AM6442: mcspi on m4f

Hi Alan,

Thank you for writing the description so precise and clear.

Allow me sometime to put forward an explanation where I will seek answers to further questions from my end.

Respectfully,

Vaibhav

Hi Alan,

Please let me know the time seen on the wire for both the MCSPI0 and MCSPI1 instances.

Additionally, put out the time for the MCSPI_transfer() API call as well for both MCSPI0 and MCSPI1 instance.

If the wire transmission time(which can be seen via logic analyzer) is  not available, it is okay and you can go ahead and give me the time for the second ask.

Respectfully,

Vaibhav

Hello Vaibhav

Below is what I saw in our current system

Hi Alan,

Please help me with the few more information.

Alan Ismail said:

MCSPI0 Call back at ~54us

Is the callback initiated at 54 us or the callback is completely executed at 54 us?

Regards,

Vaibhav

Hi Vaibhav

MCSPI0 call back starts at 53us

MCSPI0 call back ends at 54us

Thanks

Alan I

Hi Alan,

The transaction of MCSPI0 and MCSPI1 are taking place on two different threads?

Regards,

Vaibhav

Hi Vaibhav

I am running bare metal , single thread

Alan I

Hi Alan,

Please send me the sysconfig settings for both the MCSPIs, a screenshot would do as well.

Regards,

Vaibhav

/**
* These arguments were used when this file was generated. They will be automatically applied on subsequent loads
* via the GUI or CLI. Run CLI with '--help' for additional information on how to override these arguments.
* @cliArgs --device "AM64x" --package "ALV" --part "Default" --context "m4fss0-0" --product "MCU_PLUS_SDK_AM64x@09.02.01"
* @versions {"tool":"1.20.0+3587"}
*/

/**
* Import the modules used in this configuration.
*/
const ipc = scripting.addModule("/drivers/ipc/ipc");
const mcspi = scripting.addModule("/drivers/mcspi/mcspi", {}, false);
const mcspi1 = mcspi.addInstance();
const mcspi2 = mcspi.addInstance();
const addr_translate = scripting.addModule("/kernel/dpl/addr_translate", {}, false);
const addr_translate1 = addr_translate.addInstance();
const addr_translate2 = addr_translate.addInstance();
const addr_translate3 = addr_translate.addInstance();
const addr_translate4 = addr_translate.addInstance();
const clock = scripting.addModule("/kernel/dpl/clock");
const debug_log = scripting.addModule("/kernel/dpl/debug_log");
const mpu_armv7 = scripting.addModule("/kernel/dpl/mpu_armv7", {}, false);
const mpu_armv71 = mpu_armv7.addInstance();
const mpu_armv72 = mpu_armv7.addInstance();
const mpu_armv73 = mpu_armv7.addInstance();

/**
* Write custom configuration values to the imported modules.
*/
ipc.r5fss1_0 = "NONE";
ipc.r5fss1_1 = "NONE";
ipc.r5fss0_1 = "NONE";
ipc.r5fss0_0 = "notify";
ipc.intrPriority = 0;

mcspi1.$name = "CONFIG_MCSPI0";
mcspi1.transferMode = "CALLBACK";
mcspi1.txFifoTrigLevel = 32;
mcspi1.rxFifoTrigLevel = 32;
mcspi1.intrPriority = 5;
mcspi1.transferCallbackFxn = "isr_ch_a_callback";
mcspi1.MCU_SPI.$assign = "MCU_SPI0";
mcspi1.mcspiChannel[0].$name = "CONFIG_MCSPI_CH0";
mcspi1.mcspiChannel[0].frameFormat = "POL0_PHA1";
mcspi1.mcspiChannel[0].bitRate = 10000000;
mcspi1.child.$name = "drivers_mcspi_v0_mcspi_v0_template0";

mcspi2.$name = "CONFIG_MCSPI1";
mcspi2.transferMode = "CALLBACK";
mcspi2.txFifoTrigLevel = 32;
mcspi2.rxFifoTrigLevel = 32;
mcspi2.intrPriority = 6;
mcspi2.transferCallbackFxn = "isr_ch_b_callback";
mcspi2.MCU_SPI.$assign = "MCU_SPI1";
mcspi2.mcspiChannel[0].$name = "CONFIG_MCSPI_CH1";
mcspi2.mcspiChannel[0].frameFormat = "POL0_PHA1";
mcspi2.mcspiChannel[0].bitRate = 10000000;
mcspi2.mcspiChannel[0].MCU_CSn.$assign = "MCU_UART1_RTSn";
mcspi2.child.$name = "drivers_mcspi_v0_mcspi_v0_template1";

addr_translate1.$name = "CONFIG_ADDR_TRANSLATE_REGION0";
addr_translate1.localAddr = 0x80000000;

addr_translate2.$name = "CONFIG_ADDR_TRANSLATE_REGION1";
addr_translate2.systemAddr = 0x20000000;
addr_translate2.localAddr = 0xA0000000;

addr_translate3.$name = "CONFIG_ADDR_TRANSLATE_REGION2";
addr_translate3.systemAddr = 0x40000000;
addr_translate3.localAddr = 0xC0000000;

addr_translate4.$name = "CONFIG_ADDR_TRANSLATE_REGION3";
addr_translate4.systemAddr = 0x60000000;
addr_translate4.localAddr = 0x60000000;

debug_log.enableCssLog = false;
debug_log.enableLogZoneWarning = false;
debug_log.enableLogZoneError = false;

mpu_armv71.$name = "CONFIG_MPU_REGION0";
mpu_armv71.attributes = "Device";
mpu_armv71.allowExecute = false;

mpu_armv72.$name = "CONFIG_MPU_REGION1";
mpu_armv72.size = 18;

mpu_armv73.$name = "CONFIG_MPU_REGION2";
mpu_armv73.attributes = "NonCached";
mpu_armv73.baseAddr = 0x701E0000;
mpu_armv73.size = 16;
mpu_armv73.allowExecute = false;

/**
* Pinmux solution for unlocked pins/peripherals. This ensures that minor changes to the automatic solver in a future
* version of the tool will not impact the pinmux you originally saw. These lines can be completely deleted in order to
* re-solve from scratch.
*/
mcspi1.MCU_SPI.CLK.$suggestSolution = "MCU_SPI0_CLK";
mcspi1.MCU_SPI.D0.$suggestSolution = "MCU_SPI0_D0";
mcspi1.MCU_SPI.D1.$suggestSolution = "MCU_SPI0_D1";
mcspi1.mcspiChannel[0].MCU_CSn.$suggestSolution = "MCU_SPI0_CS0";
mcspi2.MCU_SPI.CLK.$suggestSolution = "MCU_SPI1_CLK";
mcspi2.MCU_SPI.D0.$suggestSolution = "MCU_SPI1_D0";
mcspi2.MCU_SPI.D1.$suggestSolution = "MCU_SPI1_D1";

Hi Alan,

Thanks for specifying the sysconfig file. Allow me sometime to comment on this.

Regards,

Vaibhav

Hi Alan,

I have opened the SysConfig and checked the configurations.

Can you please try to see if your operations of MCSPI, basically the MCSPI Transfer is happening at frequency of suppose 50 MHz?

Please let me know.

Also, I am assuming that we can see timing/latency improvements as well.

Regards,

Vaibhav