LPC MicrocontrollersのトピックRe: SPI Interface between the LPC1227FBD48 wit the SLRC610 RFID

SPI Interface between the LPC1227FBD48 wit the SLRC610 RFID

sai-t — Sat, 28 Dec 2024 06:37:21 GMT

Hi Team,

I am working on to interface the SPI communication between the LPC1277 controller with the SLRC610 RFID chip. Can yo please share the demo sample code to read the EEPROM data of the SLRC610 chip in order to do communication between them. Because I am unable to find any references online for this microcontroller.

Re: SPI Interface between the LPC1227FBD48 wit the SLRC610 RFID

Alice_Yang — Mon, 30 Dec 2024 10:15:03 GMT

Hello @sai-t

Firstly, you can refer to the thread below and the SPI demo under "LPC12xx CMSIS Driver Library".

https://community.nxp.com/t5/LPCXpresso-IDE/SSP-SPI-problem-LPC1227/m-p/592093

Please contact us if you still have any issues.

Alice

Re: SPI Interface between the LPC1227FBD48 wit the SLRC610 RFID

sai-t — Wed, 08 Jan 2025 11:06:22 GMT

Hi Alice_Yang, Thanks for your help. I have gone through the code and tried it in my project. But when I am trying to use those functions the BSY bit is continuously getting HIGH and getting struct in the while condition. And because of that I am unable to store the response that is coming from the MISO line. The same DR register is used for the transmission and the receiver. Can you help me how to resolve this issue.

Re: SPI Interface between the LPC1227FBD48 wit the SLRC610 RFID

sai-t — Thu, 09 Jan 2025 11:33:01 GMT

Please find the attached files for the SPI transaction I have done in order to communicate with the Slave device. I am trying to fetch the product ID of the SLRC610 which is present in the 01h address of the EEPROM.I am receiving the continuous 0xFF as a response.

Could you please check and let me know the issue.

Re: SPI Interface between the LPC1227FBD48 wit the SLRC610 RFID

Alice_Yang — Mon, 13 Jan 2025 11:08:18 GMT

Hello @sai-t

I recommend that you use a logic analyzer to capture signal and check where the problem occurs. If still can not solve, please send the signal picture to me, I help you check. Thanks.

Alice

Re: SPI Interface between the LPC1227FBD48 wit the SLRC610 RFID

sai-t — Tue, 14 Jan 2025 10:30:34 GMT

Hi @Alice_Yang thanks for the reply we want to get the Product ID from address 0x01

using the code

SPI_ChipSelect(1);

// Send read command and address

SPI_TransferJ(0x03); // Read command

SPI_TransferJ(0x01);

rdata = SPI_TransferJ(0x00); // Dummy write to read data

for (volatile int j = 0; j < 1000; j++);

SPI_ChipSelect(0);

but on analyzer the data is shown different like on MOSI 0x03 become 0x06 (left sift ) can you look and update me what is going wrong from my side??

Re: SPI Interface between the LPC1227FBD48 wit the SLRC610 RFID

Alice_Yang — Thu, 23 Jan 2025 08:37:13 GMT

Hello @sai-t

If you send 0x03, yet the signal detected on the analyzer shows 0x06, you should first check the Data register (DR).

Alice

Re: SPI Interface between the LPC1227FBD48 wit the SLRC610 RFID

ajit_s19871 — Wed, 05 Mar 2025 05:04:01 GMT

Can you please full code, I started this but not getting full details, I want to run FreeRTOS on LPC1227FBD48 mcu, If you have any idea or code can you please share with me.
If you share, its easy to modify next integration.
Thank you in advanced .