How to use the flexbus of K64?

[zhailing]

 I use the demo driver to config the flexbus:

flexbus_config_t flexbusConfig;
FLEXBUS_GetDefaultConfig(&flexbusConfig);
flexbusConfig.waitStates = 2U;
flexbusConfig.chipBaseAddress = 0x60000000U;
flexbusConfig.chipBaseAddressMask = 7U;
FLEXBUS_Init(FB, &flexbusConfig);

but  can't measure any thing through the osilloscope wave form .

I can not measure the FB_ALE;  The pin always is low. 

plese help

Thanks and Regards

zhai

[Robin_Shen]

Hi zhai,

I test the flexbus example in SDK_2.1_TWR-K64F120M. The FB_ALE can be assert when measure it with osilloscope.

write:

read:

Hardware requirements:
- TWR-K64F120M board
- TWR-MEM board
- TWR-ELEV primary

Best Regards,

Robin

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[zhailing]

HI

   My  demo board is FRDM-K64F；

I don't have the demo software  code ；can you send it to me？I will test it in my demo board。

 Thangs and best regards

zhai

[Robin_Shen]

Hi Zhai,

You can download SDK_2.1_MK64FN1M0xxx12 from MCUXpresso Config Tools.

Best Regards,

Robin

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[zhailing]

hi  Robin_Shen

   Now i can get the signal  with the osilloscope.

 

     I grab signal with SignalTap II;  The MCS51_ADDR19 is FB_CS0. but another problem  occur.

Now i want to send 8 bit date and 16 bit address;     I don't want to the addres add by itself. The FB_CS0

and FB_ALE only chang one when i write it.

How to config it?

My configrations :
void FLEXBUS_GetDefaultConfig(flexbus_config_t *config)
{
config->chip = 0; /* Chip 0 FlexBus for validation */
config->writeProtect = 0; /* Write accesses are allowed */
config->burstWrite = 0; /* Burst-Write disable */
config->burstRead = 0; /* Burst-Read disable */
config->byteEnableMode = 0; /* Byte-Enable mode is asserted for data write only */
config->autoAcknowledge = true; /* Auto-Acknowledge enable */
config->extendTransferAddress = 0;//0; /* Extend transfer start/extend address latch disable */
config->secondaryWaitStates = 0; /* Secondary wait state disable */
config->byteLaneShift =kFLEXBUS_Shifted;//kFLEXBUS_NotShifted; /* Byte-Lane shift disable */
config->writeAddressHold = kFLEXBUS_Hold1Cycle; /* Write address hold 1 cycles */
config->readAddressHold = kFLEXBUS_Hold1Or0Cycles; /* Read address hold 0 cycles */
config->addressSetup =
kFLEXBUS_FirstRisingEdge; /* Assert ~FB_CSn on the first rising clock edge after the address is asserted */
config->portSize = kFLEXBUS_1Byte; /* 1 byte port size of transfer */
config->group1MultiplexControl = kFLEXBUS_MultiplexGroup1_FB_ALE; /* FB_ALE */
config->group2MultiplexControl = kFLEXBUS_MultiplexGroup2_FB_CS4; /* FB_CS4 */
config->group3MultiplexControl = kFLEXBUS_MultiplexGroup3_FB_CS5; /* FB_CS5 */
config->group4MultiplexControl = kFLEXBUS_MultiplexGroup4_FB_TBST; /* FB_TBST */
config->group5MultiplexControl = kFLEXBUS_MultiplexGroup5_FB_TA; /* FB_TA */
}
#define MRAM_START_ADDRESS 0x60008000U
flexbus_config_t flexbusConfig;
FLEXBUS_GetDefaultConfig(&flexbusConfig);
flexbusConfig.waitStates = 2U;
flexbusConfig.chipBaseAddress = MRAM_START_ADDRESS;
flexbusConfig.chipBaseAddressMask = 7U;
FLEXBUS_Init(FB, &flexbusConfig);

How to chang it?

Thanks and best regards

zhai