While(I2CBusIsIdle(WM8731_I2C_MODULE) = false) register address is 7 bit, command is 9 bit Static bool WM8731SendReg(WM8731_REGISTER reg, uint16_t cmd) This code is adapted from Microchip Audio Accessory Board

I2CSetFrequency(WM8731_I2C_MODULE, GetPeripheralClock(), WM8731_I2C_BAUDRATE) I also checked the signals with an oscilloscope and they are fine. Screenshots from the logic analyzer for both implementations (bitbang and hardware i2c) are attached. I also tried with a quick and dirty bit-bang solution and it worked without problems, so basically it should work. I tried with different baudrates (1kHz to 400kHz), but the result is always the same. If I transmit data to the slave, the Address(0x1A) + Write-Bit(0) is ACKED, but then the peripheral stops working and i get a Master-Bus-Collision error. There are pull-ups (1k) on SDA and SCL at the AudioProto board, the pull-ups on the ChipKit are not used (Jumper open). The PIC acts as Master and the WM8731 Audio Codec is the Slave. MPLAB X v2.26 in Linux - XC32 Compiler v1.33 with no optimization I have some troubles with the I2C interface of PIC32MX 250F128B. AudioProto Board from MikroE with WM8731 Chip - PicKit3 Hi, First of all my setup: - ChipKit DP32 with PIC32MX250F128B 40MHz Also a chunk is reserved for EEPROM emulation (since PIC32s don't have EEPROM) to make storing of configuration data simpler.I2C problems with PIC32MX 250F128B - Stop Bit Detected It does have a small specific bootloader section of flash separate from the main program memory, but it's too small for the bootloader code to fit into, so a chunk of the main program flash is reserved as 'overspill' space. The bootloader for that board is quite large as it contains a USB stack in it for the CDC/ACM connection. You can also edit (as root) the file /etc/group and find the 'dialout' entry and append your username to the comma separated list of users at the end of the line. You will have to reboot or log out and in again before the change will take effect. You can add yourself to the group with:ĭo not (I repeat, DO NOT) forget the -a flag or you will overwrite your existing groups and not be able to 'sudo' again.! To access serial ports on Linux (both real ones and CDC/ACM USB ones) you have to be a member of the 'dialout' group (for Debian based Linux.

Mpide wire library