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Questions - keil

Expected expression error in keil uvision (Tiva C Arm/ TM4C123GH6PM)

void PortF_Init(void){ SYSCTL_RCGC2_R |=(1<<5); while((SYSCTL_PRGPIO_R&0x00000020)==0){} GPIO_PORTF_LOCK_R =0x4C4F434B ; // Lock register . GPIO_PORTF_CR_R =0XFF ; ...
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xyz

embedded

keil

pwm

Votes: 0

Answers: 0

How to enable the counter of Timers in ARM CORTEX M3(STM32F103RB)?

I am trying to write code for toggling a pin(Pin 15) of a port (PORTC) using timers(specifically TIM2). I have to use the prescale registers to divide the clock frequency such that I obtain the requir...
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Laxman Chinannavar

arm

stm32

cortex-m

keil

Votes: 0

Answers: 1

Latest Answer

First of all, you should not set the TIM2_ARR register to zero. This register determines the maximum value of the counter before generating update or interrupt event by the timer. So if you set it to ...
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mehdi

How to make switching frequency for two lines of ports different?

It is necessary that the switching frequency of one output be twice as large as the second, and not the same. I don't understand how I can set it up. Here is my code and received signals. #include...
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1i10

c

stm32

microcontroller

gpio

keil

Votes: 0

Answers: 1

Latest Answer

You need a counter in your endless loop which is increased on every execution of the loop. You than need to toggle the first output every time the loop is executed. Than the second output needs to be ...
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drewle

MULS instruction gives error A1858E in Keil

MOV R0, #20 MOV R1, #1 MULS R0, R0,R1 error: A1858E: Flag setting form of this instruction not available When I use the mul command, there is no problem, but when I type MULS, it gives th...
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JunEmbed

assembly

arm

stm32

keil

stm32f4discovery

Votes: 0

Answers: 1

Latest Answer

I solved the problem by swapping the registers. MULS R0, R1,R0; MULS Rd, Rn, Rd
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JunEmbed

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