# \#rcm4100

**URL:** https://forums.digi.com/tag/rcm4100/504.md

[Latest](https://forums.digi.com/latest.md) · [Categories](https://forums.digi.com/categories.md) · [Tags](https://forums.digi.com/tags.md)

---

## [how to dynamically program pwm output on rcm4100](https://forums.digi.com/t/how-to-dynamically-program-pwm-output-on-rcm4100/23028)

<div class="topic-metadata">

**Author:** [@martingr](https://forums.digi.com/u/martingr)\
**Replies:** 2\
**Last updated:** [April 6, 2022, 8:51am UTC](https://forums.digi.com/t/how-to-dynamically-program-pwm-output-on-rcm4100/23028 "2022-04-06T08:51:16Z")

</div>

---

## [RCM4100 FAT32 support?](https://forums.digi.com/t/rcm4100-fat32-support/19335)

<div class="topic-metadata">

**Author:** [@Jim\_255](https://forums.digi.com/u/Jim_255)\
**Replies:** 1\
**Last updated:** [March 23, 2018, 6:24pm UTC](https://forums.digi.com/t/rcm4100-fat32-support/19335 "2018-03-23T18:24:01Z")

</div>

Has anyone developed libraries for FAT32 on Dynamic C 10.72C for the Rabbit 4000 on the RCM4100 device? I have ported the elm chan FatFS (http://elm-chan.org/fsw/ff/00index\_e.html) for ARM devices years ago. I’d hate to…

---

## [How to dynamically re-allocate serial buffer sizes?](https://forums.digi.com/t/how-to-dynamically-re-allocate-serial-buffer-sizes/18554)

<div class="topic-metadata">

**Author:** [@DBurghard](https://forums.digi.com/u/DBurghard)\
**Replies:** 3\
**Last updated:** [July 20, 2017, 10:06am UTC](https://forums.digi.com/t/how-to-dynamically-re-allocate-serial-buffer-sizes/18554 "2017-07-20T10:06:49Z")

</div>

I am using an RCM4100 or RCM4200 processor. For port D, for example, I know I must define the DINBUFSIZE AND DOUTBUFSIZE parameters, to say, 63 bytes. That works fine if I am using defines to alter the way the program …

---

## [accelerometer](https://forums.digi.com/t/accelerometer/16508)

<div class="topic-metadata">

**Author:** [@FernandoM](https://forums.digi.com/u/FernandoM)\
**Replies:** 6\
**Last updated:** [April 18, 2016, 2:44pm UTC](https://forums.digi.com/t/accelerometer/16508 "2016-04-18T14:44:53Z")

</div>

Hi, I have one question about the connection between rcm4100 and a accelerometer sensor (ADXL345). if you can help me, please tell me, what is the first that i need to do? how I can to make an a communication using I2…

---

## [How to safely read/write from UserBlock for RCM4100](https://forums.digi.com/t/how-to-safely-read-write-from-userblock-for-rcm4100/13330)

<div class="topic-metadata">

**Author:** [@DBurghard](https://forums.digi.com/u/DBurghard)\
**Replies:** 3\
**Last updated:** [July 18, 2014, 3:16pm UTC](https://forums.digi.com/t/how-to-safely-read-write-from-userblock-for-rcm4100/13330 "2014-07-18T15:16:00Z")

</div>

I’m using an RCM4100 or RCM4200. I have an array of 100 floating point user setpoint numbers that I would like to store in the User Block area. This is my first program with this type of processor. I currently have my…

---

## [Does anyone have C code for using Microchip MCP23S08 or 17 I/O expanders (SPI) with RCM4100/4200?](https://forums.digi.com/t/does-anyone-have-c-code-for-using-microchip-mcp23s08-or-17-i-o-expanders-spi-with-rcm4100-4200/11570)

<div class="topic-metadata">

**Author:** [@davidb\_CSI](https://forums.digi.com/u/davidb_CSI)\
**Replies:** 2\
**Last updated:** [August 6, 2013, 12:18pm UTC](https://forums.digi.com/t/does-anyone-have-c-code-for-using-microchip-mcp23s08-or-17-i-o-expanders-spi-with-rcm4100-4200/11570 "2013-08-06T12:18:42Z")

</div>

I am trying to get two MCP23S08 and two MCP23S17 chips communicating to an RCM4100 processor. I have code written to initialize them but they don’t seem to be responding to my test write requests to their outputs and I’…