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AN3288 bảng dữ liệu(PDF) 17 Page - STMicroelectronics

tên linh kiện AN3288
Giải thích chi tiết về linh kiện  The purpose of this application note is to provide an accurate description
PDF  27 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3288 bảng dữ liệu(HTML) 17 Page - STMicroelectronics

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AN3288
Special features
Doc ID 18011 Rev 2
17/27
Regarding the two new states, while “ACTUATE_FORWARD” is implemented as the state
previously reported in the previous thresholds system C algorithm, the state
“ACTUATE_REVERSE” has been implemented in the same way but with positive threshold
values.
The thresholds system code modified for enabling the bidirectional functionality is
represented here:
/* "FORWARD" direction */
state ACTUATE_FORWARD:
if(acc<thr3a)
/* it corresponds to the maximum braking effort */
{
...
TIM1_SetCompare1(PWM3); /* set the PWM duty cycle to 25% */
brk_stat = TRUE;
...
}
else if(acc<thr2a) /* it corresponds to a medium braking effort */
{...
TIM1_SetCompare1(PWM2); /* set the PWM duty cycle to 50% */
brk_stat = TRUE;
...
}
...
else /* if no braking */
{TIM1_SetCompare1(PWM0); /* PWM duty cycle to 100% set LEDs OFF */
brk_stat = FALSE;
}
state= WAIT;
break;
/*****************************************************************/
/* "REVERSE" direction */
state ACTUATE_REVERSE:
if(acc>thr3b)
/* it corresponds to the maximum braking effort */
{
...
TIM1_SetCompare1(PWM3); /* set the PWM duty cycle to 25% */



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