SPI modes for FT4232 chip

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Stany MARCEL

16 Oct 2010 16 Oct '10

5:20 a.m.

Hello,

I want to use the FT4232 or FT2232 (with libfti) as a SPI master.

Thanks to you I have a good example of SPI code with libftdi and this device since you added it to your supported flasher.

I still don't know how to change some behavior of this component :

- Clock mode Mode 0: CPOL= 0 CPHA=0 Mode 1: CPOL= 0 CPHA=1 Mode 2: CPOL= 1 CPHA=0 Mode 3: CPOL= 1 CPHA=1

- Data shift order, MSB or LSB First.

If you have any information on theses subject, I'm very interested.

Thanks in advance

Extract from FTDI Documentation : For CPOL = 0, the base (inactive) level of SCLK is 0. In this mode: * When CPHA = 0, data will be read in on the rising edge of SCLK, and data will be clocked out on the falling edge of SCLK. * When CPHA = 1, data will be read in on the falling edge of SCLK, and data will clocked out on the rising edge of SCLK For CPOL =1, the base (inactive) level of SCLK is 1. In this mode: * When CPHA = 0, data will be read in on the falling edge of SCLK, and data will clocked out on the rising edge of SCLK * When CPHA =1, data will be read in on the rising edge of SCLK, and data will be clocked out on the falling edge of SCLK.

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Stany MARCEL

17 Oct 17 Oct

1:48 a.m.

On Sat, Oct 16, 2010 at 2:20 PM, Stany MARCEL stanypub@gmail.com wrote:

...

Hello,

I want to use the FT4232 or FT2232 (with libfti) as a SPI master.

Thanks to you I have a good example of SPI code with libftdi and this device since you added it to your supported flasher.

I still don't know how to change some behavior of this component :

Clock mode

Mode 0: CPOL= 0 CPHA=0 Mode 1: CPOL= 0 CPHA=1 Mode 2: CPOL= 1 CPHA=0 Mode 3: CPOL= 1 CPHA=1

Data shift order, MSB or LSB First.

If you have any information on theses subject, I'm very interested.

Thanks in advance

Extract from FTDI Documentation : For CPOL = 0, the base (inactive) level of SCLK is 0. In this mode: * When CPHA = 0, data will be read in on the rising edge of SCLK, and data will be clocked out on the falling edge of SCLK. * When CPHA = 1, data will be read in on the falling edge of SCLK, and data will clocked out on the rising edge of SCLK For CPOL =1, the base (inactive) level of SCLK is 1. In this mode: * When CPHA = 0, data will be read in on the falling edge of SCLK, and data will clocked out on the rising edge of SCLK * When CPHA =1, data will be read in on the rising edge of SCLK, and data will be clocked out on the falling edge of SCLK.

I found the needed informations in the SPI dll given by ftdi and the ftdi.h from libftdi.h

#define SPI_CMD_WR_BYTES_MSB_RE /* 0001 0000 */ (MPSSE_DO_WRITE) #define SPI_CMD_WR_BYTES_MSB_FE /* 0001 0001 */ (MPSSE_DO_WRITE|MPSSE_WRITE_NEG) #define SPI_CMD_WR_BYTES_LSB_RE /* 0001 1000 */ (MPSSE_DO_WRITE|MPSSE_LSB) #define SPI_CMD_WR_BYTES_LSB_FE /* 0001 1001 */ (MPSSE_DO_WRITE|MPSSE_LSB|MPSSE_WRITE_NEG)

#define SPI_CMD_RD_BYTES_MSB_RE /* 0010 0000 */ (MPSSE_DO_READ) #define SPI_CMD_RD_BYTES_MSB_FE /* 0010 0101 */ (MPSSE_DO_READ|MPSSE_READ_NEG|MPSSE_WRITE_NEG) #define SPI_CMD_RD_BYTES_LSB_RE /* 0010 1000 */ (MPSSE_DO_READ|MPSSE_LSB) #define SPI_CMD_RD_BYTES_LSB_FE /* 0010 1101 */ (MPSSE_DO_READ|MPSSE_LSB|MPSSE_READ_NEG|MPSSE_WRITE_NEG)

I will test all theses modes with an oscilloscope to verify that it works as expected.

Stany MARCEL

22 Oct 22 Oct

4:29 p.m.

On Sun, Oct 17, 2010 at 10:48 AM, Stany MARCEL stanypub@gmail.com wrote:

...

On Sat, Oct 16, 2010 at 2:20 PM, Stany MARCEL stanypub@gmail.com wrote:

...
Hello,

I want to use the FT4232 or FT2232 (with libfti) as a SPI master.

Thanks to you I have a good example of SPI code with libftdi and this device since you added it to your supported flasher.

I still don't know how to change some behavior of this component :

Clock mode

Mode 0: CPOL= 0 CPHA=0 Mode 1: CPOL= 0 CPHA=1 Mode 2: CPOL= 1 CPHA=0 Mode 3: CPOL= 1 CPHA=1

Data shift order, MSB or LSB First.

If you have any information on theses subject, I'm very interested.

Thanks in advance

Extract from FTDI Documentation : For CPOL = 0, the base (inactive) level of SCLK is 0. In this mode: * When CPHA = 0, data will be read in on the rising edge of SCLK, and data will be clocked out on the falling edge of SCLK. * When CPHA = 1, data will be read in on the falling edge of SCLK, and data will clocked out on the rising edge of SCLK For CPOL =1, the base (inactive) level of SCLK is 1. In this mode: * When CPHA = 0, data will be read in on the falling edge of SCLK, and data will clocked out on the rising edge of SCLK * When CPHA =1, data will be read in on the rising edge of SCLK, and data will be clocked out on the falling edge of SCLK.

I found the needed informations in the SPI dll given by ftdi and the ftdi.h from libftdi.h

#define SPI_CMD_WR_BYTES_MSB_RE /* 0001 0000 */ (MPSSE_DO_WRITE) #define SPI_CMD_WR_BYTES_MSB_FE /* 0001 0001 */ (MPSSE_DO_WRITE|MPSSE_WRITE_NEG) #define SPI_CMD_WR_BYTES_LSB_RE /* 0001 1000 */ (MPSSE_DO_WRITE|MPSSE_LSB) #define SPI_CMD_WR_BYTES_LSB_FE /* 0001 1001 */ (MPSSE_DO_WRITE|MPSSE_LSB|MPSSE_WRITE_NEG)

#define SPI_CMD_RD_BYTES_MSB_RE /* 0010 0000 */ (MPSSE_DO_READ) #define SPI_CMD_RD_BYTES_MSB_FE /* 0010 0101 */ (MPSSE_DO_READ|MPSSE_READ_NEG|MPSSE_WRITE_NEG) #define SPI_CMD_RD_BYTES_LSB_RE /* 0010 1000 */ (MPSSE_DO_READ|MPSSE_LSB) #define SPI_CMD_RD_BYTES_LSB_FE /* 0010 1101 */ (MPSSE_DO_READ|MPSSE_LSB|MPSSE_READ_NEG|MPSSE_WRITE_NEG)

I will test all theses modes with an oscilloscope to verify that it works as expected.

Hello,

I have posted the first results of my work :

http://code.google.com/p/libftdispi/

Regards,

-- Stany

Carl-Daniel Hailfinger

23 Oct 23 Oct

2:55 a.m.

On 23.10.2010 01:29, Stany MARCEL wrote:

...

On Sun, Oct 17, 2010 at 10:48 AM, Stany MARCEL stanypub@gmail.com wrote:

...
On Sat, Oct 16, 2010 at 2:20 PM, Stany MARCEL stanypub@gmail.com wrote:

...
Hello,

I want to use the FT4232 or FT2232 (with libfti) as a SPI master.

Thanks to you I have a good example of SPI code with libftdi and this device since you added it to your supported flasher.

I still don't know how to change some behavior of this component :

Clock mode

Mode 0: CPOL= 0 CPHA=0 Mode 1: CPOL= 0 CPHA=1 Mode 2: CPOL= 1 CPHA=0 Mode 3: CPOL= 1 CPHA=1

Data shift order, MSB or LSB First.

If you have any information on theses subject, I'm very interested.

Thanks in advance

Extract from FTDI Documentation : For CPOL = 0, the base (inactive) level of SCLK is 0. In this mode:

When CPHA = 0, data will be read in on the rising edge of SCLK, and

data will be clocked out on the falling edge of SCLK.

When CPHA = 1, data will be read in on the falling edge of SCLK,

and data will clocked out on the rising edge of SCLK For CPOL =1, the base (inactive) level of SCLK is 1. In this mode:

When CPHA = 0, data will be read in on the falling edge of SCLK,

and data will clocked out on the rising edge of SCLK

When CPHA =1, data will be read in on the rising edge of SCLK, and

data will be clocked out on the falling edge of SCLK.

I found the needed informations in the SPI dll given by ftdi and the ftdi.h from libftdi.h

#define SPI_CMD_WR_BYTES_MSB_RE /* 0001 0000 */ (MPSSE_DO_WRITE) #define SPI_CMD_WR_BYTES_MSB_FE /* 0001 0001 */ (MPSSE_DO_WRITE|MPSSE_WRITE_NEG) #define SPI_CMD_WR_BYTES_LSB_RE /* 0001 1000 */ (MPSSE_DO_WRITE|MPSSE_LSB) #define SPI_CMD_WR_BYTES_LSB_FE /* 0001 1001 */ (MPSSE_DO_WRITE|MPSSE_LSB|MPSSE_WRITE_NEG)

#define SPI_CMD_RD_BYTES_MSB_RE /* 0010 0000 */ (MPSSE_DO_READ) #define SPI_CMD_RD_BYTES_MSB_FE /* 0010 0101 */ (MPSSE_DO_READ|MPSSE_READ_NEG|MPSSE_WRITE_NEG) #define SPI_CMD_RD_BYTES_LSB_RE /* 0010 1000 */ (MPSSE_DO_READ|MPSSE_LSB) #define SPI_CMD_RD_BYTES_LSB_FE /* 0010 1101 */ (MPSSE_DO_READ|MPSSE_LSB|MPSSE_READ_NEG|MPSSE_WRITE_NEG)

I will test all theses modes with an oscilloscope to verify that it works as expected.

I have posted the first results of my work :

http://code.google.com/p/libftdispi/

Nice. Maybe you want to tell the libftdi authors about your project as well. They like to know who is using their library.

Regards, Carl-Daniel

-- http://www.hailfinger.org/

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Carl-Daniel Hailfinger
Stany MARCEL