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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-01-04 23:46:00 +0000 |
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| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-01-04 23:46:00 +0000 |
| commit | d7fadacd141270fc041f9cae09eb40fbd8ee7bce (patch) | |
| tree | eae6107c5799c69123732da826c2f156428ed477 /nuttx/configs/stm3240g-eval/README.txt | |
| parent | 76faecb6a81930102a78a1c1157b47bc4c177ed5 (diff) | |
| download | px4-nuttx-d7fadacd141270fc041f9cae09eb40fbd8ee7bce.tar.gz px4-nuttx-d7fadacd141270fc041f9cae09eb40fbd8ee7bce.tar.bz2 px4-nuttx-d7fadacd141270fc041f9cae09eb40fbd8ee7bce.zip | |
Clarify some aspects of ADC configuration for the STM32
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4262 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/configs/stm3240g-eval/README.txt')
| -rwxr-xr-x | nuttx/configs/stm3240g-eval/README.txt | 44 |
1 files changed, 11 insertions, 33 deletions
diff --git a/nuttx/configs/stm3240g-eval/README.txt b/nuttx/configs/stm3240g-eval/README.txt index cdf3d82ae..7e4046be9 100755 --- a/nuttx/configs/stm3240g-eval/README.txt +++ b/nuttx/configs/stm3240g-eval/README.txt @@ -418,38 +418,15 @@ STM3240G-EVAL-specific Configuration Options to generate modulated outputs for such things as motor control. If CONFIG_STM32_TIMn is defined (as above) then the following may also be defined to indicate that the timer is intended to be used for pulsed output modulation, ADC conversion, - or DAC conversion. - - CONFIG_STM32_TIM1_PWM - CONFIG_STM32_TIM2_PWM - CONFIG_STM32_TIM3_PWM - CONFIG_STM32_TIM4_PWM - CONFIG_STM32_TIM5_PWM - CONFIG_STM32_TIM8_PWM - CONFIG_STM32_TIM9_PWM - CONFIG_STM32_TIM10_PWM - CONFIG_STM32_TIM11_PWM - CONFIG_STM32_TIM12_PWM - CONFIG_STM32_TIM13_PWM - CONFIG_STM32_TIM14_PWM - - CONFIG_STM32_TIM1_ADC - CONFIG_STM32_TIM2_ADC - CONFIG_STM32_TIM3_ADC - CONFIG_STM32_TIM4_ADC - CONFIG_STM32_TIM5_ADC - CONFIG_STM32_TIM6_ADC - CONFIG_STM32_TIM7_ADC - CONFIG_STM32_TIM8_ADC - - CONFIG_STM32_TIM1_DAC - CONFIG_STM32_TIM2_DAC - CONFIG_STM32_TIM3_DAC - CONFIG_STM32_TIM4_DAC - CONFIG_STM32_TIM5_DAC - CONFIG_STM32_TIM6_DAC - CONFIG_STM32_TIM7_DAC - CONFIG_STM32_TIM8_DAC + or DAC conversion. Note that ADC/DAC require two definition: Not only do you have + to assign the timer (n) for used by the ADC or DAC, but then you also have to + configure which ADC or DAC (m) it is assigned to. + + CONFIG_STM32_TIMn_PWM Reserve timer n for use by PWM, n=1,..,14 + CONFIG_STM32_TIMn_ADC Reserve timer n for use by ADC, n=1,..,14 + CONFIG_STM32_TIMn_ADCm Reserve timer n to trigger ADCm, n=1,..,14, m=1,..,3 + CONFIG_STM32_TIMn_DAC Reserve timer n for use by DAC, n=1,..,14 + CONFIG_STM32_TIMn_DACm Reserve timer n to trigger DACm, n=1,..,14, m=1,..,2 For each timer that is enabled for PWM usage, we need the following additional configuration settings: @@ -604,7 +581,8 @@ Where <subdir> is one of the following: CONFIG_ADC=y : Enable the generic ADC infrastructure CONFIG_STM32_ADC3=y : Enable ADC3 CONFIG_STM32_TIM1=y : Enable Timer 1 - CONFIG_STM32_TIM1_ADC3=y : Assign timer 1 to driver ADC3 sampling + CONFIG_STM32_TIM1_ADC=y : Indicate that timer 1 will be used to trigger an ADC + CONFIG_STM32_TIM1_ADC3=y : Assign timer 1 to drive ADC3 sampling CONFIG_STM32_ADC3_SAMPLE_FREQUENCY=100 : Select a sampling frequency See also apps/examples/README.txt |