102 lines
4.3 KiB
Markdown
102 lines
4.3 KiB
Markdown
|
# PRUICSS PWM Duty Cycle {#EXAMPLE_PRUICSS_PWM_DUTY_CYCLE}
|
||
|
|
|
||
|
|
[TOC]
|
||
|
|
|
||
|
|
# Introduction
|
||
|
|
|
||
|
|
This example generates a signal for a specified time and duty cycle using
|
||
|
|
PRUICSS PWM. The time and duty cycle can be configured by the user.
|
||
|
|
|
||
|
|
\cond SOC_AM243X
|
||
|
|
|
||
|
|
## AM243X-EVM
|
||
|
|
The example Uses PRUICSSG1 PWM module and does below
|
||
|
|
|
||
|
|
- This example uses PRUICSSG1 PWM module as probing PRUICSSG0 PWM signals requires IO breakout board
|
||
|
|
- Configures PWM0_2_NEG(alias signal PWM0_B2) to generate a 1KHz signal with 25% duty cycle
|
||
|
|
- PWM0_2_NEG(alias signal PWM0_B2) uses IEP0 CMP6 EVENT to control Duty cycle and IEP0 CMP0 to control output Frequency
|
||
|
|
- Configures IEP0 CMP0 value with PWM0_2_NEG(alias signal PWM0_B2) output period value
|
||
|
|
- Configures IEP0 CMP6 value with PWM0_2_NEG(alias signal PWM0_B2) output duty cycle value
|
||
|
|
- PRG1_PWM0_B2 can be probed on J16 PIN1
|
||
|
|
|
||
|
|
#### AM243X-EVM Probe Output
|
||
|
|
\imageStyle{am64x_am243x_evm_duty_example_probe_output.png,width:70%}
|
||
|
|
\image html am64x_am243x_evm_duty_example_probe_output.png "PRUICSS PWM DUTY CYCLE PROBE OUTPUT"
|
||
|
|
|
||
|
|
## AM243X-LP
|
||
|
|
The example Uses PRUICSSG0 PWM module and does below
|
||
|
|
|
||
|
|
- Configures PWM0_0_POS(alias signal PWM0_A0) to generate a 1KHz signal with 25% duty cycle
|
||
|
|
- Configures PWM3_2_NEG(alias signal PWM3_B2) to generate a 1KHz signal with 25% duty cycle
|
||
|
|
- PWM0_0_POS(alias signal PWM0_A0) uses IEP0 CMP1 EVENT to control Duty cycle and IEP0 CMP0 to control output Frequency
|
||
|
|
- PWM3_2_NEG(alias signal PWM3_B2) uses IEP1 CMP12 EVENT to control Duty cycle and IEP0 CMP0 to control output Frequency
|
||
|
|
- Configures IEP0 CMP0 value with PWM0_0_POS(alias signal PWM0_A0) and PWM3_2_NEG(alias signal PWM3_B2) output period value
|
||
|
|
- Configures IEP0 CMP6 value with PWM0_0_POS(alias signal PWM0_A0) output duty cycle value
|
||
|
|
- Configures IEP1 CMP12 value with PWM0_0_POS(alias signal PWM0_A0) output duty cycle value
|
||
|
|
- PWM0_0_POS(alias signal PWM0_A0) and PWM3_2_NEG(alias signal PWM3_B2) will be in sync with respect to each other as IEP0 CMP0 value is used to control output period of these signals
|
||
|
|
- PRG0_PWM0_A0 can be probed on J1.5
|
||
|
|
- PRG0_PWM3_B2 can be probed on J2.8
|
||
|
|
|
||
|
|
#### AM243X-LP Probe Output
|
||
|
|
\image html am243x_lp_duty_example_probe_output.png "PRUICSS PWM DUTY CYCLE PROBE OUTPUT"
|
||
|
|
|
||
|
|
\endcond
|
||
|
|
|
||
|
|
\cond SOC_AM64X
|
||
|
|
|
||
|
|
## AM64X-EVM
|
||
|
|
The example Uses PRUICSSG1 PWM module and does below
|
||
|
|
|
||
|
|
- This example uses PRUICSSG1 PWM module as probing PRUICSSG0 PWM signals requires IO breakout board
|
||
|
|
- Configures PWM0_2_NEG(alias signal PWM0_B2) to generate a 1KHz signal with 25% duty cycle
|
||
|
|
- PWM0_2_NEG(alias signal PWM0_B2) uses IEP0 CMP6 EVENT to control Duty cycle and IEP0 CMP0 to control output Frequency
|
||
|
|
- Configures IEP0 CMP0 value with PWM0_2_NEG(alias signal PWM0_B2) output period value
|
||
|
|
- Configures IEP0 CMP6 value with PWM0_2_NEG(alias signal PWM0_B2) output duty cycle value
|
||
|
|
- PRG1_PWM0_B2 can be probed on J16 PIN1
|
||
|
|
|
||
|
|
#### AM64X-EVM Probe Output
|
||
|
|
\imageStyle{am64x_am243x_evm_duty_example_probe_output.png,width:70%}
|
||
|
|
\image html am64x_am243x_evm_duty_example_probe_output.png "PRUICSS PWM DUTY CYCLE PROBE OUTPUT"
|
||
|
|
|
||
|
|
\endcond
|
||
|
|
|
||
|
|
|
||
|
|
# Supported Combinations {#EXAMPLES_DRIVERS_EPWM_DUTY_CYCLE_COMBOS}
|
||
|
|
|
||
|
|
\cond SOC_AM64X
|
||
|
|
|
||
|
|
Parameter | Value
|
||
|
|
---------------|-----------
|
||
|
|
CPU + OS | r5fss0-0 freertos
|
||
|
|
Toolchain | ti-arm-clang
|
||
|
|
Board | @VAR_BOARD_NAME_LOWER
|
||
|
|
Example folder | examples/drivers/epwm/epwm_duty_cycle/
|
||
|
|
|
||
|
|
\endcond
|
||
|
|
|
||
|
|
\cond SOC_AM243X
|
||
|
|
|
||
|
|
Parameter | Value
|
||
|
|
---------------|-----------
|
||
|
|
CPU + OS | r5fss0-0 freertos
|
||
|
|
Toolchain | ti-arm-clang
|
||
|
|
Boards | @VAR_BOARD_NAME_LOWER, @VAR_LP_BOARD_NAME_LOWER
|
||
|
|
Example folder | examples/drivers/epwm/epwm_duty_cycle/
|
||
|
|
|
||
|
|
\endcond
|
||
|
|
|
||
|
|
# Steps to Run the Example
|
||
|
|
|
||
|
|
- **When using CCS projects to build**, import the CCS project for the required combination
|
||
|
|
and build it using the CCS project menu (see <a href="@VAR_MCU_SDK_DOCS_PATH/CCS_PROJECTS_PAGE.html" target="_blank"> Using SDK with CCS Projects </a>).
|
||
|
|
- **When using makefiles to build**, note the required combination and build using
|
||
|
|
make command (see <a href="@VAR_MCU_SDK_DOCS_PATH/MAKEFILE_BUILD_PAGE.html" target="_blank"> Using SDK with Makefiles </a>)
|
||
|
|
- Launch a CCS debug session and run the executable, see <a href="@VAR_MCU_SDK_DOCS_PATH/CCS_LAUNCH_PAGE.html" target="_blank"> CCS Launch, Load and Run </a>
|
||
|
|
- To probe the PRUICSS PWM output please refer setup details as mentioned above in Introduction section
|
||
|
|
|
||
|
|
# See Also
|
||
|
|
|
||
|
|
\ref PRUICSS_PWM_API
|
||
|
|
|
||
|
|
|