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Document SAMA5D3x-EK/nxwm build problem

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This commit is contained in:
Gregory Nutt 2014-09-20 17:20:10 -06:00
parent 5e285b8bc4
commit f7920fb7be
1 changed files with 35 additions and 0 deletions
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35
configs/sama5d3x-ek/README.txt
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@ -3782,6 +3782,9 @@ Configurations
Bottom line: Not ready for prime time.
2014-9-20: Trying to verify the build today, there are now compilation
errors in the ADC/Touchscreen driver. See STATUS at the end of this file
ov2640:
A test of the SAMA5 ISI using an OV2640 camera.
@ -3850,3 +3853,35 @@ To-Do List
for the PWM and the Timer/Counter drivers. These drivers use the
BOARD_MCK_FREQUENCY definition in more complex ways and will require some
minor redesign and re-testing before they can be available.
10) 2014-9-20: Failed to build the NxWM configuration:
CC: chip/sam_adc.c
chip/sam_adc.c: In function 'sam_adc_interrupt':
chip/sam_adc.c:886:21: warning: unused variable 'priv' [-Wunused-variable]
struct sam_adc_s *priv = &g_adcpriv;
^
chip/sam_adc.c: In function 'sam_adc_initialize':
chip/sam_adc.c:1977:7: error: 'g_adcdev' undeclared (first use in this function)
g_adcdev.ad_ops = &g_adcops;
^
chip/sam_adc.c:1977:7: note: each undeclared identifier is reported only once for each function it appears in
chip/sam_adc.c:1977:27: error: 'g_adcops' undeclared (first use in this function)
g_adcdev.ad_ops = &g_adcops;
^
chip/sam_adc.c:1983:11: error: 'struct sam_adc_s' has no member named 'dev'
priv->dev = &g_adcdev;
^
chip/sam_adc.c:2090:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
The failure occurs because there are no ADC channels configured (as there
should not be) so SAMA5_ADC_HAVE_CHANNELS is not defined (as it should
not be). However, if there are no configured ADC channel, then
sam_adc_initialize() does not compile correctly -- and it should not
given nature the logic that is in place there now.
A quick glance at the history of these files does not reveal what the
obvious solution is so I will need to come back and revisit this in the
future.