Posted on January 05, 2018 at 10:59
Hi and happy new year
I need help,to avoid an hard fault after un unpredictable time(2 ...120 sec) when i use the USART1 Tx
MCU is STM32F410RBT,mounted on a custom board
Configuration done with CubeMx,IDE is STM32 WorkbenchI have to acquire 12 analog channels at 1KHz,then i have to send the data to a PC using USART1 at 460800 bpsI trigger the ADC with TIM1,then the ADC transfers in DMA the 12 x 12 bit samples to a 16 bit buffer
unsigned short ADC1ConvertedValues[ADC_BUFFER_SIZE];I associated some interrupt to the timer event ,to the end of 12 channels conversions and to the end of ADC DMA transfer,
in these interrupt routines i move somo pin so that i can't verify on the scope the activities.
Channel1-yellow and channel 2-blue goes high when the TIM event happensChannel 1 goes low ath the end of ADC conversions,Channel 2 goes low at the end of ADC DMA transferA 3rd scope -green channel is connected to the UART Tx pin
Anyway everything looks okay until here.
In the DMA interrupt routine i call HAL_UART_Transmit_DMA(&huart1, (uint8_t *)buff_char_prova, 20);
or i simply turn on a flag that calls the same function in the main loop.
After some seconds i have hard fault ,the same happens if i call HAL_UART_Transmit_IT(&huart1, (uint8_t *)buff_char_prova, 20);or the blocking function
HAL_UART_Transmit(&huart1, (uint8_t *)buff_char_prova, 20);//(in main loop)
Saving the content of registers and program counter PC during hard fault shows every time a different PC value.May i have some help,please ?Attached is the whole project,including CubeMx file.Many thanks for your time.Diego,Milan ,Italy
