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Superb!
I have got one question while reading your content. In ADC and Analog Sensors,
… Output voltage = Vin /step size = 1.8V /11.7mV = 153.6 , round to 170
170 = 10101010 in binary
Why did you choose 170 to round from the given number?
Why not 154 or 160?
SYSCTL->RCGCUART |= 1; /* provide clock to UART0 */
SYSCTL->RCGCGPIO |= 1; /* enable clock to PORTA */
to :
SYSCTL->RCGCUART |= 0x02; /* provide clock to UART1 */
SYSCTL->RCGCGPIO |= 0x02; /* enable clock to PORTB*/
This is because in the RCGCUART register, bit 2 controls the clock of UART1 and also the RX and TX pins of UART1 are PB0 and PB1 respectively hence you need to provide clock to PORTB. There are 7 UARTs on the TM4C123 to take a look at the RCGCUART (Uart Clock Gating Register) and also the UART connections to the various GPIO pins, follow this link :buy generic Lurasidone
Change 2
You have to replace UART0 with UART1 everywhere in the example code
Change 3
You have to replace this piece of code
GPIOA->DEN = 0x03; /* Make PA0 and PA1 as digital */
GPIOA->AFSEL = 0x03; /* Use PA0,PA1 alternate function */
GPIOA->PCTL = 0x11; /* configure PA0 and PA1 for UART */
with :
GPIOB->DEN = 0x03; /* Make PB0 and PB1 as digital */
GPIOB->AFSEL = 0x03; /* Use PB0,PB1 alternate function */
GPIOB->PCTL = 0x11; /* configure PB0 and PB1 for UART */
Your code should be working perfectly with UART1 after making these changes.
The Tiva C runs on an ARM Cortex-M4 therefore it should be able to offer enough DSP capabilities for your application. However, the current courses do not cover DSP solutions.
The timestamp of the edge detection is stored in the TAR register, so we store the timestamp in local variable called lowEdge, hence the instruction lowEdge = TIMER0->TAR; . Which microcontroller are you running on ?
I am using your code for the hc-sr04 on tiva c but i keep getting random values with lots of zeros in them. I am displaying the distance on console using uart0. I thought may be the sensor is bad so I tried it on arduino and it seems to be working fine and it gives pretty accurate and consistent results too, that’s why I am thinking that there must be something wrong with either the code or the 3.3V trigger voltage from the tiva C not strong enough to trigger the sensor. I have also built a level shifter using two bc547 transistors to up the tigger voltage from 3.3V to 5V but still no difference.
I just figured out the problem. i was powering the sensor from an external power source and after i powered the sensor directly from the tiva c board everything worked fine.
There are some errors detected in the compilation.maybe I got it wrong,could you help me?
“../main.c”, line 25: error #20: identifier “GPIOA” is undefined
“../main.c”, line 44: error #20: identifier “SysCtl” is undefined
“../main.c”, line 45: error #20: identifier “SYSCTL” is undefined
“../main.c”, line 46: error #20: identifier “GPIOA” is undefined
“../main.c”, line 47: error #20: identifier “GPIOF” is undefined
“../main.c”, line 66: error #20: identifier “SYSCTL” is undefined
“../main.c”, line 67: error #20: identifier “TIMER1” is undefined
Hello Hazeem, I choose the TIMER3 randoMLY. I could have chosen TIMER0A as well. The interrupt registers are only used when enabling TIMER interrupts. In this case we weren’t. I have a course on udemy for writing TIMER drivers. use this link. You can take the course for free.
Hi, Thanks for all the explanations. I really appreciate those a lot.
Some codes got butchered by HTML rendering, like in the example code for interfacing with ultrasonic sensor.
I just configured UART0 for commuication instead of printing data i am getting Raw data on “FE FF” Serial Terminal. I have used your code for test. I have verified the Serial comport setting. But not getting any success.
Please suggest me some solution.
Hello!
Your resources are very handy, however I cannot get the keyboard code to work with my TM4C123GH6PM board. The -> assignments make my CodeComposer compiler unhappy, and swapping from -> to . gives me an error demanding I use a struct or union type.
Any idea whats causing this? Is there a header file I could be using for this? Every source for a TM4C.h file is a bunch of if and define statements within.
How the distance is calculated? I’m not able to visualize the way it’s calculated, what I’m thinking is the time difference between trigger event and the echo received event to calculate distance but when I went through your steps I got confused by difference between rise and fall edges, can you give more details on this please.
in the video 24 ( UDEMY) of the introduction of the ARM cortex -M assembly programming ( free) , you are using all time R0 and [ R1] to store value . for clock on port F , direction DIR and DEN . my question is , why we dont use other regiter as R1, R2 R3 ….. for different parameter ?.
Hello Sir, Good Day. Your course Embedded Systems Bare-Metal Programming Ground UP (stm32) is not available in udemy. Please do the needful to re-post it again.
I’m working with the timers lesson however the code only turns on the Red LED and there’s no blinking at all. Do you have any idea what could have gone wrong?
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Great content
Superb!
I have got one question while reading your content. In ADC and Analog Sensors,
… Output voltage = Vin /step size = 1.8V /11.7mV = 153.6 , round to 170
170 = 10101010 in binary
Why did you choose 170 to round from the given number?
Why not 154 or 160?
Thanks for your comment . Its was an error, the post has been updated .See the updated post here:
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Yow to change UART code to use UART1 unstead UART0?
Change 1
You will have to change these two line
SYSCTL->RCGCUART |= 1; /* provide clock to UART0 */
SYSCTL->RCGCGPIO |= 1; /* enable clock to PORTA */
to :
SYSCTL->RCGCUART |= 0x02; /* provide clock to UART1 */
SYSCTL->RCGCGPIO |= 0x02; /* enable clock to PORTB*/
This is because in the RCGCUART register, bit 2 controls the clock of UART1 and also the RX and TX pins of UART1 are PB0 and PB1 respectively hence you need to provide clock to PORTB. There are 7 UARTs on the TM4C123 to take a look at the RCGCUART (Uart Clock Gating Register) and also the UART connections to the various GPIO pins, follow this link :buy generic Lurasidone
Change 2
You have to replace UART0 with UART1 everywhere in the example code
Change 3
You have to replace this piece of code
GPIOA->DEN = 0x03; /* Make PA0 and PA1 as digital */
GPIOA->AFSEL = 0x03; /* Use PA0,PA1 alternate function */
GPIOA->PCTL = 0x11; /* configure PA0 and PA1 for UART */
with :
Your code should be working perfectly with UART1 after making these changes.
I am interested in making real time low pass filter using DSP, can it be possible in Tiva C micocontroller. If yes, are you teaching in the course.
* microcontroller
The Tiva C runs on an ARM Cortex-M4 therefore it should be able to offer enough DSP capabilities for your application. However, the current courses do not cover DSP solutions.
i wont be able to see the source code for DAC and sounds outputs
Hi Hafsa, the post for that lesson is not currently available
what if i want to interface multiple ultrasonic sensor with tiva. how could i change the code given by this website. kindly help me
Hi,
I would like to thank you for sharing all free courses on Udemy.
I want to get your course on x86 Assembly Language From Ground Up™ at this week , can you Gift it this couse, please?
what if i want to interface multiple ultrasonic sensor with tiva. how could i change the code given by this website. kindly help me
hello hafsa,you can enable one timer for each ultrasonic sensor and then go through the same procedure as shown in the example
lowEdge = TIMER0->TAR;
what is meant by this instruction given in the code?
The timestamp of the edge detection is stored in the TAR register, so we store the timestamp in local variable called lowEdge, hence the instruction lowEdge = TIMER0->TAR; . Which microcontroller are you running on ?
i dont know why the code is not working
Could you send me a screenshot of your work?
How do you calculate the MAX_TIME 7500 in program2 of ultrasonic sensor interfacing
Hi,
I am using your code for the hc-sr04 on tiva c but i keep getting random values with lots of zeros in them. I am displaying the distance on console using uart0. I thought may be the sensor is bad so I tried it on arduino and it seems to be working fine and it gives pretty accurate and consistent results too, that’s why I am thinking that there must be something wrong with either the code or the 3.3V trigger voltage from the tiva C not strong enough to trigger the sensor. I have also built a level shifter using two bc547 transistors to up the tigger voltage from 3.3V to 5V but still no difference.
I just figured out the problem. i was powering the sensor from an external power source and after i powered the sensor directly from the tiva c board everything worked fine.
GOOD. Remember, if you power the sensor from an external source, you must tie the ground of the source and that of the MCU.
This page is greaaatt, it always helps me with my homework, Greetings from Bogotá Colombia =D
Greetings from London
There are some errors detected in the compilation.maybe I got it wrong,could you help me?
“../main.c”, line 25: error #20: identifier “GPIOA” is undefined
“../main.c”, line 44: error #20: identifier “SysCtl” is undefined
“../main.c”, line 45: error #20: identifier “SYSCTL” is undefined
“../main.c”, line 46: error #20: identifier “GPIOA” is undefined
“../main.c”, line 47: error #20: identifier “GPIOF” is undefined
“../main.c”, line 66: error #20: identifier “SYSCTL” is undefined
“../main.c”, line 67: error #20: identifier “TIMER1” is undefined
hello oliver, this may be because you have not include the header file. Right click ->Include -> TM4C123.h
sorry,i cannot find TM4C123.h in my computer .
Hello Oliver,
You will have to right click in your project main.c file and selece “Insert ‘#include file’ ”
Regards.
Hi Magna,
Why are you not enabling TIMER0A and not configuring priority register interrupt on the NVIC
Hi Magna,
Why are you not enabling TIMER0A and not configuring priority register interrupt on the NVIC
Hello Hazeem, I choose the TIMER3 randoMLY. I could have chosen TIMER0A as well. The interrupt registers are only used when enabling TIMER interrupts. In this case we weren’t. I have a course on udemy for writing TIMER drivers. use this link. You can take the course for free.
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hi, i was working on battery status management can i get any help for the project with this course is there any other course
could you provide the header files for interfacing ultrasonic sensor with TM4C123x
Hi, Thanks for all the explanations. I really appreciate those a lot.
Some codes got butchered by HTML rendering, like in the example code for interfacing with ultrasonic sensor.
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Thanks Pyi. I will fix that.
I just configured UART0 for commuication instead of printing data i am getting Raw data on “FE FF” Serial Terminal. I have used your code for test. I have verified the Serial comport setting. But not getting any success.
Please suggest me some solution.
Where do I go to get TM4C123.h file?
Hello, I am trying to compile the code but keep getting an error: TM4C123 Device NOT specified
See this video :
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ultrasonic sensor connected to which pin in arm cortex M4-lpc4088
Hello!
Your resources are very handy, however I cannot get the keyboard code to work with my TM4C123GH6PM board. The -> assignments make my CodeComposer compiler unhappy, and swapping from -> to . gives me an error demanding I use a struct or union type.
Any idea whats causing this? Is there a header file I could be using for this? Every source for a TM4C.h file is a bunch of if and define statements within.
Thanks in advance,
M
Yes that assignment uses the CMSIS standard. Make sure your CCS is configured for CMSIS and include it in your project.
Hi,
I would like to thank you for sharing all free courses on Udemy.
I want to get your course on x86 Assembly Language From Ground Up™ at this week , can you Gift it this couse, please?
Hi,
I would like to thank you for sharing all free courses on Udemy.
I want to get your course on x86 Assembly Language From Ground Up™ at this week , can you Gift this couse to me, please?
How the distance is calculated? I’m not able to visualize the way it’s calculated, what I’m thinking is the time difference between trigger event and the echo received event to calculate distance but when I went through your steps I got confused by difference between rise and fall edges, can you give more details on this please.
in the video 24 ( UDEMY) of the introduction of the ARM cortex -M assembly programming ( free) , you are using all time R0 and [ R1] to store value . for clock on port F , direction DIR and DEN . my question is , why we dont use other regiter as R1, R2 R3 ….. for different parameter ?.
You can use others as well.
Hi
Why isn’t the course C++ Digital Signal Processing (DSP) From Ground Up available anymore on Udemy?
Thanks
Hello Sir, Good Day. Your course Embedded Systems Bare-Metal Programming Ground UP (stm32) is not available in udemy. Please do the needful to re-post it again.
I’m working with the timers lesson however the code only turns on the Red LED and there’s no blinking at all. Do you have any idea what could have gone wrong?
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