msp430 lcd display factory

Alphanumerical LCDs are probably the easiest devices to quickly project information visually. They are easy to use and cheap. To be able to use them, we do not need any additional hardware feature of a micro or any special communication hardware like I2C and SPI. Digital I/Os are what we need to use these displays. Just like my other tutorials, this tutorial includes three LCD examples – one with software SPI communication, one with software I2C communication and one with direct DIO-based 4-bit LCD interface.

Be sure to use 3.3V compatible LCD because most of them don’t operate at 3.3V power level. Most of the LCD are designed for 5V operation. It is okay to use 5V power supply for powering LCD if there is no other option. LCDs accept 0V – 3.3V logic level. However, there should be no way with which a 5V power supply/device can get connected with MSP430’s 3.3V power bus.

Most popularly alphanumerical LCDs are driven in 4-bit data mode and this is what that has been done here. First let’s see some typical LCD instructions.

Since alphanumerical displays utilize GPIOs, there’s hardly anything to explain here. Try not to use GPIOs that have alternate roles because you may never know when would you need their alternative functions.

Most popularly alphanumerical LCDs are driven in 4-bit data mode and this is what that has been done here. First let’s see some typical LCD instructions.

I am using a 16x2 LCD with an MSP430 and am unable to figure out how to print a value from my AtoD. My LCD is using the ST7066U driver, and the setup code for my LCD is this:

In my main code, I read an AtoD value, but I am not too sure how to display it. The AtoD works fine, I can use debug mode in Crossworks and see the AtoD value is what I am expecting. I can display text on the LCD with something like this:

I am a complete novice at this, and the code for setting up the LCD was taken from HERE and edited slightly to fit my MSP and setup. Essentially, I just want to do something like

I get an error saying too many arguments to lcd_print. I assume this means in my setup, I need to change something to the way lcd_print works, but not sure how to do this. Can someone please let me know how to edit this so I can do something along the lines of

This article is the continuation of our tutorial series on programming MSP430 using Code Composer Studio. Last tutorial was based on GPIO pins. This tutorial is about interfacing a display with MSP430, when it comes to display the 16*2 LCD Display,it is the first choice for any electronic hobbyist. Previously we have also interfaced LCD with MSP430 using Arduino IDE, in this tutorial, we will use the native Code Composer studio platform instead of using the Arduino IDE, this way as a designer, we get more flexibility.

It has an in-built IC hd44780 that can store the command and data passed to it. The LCD Module has about 16 pins. 8 of which are data pins, 4 of them are supply pins for backlight LED and the whole LCD module, 3 for controlling the operation, and 1 pin for contrast adjustment. The tutorial is based on the library created by Dennis Eichmann. It is very easy to use a library with separate functions to print different data types. It also has provisions to display the data in different forms with leading, blanked, and deleted zeroes. It is a pretty expansive and comprehensive library and is configurable to the different connections. Here, the header file is modified to accommodate an 8-pin parallel configuration for data communication.

A generic 16x2 Display has an inbuilt hd44780 IC(circled in red below), that can store the command and data passed to it. The LCD Module has about 16 pins. 8 of which are data pins, 4 of them are supply pins for backlight LED and the whole LCD module, 3 for controlling the operation, and 1 pin for contrast adjustment.

This LCD module is shown above versatile and uses minimum pins compared to other segmented LCDs. If you are curious to know how exactly all this works, you should check out the working of the 16x2 LCD display where we have already discussed how the LCD works in detail.

RS Pin: RS=1 will enable the data register in the LCD, which is used to write the values to the data register in LCD. RS=0 will enable the Instruction register of the LCD.

Enable pin: Negative edge-triggered; when the pin is changed from the HIGH state to LOW state, LCD is prompted to write to the data pins. Positive edge-triggered; when the pin is changed from the LOW state to HIGH state, LCD is prompted to read from the data pins.

The tutorial is based on the library created by Dennis Eichmann. It is very easy to use a library with separate functions to print different data types. It also has provisions to display the data in different forms with leading, blanked, and deleted zeroes. It is a pretty expansive and comprehensive library and is configurable to the different connections. Here, the header file is modified to accommodate an 8-pin parallel configuration for data communication. The library can be download from the below link, after downloading you follow the below steps to add the library to CCS.

In the properties dialog box of the hd44780 project and inside the include options for the MSP430 compiler, add the include folder in file the search path.

In the properties dialog box for the CCS_LCD project and in the file search path of MSP430 Linker tab, include the hd44780.lib located inside the debug folder of the hd44780 project. The debug folder is also included in the file search path.

void hd44780_timer_isr( void ):This is periodically called in the ISR of the Timer A. The Timer A is used to periodically do the LCD functions like clearing the screen, setting the cursor, and displaying the data. The function is to be used in the ISR. It returns nothing.

char * ch__string:The string to be written to the data buffer (inside the hd44780_timer_isrfunction). The data will be copied to the data register and instruction register of the LCD IC when the hd44780_timer_isris periodically called.

uint8_t hd44780_output_unsigned_16bit_value( uint16_t u16__value, uint8_t u8__leading_zero_handling, uint8_t u8__row, uint8_t u8__column, uint8_t u8__cr_lf ):The function will display the unsigned 16-bit value on the desired location of the LCD.

The anode of the LED backlight cannot be connected directly to a 5V supply. It should be connected to a resistance to minimize the current flow through the LCD Module. I have made my connections using a perf board to solder the LCD and then used jumper wires to connect the LCD with the MSP430 board, my set-up looks like this below but you can also simply use a breadboard to make your connections.

Inbuilt timer is being used to display values periodically. Timer A is selected with SMCLK (1MHZ) as the clock source and continuous mode being the mode of operation.

Once you have your code compiled, you can upload it to the MSP430 board, as explained in the getting started with the MSP430 tutorial. If everything goes as expected, you should see your LCD display some contrast as shown below.

The world is advancing at a high rate. The demand for high-rise buildings and factories is increasing at a fast rate having the possibility of fire and gas leakage due to their crowded and complex structure. With the modernization and growth of the country, security is becoming a challenge for human beings. This paper presents a low-cost solution device against fire and gas leakage hazardous situations. The device is made up of an MSP430 microcontroller along with fire and gas sensors. This device alerts the user after sensing the alarming situation i.e., fire and gas leakages. It will buzzer the alarm, turn on the blinking LED, and display the emergency status on liquid crystal display (LCD).

MSP430F110, MSP430F1101, MSP430F1101A, MSP430F1111A, MSP430F112, MSP430F1121, MSP430F1121A, MSP430F1122, MSP430F1132, MSP430F122, MSP430F1222, MSP430F123, MSP430F1232, MSP430F133, MSP430F135, MSP430F147, MSP430F1471, MSP430F148, MSP430F1481, MSP430F149, MSP430F1491, MSP430F155, MSP430F156, MSP430F157, MSP430F1610, MSP430F1611, MSP430F1612, MSP430F167, MSP430F168, MSP430F169, MSP430F169-M

MSP430F2001, MSP430F2002, MSP430F2003, MSP430F2011, MSP430F2012, MSP430F2013, MSP430F2101, MSP430F2111, MSP430F2112, MSP430F2121, MSP430F2122, MSP430F2131, MSP430F2132, MSP430F2232, MSP430F2234, MSP430F2252, MSP430F2254, MSP430F2272, MSP430F2274, MSP430F233, MSP430F2330, MSP430F235, MSP430F2350, MSP430F2370, MSP430F2410, MSP430F2416, MSP430F2417, MSP430F2418, MSP430F2419, MSP430F247, MSP430F2471, MSP430F248, MSP430F2481, MSP430F249, MSP430F2491, MSP430F2616, MSP430F2617, MSP430F2618, MSP430F2619

MSP430G2001, MSP430G2101, MSP430G2102, MSP430G2111, MSP430G2112, MSP430G2113, MSP430G2121, MSP430G2131, MSP430G2132, MSP430G2152, MSP430G2153, MSP430G2201, MSP430G2202, MSP430G2203, MSP430G2210, MSP430G2211, MSP430G2212, MSP430G2213, MSP430G2221, MSP430G2230, MSP430G2231, MSP430G2232, MSP430G2233, MSP430G2252, MSP430G2253, MSP430G2302, MSP430G2303, MSP430G2312, MSP430G2313, MSP430G2332, MSP430G2333, MSP430G2352, MSP430G2353, MSP430G2402, MSP430G2403, MSP430G2412, MSP430G2413, MSP430G2432, MSP430G2433, MSP430G2444, MSP430G2452, MSP430G2453, MSP430G2513, MSP430G2533, MSP430G2544, MSP430G2553, MSP430G2744, MSP430G2755, MSP430G2855, MSP430G2955

MSP430F412, MSP430F412-FW, MSP430F413, MSP430F413-FW, MSP430F4132, MSP430F415, MSP430F415-FW, MSP430F4152, MSP430F417, MSP430F417-FW, MSP430F423, MSP430F4230, MSP430F423A, MSP430F423A, MSP430F425, MSP430F4250, MSP430F425A, MSP430F425A, MSP430F4260, MSP430F427, MSP430F4270, MSP430F427A, MSP430F427A, MSP430F435, MSP430F435-100P, MSP430F4351, MSP430F436, MSP430F436-100P, MSP430F4361, MSP430F437, MSP430F437-100P, MSP430F4371, MSP430F447, MSP430F448, MSP430F4481, MSP430F449, MSP430F4491, MSP430F4616, MSP430F46161, MSP430F4617, MSP430F46171, MSP430F4618, MSP430F46181, MSP430F4619, MSP430F46191, MSP430F47126, MSP430F47127, MSP430F47163, MSP430F47166, MSP430F47167, MSP430F47173, MSP430F47176, MSP430F47177, MSP430F47183, MSP430F47186, MSP430F47187, MSP430F47193, MSP430F47196, MSP430F47197, MSP430F477, MSP430F478, MSP430F4783, MSP430F4784, MSP430F479, MSP430F4793, MSP430F4794

MSP430FE423, MSP430FE4232, MSP430FE423A, MSP430FE423A, MSP430FE4242, MSP430FE425, MSP430FE4252, MSP430FE425A, MSP430FE425A, MSP430FE427, MSP430FE4272, MSP430FE427A, MSP430FE427A

MSP430FG4250, MSP430FG4260, MSP430FG4270, MSP430FG437, MSP430FG438, MSP430FG439, MSP430FG4616, MSP430FG4617, MSP430FG4618, MSP430FG4619, MSP430FG477, MSP430FG478, MSP430FG479

MSP430BT5190, MSP430F5131, MSP430F5132, MSP430F5151, MSP430F5152, MSP430F5171, MSP430F5172, MSP430F5212, MSP430F5213, MSP430F5214, MSP430F5217, MSP430F5218, MSP430F5219, MSP430F5222, MSP430F5223, MSP430F5224, MSP430F5227, MSP430F5228, MSP430F5229, MSP430F5232, MSP430F5234, MSP430F5237, MSP430F5239, MSP430F5242, MSP430F5244, MSP430F5247, MSP430F5249, MSP430F5252, MSP430F5253, MSP430F5254, MSP430F5255, MSP430F5256, MSP430F5257, MSP430F5258, MSP430F5259, MSP430F5304, MSP430F5308, MSP430F5309, MSP430F5310, MSP430F5324, MSP430F5325, MSP430F5326, MSP430F5327, MSP430F5328, MSP430F5329, MSP430F5333, MSP430F5335, MSP430F5336, MSP430F5338, MSP430F5340, MSP430F5341, MSP430F5342, MSP430F5358, MSP430F5359, MSP430F5418, MSP430F5418A, MSP430F5419, MSP430F5419A, MSP430F5435, MSP430F5435A, MSP430F5436, MSP430F5436A, MSP430F5437, MSP430F5437A, MSP430F5438, MSP430F5438A, MSP430F5500, MSP430F5501, MSP430F5502, MSP430F5503, MSP430F5504, MSP430F5505, MSP430F5506, MSP430F5507, MSP430F5508, MSP430F5509, MSP430F5510, MSP430F5513, MSP430F5514, MSP430F5515, MSP430F5517, MSP430F5519, MSP430F5521, MSP430F5522, MSP430F5524, MSP430F5525, MSP430F5526, MSP430F5527, MSP430F5528, MSP430F5529, MSP430F5630, MSP430F5631, MSP430F5632, MSP430F5633, MSP430F5634, MSP430F5635, MSP430F5636, MSP430F5637, MSP430F5638, MSP430F5658, MSP430F5659, MSP430SL5438A

MSP430F6433, MSP430F6435, MSP430F6436, MSP430F6438, MSP430F6458, MSP430F6459, MSP430F6630, MSP430F6631, MSP430F6632, MSP430F6633, MSP430F6634, MSP430F6635, MSP430F6636, MSP430F6637, MSP430F6638, MSP430F6658, MSP430F6659, MSP430F6720, MSP430F6720A, MSP430F6721, MSP430F6721A, MSP430F6723, MSP430F6723A, MSP430F6724, MSP430F6724A, MSP430F6725, MSP430F6725A, MSP430F6726, MSP430F6726A, MSP430F6730, MSP430F6730A, MSP430F6731, MSP430F6731A, MSP430F6733, MSP430F6733A, MSP430F6734, MSP430F6734A, MSP430F6735, MSP430F6735A, MSP430F6736, MSP430F6736A, MSP430F6745, MSP430F67451, MSP430F67451A, MSP430F6745A, MSP430F6746, MSP430F67461, MSP430F67461A, MSP430F6746A, MSP430F6747, MSP430F67471, MSP430F67471A, MSP430F6747A, MSP430F6748, MSP430F67481, MSP430F67481A, MSP430F6748A, MSP430F6749, MSP430F67491, MSP430F67491A, MSP430F6749A, MSP430F67621, MSP430F67621A, MSP430F67641, MSP430F67641A, MSP430F6765, MSP430F67651, MSP430F67651A, MSP430F6765A, MSP430F6766, MSP430F67661, MSP430F67661A, MSP430F6766A, MSP430F6767, MSP430F67671, MSP430F67671A, MSP430F6767A, MSP430F6768, MSP430F67681, MSP430F67681A, MSP430F6768A, MSP430F6769, MSP430F67691, MSP430F67691A, MSP430F6769A, MSP430F6775, MSP430F67751, MSP430F67751A, MSP430F6775A, MSP430F6776, MSP430F67761, MSP430F67761A, MSP430F6776A, MSP430F6777, MSP430F67771, MSP430F67771A, MSP430F6777A, MSP430F6778, MSP430F67781, MSP430F67781A, MSP430F6778A, MSP430F6779, MSP430F67791, MSP430F67791A, MSP430F6779A

MSP430FR2000, MSP430FR2032, MSP430FR2033, MSP430FR2100, MSP430FR2110, MSP430FR2111, MSP430FR2153, MSP430FR2155, MSP430FR2310, MSP430FR2311, MSP430FR2353, MSP430FR2355, MSP430FR2422, MSP430FR2433, MSP430FR2475, MSP430FR2476, MSP430FR2512, MSP430FR2522, MSP430FR2532, MSP430FR2533, MSP430FR2632, MSP430FR2633, MSP430FR2675, MSP430FR2676, MSP430FR2672, MSP430FR2673

MSP430FR5041, MSP430FR5043, MSP430FR50431, MSP430FR5720, MSP430FR5721, MSP430FR5722, MSP430FR5723, MSP430FR5724, MSP430FR5725, MSP430FR5726, MSP430FR5727, MSP430FR5728, MSP430FR5729, MSP430FR5730, MSP430FR5731, MSP430FR5732, MSP430FR5733, MSP430FR5734, MSP430FR5735, MSP430FR5736, MSP430FR5737, MSP430FR5738, MSP430FR5739, MSP430FR5847, MSP430FR58471, MSP430FR5848, MSP430FR5849, MSP430FR5857, MSP430FR5858, MSP430FR5859, MSP430FR5867, MSP430FR58671, MSP430FR5868, MSP430FR5869, MSP430FR5870, MSP430FR5872, MSP430FR58721, MSP430FR5887, MSP430FR5888, MSP430FR5889, MSP430FR58891, MSP430FR5922, MSP430FR59221, MSP430FR5947, MSP430FR59471, MSP430FR5948, MSP430FR5949, MSP430FR5957, MSP430FR5958, MSP430FR5959, MSP430FR5962, MSP430FR5964, MSP430FR5967, MSP430FR5968, MSP430FR5969, MSP430FR59691, MSP430FR5970, MSP430FR5972, MSP430FR59721, MSP430FR5986, MSP430FR5987, MSP430FR5988, MSP430FR5989, MSP430FR59891, MSP430FR5992, MSP430FR5994, MSP430FR59941

MSP430FR6005, MSP430FR6007, MSP430FR6037, MSP430FR60371, MSP430FR6035, MSP430FR6041, MSP430FR6043, MSP430FR60431, MSP430FR6045, MSP430FR6047, MSP430FR60471, MSP430FR6820, MSP430FR6822, MSP430FR68221, MSP430FR6870, MSP430FR6872, MSP430FR68721, MSP430FR6877, MSP430FR6879, MSP430FR68791, MSP430FR6887, MSP430FR6888, MSP430FR6889, MSP430FR68891, MSP430FR6920, MSP430FR6922, MSP430FR69221, MSP430FR6927, MSP430FR69271, MSP430FR6928, MSP430FR6970, MSP430FR6972, MSP430FR69721, MSP430FR6977, MSP430FR6979, MSP430FR69791, MSP430FR6987, MSP430FR6988, MSP430FR6989, MSP430FR69891