Hi, could you recommend me an embedded C book or course?, a time ago I read a book about C but was not oriented to embedded (I work with microcontrollers)

 

One of many.
https://www.safetty.net/download/embedded_c_course_pont_2013.pdf
https://barrgroup.com/sites/default/files/barr_c_coding_standard_2018.pdf
Free online edition.

 

Also https://umanovskis.se/files/arm-baremetal-ebook.pdf

 

Hi, could you recommend me an embedded C book or course?, a time ago I read a book about C but was not oriented to embedded (I work with microcontrollers)

C is C.

If you want to see the language used in an embedded context then pick your MCU, it makes little sense to discuss embedded C without the context of an actual real world MCU. Like asking for a book on assembly language without the context of an actual computer.

https://www.amazon.com/dp/0997925949?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_9

 

There are levels of introduction and examples of various types that either resonate or iterate style.
In a college setting you have lecture and lab. This is lab 2 STM32 discovery board. The book is tied to the curriculum.

This handout is 30 page embedded C for STM32 that possibly advanced class and it deals with compiler and goal is GPIO
Developing and Debugging C Programs in MDK-ARM for the STM32L100RC Microcontroller
reference to book by VP Nelson on GPIO interfacing, very powerful.