UART driver under FreeRTOS on Zynq Ultrascale+ Xilinx provides UART driver example, working in BM configuration (xuartps_intr_example.c). This example utilize interrupts. Gets 1 character from the UART using FreeRTOS_read If the character is a carriage return ( r) then it calls the CLI until there is no more output (lines 167-196). Remember that when you implement a command function for the CLI, if you return pdFALSE it means that you have no more output, and if you return pdTRUE then you have more output.
This demo demonstrates the possibility to use the UART driver in the RTOS. The example writes string into, then reads back chars. After every 4B received, these are sent back on UART. I am trying to get the FreeRTOS Demo project working on my CC3200 LaunchPad board. I am running CC3200 SDK 1.2.0, and have not modified the sources in any way. I used CCS UniFlash to flash the binary into SRAM, but I don't get any data over UART.
- The demo application does. FreeRTOS IO is a POSIX style peripheral library interface extension to the FreeRTOS real time peripheral driver extension for FreeRTOS UART, I2C and SPI. FreeRTOS BSPs: 3 rd party driver packages FAT SL File System: Super lean FAT Are there UART functions in FreeRTOS which already support blocking until data ready.
- Code hangs when reaching UART API call. I checked the FreeRTOS_plus_IO UART driver for lpc17xx but for the moment it seems more simple to me to try making the.
- FreeRTOS support forum archive - addiing support for i2c communication to RTOS. Addiing support for i2c communication to RTOS. You should find a demo UART.
Hi I'm trying to use the OpenPicus devKit for a project I am working on and to my understanding the IDE, upon new project creation, creates code that basically utilizes FreeRTOS and OpenPicus libraries.
What I am trying to figure out is how to use interrupts with the FreeRTOS kernel, or through OpenPicus (i dont think this is possible). I have read that the ISRs in FreeRTOS can be specified with the __attribute__ ( ( signal ) ) directive but how are they linked to specific interrupts?(uart or even a pin just going high?)
1 Answer
Freertos Tutorial
Interrupt handling is architecture, and often compiler specific rather than specific to FreeRTOS. FreeRTOS itself only defines what RTOS calls are valid in an ISR.
The OpenPicus hardware uses a PIC24. The FreeRTOS demo code for PIC24 includes a timer interrupt and serial interrupt examples in [...]DemoPIC24_MPLABtimertest.c and [...]DemoPIC24_MPLABserialserial.c respectively. The examples use Microchip's PIC24 compiler syntax. If you are using an alternative compiler, you will need to consult its documentation.