Communications (EUSART/AUSART, I2C/SPI, USB, CAN, LIN, KeeLoq)

Communications (EUSART/AUSART, I2C/SPI, USB, CAN, LIN, KeeLoq) (p.2)
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odon

USB Host reset bus when receive packets >8B

I am trying to upgrade the Microchip USB HID keyboard example of "Report ID" support, but for unknown reason USB Host (Windows) reset the bus when receive 9 bytes transfer.data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAABBYAAAGkCAYAAACFGKZzAAAgAElEQVR4Aex9B3QVR7L2NbBgwDitA05r47jrnMkokYOJJtqLASGCSBIgMk..
2
2021/01/16 17:10:31
NVergunst

USB HID - Implement "Consumer Device" to allow Volume Up/Down Control?

I have a project that works perfectly using dummy characters ('a', 'b', and 'c') built upon the Microchip USB Keyboard example. I now need to expand my project such that I can control "multimedia buttons" such as the volume up/down keys, mute and so forth as you would find on a standard USB keybo..
25
2021/01/16 17:07:33
seyyah

dspic33ep256mc506 can bus fifo overflow handling?

I have 8 buffer locations for can receive in fifo mode. I did not see any overflow for a long test period but I want to handle every situation as usual. My test program is MCC based. I'm calling CAN1_Receive() periodically and if function returns success, I loop until there is no message to read whi..

2021/01/16 12:20:56
juliosilva

Cable length to UART at 3V

Hello, I'm developing a system with two PIC's that needs bi-directional communication. They both work at 3V VCC, and I'll use UART at 9600bps. I'll use 6 wire, crossed cable (3x2 pair) (like CAT5U ethenet cable), with 1xGND paired with 1xTX, 1xGND paired with 1xRX, and 2 other pair with VCC (3V). S..
15
2021/01/14 08:46:19
crosland

ECAN TXLARB flag

Does anyone know exactly how/when the ECAN TXLARB bit will be set. I can't find much detail in the data sheet (18F26K83): If a Tx loses arbitration is the flag set straight away or is the Tx automatically retried?If it is retried, how many times until the TXLARB flag is set?Is the Tx error counter i..
1
2021/01/11 16:01:32
oleoarruda

RFID Mifare using PIC18F26K40

Hello everyone.I'm having trouble reading MIFARE cards using the MFRC522 module. I know where the problem is, but I don't know how to fix it. I am able to communicate with the module via SPI. When I call the function to identify if there is a card, it transmits the 0x26 byte to the antenna and wai..

2021/01/11 04:29:12
OscarTheGrouch

Need help with HID Device using PIC18F2550

Hello All,I'm doing a project where I'm sending data from a PC app I'm writing that is going to a device that selects Ethernet videos and displays them. The device (don't have the name of it handy) is presently controlled via key pad that one can enter channel numbers. This key pad connects via USB ..
18
2021/01/10 18:48:41
nikolaos

Device descriptor request failed

Hello,i am using mla examples with mplabX 5.35, as a basis for developing a project with USB connectivity. I have prototyped my own boards with both pic18lf25k50 and 32mm0128gpm028 processors.I have modified the example mla projects and can get enumeration for CDC serial and MSD configurations but i..
1
2021/01/08 23:14:41
ameliaamelia

SIEMENS BSB and LPB protocol

My home-control project is based on a workstation for every room, connected with TCP/IP (PIC32 + ENC). Now I have a new device to interface: Siemens HVAC controller RVS41.813, that uses the protocol BSB and/or the LPB. Both use two polarized wires. Does anyone know these protocols? (It seems to b..
4
2021/01/06 15:17:18
Rickyz

24FJ1024GB610 Host CDC works with Library but not with Code configurator?

I have been able to get the CDC Host working on a 24FJ1024Gb610 with the library (v2018_11_26) receiving and transmitting but can not get it to work using MCC v3.75 USB Framework lite V 1.26.1 There is not much to configure, I have traced through the code and It looks like the USB_SUPPORT_BULK_TRANS..
3
2021/01/06 01:21:39

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