Hi Gaurav More,
Now, after testing it today(this really time-consuming ), I can make the LPC4367 SPI master work, just copy your SPI code to my side, please check the details.
1. Hardware
SPI master: LPC4367 or LPC43S67, use the lpcxpress board.
SPI slave : LPC11U68, use the LPCXpresso board'
1)LPC4367 SPI pin
SPI_CLK : P3_3
SPI_MISO : P3_6
SPI_MOSI : P3_7
SPI_SSEL : P3_8, GPIO control
Note, if you use the lpcxpresso LPC4367 board, remove JS23, just disconnect it from the external flash.
2)LPC11U68
SPI_CLK : P1_29
SPI_MISO : P0_8
SPI_MOSI : P0_9
SPI_SSEL : P0_2,
Connections:
2. Software IDE
LPCXpresso v8.2.2 build650, MCUXpresso IDE also Ok.
3. Software code
Based on the LPCopen code for LPC4367 and LPC11U68
Please check my attached code for both LPC4367 and LPC11U68
If you find the LPC4367 code project is ssp,don't worry, I already delete the whole code, and use the SPI module, copy it from your code.
But I modify the transfer and receive code:
uint16_t SPI_Data_Transfer_kerry(uint16_t dummy_data,uint16_t timeout)
{
uint16_t read_data;
uint16_t Count =0;
enable_SPI_SS();
Chip_SPI_Int_FlushData(LPC_SPI); ///* Clear status */
Chip_SPI_SendFrame(LPC_SPI,dummy_data);
while((!(Chip_SPI_GetStatus(LPC_SPI) & SPI_SR_SPIF)));
read_data = Chip_SPI_ReceiveFrame(LPC_SPI);
disable_SPI_SS();
return read_data;
}I didn't add the delay, but I add clear status code.
I find your LPC11U68 have a lot of problem, you configure the as 8bit, not 16 bits, but your LPC4367 use the 16bits, so I use my own LPC11U68 code directly ,but send the same data as your LPC11U68.
4. Test result
1)LPC11U68 debug code
You can find the LPC11U68 slave can receive all the 0XA5a5 from the master side.
2)LPC4367 debug code
3) SPI bus wave
From 2) and 3), you can find the master also can receive all the correct data from the LPC11U68, I didn't add the delay which you mentioned.
The SPI baudrate is 1Mhz.
So, if you still not OK, please use my attached two projects, master and slave, then test it again.
Wish it helps you!
Have a great day,
Kerry
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Hello Kerry,
Considering your inputs mentioned above i made changes in the code and made both master and Slave device to same mode (Mode 0). Here the master device is LPC4367 and Slave is LPC11u68. Rest all the configuration are unchanged. But still i got the same result. I am not able to receive any data at the slave side.
Considering the 2nd input please find attached wave forms for your reference. Here the yellow line is for SCLK, Blue is for SSEL, pink one is for DATA (MOSI) and Green is (MISO). The data transferred is 0XA5 from master to slave and slave is suppose to send 0x55 but you can see that there is not output from salve.
I have also attached the screens shot of the status of the slave register and you can see that SR value is 16. it remains in the same manner.
Regarding the Code please find the details of the code mentioned below
System freq is 48MHz
Pin Mux Section for LPCExpresso Board:
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 29,(IOCON_FUNC1 | IOCON_MODE_INACT));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 8,(IOCON_FUNC1 | IOCON_MODE_INACT));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 9,(IOCON_FUNC1 | IOCON_MODE_INACT));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 2,(IOCON_FUNC1 | IOCON_MODE_INACT));
// Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 2,(IOCON_FUNC0 | IOCON_MODE_INACT));
SSP 0 Init Function :
pSSP = LPC_SSP0;
Chip_Clock_EnablePeriphClock(Chip_SSP_GetClockIndex(pSSP));
Chip_SSP_SetSSPClkDivider(pSSP, 1);
Chip_SYSCTL_PeriphReset(Chip_SSP_GetResetIndex(pSSP));
Chip_SSP_Set_Mode(pSSP, SSP_MODE_SLAVE);
Chip_SSP_SetFormat(pSSP, SSP_BITS_8, SSP_FRAMEFORMAT_SPI, SSP_CLOCK_MODE0);//SSP_CLOCK_CPHA0_CPOL0
Chip_SSP_SetBitRate(pSSP, 1000000);
Chip_SSP_Enable(pSSP);
while (1)
{
Chip_SSP_SendFrame(pSSP, 0x55);
while ((Chip_SSP_GetStatus(pSSP, SSP_STAT_RNE) == SET))
{
rDat = Chip_SSP_ReceiveFrame(pSSP);
}
}
Hi Gaurav More,
I have tested your code on my side, and debug the register, now it works OK on my side.
One point need to do the modification:
static void Init_SSP_PinMux(void)
{
#if (LOOPBACK_TEST == 0)
#if defined(BOARD_MANLEY_11U68)
#warning "No SSP setup defined"
#elif defined(BOARD_NXP_LPCXPRESSO_11U68)
//#warning "No SSP setup defined"
/*
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 29,(IOCON_FUNC1 | IOCON_MODE_INACT));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 8,(IOCON_FUNC1 | IOCON_MODE_INACT));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 9,(IOCON_FUNC1 | IOCON_MODE_INACT));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 2,(IOCON_FUNC1 | IOCON_MODE_INACT));
// Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 2,(IOCON_FUNC0 | IOCON_MODE_INACT));
// Chip_GPIO_SetPinDIROutput(LPC_GPIO, 0, 2 );
*/
Chip_IOCON_PinMuxSet(LPC_IOCON, 1, 29,(IOCON_FUNC1 | IOCON_MODE_INACT| IOCON_DIGMODE_EN));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 8,(IOCON_FUNC1 | IOCON_MODE_INACT| IOCON_DIGMODE_EN));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 9,(IOCON_FUNC1 | IOCON_MODE_INACT| IOCON_DIGMODE_EN));
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 2,(IOCON_FUNC1 | IOCON_MODE_INACT| IOCON_DIGMODE_EN));
#else
#error "No SSP setup defined"
#endif
#endif
}This is the test SPI bus wave:
You can find the MISO send out the 0X55 which is your needed data.
I also attached my modified project for your reference.
Your original configuration will make bit9:7 to 0, that's why your SPI slave can't work.
Wish it helps you!
Have a great day,
Kerry
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Hi Gaurav,
Now, I use LPC4357 as master, LPC11U68 as slave, I can reproduce your mentioned problem if I use the lpcopen API Chip_SSP_RWFrames_Blocking directly.
MISO have 0X55 data, but the buff still 0XFF.
I will do the deep research, any updated information on my side, will let you know!
Kerry
Hi Kerry,
I have checked the code also which i had sent you . There is a problem with that code so i have modified and checked from my side . Consider the attached code for your processing and reference. Modification in that code is done with respect to the sysinit function where the peripheral clock was not enable and in SSP Init where bit format is changed from 8 bit to 16 bit. I have tested the code from my side and I have taken the snap shot of the observation and the waveforms of SPI Communication.
Please find below the waveform of with Delay and the data received with Delay or Timeout.
Waveform Details Yellow = MOSI, Blue = MISO, Pink = Clock, Green = SSEL
You can see that the data received is 1002,1003, 1004,1005,1006 and also find attached Waveform with Delay and Data received Without Delay.
Here You can see the data is lost and 0 is received in between 1002,0,0 ,1005,1006.
Kindly go through the code and update the details accordingly.
We have check with tyour code that you have sent but but it that we did modification in master side by adding sequence of data to be sent by master to slave as mentioned below in tx buffer ,
uint16_t tx_buff[BUFFER_SIZE]={0x1234,0x5678,0x9ABC,0xDEF0,0x2345};
AS a response we are recieving wrong sequence to slave even though we are recieving correct sequence in master. see the screen shot below,
You can see that the sequence is not matching. So i request you to check it with our code of SSP since i think it is not yet resolved and the data is still not matching. Even after adding clear status line.
You can test the coe with doing the above mentioned modification and calling the polling method in while in master side and then verify.
Waiting for your response. And one omer think can we have the process that if i am responding it should reach you immediately since everey time moderators are reviwing and then you are recieving the response. What is happeing i am sending you response butyou will reciev very let and due to that there will not be any syncing in the post at at all.
Request you to let me know if i can g with some other way to respond you faster.
Hi Gaurav More,
I have tested your newest slave code, this code still have problems, this is the SPI bus wave:
Your LPC11U68 slave MISO didn't send out the correct data.
It seems you didn't test both my SPI master(LPC43S67) and slave code(LPC11U68), this is my test result with the modified master and slave:
1. SPI BUS wave
You can find both mosi and miso in the SPI bus wave is correct, which you need is：
LPC43S67 Master
Send: 0X1234, 0X5678,0X9ABC, 0XDEF0, 0X2345
Receive: 0X3ea, 0x3eb, 0x3ec,0x3ed,0x3ee
LPC11U68 Slave
Send: 0X3ea, 0x3eb, 0x3ec,0x3ed,0x3ee
Receive: 0X1234, 0X5678,0X9ABC, 0XDEF0, 0X2345
2. Master LPC43S67 debug result:
You can find both receive and transfer data is correct
3, Slave LPC11U68 debug result
You can find the slave both send and receive data is correct.
Actually, I just modify the Master send data to 0X1234, 0X5678,0X9ABC, 0XDEF0, 0X2345
So, I highly suggest you test both my master and slave in pair.
I attached the newest master and slave code for you reference .
I think, now, your slave code may still have problems, because the MISO don't have the correct data.
Actually, I use the same SPI pin as your code, so you just need to download may code to your board, you even don't need to modify the hardware, just check the data.
I can make sure my code works as your expect.
Please test it, thank you,
Any updated problem, just let me know!
Have a great day,
Kerry
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Hi Gaurav More,
That's very good to hear you also make it works with this workaround.
Yes, the user manual really didn't add the note about this point, but normally, if the register reserved area have the default data, please keep that default data, don't modify it.
Actually, in the lpcopen code, you also can find the official code also configure that area to the default data:
So, next time, if it not work, you also can check the official code configuration.
Wish it helps you!
If you have the new question in the future, welcome to create the new question post!:)
Have a great day,
Kerry
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Hi Gaurav More,
In your last email, you said:
LPC11U68:
Controller freq: 48Mhz, SSP Clock Rate: 1Mhz, Slave Mode , Mode 0
LPC4367:
Controller freq: 100Mhz, SPI Clock Rate: 1Mhz, Master Mode, Mode , Mode 0, SPI peripheral freq: 50Mhz
LPC11U68 is the slave, but why in your code, you configure it as master? Please check your attached LPC11U68 code:
Please check it again, did you meet the problem that when configure the LPC11U68 as master, and LPC4357 also the SPI master?
Please give me the clear goal, who is master, who is slave? Your problem is on the LPC11U68 or the LPC4357? If you have the problem SPI bus wave, please also set it to me.
Have a great day,
Kerry
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