Can't use transfer protocol while in an interrupt function

LBLDT — Tue, 27 Aug 2024 07:48:53 GMT

Hi,

I'm using a LPIT timer to trigger the reading and writing of data to my ICs through SPI & I2C. Before, that was done in an infinite loop in the main function but as soon as I paste it in the LPIT trigger function I am always reading STATUS_BUSY with the LPSPI_DRV_MasterGetTransferStatus() function. Did you had this problem before ?

void LPIT0_Ch1_ISR(void){ LPIT_DRV_ClearInterruptFlagTimerChannels(INST_LPIT0, 1<<LPIT0_CHANNEL1); uint8_t spi_data_receive[2]; hall_singleRead(LPSPICOM0, (uint8_t *)(&UART_command_param.sys_param.spi_read_address), (uint8_t *)(&spi_data_receive), 2); MAX5215_setOutput(INST_LPI2C0, &UART_command_param); ADC_readConversion(INST_LPI2C0, &UART_command_param); enableBuck(&UART_command_param); UART_command_param.sys_param.spi_read_value[0] = spi_data_receive[0]; UART_command_param.sys_param.spi_read_value[1] = spi_data_receive[1]; } void hall_singleRead(uint32_t instance, uint8_t * sendBuffer, uint8_t * receiveBuffer, uint16_t transferByteCount){ LPSPI_DRV_MasterTransfer(instance, sendBuffer, NULL, transferByteCount); while(LPSPI_DRV_MasterGetTransferStatus(instance, NULL)==STATUS_BUSY){}; LPSPI_DRV_MasterTransfer(instance, NULL, receiveBuffer, transferByteCount); while(LPSPI_DRV_MasterGetTransferStatus(instance, NULL)==STATUS_BUSY){}; }

Re: Can't use transfer protocol while in an interrupt function

PetrS — Wed, 28 Aug 2024 05:34:29 GMT

Hi,

try to increase interrupt priority for LPSPI.

BR, Petr

topic Re: Can't use transfer protocol while in an interrupt function in S32K

Can't use transfer protocol while in an interrupt function

Re: Can't use transfer protocol while in an interrupt function