I.MX9352 M33 Problems with output floating-point data when developing with IAR

HL_G — Fri, 25 Oct 2024 02:04:53 GMT

Hello.

When developing I.MX9352 Cortex-M33 with IAR1 9.50.2, it was not possible to output floating-point data via redirected printf.

The SDK used is SDK_2_16_000_MIMX9352xxxxM

The following Settings have been made in the IAR Settings.

Here's my code:

/* * Copyright (c) 2015, Freescale Semiconductor, Inc. * Copyright 2016-2017 NXP * All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include "pin_mux.h" #include "clock_config.h" #include "board.h" #include "fsl_debug_console.h" #include "fsl_rgpio.h" /******************************************************************************* * Definitions ******************************************************************************/ #define BOARD_LED_RGPIO GPIO3 #define BOARD_LED_RGPIO_PIN 26U #define EXAMPLE_RGPIO_CLOCK_ROOT kCLOCK_Root_BusWakeup #define EXAMPLE_RGPIO_CLOCK_GATE kCLOCK_Gpio3 double Pi = 3.1415926; /******************************************************************************* * Prototypes ******************************************************************************/ /*! * @brief delay a while. */ void delay(void); /******************************************************************************* * Variables ******************************************************************************/ /******************************************************************************* * Code ******************************************************************************/ /*! * @brief Main function */ int main(void) { /* Define the init structure for the output LED pin*/ rgpio_pin_config_t led_config = { kRGPIO_DigitalOutput, 0, }; /* Board pin, clock, debug console init */ /* clang-format off */ const clock_root_config_t rgpioClkCfg = { .clockOff = false, .mux = 0, // 24Mhz Mcore root buswake clock .div = 1 }; /* clang-format on */ BOARD_InitBootPins(); BOARD_BootClockRUN(); BOARD_InitDebugConsole(); CLOCK_SetRootClock(EXAMPLE_RGPIO_CLOCK_ROOT, &rgpioClkCfg); CLOCK_EnableClock(EXAMPLE_RGPIO_CLOCK_GATE); CLOCK_EnableClock(kCLOCK_Gpio2); /* Set PCNS register value to 0x0 to prepare the RGPIO initialization */ BOARD_LED_RGPIO->PCNS = 0x0; /* Print a note to terminal. */ PRINTF("\r\n RGPIO Driver example\r\n"); PRINTF("\r\n The LED is taking turns to shine.\r\n"); /* Init output LED GPIO. */ RGPIO_PinInit(BOARD_LED_RGPIO, BOARD_LED_RGPIO_PIN, &led_config); while (1) { PRINTF("output float value:Pi=%f %lf\r\n", Pi, Pi); SDK_DelayAtLeastUs(1000000U, SystemCoreClock); RGPIO_PortToggle(BOARD_LED_RGPIO, 1u << BOARD_LED_RGPIO_PIN); } }

The actual effect is as follows:

Re: I.MX9352 M33 Problems with output floating-point data when developing with IAR

Zhiming_Liu — Tue, 29 Oct 2024 01:09:30 GMT

Hi @HL_G
Please refer this case to modify PRINTF function in SDK:

https://community.nxp.com/t5/i-MX-Processors/i-MX8MP-Cannot-print-float-values-from-SDK-M7-examples/m-p/1407676#M186549

Best Regards
Zhiming

Re: I.MX9352 M33 Problems with output floating-point data when developing with IAR

HL_G — Tue, 29 Oct 2024 01:28:56 GMT

Hi.@Zhiming_Liu
Thanks.
It seems that this approach is no better than using the sprintf function to convert to string output. Is there a way to print floating-point data directly using PRINTF?
Like this:

main() { double pi = 3.1415926; PRINTF("pi = %f\r\n", pi); }

The output:

pi = 3.141593

Re: I.MX9352 M33 Problems with output floating-point data when developing with IAR

Zhiming_Liu — Tue, 29 Oct 2024 02:13:38 GMT

Hello,

The existing PRINTF has a bit of a problem with float, or if you're not using serial printing and use printf inside the IAR

Best Regards,
Zhiming

i.MX ProcessorsのトピックRe: I.MX9352 M33 Problems with output floating-point data when developing with IAR

I.MX9352 M33 Problems with output floating-point data when developing with IAR

Re: I.MX9352 M33 Problems with output floating-point data when developing with IAR

Re: I.MX9352 M33 Problems with output floating-point data when developing with IAR

Re: I.MX9352 M33 Problems with output floating-point data when developing with IAR