MSP430 Ultra-Low Power Microcontrollers

what is the highest bandwidth sensor signal that can be input into DSP430?

charly — Tue, 17 Nov 2009 21:10:50 GMT

Hi I have been a question about DSP430 with sensor applications.

What is the highest bandwidth sensor signal that can be input into DSP430?

I know DSP430 is a 8MHz microcontroller. Is this related with the sampling rate?

Also how does this change with the # of sensor signals?

What will change if increasing the # of sensors?

Can anyone give me some instruction or hint about these questions?

Thanks a lot!

Regarding interfacing MSP430F2002 with CC1150

sengottuvelmurugan — Sat, 21 Nov 2009 18:54:09 GMT

Hi,

I am trying to control CC1150 using MSP430F2002. My goal is transmit a unique ID every 'x' seconds or so. I have converted the development code given along with ez430-RF2500. But I am not sure what clock value to give as input to CC1150. Do any of you have any suggestions?

Converting float numbers to string

Alejos — Sat, 21 Nov 2009 10:09:48 GMT

Hi all,

I need help. I need to send a float number via UART but i need a way to convert this number into a string to send character by character. I am using the MSP430F1611 and IAR. I tried to program some codes but I had no success.

I tried the first time to separate directly the integer part and the fractional part but had problems with numbers like 54.0034 because the output of the fractional part was allways 34 and not 0034.

Also I tried to use the function sprintf() but didn't work. I found in the documentation that this function does not support float numbers for the MSP430.

I need to solve this problem so i made the code below....I think it is easy to understand. I want to separate the float number in different digits like this: 345.678 ==> "3" "4" "5" "." "6" "7" "8" and send the diferent numbers via UART. I programed this code with DevC software and it worked perfectly, quite the opposite with IAR. It doesn't work with IAR. I know that this code has some restrictions like that i can use only three integers and three decimals but i don't get any other idea about how to do this. It should be a simple problem but i think that it is defeating me...

Anybody can help me?, maybe telling me what is wrong with my code, or with other ideas, or with any other code to send a float via UART with a MSP430...

static void SendValue(float data)
{

    static int number;
    static char digits[7]={0,0,0,0,0,0,0};
    static int i=0;


    number = abs(data*1000);

    digits[6]= (number % 10) + 48; //add 48 for the corresponding ASCII number
      number = number/10;
    digits[5]= numero % 10 + 48;
     number = number/10;
    digits[4]= nnumber % 10 + 48;
      number = number/10;
      digits[3]= 46; //"."
    digits[2]= number % 10 + 48;
     number = number/10;
    digits[1]= number % 10 + 48;
      number = number/10;
    digits[0]= number % 10 + 48;
      //number = number/10;

    if (data <0)
    { TXBUF0 = 45; //"-"
        while (!(IFG1 & UTXIFG0));
    }

for(i=0; i<7 ; i++)
{
     TXBUF0 = (digits[i]);
      while (!(IFG1 & UTXIFG0));
}

}

I hope you can help me.Thank you very much for your help in advance.

Greetings

Alejos

SD16_A bug and Bootstrap loader problem in msp430F47186

Maxim Yachnyy — Fri, 20 Nov 2009 08:00:27 GMT

Hello!

I'm trying a new msp430F47186. And there are some problems i've found in this device:

1. I can't assign, for example, SD16_A channel 0 to inputs A1-A5, only to A0! Exactly the same behavior in other channels - I can assign each channel only one corresponding input. If I assign channel Inappropriate his entrance, then the conversion result is a noise around zero. But in UserGuide is said, that i can assign any internal channel to any AX input...

2. Bootstrap loader doesn't work at all. If i try to get BSL version using BSL_Scripter.exe program it returns "ERROR (2xx assumed)". Using debugger I've read the memory at location 0xC00 (start of BSL):

000C00 0C06 mova @R12,R6

000C02 0C1E mova @R12+,R14

000C04 3FFF jmp 0xC04 - what is this? In previous versions of BSL (under 2.13) there were no jump to itself!

I thought thait it is a bug in revision of my MCU, but i haven't found this bug in Erratasheet.

I would appreciate your answers, if any.

MSP430 interrupts

madelgi — Fri, 20 Nov 2009 19:36:57 GMT

Good morning:

Can I use a pin that has been configured as an interrupt and as a general purpose I/O ?

My application uses a pushbutton that triggers an interrupt on the rising edge. Then the software takes a decision based on the time the button has been pushed (1, 5 or 10 seconds). So I need to be able detect the irq request but also to continue reading the logic status of the pin, without losing the irq capabilities.

Thanks.

Code Composer Essentials v4 SR1 on native Linux?

Robert Åkerblom-Andersson — Sun, 16 Aug 2009 10:07:26 GMT

Hi, as an Linux user I would like to ask if it is possible to run Code Composer Essentials v3.1 SR1 native on Linux? Since it is Eclipse based I don't see any reason why it should not work? Or is it the compiler that don't work on Linux? I'm an experiences Linux user and I know that you might run it through wine but it is often slow imho.

So, is this possible or not? For microchip I have used Hi-TIDE that is also eclipse based from Hi-Tech (no owned by microchip) and that worked nice :)

Software delay problem???

Michael Conover — Fri, 20 Nov 2009 17:09:05 GMT

I am having a problem creating a software delay to toggle a pin. The problem is the time of the software delay. I am using a MSP430F5438. MCLK should be ~1MHz. I count for 200 clock cycles which should be ~0.2ms. When I probe the pin the time delay is ~2ms. This would mean that MCLK would be 100kHz which doesn't make sense. The code is below. Does anyone know why this time delay would be off?

#define DELAYLOOPS 200

volatile unsigned int count;

P1OUT |= BIT0; // turn P1.0 high

for (count = 0; count < DELAYLOOPS; ++count) {

}

P1OUT &= ~BIT0; // turn P1.0 low

Problem in Transmitting Data in SPI COmmunication.

Rishi Singhal — Wed, 18 Nov 2009 07:32:39 GMT

hi,

i have a Problem while sending the data in SPI - SO PIn.

please see this code, i geeting always a 'U' charater in CRO.

#include <msp430x14x.h>
#include <string.h>

#define SCK_HIGH      P5OUT |=0x08       //clock   out
#define SCK_LOW       P5OUT &=~0x08
#define SIN_HIGH      P5OUT |=0x04       //data out
#define SIN_LOW       P5OUT &=~0x04
#define sout          (P5IN & 0x02)/(0x02)   // data in
#define CS_HIGH       P4OUT |=0x08        // chip select high
#define CS_LOW        P4OUT &=~0x08        // chip select low

void cs_delay(void);
void serial_send(unsigned char Char_Out);
void UART0_Init(void);
void spi_init();

void testspi(void);

void main()
{
WDTCTL = WDTPW + WDTHOLD;

spi_init();
while(1)
{
TXBUF1 = 'W';
}
}

void spi_init()
{
P5SEL |= 0x0E;                            // P5.1,2,3 SPI option select
P5OUT &= ~0x01;
P5DIR |= 0x01;                            //Reset Slave

P5DIR &= ~0x01;
// P5DIR |= 0x0C;                            //Reset Slave

P4DIR |=0x08;
P4OUT |=0x00;

UCTL1 = CHAR + SYNC + MM + SWRST;         // 8-bit, SPI, Master
UTCTL1 = CKPL + SSEL1 + STC;              // Polarity, SMCLK, 3-wire

UBR01 = 0x02;                             // SPICLK = SMCLK/2

UBR11 = 0x00;
UMCTL1 = 0x00;
ME2 |= USPIE1;                            // Module enable
UCTL1 &= ~SWRST;                          // SPI enable
IE2 |= URXIE1 + UTXIE1;                   // RX and TX interrupt enable

}

void UART0_Init(void)
{

volatile unsigned int i;
P3SEL |= 0x30;                            // P3.4,5 = USART0 TXD/RXD

BCSCTL1 &= ~XT2OFF;                       // XT2on

BCSCTL2 |= SELM_2 + SELS;                 // MCLK = SMCLK = XT2 (safe)
ME1 |= UTXE0 + URXE0;                     // Enable USART0 TXD/RXD
UCTL0 |= CHAR;                            // 8-bit character
UTCTL0 |= SSEL1;                          // UCLK = SMCLK
UBR00 = 0x41;   //9600                    // 8MHz 115200
UBR10 = 0x03;   //9600                    // 8MHz 115200
UMCTL0 = 0x09;                            // 8MHz 115200 modulation
UCTL0 &= ~SWRST;                          // Initialize USART state machine
}

here i am sending 'W' data continiously, but i get 'U' response in CRO continusly.

Regards

rishi

can any body give me any link of 4 PIN SPI routines

Rishi Singhal — Fri, 20 Nov 2009 05:57:30 GMT

can any body give me any link of 4 PIN SPI routines

IAR Embedded Workbench Kickstart for MSP430 v4.21

John Moran — Thu, 19 Nov 2009 15:58:02 GMT

Sorry for the probably dumb question but, I have just downloaded the latest version of this from the TI website and, of course, ran the blinking LED demo to check that all was working. The target is an eZ430-F2013.

If I use the appropriate C demo, it all works fine and I can change the blink rate.

However, when I use the asm version of the same demo it rebuilds all, downloads and runs ... then the Workbench locks up as soon as I click on anything on the screen.

I downloaded everything into the default locations and never changed anything.

Final dumb question - when in C mode I can select the target processor for downloading to, but not in asm - what's that about?

Kind regards - John Moran

64-bit USB Driver For MSP-EXP430F5438 Experimenter Board

johnw — Wed, 30 Sep 2009 09:00:19 GMT

Hello All,

Anyone know where to get the 64-bit USB driver for the MSP-EXP430F5438 Experimenter Board?

When I install the REV-03 USB Driver that is in the ZIP file from the site - http://www.ti.com/litv/zip/slac227d - it says something to the effect that the driver isn't intended for this platform - even though the PDF - http://www.ti.com/litv/pdf/slau263b - says otherwise.

Thanks,
johnw

ez430-RF2500 UART

kpbr — Wed, 28 Oct 2009 04:57:10 GMT

Are any drivers required to simply stream information from the MSP430 on the ez430-RF2500 to a computer with USB?

I may have a scenario where I'd do my development on my Windows XP computer. But the ez430-RF2500 would plug into another computer for the application. So I wonder - if I flash the device with my software (from IAR on my Windows XP computer), could I for example, plug it into a linux computer (or windows mobile OS), and the ez430-RF2500 would start streaming data once getting power?

Thanks.

MSP430F2274 question about setting clock for SD Card and USB

ForzaJuve — Fri, 13 Nov 2009 04:07:30 GMT

Hi,

I am using MSP430F2274 interfaces with a SD card, I want to write something on the card and read back through USB display the data on Hyper Terminal.

I found SD card and USB share the same clock, which is SMCLK, but using different frequency and baud rate, there's seems a conflict between these two, therefore Hyper Terminal cannot recieve anything from MSP.

Is it possible to make these two work well by using the same clock, same baud rate?

Thank you.

regards.

Possible to transmit data to Hyperterminal with >9600kBaud ?

Erich Hermann — Tue, 17 Nov 2009 16:44:14 GMT

Hy,

I transmit data from the MSP430F2274 via TUSB3410 (eZ430-RF2500 StarterKit, AccessPoint) to the HyperTerminal on my PC. With 9600kBaud it works fine. When I increase the Baudrate (e.g. 56000), it doesn't work.

USCI clock source is SMCLK. I changed UCA0BR0 to x8E and UCA0BR1 to x00. Register UCA0MCTL is x0E (oversampling mode is disabled), the Hyperterminal baudrate is set to 56000. What else did I forgotten? I try it also in oversampling mode but without success.

Is it not possible to transmit data with a higher baudrate than 9600?

best regards

How to make a programme for the ED to send data to The AP?

Shahrokh Pagah — Thu, 19 Nov 2009 22:05:50 GMT

Hello Engineers...

I want to set the ED and the AP programmes to send and receive data from ED to AP.

The ED to send a packet e.g. 88 66 99. and the AP receive the packet and send it to the PC.

Via com port. and then how can i be able to see them can it be displayed in sensor demo monitor consoole?

i have the msp430 eZ430-RF2500

Any help please

Best Regards

Shahrokh

BootStrap Loader Mode on MS430F169

AllanJ — Thu, 19 Nov 2009 20:32:36 GMT

Hello,

I'm trying to use BootStrap Loader to erase/program a MSP430F169 (because JTAG port is locked).

It boots up properly, (sending 0x80, returns 0x90 ) but all other commands (RX pass or TX BSL version) returns 0xA0 always!

Thanks,

MSP430F248 Debug PROBLEM

jedi_erdi — Thu, 19 Nov 2009 14:27:39 GMT

Hi,

While the msp430 was working on the debugger screen(CCE V3.1) an error message like below appeared:

""The CIO command cmd:(18) in the CIO buffer at address (0x18e8) was not recognized. Please check the device and program memory maps.""

and the device began not working properly.

What may cause that error?

cc430 LCD watch Dev. Tool

Grzegorz Latocha — Mon, 05 Oct 2009 20:35:45 GMT

Hello,

I have seen on a TradeShow in Nueremburg (Germany) on March the new tool for 430F6xxx with Radio and LCD.

This tool was actually a hand watch. Does somebody know what is going on with it?

I am really waiting for it.

Best regards

I2C without interrupts

VDM — Wed, 29 Apr 2009 19:30:01 GMT

Hi all,

I am currently trying to dial with the LIS331DLH from ST, through I2C.
I'm using an MSP430F2649.

LIS331DLH datasheet is here : http://us.st.com/stonline/products/literature/ds/15094/lis331dlh.pdf

My problem is that the values read from any register always equals to zero.
Can someone please have a look at my code and tell me if something's wrong ?

MSP430F2649 running @ DCO set to 12 MHz.

void I2C_Start(unsigned char Addr, unsigned char ReadWrite)
{
while (UCB0CTL1 & UCTXSTP);               // Ensure stop bit was sent
UCB0CTL1 |= UCSWRST;                      // Enable SW reset
IFG2 &= ~UCB0TXIFG;
UCB0CTL0 = UCMST + UCMODE_3 + UCSYNC;     // I2C Master, synchronous mode
UCB0CTL1 = UCSSEL_2 + UCSWRST;            // Use SMCLK, keep SW reset
UCB0BR0 = 120;                             // fSCL = SMCLK/12 = ~400kHz
UCB0BR1 = 0;
UCB0I2CSA = Addr;                         // Slave Address is 048h
UCB0CTL1 &= ~UCSWRST;                     // Clear SW reset, resume operation
UCB0CTL1 |= ReadWrite + UCTXSTT;             // I2C TX, start condition
}

void I2C_Send(unsigned char value)
{
while(!(IFG2 & UCB0TXIFG))
UCB0TXBUF = value;
}

unsigned char I2C_Read()
{
unsigned char retval;
while(!(IFG2 & UCB0RXIFG)) {
    retval = 0;
}
retval = UCB0RXBUF;
IFG2 &= ~UCB0RXIFG;
return retval;
}

void I2C_Stop()
{
UCB0CTL1 |= UCTXSTP;                    // I2C stop condition
IFG2 &= ~UCB0TXIFG;                     // Clear USCI_B0 TX int flag
}

void I2C_Restart(unsigned char Addr, unsigned char ReadWrite)
{
UCB0CTL1 |= ReadWrite + UCTXSTT;             // I2C TX, start condition
IFG2 &= ~UCB0TXIFG;
}

void LIS331_Config()
{
I2C_Start(LIS331_ADDR, I2C_WRITE);
I2C_Send(LIS331_CTRL_REG1);
I2C_Send(LIS331_CTRL_REG1_VAL);
I2C_Stop();
}

uint16_t LIS331_Read_Z()
{
unsigned char tempval[2];
uint16_t *value;
value = (unsigned int *)tempval;
I2C_Start(LIS331_ADDR, I2C_WRITE);
I2C_Send(LIS331_OUT_Z_L);
I2C_Stop();
I2C_Start(LIS331_ADDR, I2C_READ);
tempval[1] = I2C_Read();
I2C_Stop();
tempval[0] = I2C_Read();
return *value;
}

in main :

LIS331_Config();
__delay_cycles(1000);
Z_accel = LIS331_Read_Z();

Thanks a lot.

SDA and SCL always low

AgustF — Wed, 18 Nov 2009 14:15:18 GMT

I am implemting a I2C bus on a MSP430F5419 to a slave PCF8566

The problem is that after init of the I2C bus when I release the UCSWRST my SDA and SCL are always low and therefore the UCBUSY flag is always set.

Here is init code:

void Init_I2C(unsigned char slave_address,unsigned char prescale)
{

UCB0CTL1 = UCSWRST;                        // Enable SW reset
P3SEL |= BIT1 + BIT2;                 // Assign I2C pins to USCI_B0
UCB0CTL0 = UCMST + UCMODE_3 + UCSYNC;       // I2C Master, synchronous mode
UCB0CTL1 = UCSSEL_2 + UCSWRST;              // Use SMCLK, keep SW reset
UCB0BR0 = prescale;                         // set prescaler set to 8 , 1.03MHz/8 = 133 KHz
UCB0BR1 = 0;
UCB0I2CSA = slave_address;                  // Set slave address
UCB0CTL1 &= ~UCSWRST;                       // Clear SW reset, resume operation
UCB0IE |= UCTR + UCTXIE;                            // Enable TX ready interrupt
}

I have 100k Pull-up resistors on the lines and have a whole port (P4) driving the voltage to the PCF8566 with a 100 ohm resistor on it.

I cant seem to find what is making the bus stay stuck at low. I can set the lines high with setting them to output and writing high to the port.

System has Vcc = 3 V

Any ideas??

A0, A1 input does not work (MSP430F479)

OKY — Wed, 11 Nov 2009 09:18:02 GMT

I am testing ADC of MSP430F479. I could success in using A3, and A4 analog input

reading from the DAC output.

However, the similar program does not work for A0 and A1 analog input. A0 and A1

are assigned to P6.0, 6.1 and P6.3 and 6.4. The value obtained from them are

very small value instead of 0.6V.

I connected A0- and A1- to the GND same as the A4- to the GND.

Following is the program used to check the analog A1 input.. Does someone

find some mistake in this?

-----------------------------------------------------

#include "msp430xG47x.h"

#define Num_of_Results 8

unsigned int results[Num_of_Results];

float g_ad;

void main(void)
{
volatile unsigned int i; // Use volatile to prevent removal
// by compiler optimization

WDTCTL = WDTPW + WDTHOLD; // Stop WDT
SD16CTL = SD16REFON;

for (i = 0; i < 10000; i++); // Delay for 32 kHz crystal

DAC12_0CTL = DAC12IR + DAC12SREF_3 + DAC12AMP_5 + // SD16 Ref,
DAC12OPS + DAC12ENC + DAC12CALON;

FLL_CTL0 |= XCAP14PF;                     // Configure load caps

P1SEL |= 0x40; // DAC P1.6
P1SEL |= 0x04 + 0x08; // AD4 P1.2, 1.3
P6SEL |= 0x01 + 0x02; // AD1 P6.0, 6.1
P6SEL |= 0x08 + 0x10; // AD0 P6.3, 6.4

for (i = 0; i < 10000; i++);              // Delay for 32 kHz crystal to
                                            // stabilize

SD16CTL = SD16REFON + SD16SSEL0; // 1.2V ref, SMCLK

SD16CCTL0 |= SD16IE + SD16UNI ;

SD16INCTL0 |= SD16INTDLY_0 + SD16INCH_1; // INCH_0,1,4

_EINT();

for (i = 0; i < 0x3600; i++); // Delay for 1.2V ref startup

SD16CCTL0 |= SD16SC;                      // Set bit to start conversion

DAC12_0DAT = 0x800; // 2048h

for(;;) {
    __bis_SR_register(LPM0_bits+GIE);
}

}

#pragma vector=SD16A_VECTOR
__interrupt void SD16ISR(void)
{
static unsigned int index = 0;

switch (SD16IV)
{
case 2: // SD16MEM Overflow
break;

case 4:                                   // SD16MEM0 IFG
    results[index] = SD16MEM0;
    g_ad = results[index] * 0.6 / 0xFFFF; // unipolar

    if (++index == Num_of_Results)
    {
      index = 0;
    }
    break;
}

__bic_SR_register_on_exit(LPM0_bits); // Enter LPM0

}

Assembler command reference of MSP430X and MSP430

OKY — Wed, 18 Nov 2009 08:52:40 GMT

I would like to read references of assembler commands of MSP430X and MSP430.

Where can I find the reference document?

My current question is what is the difference between "bra" and "br", "calla" and "call".

MSP430F21X2 Shared interrupt Vectors, differnt ISR

vipul Panchal — Wed, 18 Nov 2009 10:08:40 GMT

Hello,

I am using MSP430F2132, Where i am using USCI_A0 Block as SPI master & USCI_B0 Block as I2c Slave.

I want to use interrupts of both USCI Blocks, How can i write different ISR'S for Both the USCI Blocks as they have sharesd interrupt Vectors.

MSP430F2122 JTAG connection problems

Teddy — Thu, 23 Jul 2009 21:49:31 GMT

Hello,

I've got a new design using the MSP430F2122 but can't seem to get the JTAG connection operational. I've use three different JTAG connectors (TI parallel FET, Olimex parallel and USB) and tried three different IDE/compiler manufacturer's software. I am using pin 8 of the JTAG for the TEST/SBWTCK control as part of the JTAG connection, but none of the software is able to recognize and/or connect to the device. I've tried an MSP430F2131 device which should be rather similar, and had no problems getting the JTAG connection running. I've tried three different hardware implementations of the 2122 and have even placed it a separate board with only the JTAG and power connections but still it will not respond. The 2122 parts I just ordered from Mouser are REV A parts, though the TI datasheet says that REV B parts are being produced. Hope that will cover all the details.

Can anyone suggest what may be going on here?

Thanks,

Teddy

Problem in Transmitting Data in SPI COmmunication.

Rishi Singhal — Wed, 18 Nov 2009 07:31:49 GMT

hi,

i have a Problem while sending the data in SPI - SO PIn.

please see this code, i geeting always a 'U' charater in CRO.

here i am sending 'W' data continiously, but i get 'U' response in CRO continusly.

Regards

rishi