I believe it is a timing issue. Please correct me if I’m wrong. Try to mimic the timings from the manual, plus a little to make sure you’re not too fast. I figure someone will know something about this since this is a very common display controller. And fix the question in the manner I described – edit, do not add a comment or even an answer as you did previously.
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Hope this is helpful. Rtos when using semaphore or mutex with lcd it run task with low priority first?
[RTOS Support] FreeRTOS LCD driver
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Sign up using Email and Password. Thread aware file system. When lfd interrupt driven transfer mode is being used, the actual number of bytes written to a peripheral may be less than the requested number if not all the bytes could be written before the peripheral’s write timeout expired.
Please enlighten me if this is not the correct approach.
You need the board support package for the EFM Every now and then after reset part of my message will show up with garbled junk in it, otherwise it’s always junk. This takes a pointer to the function you have written to add the function to those already being scheduled.
Can you read the LCD status correctly? Please read the API documentation and look at the demo applications where there are many examples.
Sign up or log in Sign up using Google. Below is a static menu. Once you have it working with delayyou might frwertos to find less blocking ways to control the LCD. I’m using vTaskDelay to control the timing for the pulses on the control lines.
Does your code always wait for DB7 to go low before any instruction?
lcd.c in freertos | source code search engine
Below is a static menu. Fail Safe File System: Posted by heinbali01 on January 6, The board support package defines the peripherals that are available to be opened. And fix the question lcv the manner I described – edit, do not add a comment or even an answer as you did previously. Some of the demo projects already use all the memory available on the hardware so to add a new task you may have to remove ,cd of the existing tasks.
Tag: freertos LCD
Be explicit in your question about which task runs when using the task names it seems clear to me that task2 will run until the semaphore take, when task1 will run until the semaphore give.
Email Required, but never shown. Sign up to receive notifications of new support topics freertox help where you can. On Tue, Jan 6, at 9: A good way to learn the system is to step through the code of the existing applications. Post as a guest Name. Getting the display into the correct mode 4- or 8-bits is tricky: Email Required, but never shown.
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Please correct me if I’m wrong. Sign up using Facebook. Thread aware file system.