init486.h File Reference

STM32L476-Discovery configuration routines to support ECE 486. More...

#include <stdint.h>

Go to the source code of this file.

Macros
#define	ERROR_LED   LED4
	Red LED, STM32L476G-Discovery. More...
#define	NORMAL_LED   LED5
	Green LED, STM32L476G-Discovery. More...
#define	FS_2K   40000
	2 ksamples/sec More...
#define	FS_4K   20000
	4 ksamples/sec More...
#define	FS_5K   16000
	5 ksamples/sec More...
#define	FS_8K   10000
	8 ksamples/sec More...
#define	FS_10K   8000
	10 ksamples/sec More...
#define	FS_16K   5000
	16 ksamples/sec More...
#define	FS_20K   4000
	20 ksamples/sec More...
#define	FS_24K   3333
	24.0024 ksamples/sec More...
#define	FS_25K   3200
	25 ksamples/sec More...
#define	FS_32K   2500
	32 ksamples/sec More...
#define	FS_40K   2000
	40 ksamples/sec More...
#define	FS_48K   1667
	47.9904 ksamples/sec More...
#define	FS_50K   1600
	50 ksamples/sec More...
#define	FS_64K   1250
	64 ksamples/sec More...
#define	FS_80K   1000
	80 ksamples/sec More...
#define	FS_96K   833
	96.0384 ksamples/sec More...
#define	FS_100K   800
	100 ksamples/sec More...
#define	FS_125K   640
	125 ksamples/sec More...
#define	FS_128K   625
	128 ksamples/sec More...
#define	FS_160K   500
	160 ksamples/sec More...
#define	FS_200K   400
	200 ksamples/sec More...
#define	FS_250K   320
	250 ksamples/sec More...
#define	FS_320K   250
	320 ksamples/sec More...
#define	FS_400K   200
	400 ksamples/sec More...
#define	FS_500K   160
	500 ksamples/sec More...
#define	FS_625K   128
	625 ksamples/sec More...
#define	FS_640K   125
	640 ksamples/sec More...
#define	FS_800K   100
	800 ksamples/sec More...
#define	FS_1000K   80
	1000 ksamples/sec More...
#define	DIGITAL_IO_SET()   HAL_GPIO_WritePin(DIGITAL_IO_PORT, DIGITAL_IO_PIN, GPIO_PIN_SET)
#define	DIGITAL_IO_RESET()   HAL_GPIO_WritePin(DIGITAL_IO_PORT, DIGITAL_IO_PIN, GPIO_PIN_RESET)
#define	DIGITAL_IO_TOGGLE()   HAL_GPIO_TogglePin(DIGITAL_IO_PORT, DIGITAL_IO_PIN)

Enumerations
enum	Num_Channels_In { MONO_IN, STEREO_IN }
	Number of input audio channels. More...
enum	Num_Channels_Out { MONO_OUT, STEREO_OUT }
	Number of output audio channels. More...
enum	Clock_Reference { MSI_INTERNAL_RC, HSE_EXTERNAL_8MHz }
	Clock Reference Source. More...

Functions
void	initialize (uint16_t timer_count_value, enum Num_Channels_In chanin, enum Num_Channels_Out chanout)
	Wrapper function to perform all processor initialization for ECE 486. More...
void	initialize_ece486 (uint16_t timer_count_value, enum Num_Channels_In chanin, enum Num_Channels_Out chanout, enum Clock_Reference clkref)
	Wrapper function to perform all processor initialization for ECE 486. More...
float	getsamplingfrequency (void)
	Simple function to return the best guess at the actual sampling frequency. More...

Variables
enum Num_Channels_Out	Output_Configuration
enum Num_Channels_In	Input_Configuration

Detailed Description

STM32L476-Discovery configuration routines to support ECE 486.

!

Author

Don Hummels

Date

Jan 2016

Contains all of the subroutines to configure various peripherals of the stm32L476 RCC, GPIO ports, DMAs, ADCs, DACs, etc.

Definition in file init486.h.

Enumeration Type Documentation

enum Clock_Reference

Clock Reference Source.

By default, the STM32L476G-Discovery board uses the MSI internal RC Oscillator as its clock source. Specify MSI_INTERNAL_RC for an unmodified board (SB18 Opened, SB21 and SB22 closed).

By modifying jumpers on the board, an external clock reference driving the high speed external (HSE) OSC_IN pin can be used. The external clock can be provided by the ST-LINK MCU, or driven externally through the PH0 pin on the P2 header (pin 9). Specify HSE_EXTERNAL_8MHz to use this improved clock source if your board has been modified.

• 8 MHz XTAL Ref from ST-LINK MCU: SB18 closed, SB22 opened, R89 not fitted.
• External 8MHz signal on PH0 on P2 header: SB18 opened, SB22 closed, R89 not fitted.

Enumerator
MSI_INTERNAL_RC	Internal MSI RC Oscillator.
HSE_EXTERNAL_8MHz	External 8MHz reference.

Definition at line 176 of file init486.h.

enum Num_Channels_In

Number of input audio channels.

Enumerator
MONO_IN	Mono Input: Only configure ADC1, single DMA Transfer.
STEREO_IN	Stereo Input: Configure ADC1 and ADC2, dual DMA Transfer.

Definition at line 144 of file init486.h.

enum Num_Channels_Out

Number of output audio channels.

Enumerator
MONO_OUT	Mono Output: Only configure DAC1, single DMA Transfer.
STEREO_OUT	Stereo Output: Configure DAC1 and DAC2, dual DMA Transfer.

Definition at line 153 of file init486.h.

Variable Documentation

enum Num_Channels_In Input_Configuration

Definition at line 88 of file init486.c.

enum Num_Channels_Out Output_Configuration

Definition at line 87 of file init486.c.