Porting STM32H723

Port to STM32H723: UART4 no console

Created at 2024-02-25 17:24:33

Dear all,

we are trying to port RT-Thread ver. 5 to our custom STM32H723 board. I hang in the initialization section, when RT-Thread want to print the welcome screen.

stm32h723_rt_thread_UART4.png

I follow the instruction "How to make a STM32 BSP for RT-Thread.md" from rt_thread/rt-thread/bsp/stm32/docs/. They may be a bit outdated, but the only info I could find.

The code loop forever in
while (__HAL_UART_GET_FLAG(&(uart->handle), UART_FLAG_TC) == RESET);

I have to use UART4, and try it without DMA. When I try to enable DMA for UART4 in Kconfig, the compiler complain about missing UART4_RX_DMA_INSTANCE:

rt_thread/rt-thread/bsp/stm32/libraries/HAL_Drivers/drivers/config/h7/uart_config.h:117:21: error: 'UART4_RX_DMA_INSTANCE' undeclared (first use in this function)

     .Instance = UART4_RX_DMA_INSTANCE,

Searching for that, it seems there is no UART4_RX_DMA_INSTANCE defined in
rt_thread/rt-thread/bsp/stm32/libraries/HAL_Drivers/drivers/config/h7/
only UART2_RX_DMA_INSTANCE. Searching over other STM32 families, they all seem to have UART4_RX_DMA_INSTANCE, but not the H7.

From the debug picture, it seems the UART4 is not fully setup,
BaudRate = 115200, WordLength = 0, StopBits = 0, Parity = 0,
WordLength should be 8, StopBit 1 and so on. I could not find, where to setup these details for UART4.

To fix that problem, I was guessing that the UART4 clock tree was not correct initalized. So I copied the function
HAL_UART_MspInit
from the CubeMX generated code into board.c. This fixes the problem with the
while (__HAL_UART_GET_FLAG(&(uart->handle), UART_FLAG_TC) == RESET);
loop. This was just guess work, and I dont know the side effects.

Now RT-Thread run, and the main app blinks a LED. But no output on the console of UART4. How to fix this?

Somebody can give me a hint?

Best regards,

更多

Follower
0
Views
726
Follow the question Answer the question Share Save Report
3 Answers
HansDampf
HansDampf 2024-02-25

I forgot, this is the code I copy from CubeMX to board.c. It is called direct after SystemClock_Config:

void HAL_UART_MspInit(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};

/** Initializes the peripherals clock
*/

PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_UART4;
PeriphClkInitStruct.Usart234578ClockSelection = RCC_USART234578CLKSOURCE_D2PCLK1;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
  Error_Handler();
}

/* Peripheral clock enable */
__HAL_RCC_UART4_CLK_ENABLE();

__HAL_RCC_GPIOC_CLK_ENABLE();
/**UART4 GPIO Configuration
PC10     ------> UART4_TX
PC11     ------> UART4_RX
*/
GPIO_InitStruct.Pin = U4TX_Pin|U4RX_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF8_UART4;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

/* UART4 interrupt Init */
HAL_NVIC_SetPriority(UART4_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(UART4_IRQn);

}

Liked 0 Add a reply Save Report
HansDampf
HansDampf 2024-02-26

by debugging further, I found out, that the UART4_IRQHandler is called only once, when the UART ist setup:
rt_thread/rt-thread/bsp/stm32/libraries/HAL_Drivers/drivers/drv_usart.c:244
stm32_control()

Shoulnd this UART4_IRQHandler called each time, when msh or finsh print something?

Liked 0 Add a reply Save Report
HansDampf
HansDampf 2024-02-26

I got the uSart10 working, dont know why its not working with uart4. The USART10 is ok for me, so I close these question.

Liked 0 Add a reply Save Report

Write Your Answer

Log in to publish your answer，Click here to log in.
Log in 注 册

Similar Questions

1
Rt-Thread 5.1.0 port to STM32H723: interrupt vector table problem

Hot Article

1
【BSP】Port RT-Thread on ST LoRa SoC——STM32WL
2
Analysis of scatter-loading mechanism and address-independent compilation of microcomputer (3)
3
Microcontroller Scatter-loading Mechanism, Address-Independent Compilation Analysis (I)
4
My understanding of RT-Thread SPI
5
Play with GD32303E-EVAL BSP-Read GPS sensor data!
6
Analysis of scatter-loading mechanism and address-independent compilation of microcomputer (2)
7
LPC1768_Nano3_Shell Rights Management
8
Analysis of scatter-loading mechanism and address-independent compilation of microcomputer (4)
9
Micro Python with Raspberry Pi PICO
10
ESP32-C3 BSP Released

Hot Questions

1
Display Menu on SSD1306 OLED display and select options by using Buttons need to do in esp-idf.
2
I successfully run RT-Thread on Raspberry Pi PICO
3
Share Your RTOS Experience/Project with us! Let's Talk!
4
How to use the SFUD library to operate SPI Flash devices?
5
Halloween Event! What's On Your Workspace?
6
What you want to see at RT-Thread IoT OS Global Tech Conference? Let's Talk!
7
Who got the board of Raspberry Pi PICO?
8
RT-Thread Studio IDE v2.1.0 Release Adds 40+ Boards Include ST, NXP, TI, Raspberry Pi and MicroChip!
9
RT-Thread version for FH8852
10
Porting the LVGL library.

Trending Topics

Rt-Treadstudio RaspberryPiPICO STM32 IDE Rt-threadstudio Rt-Thread RT-ThreadVersion studio Build HelloRT-Thread OpenSource DIY EmbeddedSystems RP2040 TFT raspberrypi Console BSP MicroPython uf2 Let'sTalk LVGL IoT lwip wifi SPI Nano Hardware LED ChristmasEvent Fullhan threads BeginnersGuide #stm32 #timer DevBoard EmbeddedDev2021 pico TechConference #cubemx #rtstudio RT-ThreadIoTOSGlobalTechConference ethernet Embedded modbus samd21 Linux scons GUI Webinar

Questions waiting for solution

Ask
Error in file system generation
Ask
How to use Ethernet (ENC28j60) in STM32F401 BlackPill
Ask
Error in compilation
Ask
What codes should open source if YAFFS2 is used with RTT?
Ask
IoT Webinar: Power the IoT Devices.
Ask
RT-Thread Auto-Initialization Mechanism Analysis
Ask
Connect Thingspeak on RT-Thread Project!
Ask
POSIX Standard and RT-Thread Implementation
Ask
LVGL GUI on RT-Smart MicroKernel Operating System
Ask
UART client does not connect

Expert Recommendation

uLipe
uLipe
1 answer , 0 answer Solved
Alberto
Alberto
0 answer , 0 answer Solved

Create
Post

Share