Difference between revisions of "PWM Generator"
(→Connection) |
m (→Connection) |
||
| Line 22: | Line 22: | ||
== Connection == | == Connection == | ||
| − | Every channels requieres a port | + | Every channels requieres a port, but since the timers are used, the ports have a predefined assignment - depending on the mcrocontroller. |
Nevertheless you have to do some pin definition. | Nevertheless you have to do some pin definition. | ||
Revision as of 09:28, 23 May 2012
| PWM Generator | |
|---|---|
| Status | Unstable/Broken
|
| menuconfig | I/O->PWM Generator |
| Pinning | yes |
| Ecmd | yes |
| Depends on | ECMD |
| Requires | - |
| Code | https://github.com/ethersex/ethersex/tree/master/hardware/pwm |
Pulse wide modulator generator with up to 3 channels.
This module uses the avr timers to generate the pwm signals, so for every channel a timer is necessary. It depends on the hardware and other modules, if thre timers are available for the the three channels.
To get background infos you can have a look at this tutorial (in german): [AVR-Tutorial: PWM]
Connection
Every channels requieres a port, but since the timers are used, the ports have a predefined assignment - depending on the mcrocontroller.
Nevertheless you have to do some pin definition. Here the version for the AtMega32:
ifdef(`conf_PWM', `dnl #ifdef CH_A_PWM_GENERAL_SUPPORT pin(CHANNEL_A_PWM, PD5, OUTPUT) #endif /* CH_A_PWM_GENERAL_SUPPORT */ #ifdef CH_B_PWM_GENERAL_SUPPORT pin(CHANNEL_B_PWM, PD4, OUTPUT) #endif /* CH_B_PWM_GENERAL_SUPPORT */ #ifdef CH_C_PWM_GENERAL_SUPPORT #error 3 Channel pwm unsupported. #endif /* CH_C_PWM_GENERAL_SUPPORT */ ')
You can also use the script add-hardware (in folder scripts) to generate a board-layout for your current configuration. I don't know the current status of the script - so it is possible, that not every features is supported.
