IMXRT1064 SEMC - Read Operation Fail

Lukas_Frank — Tue, 29 Aug 2023 13:06:01 GMT

Hi Dear Authorized,

I have been trying sequential read operations for months. My setups includes IMXRT1064 (Master) and FPGA (Slave) which is connected SEMC Interface. It stops after 1 read operation is occured. I examined SDK examples and below directions for configuration phase shared officially below:

How to configure SRAM in SEMC modules for RT devic... - NXP Community

Could you please help me about below questions?

Q1: The things I clearly face is; FPGA Logic Analyzer is address count is not increasing when I try to access SEMC_BASE address more than one. In the first initialization, IMXRT1064 request data from FPGA after the SEMC_ConfigureSRAM function is executed, and then memory is fulfilling with FPGA datas. It is exactly happening when the base->BR[6] = tempBRVal; line is executed. Why we are not able to request data from FPGA in sequential order when we access memory with below code portion?

void SEMC_SRAMRead16Bit(void) { uint32_t index = 0; uint16_t *sramFPGAData = (uint16_t *)EXAMPLE_SEMC_START_ADDRESS; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; sram_readBuffer16B[index++] = sramFPGAData[index++]; }

Q2: Is there a specific register setting in IMXRT1064 for triggering the FPGA for read request?

I attached my whole source code. You can reference it for full acquisition of case.

Thanks and Regards.

Re: IMXRT1064 SEMC - Read Operation Fail

Lukas_Frank — Fri, 01 Sep 2023 07:40:23 GMT

Dear @Pavel_Hernandez ,

Could you please help me if this breakdown is under your specialization?

Thanks and Regards.

i.MX ProcessorsのトピックRe: IMXRT1064 SEMC - Read Operation Fail

IMXRT1064 SEMC - Read Operation Fail

Re: IMXRT1064 SEMC - Read Operation Fail