S32KのトピックRe: Using SPI0 to control two slave devices with differnent SPIconfig

Using SPI0 to control two slave devices with differnent SPIconfig

Leon06 — Mon, 24 Apr 2023 06:37:53 GMT

Hi all,

I have some issues about using the SPI module.

I want to use the S32k148 SPI0 to control two slave PMIC(FS65) and EEPROM(M95M01)

Because of the different baudrate and framsize, need to re-initialize the SPI0 configurations in the runtime. Before SPI data transmited, deinit the SPI first and then re-init SPI with the corresponded configuration.

status_t StartBlockingTransfer_SPI0(lpspi_which_pcs_t cs, uint8_t* u8_tx_buff, uint8_t* u8_rx_buff, uint16_t u16_len, uint32_t u32_timeout) { static uint8_t cs_temp; if(cs_temp != cs){ cs_temp = cs; SPI_MasterDeinit(&spi0Instance); SPI_MasterInit(&spi0Instance, &spi0MasterConfig[cs]); }else{ } //LPSPI_DRV_SetPcs(0U, cs, LPSPI_ACTIVE_LOW); return SPI_MasterTransferBlocking(&spi0Instance, u8_tx_buff, u8_rx_buff, u16_len, (uint16_t)u32_timeout); }

Below are the SPI0 configurations for the 2 slave devices.

spi_master_t spi0MasterConfig[2] = { [0] ={//PMIC .baudRate = 500000, .ssPolarity = SPI_ACTIVE_LOW, .frameSize = 16U, .clockPhase = READ_ON_EVEN_EDGE, .clockPolarity = SPI_ACTIVE_HIGH , .bitOrder = SPI_TRANSFER_MSB_FIRST, .transferType = LPSPI_USING_INTERRUPTS, .rxDMAChannel = 255U, .txDMAChannel = 255U, .callback = NULL, .callbackParam = NULL, .ssPin = 0, .extension = NULL }, [1] = {//EEPROM .baudRate = 1000000, //1MHz .ssPolarity = SPI_ACTIVE_LOW, .frameSize = 8U, .clockPhase = READ_ON_ODD_EDGE, .clockPolarity = SPI_ACTIVE_HIGH , .bitOrder = SPI_TRANSFER_MSB_FIRST, .transferType = LPSPI_USING_INTERRUPTS, .rxDMAChannel = 255U, .txDMAChannel = 255U, .callback = NULL, .callbackParam = NULL, .ssPin = 1, .extension = NULL, } };

Now I want to change the different configurations after the EEPROM page-write(256 bytes) transmitted completely, how could I make it?

About 16 bytes transmitted and then SPI0 deinit.

Leon

Re: Using SPI0 to control two slave devices with differnent SPIconfig

Robin_Shen — Thu, 04 May 2023 00:36:47 GMT

Hi Leon,

What's the value of u16_len and u32_timeout? If time expires SPI_MasterTransferBlocking() will return error and the transmission will be aborted. Did you check the return value?

Best Regards,
Robin
-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

Re: Using SPI0 to control two slave devices with differnent SPIconfig

Leon_Hsieh — Tue, 25 Apr 2023 01:28:14 GMT

Hi Robin,

I didn't check the return value yet.

I set the value u16_len = 260U,and u32_twmeout = 10U.

For testing, I close PMIC SPI and only EEPROM SPI active.

Also, I trace that the SPI messages fully transmitted is taken about 2ms.

Leon

Re: Using SPI0 to control two slave devices with differnent SPIconfig

Robin_Shen — Tue, 25 Apr 2023 08:38:15 GMT

Hi Leon,

Which version of S32DS+S32K SDK are you using? It is recommended to use the latest S32DSv3.4+S32K1 SDK RTM4.0.3
What is the return value?

Best Regards,
Robin

Re: Using SPI0 to control two slave devices with differnent SPIconfig

Leon06 — Tue, 02 May 2023 02:58:08 GMT

Hi Robin,

Thanks for your help.

Now , I add a SPI status checked before doing SPI de-initialized and initialized.

This way, it ensures that if the SPI module is busy, nothing will be done before the SPI configuration is changed.

status_t StartBlockingTransfer_SPI0(lpspi_which_pcs_t cs, uint8_t* u8_tx_buff, uint8_t* u8_rx_buff, uint16_t u16_len, uint32_t u32_timeout) { //If busy, not do spi initialize, Leon 20230427 LPSPI_Type *base = g_lpspiBase[0]; if (LPSPI_GetStatusFlag(base, LPSPI_MODULE_BUSY)) { return STATUS_BUSY; } static uint8_t cs_temp; if(cs_temp != cs){ cs_temp = cs; SPI_MasterDeinit(&spi0Instance); SPI_MasterInit(&spi0Instance, &spi0MasterConfig[cs]); }else{ } return SPI_MasterTransferBlocking(&spi0Instance, u8_tx_buff, u8_rx_buff, u16_len, (uint16_t)u32_timeout); }

Leon