btashton commented on issue #1: imxrt fixes 
URL: https://github.com/apache/incubator-nuttx/pull/1#issuecomment-568574794
 
 
   @mubes No complaints on my end (beyond the tedious task of transcribing 
datasheets to code).  This family has been handled so much better by NXP than 
ST did with the STM32 family.
   
   There are a few things I have tweaked across all of the devices, but that is 
mostly minor and usually just using a better define for example because not all 
have PADMUX_WAKEUP:
   ```
   -  if (index >= IMXRT_PADMUX_WAKEUP_INDEX)
   +  if (index >= IMXRT_PADMUX_SNVS_START_INDEX)
   ```
   
   Also a couple typeo's like
   ```
   -#define GPIO_LPSPI1_SDI_2              (GPIO_PERIPH | GPIO_ALT4 | 
GPIO_PADMUX(IMXRT_PADMUX_GPIO_SD_B0_05_INDEX))fb
   +#define GPIO_LPSPI1_SDI_2              (GPIO_PERIPH | GPIO_ALT4 | 
GPIO_PADMUX(IMXRT_PADMUX_GPIO_SD_B0_05_INDEX))
   ```
   
   There is also a GPIOMUX that they added to help with the lower pincount 
while still allowing high speed GPIO.  Anyway I need to just get this stuff out 
for comment.  Probably need a couple nights to get the core code done, not sure 
how long the board bit will take.  The memory interfaces are a little 
different. 
   
   Anyway this is getting off topic for this PR.  I'll put a DRAFT PR up before 
I get the board code done, either a here or on my fork.  
   
   @davids5 I have not forgotten about your offer, just will likely need to 
wait until the 1st with travel.

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