        | IOCON_PIO_MODE(PIO09_MODE_INACTIVE)

                        /* Select Analog/Digital mode.
                         * : Digital mode. */
                        | IOCON_PIO_DIGIMODE(PIO09_DIGIMODE_DIGITAL));

    IOCON->PIO[1][0] = ((IOCON->PIO[1][0] &
                         /* Mask bits to zero which are setting */
                         (~(IOCON_PIO_FUNC_MASK | IOCON_PIO_MODE_MASK | IOCON_PIO_DIGIMODE_MASK)))

                        /* Selects pin function.
                         * : PORT10 (pin 14) is configured as FC2_RTS_SCL_SSEL1. */
                        | IOCON_PIO_FUNC(PIO10_FUNC_ALT2)

                        /* Selects function mode (on-chip pull-up/pull-down resistor control).
                         * : Inactive.
                         * Inactive (no pull-down/pull-up resistor enabled). */
                        | IOCON_PIO_MODE(PIO10_MODE_INACTIVE)

                        /* Select Analog/Digital mode.
                         * : Digital mode. */
                        | IOCON_PIO_DIGIMODE(PIO10_DIGIMODE_DIGITAL));
}
/***********************************************************************************************************************
 * EOF
 **********************************************************************************************************************/
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[miguel_mendoza · Accepted solution]

Hi Marc Bressler,

The problem was that you don't select a clock for the FLEXCOMM used, that's why when the code arrives in the "USART_INIT" function, in "BOARD_InitBootPeripherals()" stays hung.

You only have to add a CLOCK_AttachClk function just before init your peripherals, and is this function you have to select the clock that you want, in "fsl_clock.h" has a series of macros that you can use.

For example, you are using the FLEXCOMM2 so you can call the function with the 12 MHz clock, like this CLOCK_AttachClk(kFRO12M_to_FLEXCOMM2).

I hope that with this you can solve the problem, and let me know your results.

regards,
Miguel

[mbressler]

Thank you very much. One problem down, on to the next, but that was definitely the correct answer for that problem.

[mbressler]

EDIT: That did the trick, I had accidentally switched to UART debugging in the meanwhile and that doesn't ever work but switching back to Semihost and adding that line did the trick. I'll let you know how it goes.

Thank you for the suggestion, tried it out but no luck.

Still hanging with the following code which never reaches the hello world.

#include <stdio.h>
#include "board.h"
#include "peripherals.h"
#include "pin_mux.h"
#include "clock_config.h"
#include "LPC54114_cm4.h"
#include "fsl_debug_console.h"

uint8_t data[] {0x53, 0x7f};


/*
 * @brief   Application entry point.
 */
int main(void) {

       /* Init board hardware. */
    BOARD_InitBootPins();
    BOARD_InitBootClocks();

    CLOCK_AttachClk(kFRO12M_to_FLEXCOMM2);

    BOARD_InitBootPeripherals();
       /* Init FSL debug console. */
    BOARD_InitDebugConsole();

    PRINTF("Hello World\n");

    /* Force the counter to be placed into memory. */
    volatile static int i = 0 ;
    /* Enter an infinite loop, just incrementing a counter. */
    while(1) {
        i++ ;
    }
    return 0 ;
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍