register « bit « C Data Type Q&A

1. How to share register and bit field definitions between a device driver and the FPGA it controls    stackoverflow.com

Are there any good, existing software tools available to assist in generating C header files with appropriate #defines for register offsets as well as bit definitions from VHDL? If any ...

2. Storing a 4-bit value in the middle of an 8-bit register    stackoverflow.com

I need to count from 0 to 10 and store those values in binary format in ADCON0(5:2). How do I point at bit 5 of this register? Bit 5 is named ...

3. STM32 I2C1 Start bit not set on SR1 register    stackoverflow.com

I am trying to program the stm32 to talk to my i2c EEprom, but it seems like everytime I say:

I2C_GenerateSTART(I2C1, ENABLE);
while( !(I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT)) );  the code hangs here

4. C-macro: set a register field defined by a bit-mask to a given value    stackoverflow.com

I've got 32-bit registers with field defined as bit-masks, e.g.

#define BM_TEST_FIELD 0x000F0000

5. Tweaking same bit in multiple registers in one sentence    stackoverflow.com

I wonder if it is possible to turn on 1st bit in multiple registers using one sentence in C. I got an inspiration here. I would normally turn on 1st bit ...

6. How to input ands save data in register of 16 bit    bytes.com

Is this a real register that exists in real hardware, or is it a demonstration program? With a real register you have to worry about endianness (that is, the logical organization of bits in a C variable is not necessarily the same as the physical arrangement of bits in a register). Some real registers are write-only. That is, you cannot simply ...

7. Register Higer bits and lower bits    bytes.com

8. Reading a register bit    bytes.com

9. 64 bit register manipuate using 1ULL << (a) macro?    bytes.com

timmu wrote:[color=blue] > > If I have set a macro such like: > > #define BIT(a) (1ULL << (a)) > > will something like > *(u64*)REGISTER1 |= BIT(53) > work if i wanna set bit[53] as 1 ? > > I'm running on MIPS which have several 64bit registers, > just don't know if the syntax will work. > > thanks ...

10. How to use REGISTER with a 32 bit compiler    cboard.cprogramming.com

11. Reading a 16 bit Register    cboard.cprogramming.com

Greetings all... (I'm using Borland Turbo C/C++ 3.0) I am using an ADC board (See Getting Started Sheet) attached to an SBC running DOS 6.2. There is only a sparse and seemingly rough documentation for the ADC. The board has a FIFO for reading the 24 channels. When I read from address BASE+0x0A (ADCFIFO), and then the internal pointers should advance ...

12. Accessing HW registers using bit fields and UINT32    cboard.cprogramming.com

Hi - This is a follow up from my last post: How do I force my compiler to access HW registers as 32 bit instead of bytes? but need help with my code. I would like to test that accessing the HW reg using a struct unionized with a UINT32 word, will actually use 32-bits. Here is my code: Code: #include ...

13. 8 bit shift register    forums.devshed.com

i am having some probs wit my c++. was given an assignment in my polytechnic and am struggling with it.i have to do a 8 bit shifting register.i do not know how to do it.and i must be able to control what the user types.meaning that if other than 1 and 0 is entered i must be able to automatically change ...