PSoC™ 5, 3 & 1 Forum Discussions

 i want to store fpga program file .pdb for microsemi igloo in psoc and use it how can this be done?

Hi Guys,

I am having some trouble with the SPI. I have looked through the site and found some documents but not a worked example.

The code is ported across from a Microchip project. The Devie is PSOC 5LP and the memory is FM25W256-G.

The code runs until the second line in the ReadByte routine and appears to hang. I have the SPI component set to Mode 0 and 4MHz using internal clock source. Does my code below look correct? Or is there something I need to enable or initialise? Thanks in advance for your help.

#define WREN 0x06

#define MEMWRITE 0x02

#define MEMREAD 0x03

unsigned char Muted;

unsigned char testbyte;

void SendByte(unsigned short MemAddress, unsigned char MemData)  //FM25W256-G Device

{

  MEM_EN_Write(false);    //Enable Write function

  SPI_WriteByte(WREN);   

  MEM_EN_Write(true);

  MEM_EN_Write(false);   //Send Write command

  SPI_WriteByte(MEMWRITE);  

  SPI_WriteByte(MemAddress >> 8);  //Send 16-bit Address, MSB first

  SPI_WriteByte(MemAddress);

  SPI_WriteByte(MemData);  //Send Data byte

  MEM_EN_Write(true);

}

unsigned char ReadByte(unsigned short MemAddress)

{

  unsigned char i;

  MEM_EN_Write(false);   //Send Read Command

  SPI_WriteByte(MEMREAD);   //************************ LOCKS UP on this line ********************

  SPI_WriteByte(MemAddress >> 8);  //Read Address, MSB fist

  SPI_WriteByte(MemAddress);

  i = SPI_ReadByte();   //Read the byte ????

  MEM_EN_Write(true);

  return i;

}

void init(void)

{

    CyGlobalIntEnable; 

    PWM_Start();

    SPI_Init();

}

int main()

{ 

  init();

    SendByte(0x01, 0x33);

    testbyte = ReadByte(0x01);  //Test byte should = 0x33

   for(;;) {}

Ive been using the auto generated ISR's and am trying to use the Custom ISR's using the CY_ISR_PROTO() approach.

The compiler keeps telling me that " isr_1_StartEx(whatever)"  is a undeclared identifier "whatever"

Any Ideas? Im sure it is something simple......

Hi

Through some option exploring, I attempted the use of both the PSOC's internal and TI serial based ADS7818 converters. I started messing with the Sigma Delta converter and concluded its noise immunity suits my application best.

Therfore, I can sample at a lower rate, average less, and use less memory when transmitting samples over UARTs.

The one drawback is the PSOC 5 only has 1 Sigma Delta converter, and I need to monitor two shunts. There is a sequencing SAR converter, but no sequencing Sigma Delta. An app note I found suggested using the analog mux.

The attached project shows how I implemented it. I am receiving an asynchronus path warning. I am thinking using a clock to control the select object is not the best idea? Prior to every edge of the ACLK, the mux alternates between channels 0 and 1. The DMA thus stores every other sample as one shunt's reading, and the other offset, the other shunt. Is there a better way of sequencing? Despite the warning, the system appears to be working, but I may be paying some kind of noise penalty.

Hi folks,

I'm new to PSoC, but it looks like it might be good for my design, largely by saving a bunch of grief on routing a very small board.

My question is about the best practice for duplicating functionality that I already have: The current design uses a dsPIC, which has 4x PWM generators, with 2 pins per. The pins can be selected to be digital GPIO, or PWM output, or inverted PWM output.

I'm driving a TI DRV8833 chip, which has 2 inputs, which are connected to the 2 PWM outputs. For each direction, one of the pins is enabled, while the other is left as a digital GPIO. Switching directions then just switches which one of those output pins is enabled. Then the GPIO sets the coast/brake mode of the motor.

How should I go about mimicking this funcionality the PSoC 5? For each PWM channel, should I use a single PWM block with the pwm1 and pwm2 routed directly to output pins, and then just setting the cmp1 and cmp2 values will effectively determine which output is acting like a constant high/low GPIO, and which is PWMing?

The other wrinkle is that we are doing speed sending with a PWM holdoff (95% of the counter period), where the 95% count mark triggers the ADc conversion (differential, across motor). It looks like replicating this functionality means that I'd use one of the cmp1/cmp2 values to set this event at 0.95*period, and then use one of the pwm1/pwm2 outputs to trigger start-of-conversion on the ADC. But if I do that, then I need to figure out the output switching. Just build the output logic with 2 mux's and some logic gates?

Of course, if I could get this worked out into a whole submodule that has just a duty cycle value register, a direction bit, and a coast/brake bit, that would be super.

Any advice on this would be appreciated. We chose the previous part originally because it was a "motor control" variant, which made the described application quite straightforward.

Thanks,
Andrew

I purchased some QSPI ADCs that I am attempting to use with the PSOC SPI object,

http://www.mouser.com/ds/2/405/sbas078-98888.pdf

The SPIM_ReadRXData() does not work for some reason. It appears the reason why is the SPI object is not activating upon ReadRXData. According to the datasheet, the ReadRXData only reads the buffer, and does not generate activity on the bus. My scope is not detecting any.

Should ReadRXData generate bus activity? If not, how do you read from read only SPI devices like the ADS7818 with the SPI object?

I seem to get the example code breaking once the file is over a certain size.

I've uploaded small, 5kB projects via the bootloader without a problem, but once  I try to upload a larger file, 43kB, the bootloading fails just after the half way mark. Bootloader_host_gui.exe doesn't crash, but doe provide an error, and provides an error when I retry, this happens almost instantly.

I'm using a custom PCB with an FTDI232 as a USB to UART chip. Windows 8 and 7 seem to have the same results.

Has anyone come in contact with this or similar problem and is there a fix out there?

Thanks