Tinkering TI MSP430F5529
USB Module Overview
The USB module of MSP430F5529 is not very difficult to use. TI has provided some working deploy-able examples in their 430ware software suite. However, some explanation is needed at first to get started. We will go through two basic USB module examples – USB CDC and USB HID.
In simple terms, USB CDC is a USB mode with which we can emulate virtual serial COM ports and USB HID is another common USB mode with which we can make devices like USB keyboard, mouse, input devices, printer, scanner, etc as well as other similar I/O devices. MSP430F5529 also supports mass storage class. In all cases, we create a way to make our MSP430 micro communicate with a host device.
Now let’s see what we need to get started with USB coding. Apart from driverlib files and personal libraries we will need additional libraries for USB software development. Note the following folders:
- USB API Folder
- USB_app Folder
- USB_config Folder
Apart from these we’ll need some important files too:
- Hal header and source files
- system_pre_init source file
Fortunately for us we don’t have to change anything in these files/folders. We just have to add them in our USB projects and the process of adding doesn’t need any special attention. Alternatively, we can simply copy example USB projects from MSP430ware and have them customized as per need.
Very briefly speaking, USB API folder, sub-folders and files in them are what describe a specific USB mode’s working. They list relevant functions for a given mode. USB_app folder and associated files further elaborate these operations. USB devices need descriptors and USB_config folder and files contain them. Hal source and header files contain clock and GPIO setups and system_pre_init basically contains nothing except watchdog setup.
Shown below is the folder tree of a typical USB project. All I stated so far is what boils down to this folder tree.
In the main, all of the aforementioned files are included as shown below:
#include "driverlib.h" #include "USB_config/descriptors.h" #include "USB_API/USB_Common/device.h" #include "USB_API/USB_Common/usb.h" #include "USB_API/USB_CDC_API/UsbCdc.h" #include "USB_app/usbConstructs.h" #include "hal.h"
Pay attention to these functions shown below:
PMM_setVCore(PMM_CORE_LEVEL_2); USBHAL_initPorts(); USBHAL_initClocks(8000000); USB_setup(TRUE, TRUE);
Clock setting is very important because USB hardware is clock sensitive. FLL is used for both MCLK and USB clock. It is also necessary to set the right level for PMM core. Usually level 2 is preferred as the clock speed is 8MHz. On start-up, all GPIO ports are driven low to avoid floating input and unwanted EMI-related issues. This causes some additional power consumption. Thus, it is recommended to setup GPIOs for other tasks after initial USB port initialization. Please refer to TI’s official docs for additional info.
If you are not using official TI boards or equivalents and designing stuffs on your own then pay attention to USB hardware design considerations. EMC considerations are also needed to focused more alongside good PCB layout practices.
In addition to these, we can develop our own customized PC/mobile applications with Visual C Sharp (C#), Visual Basic or some other similar computer programming languages. This part is beyond the scope of this tutorial and won’t be discussed.
I am surprised and happy to find this tutorial on the F5529 as TI makes a lot of different devices.
Thank you very much for putting in the extra knowledge in each segment, made reading worthwhile.
lovely tutorial but to be honest I don’t think I’d be investing my time on this board to start with it’s not cheap and readily available as the stm32 boards can you please do more tutorials on stm32 board’s and the stc micros thanks
Hello, I try to program MSP430FR6047 but i get error “the debug interface to the device has been secured”. when flashing using uniflash and when program using CCS this happen. can you help me to solve this problem
You can try “On connect, erase user code and unlock the device” option.
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I am doing project of msp430g2553 interface(using i2c communication) with temp 100(temperature sensor) and try to read the temperature in dispaly(16*2) but didn’t get the out put (using code composer studio) can u share me any example code for this project
Thank you sir,
Which sensor? Did you use pullup resistors for SDA-SCL pins?
Where is lcd_print.h?
All files and docs are here:
You want the truth? TI makes and sell “underpowered micros”, you know? Low everything, not only the power but also peripherals. So the price is not justified.
Otherwise, if I’ll move there, I’ll introduce them to my small hobby projects – there are still some advantages.
I may even make a visual configuration tool of my own for them…
Yeah the prices of TI products are higher than other manufacturers but I don’t think the hardware peripherals are inferior.
Not inferior but in not enough numbers compared to STM32.