EVM6418 Board Setup Module
The Board Setup API provides general functions used for board initialization. The EVM6418_init() call must be made before any other BSL functions as it is responsible for all BSL initialization. The EVM6418_rget() and EVM6418_rset() functions are used to access to the asynchronous CPLD interface registers.
The following list summarizes the Board Setup API in terms of its function calls. All programs that use the BSL should include the evm6418.h header file.
In addition to other things, it contains several useful constants:
| Name |
Typical Value |
Description |
| EVM6418_CPLD_BASE |
0x900F0010 |
Address of CPLD in data space |
| EVM6418_USER_REG |
0x0 |
Index of USER_REG CPLD register |
| EVM6418_DC_REG |
0x1 |
Index of DC_REG CPLD register |
| EVM6418_VERSION |
0x4 |
Index of VERSION CPLD register |
| EVM6418_MISC |
0x6 |
Index of MISC CPLD register |
| EVM6418_LCD0 |
0x8 |
Index of LCD0 CPLD register |
| EVM6418_LCD1 |
0x9 |
Index of LCD1 CPLD register |
| EVM6418_BOARD |
0xA |
Index of BOARD CPLD register |
EVM6418_init()
Description
Sets all CPLD registers to their power-on states and initializes internal BSL data structures. Must be called before any other BSL functions.
Required Headers
evm6418.h
Required Libraries
evm6418bsl.lib
Function Prototype
void EVM6418_init( )
Parameters
None
Return Value
None
Example
/* Initialize the board support library */
EVM6418_init();
EVM6418_rget()
Description
Read an 8-bit value from a CPLD register.
Required Headers
evm6418.h
Required Libraries
evm6418bsl.lib
Function Prototype
Uint16 EVM6418_rget(Int16 regnum)
Parameters
regnum – Index of CPLD register.
Return Value
Value of CPLD register
Example
/* Read the FPGA revision number */
version = EVM6418_rget(EVM6418_VERSION);
EVM6418_rset()
Description
Write an 8-bit value to a CPLD register.
Required Headers
evm6418.h
Required Libraries
evm6418bsl.lib
Function Prototype
void EVM6418_rset(Int16 regnum, Uint16 regval)
Parameters
regnum – Index of CPLD register.
regval – Value to set the register to. Only the lower 8 bits are used.
Return Value
None
Example
/* Turn all 8 LEDs on */
EVM6418_rset(EVM6418_LED, 0xff);
EVM6418_wait()
Description
Spin in a loop. Used for short timing loops.
Required Headers
evm6418.h
Required Libraries
evm6418bsl.lib
Function Prototype
void EVM6418_wait(Uint32 delay)
Parameters
delay – number of loop iterations to spin
Return Value
None
Example
/* Spin for 100 loop iterations */
EVM6418_wait(100);
EVM6418_waitusec()
Description
Spin in a loop for a number of microseconds. Used for short timing loops. Roughly calibrated to wall clock time.
Required Headers
evm6418.h
Required Libraries
evm6418bsl.lib
Function Prototype
void EVM6418_waitusec(Uint32 delay)
Parameters
delay – number of microseconds to delay.
Return Value
None
Example
/* Spin for 100 microseconds */
EVM6418_waitusec(100);
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