neorv32_smc.c File Reference

Serial memory controller (SMC) HW driver source file. More...

#include <neorv32.h>

Functions
int	neorv32_smc_available (void)
void	neorv32_smc_setup (int dual, int msize, int cdiv, int rwait, uint8_t rcmd, uint8_t wcmd, uint32_t icmd)
int	neorv32_smc_busy (void)
void	neorv32_smc_pins_enable (void)
void	neorv32_smc_pins_disable (void)
uint32_t	neorv32_smc_get_clockspeed (void)
uint32_t	neorv32_smc_get_baseaddr (void)

Detailed Description

Serial memory controller (SMC) HW driver source file.

Function Documentation

neorv32_smc_available()

int neorv32_smc_available

(

void

)

Check if SMC was synthesized.

Returns

0 if SMC was not synthesized, non-zero if SMC is available.

neorv32_smc_busy()

int neorv32_smc_busy

(

void

)

Check if a SMC memory operation is in progress.

Returns

Zero if SMC is idle, non-zero if memory operation in progress.

neorv32_smc_get_baseaddr()

uint32_t neorv32_smc_get_baseaddr

(

void

)

Get configured SMC memory base address.

Returns

Configured base address for transparent memory access.

neorv32_smc_get_clockspeed()

uint32_t neorv32_smc_get_clockspeed

(

void

)

Get configured SMC SPI clock speed in Hz.

Returns

Configured SMC interface clock speed in Hz.

neorv32_smc_pins_disable()

void neorv32_smc_pins_disable

(

void

)

Disable SMC control of SMC IO pins.

neorv32_smc_pins_enable()

void neorv32_smc_pins_enable

(

void

)

Enable SMC control of SMC IO pins.

neorv32_smc_setup()

void neorv32_smc_setup	(	int	dual,
		int	msize,
		int	cdiv,
		int	rwait,
		uint8_t	rcmd,
		uint8_t	wcmd,
		uint32_t	icmd )

Reset, configure and enable SMC.

Parameters

[in]	dual	Enable dual-chip mode (0,1).
[in]	msize	Memory chip size select (NEORV32_SMC_MSIZE_enum).
[in]	cdiv	Clock divider (3-bit); f_SPI = f_cpu/(2*(cdiv+1)).
[in]	rwait	Number of read access dummy/wait cycles (0..15).
[in]	rcmd	Memory chip read command (8-bit).
[in]	wcmd	Memory chip write command (8-bit).
[in]	icmd	Initialization commands (3x8-bit, LSB-aligned).