PSoC™ 4 Forum Discussions

Hi,

Using CY8C4247BZI-L479, I assume it's possible

I'm planning to use 56 gpio inputs from various buttons & external signals.
Requirements:

    
• any gpio must be able to wake from "deep sleep" (preferably hibernate and stop-mode as well)
    
• gpio's should be completely interrupt-driven in run-time (as well as the requirement from sleep above)
   

I need some input on best practice and if someone knows how the "Interrupt Source Multiplexer" works behind the scenes, in sleep and if it draws any extra/considerable amount of power.

best david

I'm currently use CYBLE-012011. For my application, the CYBLE will be in deep sleep most of the time. When the MCU is up (once every minute), it performs some calculation and then go back to deep sleep again. I want to reduce the power consumption as much as possible since it will be run from a coin-cell battery. If I remember correctly, running the MCU at 3MHz consumes about 1.3mA and at 12MHz consumes about 4mA. My CYBLE module is currently running at 12MHz. If I change the system clock to 3MHz, is it going to reduce the power consumption? From my understanding, reducing the clock speed from 12MHz to 3MHz will cause the MCU to be active 4 times longer. It sounds like it is actually consume more power on average if I reduce the clock speed to 3MHz. My program is already based on the document "Designing for Low Power and Estimating Battery Life for BLE Applications" but I want to further reduce the power consumption for longer battery life.

I am using a PROC BLE Module with Psoc Creator 3.3 SP1

I wan't to modify the gnu linker script or use an alternate one. (Change Start Address and rom size)

how should I do this, at the moment this is a generated file.

greetings

Leopold Faschalek

HI! 

I'm working on a project that stores data from an IMU (MPU-9150) on a SD card. I'm using a PSoC 4 (CY8CKIT-049-4xxx). The connection between the IMU and PSoC is I2C and SPI between SD card and PSoC. To store data I have used the SDCard example as template:

https://www.element14.com/community/thread/25517/l/psoc-4-pioneer-kit-community-project050-sd-card-example?displayFullThread=true

My issue is that I am looking to store data at atleast 1KHz and at the moment it is logging at something closer to 40Hz! 

I have a feeling that the filepointer process is taking too many resources.. 

I kindly ask for some feedback. 

Hi,

The SCB based SPI limits the data rate to 8Mbps. I would like the go as high as 24Mbps. Is it possible to do with PSoC4 devices? The HFCLK is 48 Mhz. 

regards

Q1: I have problem when I am writing a UART Tx and Rx program for the PRoC 4 (CYBL10573) device. I found that all the example project used a function "UART_UartGetChar" in the generated driver to receive a byte from the UART. However this function will ignore number 0 in the receiver part. I think it assumes it is receiving ASCII string. However in my case I am receiving decimal value so I need to receive 0.

How can I check if any data is received instead of  using the "UART_UartGetChar" function?

Q2: In the examples, they are not using receive interrupt. I tried to enable the "RX FIFO not empty" internal interrupt, and trace the stack, I found that it will call "UART_SPI_UART_ISR" and then wait forever here. How can I use the interrupt?

Q3: The generated code is so complicated that it is very difficult to follow by the code. And most of the time the example project is too simple. Actually I have encountered other problem before and I want to do some study before asking question here or finding the support engineer. Is there any documents that describe how to use the generated driver code? Or a user manual for the device?

Thank you.