i have one spi master question

[mekoc_1223776]

I have one question about spi master Read access

I try to read 256 bytes of data from flash

all data come out of flash correctly

but spi madule does not read all the data

here is my code

                   SPIM_Flash_Write(0x06);  //Write Enable

                     CyDelay(1000);

                    SPIM_Flash_Write(0x03);  //Read data byte

                    SPIM_Flash_Write(0x05);  //add 00 Add_Rd_Hi

                    SPIM_Flash_Write(0x01);  //sectR Add_Rd_Lo

                    SPIM_Flash_Write(0x00);

                for(j=0; j<240; j++){  //240

                    SPIM_Flash_Write(0x00);  //to generat read clk

                    // SPIM_Flash_ReadArraybl(dbg_array_flashdata,240);  did not work

                    dbg_array_flashdata = SPIM_Flash_Read();// this only read up to 0x7f it does not read the rest

[NoriTan]

What did you set to the Rx Buffer Size?

When you want to read the array at once, the Rx Buffer Size must be larger than 240+6 bytes.

If you declare the integer variable j as 8-bit signed integer like int8, the program exits from the for loop when j becomes 0x80.

Regards,

Noriaki

[mekoc_1223776]

I think you are right,

How you set to the Rx Buffer Size?

thanks

[mekoc_1223776]

j is a int   int j;

if you refer to buffer size  240 as I mention it did not works

SPIM_Flash_ReadArraybl(dbg_array_flashdata,240);  did not work

Could  you please just post correct code here

Thanks

[NoriTan · Accepted solution]

I have a PSoC Creator project on Github at following URL.

GitHub - noritan/Design116_3p0_3: F-RAM test project using SPI

• Four F-RAMs are attached to PSoC 3.
• PSoC Creator 3.0 is used for development.
• DMAs are attached to the SPIM RX and TX.
• Polling model implementation is available in old commits.
  • Source code: Design116_3p0_3/main.c at 837d9cd9aa25b8900eececfbeb10f19ab184842b · noritan/Design116_3p0_3 · GitHu...
  • The PACKET_SIZE is set to 64 and the Buffer size is 80.

Anyway,

Which PSoC are you using?

Are you using any library accessing SPI Flash?

Regards,

Noriaki