Kinetis Software Development KitのトピックRe: How to use the flexbus of K64?

How to use the flexbus of K64?

zhailing — Mon, 13 Feb 2017 07:40:39 GMT

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

Re: How to use the flexbus of K64?

Robin_Shen — Wed, 15 Feb 2017 08:21:58 GMT

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

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: How to use the flexbus of K64?

zhailing — Thu, 16 Feb 2017 06:52:24 GMT

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

Re: How to use the flexbus of K64?

Robin_Shen — Thu, 16 Feb 2017 07:06:12 GMT

Hi Zhai,

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

Best Regards,

Robin

Re: How to use the flexbus of K64?

zhailing — Tue, 21 Feb 2017 05:54:27 GMT

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