PSoC™ 5, 3 & 1 Forum Discussions

Hello,

I have two circuit boards. One contains a PSOC4 CY8C4245PVI-482. The other contains a CY8C5868AXI-LP035 PSOC5.

The PSOC4 board monitors 12 analog sensors with the SAR. The results are converted into floating point voltage values. I have this part is working. Also, I am using a union to represent the 4 byte float as a uint8 array with 4 locations, so getting the bytes for transmission is no problem.

I need to transmit the bytes from the PSOC4 to the PSOC5 for further processing. I have the infrastructure setup in my system to use I2C for this purpose, as I am using other I2C devices.

The master is on the PSOC5 board. The slave is the PSOC4 (address 0x0A). So far, I can talk I2C from the PSOC5 board to the PSOC4 board but am having trouble having the slave talk back to the master. I have a suspicion I am not utilizing the I2C object in the most optimal way, as I have not used I2C on a PSOC yet. I have the I2C code posted for both the master and the slave.

Can anyone offer any suggestions to most effectively write the bytes back to the master? I have the project for the PSOC4 attached. The master code is too involved to post here, so I attached only the I2C header and code files.

Hey guys.

I'm fairly new to PSoC development. Just got a CY8CKIT-050 5LP Development Kit recently. I've been trying to control the brightness of an LED using the Capsense slider. I used the "CapSense CSD Design" code example to get started, and made some changes to include an output pin at P3[7] (connected to an external LED) , and a VDAC to convert the capsense position value to analog for the pin. I got the LED to turn on/off using the capsense buttons without using the VDAC. I was wondering if anyone could guide me on controlling the brightness of the led with the slider.

I've added some screenshots of my project.

Thank you.

Hi,

Recently i try to make a program to control a servomotor by giving an angle between 0° and 90°, i made the program with the main code in C where the microcontroller reads the caracter given by a matrix keyboard using pins interruptions (An assembler code which gives the equivalent character of the keyboard to A), rests '0' to convert the ASCII caracter into numbers ('0' now is 0 for example) and make a new number by multiplying by 10 the tens and adds the unit (i.e. '9''0' in LCD converts to 9*10+0 = 90).

The program works well, but i need to rewritte the program in assembler. No problem, the PWM interrups are in ASM, the GPIO interrups also, but the main.c where i multiply is in C because of the multiplications.

I know about the MAC aviable for the PSoC 1 but investigating i found a document from Cypress called "Arithmetic Libraries User Guide" where describes a subroutine that multiplies 2 8-bit numbers (just what i need because i don't use signed ints and the result is 8-bit also) but says i need to write the following line include "arith.inc", when i build the project says that inc file is not founded.

Where i can find that file? What i can do?

BTW, in the compiler i see suggestions like "MULX", "MULY", how i can use that to Multiply assuming that do this.

Greetings

hello i want to measuure voltage across on potentiometer and get the voltage on the LCD screen,how ever I asked this question befoure and a user by the name EVEGENY helped me and gave me code that its eror is about 20mV and this is great . How ever his code works by doing samples and then making avrage of this samples and getting Vout of the potentiometer on the screen . In my project i want to get the same Accuracy but doing it REAL TIME is it posbbile ?