K70 SAI transmitter not send data :(

[adampitak]

Hello

I m trying configure SAI0 as regular transmitter, everything working fine but on output I2S0_TXD0 I have no data

MCLK, I2S0_TX_FS, I2S0_TX_BCLK work good.

I push data into I2S0_TDR0 and in interrupt from SAI check FRF bit from TCSR register

Thank You for answers and help.

here is my config:

SIM_SCGC6 |= SIM_SCGC6_SAI0_MASK;

// enable I2S module

I2S0_TCR1 |= I2S_TCR1_TFW(3);

//watermark level

I2S0_TCR2 |= I2S_TCR2_MSEL(1) |				//MCLK select from CLKGEN
				I2S_TCR2_BCD_MASK |				// bit clock direction
				I2S_TCR2_DIV(0);				// from MCLK divider to BCLK (max 256)

I2S0_TCR3 |= I2S_TCR3_TCE(2);

// Transmit channel enable; TDR0=2; TDR1=1 ????

I2S0_TCR4 |=  I2S_TCR4_FRSZ(1) |			//number of words in frame
				I2S_TCR4_SYWD(31) |				//number bits in frame
				I2S_TCR4_MF_MASK |				//frame sync polarity MSB/LSB first
				I2S_TCR4_FSE_MASK |				//Frame sync early: log.0 Justified, log.1 I2S
				I2S_TCR4_FSD_MASK;				//frame sync direction

I2S0_TCR5 |= I2S_TCR5_WNW(31) |			// number of bits in next word
				I2S_TCR5_W0W(31) |				// number of bits in first word
				I2S_TCR5_FBT(31);				//first bit shiffed

I2S0_MCR |= I2S_MCR_MOE_MASK |				//MCLK generated internally
				I2S_MCR_MICS(3);				//MCLK input clock select from PLL=120 MHz

I2S0_MDR |= I2S_MDR_DIVIDE(999)|

//2722

(fract + 1)

I2S_MDR_FRACT(6);

//

MCLKout = MCLKin * -------------

//

(divide +1)

PORTE_PCR6 |= PORT_PCR_MUX(0x04);		// configure port for MCLK output
PORTE_PCR10 |= PORT_PCR_MUX(0x04);		// configure port for I2S0_TXD0
PORTE_PCR11 |= PORT_PCR_MUX(0x04);		// configure port for I2S0_TX_FS
PORTE_PCR12 |= PORT_PCR_MUX(0x04);		// configure port for I2S0_TX_BCLK

I2S0_TCSR |= I2S_TCSR_TE_MASK |				//enable transmitter
				I2S_TCSR_STOPE_MASK |			//stop enable
				I2S_TCSR_FR_MASK |				//reset fifo pointers
				I2S_TCSR_FRIE_MASK ;			//enable interrupt from watermark

[adampitak]

Problem is solved:

1. fill configuration register and fill FIFO

2. then set to "1" Transmitter enable:  I2S0_TCSR |= I2S_TCSR_TE_MASK

NOT IN REVERSE !!!!

by the way... in manual nothing say this thing!!

by the way... in TCR3 bits TCE: 16-th bit represents FIFO "0" (TDR0,TFR0)

                                               17-th bit represents FIFO "1" (TDR1,TFR1)

[gerardovaldovin]

Hello Adam.

Right now I'm having the same problems you had with SAI. I was wondering if you can send me that part of code. I really will appreciate it.

Thanks in advance.

[adampitak]

Or is there somebody who have example SAI (I2S) as transmitter for K70 ???

Thank you so much.

[egoodii]

I can only suggest my I2S/DMA example in community.freescale.com/thread/114450.  It was written for version 1 silicon, so if you have the 'version 2' SAI block in your chip, I'm afraid there will be differences.

[adampitak]

Hi thank you for response, but Your code looks like for K60... it is different I2S interface :smileysad:

Adam

[egoodii]

Sorry -- that was my concern about the 'Version 1' vs 'Version 2' silicon.

[adampitak]

But these can help, I have "Device revision number: 0" of K70FN1M0VMJ12, maybe itis old

[egoodii]

Sorry again, 'version' can be a tricky thing to pin down.  I refer specifically to the differences outlined in AN4445.pdf.  I would say your original statement is correct, in that my firmware was designed for the SSI, and newer parts have this SAI which is 'similar' but to be sure differs in some very serious ways.  Sorry I can't be of more help.

[egoodii]

Just as a 'simple statement' totally unrelated to the exact details of the SAI --- I see most of your register controls are set with 'OR-equals' operators, and I would certainly be more inclined to directly set the full contents of many of these control registers, most especially the PORT_PCR controls.

[adampitak]

Hi, Thank you for your reply, now I understand what you meant (difference between SSI and SAI),

but nothing solved my problem :smileycry:

I tried PORTE_PCR10 = PORT_PCR_MUX(0x04); and all configure register with "="

Can be problem that I´m using MQX? by the way, MQX never touch PTE10