Difference: BoardSupportPackageWBfeather (20 vs. 21)
Revision 212021-07-26 - PeterSchmid
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%DASHBOARD{ section="banner" | ||||||||||
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| title="Board Support Package for the STM32WB Feather Development Board" titlestyle="color:#F00000;" }% | ||||||||||
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| < < | Intro
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| > > | Intro
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The board support package for the STM32WB Feather Development Board (see https://www.reclaimerlabs.com/stm32wb-feather ) is restricted to the JP1 and JP3 pin header, the onboard LEDs and switches (buttons), and the onboard 16 MiB serial NOR flash. The STM32WB55 has much more capabilities than 11 digital I/O pins, 6 analog input pins, UART, SPI, and I2C interfaces. But if you want to use the more advanced features you can use the CubeMX to create source code for the internal peripherals. This project wants to show how to use the Cube Ecosystem for a Forth system (or vice versa) and can't implement all features and possibilities the STM32WB has. It is a good starting point for your project.
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| < < | Contents
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| > > | Contents
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| Line: 73 to 73 | ||||||||||
| dport! ( n -- ) sets the digital output port (D0=bit0 .. D15=bit15). dport@ ( -- n ) gets the digital input/output port (D0=bit0 .. D15=bit15). | ||||||||||
| Changed: | ||||||||||
| < < | dpin! ( n a -- ) sets the digital output port pin a (D0=0 .. D15=15, A0=16 .. A6=23) | |||||||||
| > > | dpin! ( n a -- ) sets the digital output port pin a (D0=0 .. D15=15, A0=16 .. A6=22) | |||||||||
| dpin@ ( a -- n ) gets the digital input/output port pin a dmod ( u a -- ) sets the pin mode: 0 in, 1 in pull-up, 2 in pull-down, 3 out push pull, 4 out open drain, 5 out push pull PWM, 6 input capture, 7 output compare, 8 I2C, 9 USART, 10 analog | ||||||||||
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| < < | Six port pins are supported so far. The 16 bit timers TIM3 (D5 and D6) and TIM4 (D9, D10, D14, and D15) are used for the timebase, time resolution is 1 us (42 MHz SysClk divided by 42). The PWM scale is from 0 (0 % duty cycle) to 1000 (100 % duty cycle), this results in a PWM frequency of 1 kHz. If you need higher PWM frequencies, decrease the divider and/or the scale. | |||||||||
| > > | Three port pins are supported so far. The 16 bit timer TIM1 (D0, D1, A4) is used for the timebase, time resolution is 1 us (32 MHz SysClk divided by 32). The PWM scale is from 0 (0 % duty cycle) to 1000 (100 % duty cycle), this results in a PWM frequency of 1 kHz. If you need higher PWM frequencies, decrease the divider and/or the scale. | |||||||||
| Changed: | ||||||||||
| < < | PWM port pins: D5 (TIM3CH2), D6 (TIM3CH1), D9 (TIM4CH3), D10 (TIM4CH4), D14 (TIM4CH2), and D15 (TIM4CH1). | |||||||||
| > > | PWM port pins: D0 (TIM1CH3), D1 (TIM1CH2), and A4 (TIM1CH1). | |||||||||
| Changed: | ||||||||||
| < < | Simple test program to set brightness of a LED on pin D6 with a potentiometer on A0. Default PWM frequency is 1 kHz (prescaler set to 42). You can set the prescale with the word pwmprescale from 42 kHz (value 1) down to 0.5 Hz (64000). | |||||||||
| > > | Simple test program to set brightness of a LED on pin D0 with a potentiometer on A0. Default PWM frequency is 1 kHz (prescaler set to 32). You can set the prescale with the word pwmprescale from 32 kHz (value 1) down to 0.5 Hz (64000). | |||||||||
| Changed: | ||||||||||
| < < | 5 6 dmod \ set D6 to PWM | |||||||||
| > > | 5 0 dmod \ set D0 to PWM | |||||||||
| : pwm ( -- ) begin | ||||||||||
| Changed: | ||||||||||
| < < | 0 apin@ 4 / 6 pwmpin! | |||||||||
| > > | 0 apin@ 4 / 0 pwmpin! | |||||||||
| 10 osDelay drop key? until | ||||||||||
| Line: 272 to 272 | ||||||||||
| A servo pulse of 1.5 ms width will typically set the servo to its "neutral" position (typically half of the specified full range), a pulse of 1.0 ms will set it to 0°, and a pulse of 2.0 ms to 90° (for a 90° servo). The physical limits and timings of the servo hardware varies between brands and models, but a general servo's full angular motion will travel somewhere in the range of 90° – 180° and the neutral position (45° or 90°) is almost always at 1.5 ms. This is the "standard pulse servo mode" used by all hobby analog servos. | ||||||||||
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| < < | The BSPs default PWM frequency is 1 kHz, 50 Hz is 20 times slower. The divider is therefore 42 * 20 = 840. | |||||||||
| > > | The BSPs default PWM frequency is 1 kHz, 50 Hz is 20 times slower. The divider is therefore 32 * 20 = 640. | |||||||||
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| Line: 287 to 287 | ||||||||||
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| Changed: | ||||||||||
| < < | 840 pwmprescale 5 5 dmod \ set D5 to PWM | |||||||||
| > > | 640 pwmprescale 5 0 dmod \ set D0 to PWM | |||||||||
| : servo ( -- ) begin 130 40 do | ||||||||||
| Changed: | ||||||||||
| < < | i 5 pwmpin! | |||||||||
| > > | i 0 pwmpin! | |||||||||
| i neopixel! i 40 = if 1000 \ give some more time to get back | ||||||||||
| Line: 332 to 332 | ||||||||||
Output Compare | ||||||||||
| Changed: | ||||||||||
| < < | Output compare TIM2: D0, D1 | |||||||||
| > > | Output compare TIM2: D5, D6, and D13 | |||||||||
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| Changed: | ||||||||||
| < < | 7 0 dmod \ output compare for D0 7 1 dmod \ output compare for D1 | |||||||||
| > > | 7 5 dmod \ output compare for D5 7 6 dmod \ output compare for D6 7 13 dmod \ output compate for D13 | |||||||||
| : oc-toggle ( -- ) 5000000 ICOCperiod! \ 5 s period ICOCstart | ||||||||||
| Changed: | ||||||||||
| < < | 3 0 OCmod 1000000 0 OCstart \ toggle D0 after 1 s 3 1 OCmod 2000000 1 OCstart \ toggle D1 after 2 s | |||||||||
| > > | 3 5 OCmod 1000000 5 OCstart \ toggle D5 after 1 s 3 6 OCmod 2000000 5 OCstart \ toggle D6 after 2 s 3 13 OCmod 3000000 13 OCstart \ toggle D13 after 3 s | |||||||||
| begin waitperiod cr .time | ||||||||||
| Line: 353 to 355 | ||||||||||
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When you abort (hit any key) the program, the timer still runs and controls the port pins. To stop the port pins:
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| Changed: | ||||||||||
| < < | 0 OCstop 1 OCstop | |||||||||
| > > | 5 OCstop 5 OCstop 13 OCstop | |||||||||
| Or change the prescale to make it faster or slower: | ||||||||||
| Line: 364 to 366 | ||||||||||
Input Capture | ||||||||||
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| < < | This sample program measures the time between the edges on port A1. if no event occurs within 2 seconds, "timeout" is issued. Hit any key to abort program. | |||||||||
| > > | This sample program measures the time between the edges on port A5. if no event occurs within 2 seconds, "timeout" is issued. Hit any key to abort program. | |||||||||
: ic-test ( -- ) | ||||||||||
| Changed: | ||||||||||
| < < | 6 17 dmod \ input capture on A1 | |||||||||
| > > | 6 21 dmod \ input capture on A5 | |||||||||
| ICOCstart 2 ICstart \ both edges ICOCcount@ ( -- count ) | ||||||||||
| Line: 398 to 400 | ||||||||||
| Changed: | ||||||||||
| < < | D11, D12, and D13 can be used as an EXTI line. EXTIs are external interrupt lines, D13 uses EXTI1 (EXTI Line1 interrupt), D12 EXIT2, and D11 EXTI3. | |||||||||
| > > | D5, D6, D11 and D13 can be used as an EXTI line. EXTIs are external interrupt lines, D5 uses EXTI2 (EXTI Line2 interrupt), D6 EXTI3, D11 EXIT8, and D13 EXTI1. | |||||||||
: exti-test ( -- ) | ||||||||||
| Changed: | ||||||||||
| < < | 2 11 EXTImod \ both edges on D11 | |||||||||
| > > | 2 5 EXTImod \ both edges on D5 | |||||||||
| begin | ||||||||||
| Changed: | ||||||||||
| < < | 2000 11 EXTIwait \ wait for edge on D11 with 2 s timeout | |||||||||
| > > | 2000 5 EXTIwait \ wait for edge on D5 (button C) with 2 s timeout | |||||||||
| cr 0= if | ||||||||||
| Changed: | ||||||||||
| < < |
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| ." rising edge" else ." falling edge" | ||||||||||
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