msp430 lcd display code for sale

LCDs are very easy to get, adafruit has a nice one, as does sparkfun. If you are going to buy one it would be useful consider these two characteristics:

The MSP430 (like most MCUs today) runs on 3.3-3.5V. If you get an LCD module that takes 5V then be prepared to either have separate voltage sources for your MCU and LCM or have the ability to step up/down your voltage source. Here"s a link that has some ideas on how to do this. Texas Iinstruments has a document that describes 1.5V to 5V boost conversion mechanisms. For my own setup I just used approx 4.3V voltage source (from 3 AA batteries) to power the LCM and used a simple diode on the same source to achieve a forward drop to source the MSP430. This is ok for prototyping but hardly a long term solution.

Some LCD modules also support a serial interface. This uses much fewer pins and is therefore great to use with MCUs that have a low pin count. However the interfacing for that is quite different than the and will not be discussed here.

Here"s how the MCU pins are interfaced to the LCM. If you use different connections then update the #define"s in the code to reflect your connections.

This is all the code for the MSP430 LCD driver. A simple flow is demonstrated in the main() function. This code should be copy-paste runnable on the value line part plugged into the shipping launchpad. If things aren"t working it might be because your LCD module is slower.  Try extending the __delay_cycles, first in the Initialization routine. If that doesn"t fix it extend the delay time in the pulse module as well.

Lcd16x2Now there is a protruding rectangular portion on this LCD. This will help you identify which pin is which. Now let us see what each pin does exactly. But then they have also printed 16 and 1 on the back of LCD, so no need to worry about connecting the pins inverted.

So basically when you vary the pot , you get different values of voltage from the voltage divider network. And thus you can change the contrast to suit your visual needs. (Caution: Do not give the LCD voltage greater than 5 Volts. Your LCD may get damaged. By more I"m not talking about 5.1 Volts but 6 V and beyond.)

RS : This stands for register select. The two registers in LCD are the data register and the command word/code register. In order to tell LCD that the bits on databus are for which register we make use of RS control signal via the RS pin. When you make this pin high you select data register, where you"ll send the ASCII values to be displayed on screen. When you make RS low you select the command word register where you"ll be sending all the commands for configuring and initializing the LCD.

R/W : This stands for read or write. The read is active high signal and write is active low. Thus when you want to read from the LCD you make the signal on this pin high and when you want to write you make the signal on this pin low.

E : This stands for enable. This is a edge triggering signal which is used while writing or reading data to/from LCD respectively. E line is negative edge triggered for write while it is positive edge triggered for the read. The timing diagram given in datasheet tells about the minimum delay between the level transitions.

Busy Flag : The concept of busy flag is beautiful. Now the LCD internal processor takes time to latch and make the necessary adjustments as per the command word. While the LCD"s internal processor is busy this flag is set. So one should check the status of this flag before sending the next command word or data. D7 is the busy flag pin. You"ll have to configure the port pin connected to D7 pin as input while checking the flag condition. Along with this we need to make RS = 0 and R/W = 1 , since this is read operation and busy flag is given by command code register mode.

Well you can give delays also for LCD to finish work, but this is better way if you have enough port pins. Because for reading busy flag status you need R/W signal and thus a port pin.

Using the above table you can make any command byte. For example we"ll be using this LCD in 8 bit mode so make DL = 1, N = 1 and F =0 respectively. The hexadecimal value that we get is 0x38/038h. This is the command word that we must send to the LCD to initialize it in 8 bit mode and use 2 lines with 5x7 dots.

So these are few of the instruction codes that you come across frequently. Of course you can make these on your own by using the command code syntax table.

Display data random access memory. This is where the data you send to data register is stored. And it so happens that you can send the address of block to the command code register to position the cursor at that particular block. For example you want to position the cursor at row 2 column 10 , just send 0CAh to the command code register. So that is about the DDRAM and positioning the cursor.

The MIDIS LCD datasheet is available here. The code written in C++ makes use of the Energia Wire library that has been ported from Arduino Wire for the I2C interface.

The I2C interface is a serial bus that allows for synchronous transmission of data in a serial fashion. It requires two lines one for the clock and one for the data. A ground connection is also required. The SDA and SCL lines require external pull-up resistors, typically 4-10k. These are required as the devices attached to the bus only pull the data line low to indicate a zero and a one is indicated by letting the line float (open drain). The MSP430G2553 uses pins P1.7 for the Serial Data (SDA) and P1.6 for the Serial Clock (SCL).

To install this library within Energia download and extract the LCD library folder into your libraries sub-directory of your Energia sketchbook directory.

This is a library to interface Nokia 6610 (6100, 6610, 7210, 7250 and 5100) color LCD displays with MSP430s. The code is specific to the displays containing Philips PCF8833 controllers (see below for details).

Nokia 6610 (6100, 6610, 7210, 7250 and 5100) LCDs (and knock-offs) are 132x132 displays supporting 4096 colors, and for whatever reason, are easily available and very inexpensive.

There are many projects available around the net for interfacing these displays with various microcontrollers. But there were none for interfacing them with MSP430s (which happen to be my favourite due to the MSP430 Launchpads). This library addresses that.

These displays do have quirks of their own, but those are fairly minor compared to the advantages. One of the quirks is that these aren"t made for hobbyists (obviously). Therefore, the connector is small, and delicate. While there are breakout boards available that make it easier to connect these, you still have to be careful not to put too much pressure on the connectors.

The other quirk is that these displays are driven by one of the two controllers: Philips PCF8833 or Epson S1D15G00. And it"s not easy to tell which controller is in the display you"ve bought. There are minor differences in the controllers that can cause some confusion.

Port 2 can be used to provide the six data signals required to control the LCD.   Note how the LCD is connected to the breadboard and that wires can be connected to the pins as shown in figure 1. There is a four bit interface for the data (D4-D7), a RS (select command versus text) and an enable (E).   Figure 2 shows the other required connections as well. The datasheet for the LCD can be found here GDM1602K-Extended.pdf.  The commands are correct but the electrical specifications may vary between LCDs so make sure you have the correct datasheet for your specific LCD (3.3V versus 5.0V for instance)

Specific to this lab and the corresponding lcd_lib files we will setup the LCD to use all six available pins in Port 2 to write directly to the 16 x 2 LCD in 4-bit operation using only the most significant data nibble.

Show the TA your code, functional board and answer questions posed. 20% credit for functional code and 80% credit for correct answers about the code.  You will be expected to explain every line of code for full credit.

Photo of two experimenter boards for the MSP430 chipset by Texas Instruments. On the left the larger chip version, on the right a small version in USB format.

The MSP430 is a mixed-signal microcontroller family from Texas Instruments, first introduced on 14 February 1992.CPU, the MSP430 is designed for low cost and, specifically, low power consumption

The MSP430 can be used for low powered embedded devices. The current drawn in idle mode can be less than 1 µA. The top CPU speed is 25 MHz. It can be throttled back for lower power consumption. The MSP430 also uses six different low-power modes, which can disable unneeded clocks and CPU. Further, the MSP430 can wake-up in times under 1 microsecond, allowing the controller to stay in sleep mode longer, minimizing average current use.

Some less usual peripheral options include comparators (that can be used with the timers to do simple ADC), on-chip operational amplifiers (op-amp) for signal conditioning, 12-bit digital-to-analog converter (DAC), liquid crystal display (LCD) driver, hardware multiplier, USB, and direct memory access (DMA) for ADC results. Apart from some older erasable programmable read-only memory (EPROM, such as MSP430E3xx) and high volume mask ROM (MSP430Cxxx) versions, all of the devices are in-system programming enabled via Joint Test Action Group (JTAG), full four-wire or Spy-Bi-Wire), a built in bootstrapping loader (BSL) using UART such as RS-232, or USB on devices with USB support. No BSL is included in F20xx, G2xx0, G2xx1, G2xx2, or I20xx family devices.

There are, however, limits that preclude its use in more complex embedded systems. The MSP430 does not have an external memory bus, so it is limited to on-chip memory, up to 512 KB flash memory and 66 KB random-access memory (RAM), which may be too small for applications needing large buffers or data tables. Also, although it has a DMA controller, it is very difficult to use it to move data off the chip due to a lack of a DMA output strobe.

Six general generations of MSP430 processors exist. In order of development, they are: "3xx generation, "1xx generation, "4xx generation, "2xx generation, "5xx generation, and "6xx generation. The digit after the generation identifies the model (generally higher model numbers are larger and more capable), the third digit identifies the amount of memory included, and the fourth, if present, identifies a minor model variant. The most common variation is a different on-chip analog-to-digital converter.

The MSP430x1xx Series is the basic generation without an embedded LCD controller. They are generally smaller than the "3xx generation. These flash- or ROM-based ultra-low-power MCUs offer 8 MIPS, 1.8–3.6 V operation, up to 60 KB flash, and a wide range of analog and digital peripherals.

The MSP430F2xx Series are similar to the "1xx generation, but operate at even lower power, support up to 16 MHz operation, and have a more accurate (±2%) on-chip clock that makes it easier to operate without an external crystal. These flash-based ultra-low power devices offer 1.8–3.6 V operation. Includes the very-low power oscillator (VLO), internal pull-up/pull-down resistors, and low-pin count options.

The MSP430G2xx Value Series features flash-based Ultra-Low Power MCUs up to 16 MIPS with 1.8–3.6 V operation. Includes the Very-Low power Oscillator (VLO), internal pull-up/pull-down resistors, and low-pin count options, at lower prices than the MSP430F2xx series.

The MSP430x3xx Series is the oldest generation, designed for portable instrumentation with an embedded LCD controller. This also includes a frequency-locked loop oscillator that can automatically synchronize to a low-speed (32 kHz) crystal. This generation does not support EEPROM memory, only mask ROM and UV-eraseable and one-time programmable EPROM. Later generations provide only flash memory and mask ROM options. These devices offer 2.5–5.5 V operation, up to 32 KB ROM.

The MSP430x4xx Series are similar to the "3xx generation, but include an integrated LCD controller, and are larger and more capable. These flash or ROM based devices offers 8–16 MIPS at 1.8–3.6 V operation, with FLL, and SVS. Ideal for low power metering and medical applications.

Other integrated peripherals: SCAN_IF, ESP430, 12-bit DAC, Op Amps, RTC, up to 2 16-bit timers, watchdog timer, basic timer, brown-out reset, SVS, USART module (UART, SPI), USCI module, LCD Controller, DMA, 16×16 & 32x32 multiplier, Comparator_A, temperature sensor, 8 MIPS CPU Speed

The MSP430x5xx Series are able to run up to 25 MHz, have up to 512 KB flash memory and up to 66 KB RAM. This flash-based family features low active power consumption with up to 25 MIPS at 1.8–3.6 V operation (165 uA/MIPS). Includes an innovative power management module for optimal power consumption and integrated USB.

The MSP430x6xx Series are able to run up to 25 MHz, have up to 512 KB flash memory and up to 66 KB RAM. This flash-based family features low active power consumption with up to 25 MIPS at 1.8–3.6 V operation (165 uA/MIPS). Includes an innovative power management module for optimal power consumption and integrated USB.

Other integrated peripherals: USB, LCD, DAC, Comparator_B, DMA, 32x32 multiplier, power management module (BOR, SVS, SVM, LDO), watchdog timer, RTC, Temp sensor

Other integrated peripherals: LCD Controller, up to 2 16-bit timers, watchdog timer, RTC, power management module (BOR, SVS, SVM, LDO), USCI module, DMA, 32x32 multiplier, Comp B, temperature sensor

Other possible integrated peripherals: MPU, up to 6 16-bit timers, watchdog timer, RTC, power management module (BOR, SVS, SVM, LDO), USCI module, DMA, multiplier, Comp B, temperature sensor, LCD driver, I2C and UART BSL, Extended Scan Interface, 32 bit multiplier, AES, CRC, signal processing acceleration, capacitive touch, IR modulation

The Low Voltage Series include the MSP430C09x and MSP430L092 parts, capable of running at 0.9 V. These 2 series of low voltage 16-bit microcontrollers have configurations with two 16-bit timers, an 8-bit analog-to-digital (A/D) converter, an 8-bit digital-to-analog (D/A) converter, and up to 11 I/O pins.

The MSP430BQ1010 16-bit microcontroller is an advanced fixed-function device that forms the control and communications unit on the receiver side for wireless power transfer in portable applications. MSP430BQ1010 complies with the Wireless Power Consortium (WPC) specification. For more information, see Contactless Power

Automotive MSP430 microcontrollers (MCUs) from Texas Instruments (TI) are 16-bit, RISC-based, mixed-signal processors that are AEC-Q100 qualified and suitable for automotive applications in environments up to 105 °C ambient temperature. LIN compliant drivers for the MSP430 MCU provided by IHR GmbH.

MSP430 devices are very popular in harsh environments such as industrial sensing for their low power consumption and innovative analog integration. Some harsh environment applications include transportation/automotive, renewable energy, military/space/avionics, mineral exploration, industrial, and safety & security.

Note that when the flash size is over 64K words (128 KBytes), instruction addresses can no longer be encoded in just two bytes. This change in pointer size causes some incompatibilities with previous parts.

The MSP430 peripherals are generally easy to use, with (mostly) consistent addresses between models, and no write-only registers (except for the hardware multiplier).

The MSP430 family defines 11 I/O ports, P0 through P10, although no chip implements more than 10 of them. P0 is only implemented on the "3xx family. P7 through P10 are only implemented on the largest members (and highest pin count versions) of the "4xx and "2xx families. The newest "5xx and "6xx families has P1 through P11, and the control registers are reassigned to provide more port pairs.

Port x interrupt vector ("5xx only). This 16-bit register is a priority encoder which can be used to handle pin-change interrupts. If n is the lowest-numbered interrupt bit which is pending in PxIFG and enabled in PxIE, this register reads as 2n+2. If there is no such bit, it reads as 0. The scale factor of 2 allows direct use as an offset into a branch table. Reading this register also clears the reported PxIFG flag.

The MSP430 line offers two types of analog-to-digital conversion (ADC). 10- and 12-bit successive approximation converters, as well as a 16-bit Sigma-Delta converter. Data transfer controllers and a 16-word conversion-and-control buffer allow the MSP430 to convert and store samples without CPU intervention, minimizing power consumption.

The MSP430"s comparator module provides precision slope analog-to-digital conversions. Monitors external analog signals and provides voltage and resistor value measurement. Capable of selectable power modes.

The BOR circuit detects low supply voltages and resets the device by triggering a power-on reset (POR) signal when power is applied or removed. The MSP430 MCU’s zero-power BOR circuit is continuously turned on, including in all low-power modes.

Although the MSP430"s DMA subsystem is very capable it has several flaws, the most significant of which is the lack of an external transfer strobe. Although a DMA transfer can be triggered externally, there is no external indication of completion of a transfer. Consequently DMA to and from external sources is limited to external trigger per byte transfers, rather than full blocks automatically via DMA. This can lead to significant complexity (as in requiring extensive hand tweaking of code) when implementing processor to processor or processor to USB communications.

The EEM provides different levels of debug features such as 2-8 hardware breakpoints, complex breakpoints, break when read/write occurs at specified address, and more. Embedded into all flash-based MSP430 devices.

Some MSP430 models include a memory-mapped hardware multiplier peripheral which performs various 16×16+32→33-bit multiply-accumulate operations. Unusually for the MSP430, this peripheral does include an implicit 2-bit write-only register, which makes it effectively impossible to context switch. This peripheral does not interfere with CPU activities and can be accessed by the DMA. The MPY on all MSP430F5xx and some MSP430F4xx devices feature up to 32-bit x 32-bit.

The FRAM MPU protects against accidental writes to designated read-only memory segments or execution of code from a constant memory. The MPU can set any portioning of memory with bit level addressing, making the complete memory accessible for read, write and execute operations in FRAM devices.

MSP430 devices have up to 12 digital I/O ports implemented. Each port has eight I/O pins. Every I/O pin can be configured as either input or output, and can be individually read or written to. Ports P1 and P2 have interrupt capability. MSP430F2xx, F5xx and some F4xx devices feature built-in, individually configurable pull-up or pull-down resistors.

The universal synchronous/asychrnous receive/transmit (USART) peripheral interface supports asynchronous RS-232 and synchronous SPI communication with one hardware module. The MSP430F15x/16x USART modules also support I²C, programmable baud rate, and independent interrupt capability for receive and transmit.

Available on the MSP430FR4xxx and MSP430FR2xxx series chips, this feature is configured via the SYSCFG register set. This peripheral ties into other peripherals (Timers, eUSCI_A) to generate an IR modulated signal on an output pin.

The LCD/LCD_A controller directly drives LCDs for up to 196 segments. Supports static, 2-mux, 3-mux, and 4-mux LCDs. LCD_A module has integrated charge pump for contrast control. LCD_B enables blinking of individual segments with separate blinking memory.

The LCD_E controller comes with the newer MSP430FR4xxx series microcontrollers and directly drives LCDs up to 448 segments. Supports static, 2-mux, 3-mux, 4-mux, 5-mux, 6-mux, 7-mux, 8-mux (1/3 bias) LCDs. Segment and Common pins may be reprogrammed to available LCD drive pins. This peripheral may be driven in LPM3.5 (RTC running+Main CPU core shutdown low-power mode).

Texas Instruments provides various hardware experimenter boards that support large (approximately two centimeters square) and small (approximately one millimeter square) MSP430 chips. TI also provides software development tools, both directly, and in conjunction with partners (see the full list of compilers, assemblers, and IDEs). One such toolchain is the IAR C/C++ compiler and debugger (assembly language programs of any size can be developed and debugged with this free toolchain).

TI also combines a version of its own compiler and tools with its Eclipse-based Code Composer Studio IDE (CCS). It sells full-featured versions, and offers a free version for download which has a code size limit of 16 KB. CCS supports in-circuit emulators, and includes a simulator and other tools; it can also work with other processors sold by TI.

For those who are more comfortable with the Arduino, there is also another software Energia, an open source electronics prototyping platform with the goal to bring the Wiring and Arduino framework to the Texas Instruments MSP430 based LaunchPad where Arduino code can be exported for programming MSP430 chips. The latest release of Energia supports the MSP-EXP430G2xxx, MSP-EXP430FR5739, MSP-EXP430FR5969, MSP-EXP430FR5994, MSP-EXP430F5529LP, Stellaris EK-LM4F120XL, Tiva-C EK-TM4C123GXL, Tiva-C EK-TM4C1294XL, CC3200 WiFi LaunchPad.

TI consulted with RedHat to provide official support for the MSP430 architecture to the GNU Compiler Collection C/C++ compiler. This msp430-elf-gcc compiler is supported by TI"s Code Composer Studio version 6.0 and higher.

Other commercial development tool sets, which include editor, compiler, linker, assembler, debugger and in some cases code wizards, are available. VisSim, a block diagram language for model based development, generates efficient fixed point C-Code directly from the diagram.closed loop ADC+PWM based PID control on the F2013 compiles to less than 1 KB flash and 100 bytes RAM.

The MSP430F2013 and its siblings are set apart by the fact that (except for the MSP430G2 Value Line) it is the only MSP430 part that is available in a dual in-line package (DIP). Other variants in this family are only available in various surface-mount packages. TI has gone to some trouble to support the eZ430 development platform by making the raw chips easy for hobbyists to use in prototypes.

TI has tackled the low-budget problem by offering a very small experimenter board, the eZ430-F2013, on a USB stick (now obsolete). This made it easy for designers to choose the MSP430 chip for inexpensive development platforms that can be used with a computer. The eZ430-F2013 contains an MSP430F2013 microcontroller on a detachable prototyping board, and accompanying CD with development software. It is helpful

Texas Instruments released the MSP430 LaunchPad in July 2010. The MSP430 LaunchPad has an onboard flash emulator, USB, 2 programmable LEDs, and 1 programmable push button.shield board is available.

All three of these LaunchPads include an eZ-FET JTAG debugger with backchannel UART capable of 1Mbit/s speeds. The FRAM LaunchPads (e.g. MSP-EXP430FR5969, MSP-EXP430FR4133) include EnergyTrace, a feature supported by TI"s Code Composer Studio IDE for monitoring and analyzing power consumption.

In common with other microcontroller vendors, TI has developed a two-wire debugging interface found on some of their MSP430 parts that can replace the larger JTAG interface. The eZ430 Development Tool contains a full USB-connected flash emulation tool (FET) for this new two-wire protocol, named

The advantage of the Spy-Bi-Wire protocol is that it uses only two communication lines, one of which is the dedicated _RESET line. The JTAG interface on the lower pin count MSP430 parts is multiplexed with general purpose I/O lines. This makes it relatively difficult to debug circuits built around the small, low-I/O-budget chips, since the full 4-pin JTAG hardware will conflict with anything else connected to those I/O lines. This problem is alleviated with the Spy-Bi-Wire-capable chips, which are still compatible with the normal JTAG interface for backwards compatibility with the old development tools.

JTAG debugging and flash programming tools based on OpenOCD and widely used in the ARM architecture community are not available for the MSP430. Programming tools specially designed for the MSP430 are marginally less expensive than JTAG interfaces that use OpenOCD. However, should it be discovered mid-project that more MIPS, more memory, and more I/O peripherals are needed, those tools will not transfer to a processor from another vendor.

The MSP430 CPU uses a von Neumann architecture, with a single address space for instructions and data. Memory is byte-addressed, and pairs of bytes are combined little-endian to make 16-bit words.

The MSP430X extension with 20-bit addressing adds added instructions that can require up to 10 clock cycles. Setting or clearing a peripheral bit takes two clocks. A jump, taken or not takes two clocks. With the 2xx series 2 MCLKs is 125 ns at 16 MHz.

The basic MSP430 cannot support more memory (ROM + RAM + peripherals) than its 64K address space. In order to support this, an extended form of the MSP430 uses 20-bit registers and a 20-bit address space, allowing up to 1 MB of memory. This uses the same instruction set as the basic form, but with two extensions:

If the instruction is register-to-register, a different extension word is used. This includes a "ZC" flag which suppresses carry-in (useful for instructions like DADD which always use the carry bit), and a repeat count. A 4-bit field in the extension word encodes either a repeat count (0–15 repetitions in addition to the initial execution), or a register number which contains a 4-bit repeat count.

There is a new extended version of the architecture (named MSP430X) which allows a 20-bit address space. It allows added program ROM beginning at 0x10000.

The size bit is named A/L, where L (long) is used by other processors to indicate 32-bit operands. Also the description of the SXTX instruction (MSP430F5xx Family User"s Guide alau208f page 237) describes the effect of the instruction in register bits 20–31.