Part Number: BQ76952
Tool/software:
Hello, I have encountered some problems that are not clearly explained in the manual when using bq76952. I need your help
As shown in the picture，When using SPI communication, for example, to obtain the cell voltage data with address 0x14 from bq76952, I need to send (the register address (0x14)+data+CRC) twice, and obtain the voltage data of 0x14 on the second attempt.There is a problem that after the host sends the register address (0x14)+data+CRC once, it must wait for a certain time (500us) before sending the second time, otherwise it may encounter bq76952 returning 0xFF. One byte requires waiting for 500us, and there is a lot of data to be obtained from bq76952, which can cause significant blocking.
I understand that RTOS can avoid this problem.but I am using a bare computer device and cannot handle anything else while waiting. My following question is also based on using bare computer
Therefore, I have the following questions that I need your answers to. Thank you very much
1. If using IIC communication, does it also require a long wait to obtain data? In other words, can switching to IIC communication solve this problem?
2. Do you have any recommended solutions to solve this problem
3. To solve this problem, I have come up with a solution. May I ask if this approach is already the best solution?
As shown in the figure, I use a timer to trigger an interrupt, and then enable DMA in the interrupt. Each DMA will complete a data transmission（register address (0x14)+data+CRC）
In this method, communication with bq76952 is completed by a timer and DMA, avoiding useless CPU waiting
Looking forward to your reply
