periph_conf.h File Reference

Peripheral MCU configuration for the STM32L476G-DISCO board. More...

Detailed Description

Peripheral MCU configuration for the STM32L476G-DISCO board.

Author

Alexandre Abadie alexa.nosp@m.ndre.nosp@m..abad.nosp@m.ie@i.nosp@m.nria..nosp@m.fr

Definition in file periph_conf.h.

#include "periph_cpu.h"
#include "clk_conf.h"
#include "cfg_rtt_default.h"
#include "cfg_usb_otg_fs.h"

Include dependency graph for periph_conf.h:

Go to the source code of this file.

#define	CONFIG_BOARD_HAS_LSE   1

Timer configuration
#define	TIMER_0_ISR   isr_tim5
#define	TIMER_NUMOF   ARRAY_SIZE(timer_config)
static const timer_conf_t	timer_config []

UART configuration
#define	UART_0_ISR   (isr_usart2)
#define	UART_NUMOF   ARRAY_SIZE(uart_config)
static const uart_conf_t	uart_config []
#define	VBAT_ADC   ADC_LINE(5)
	VBAT ADC line.
#define	ADC_NUMOF   ARRAY_SIZE(adc_config)
	Number of ADC devices.
static const adc_conf_t	adc_config []
	ADC configuration. More...

PWM configuration
To find appriopate device and channel find in the MCU datasheet table concerning "Alternate function AF0 to AF7" a text similar to TIM[X]_CH[Y], where: TIM[X] - is device, [Y] - describes used channel (indexed from 0), for example TIM2_CH1 is channel 0 in configuration structure (cc_chan - field), Port column in the table describes connected port. For stm32l476g-disco this information is in the MCU datasheet, Table 17, page 88. Remark! PMW device 0 overlaps with ADC.
#define	PWM_NUMOF   ARRAY_SIZE(pwm_config)
static const pwm_conf_t	pwm_config []

Variable Documentation

adc_config

const adc_conf_t adc_config[]

static

Initial value:

= {
    {GPIO_PIN(PORT_A, 0), 0, 5},  
    {GPIO_PIN(PORT_A, 5), 0, 10}, 
    {GPIO_PIN(PORT_A, 1), 0, 6},  
    {GPIO_PIN(PORT_A, 2), 0, 7},  
    {GPIO_PIN(PORT_A, 3), 0, 8},  
    {GPIO_UNDEF, 0, 18}, 
}

ADC configuration.

Note that we do not configure all ADC channels, and not in the STM32L476VG order. Instead, we just define 5 ADC channels, for the next adjacent 5 pins, from 10 to 14, in the header P1 and the internal VBAT channel.

To find appropriate device and channel find in the board manual, table showing pin assignments and information about ADC - a text similar to ADC[X]_IN[Y], where: [X] - describes used device - indexed from 0, for example ADC12_IN10 is device 0 or device 1, [Y] - describes used channel - indexed from 1, for example ADC12_IN10 is channel 10

For STM32L476VG this information is in MCU datasheet, Table 16, page 73.

VBAT is connected ADC1_IN18 or ADC3_IN18 and a voltage divider is used, so that only 1/3 of the actual VBAT is measured. This allows for a supply voltage higher than the reference voltage.

For STM32L476VG more information is provided in MCU datasheet, in section 3.15.3 - Vbat battery voltage monitoring, page 42.

Definition at line 112 of file periph_conf.h.

pwm_config

const pwm_conf_t pwm_config[]

static

Initial value:

= {
    {
        .dev      = TIM2,
        .rcc_mask = RCC_APB1ENR1_TIM2EN,
        .chan     = { { .pin = GPIO_PIN(PORT_A, 5), .cc_chan = 0},
                      { .pin = GPIO_PIN(PORT_A, 1), .cc_chan = 1},
                      { .pin = GPIO_PIN(PORT_A, 2), .cc_chan = 2},
                      { .pin = GPIO_PIN(PORT_A, 3), .cc_chan = 3} },
        .af       = GPIO_AF1,
        .bus      = APB1
    },
    {
        .dev      = TIM1,
        .rcc_mask = RCC_APB2ENR_TIM1EN,
        .chan     = { { .pin = GPIO_PIN(PORT_E, 11), .cc_chan = 1},
                      { .pin = GPIO_PIN(PORT_E, 13), .cc_chan = 2},
                      { .pin = GPIO_PIN(PORT_E, 14), .cc_chan = 3},
                      { .pin = GPIO_UNDEF,           .cc_chan = 0} },
        .af       = GPIO_AF1,
        .bus      = APB2
    }
}

Definition at line 150 of file periph_conf.h.

timer_config

const timer_conf_t timer_config[]

static

Initial value:

= {
    {
        .dev      = TIM5,
        .max      = 0xffffffff,
        .rcc_mask = RCC_APB1ENR1_TIM5EN,
        .bus      = APB1,
        .irqn     = TIM5_IRQn
    }
}

Definition at line 40 of file periph_conf.h.

uart_config

const uart_conf_t uart_config[]

static

Initial value:

= {
    {
        .dev        = USART2,
        .rcc_mask   = RCC_APB1ENR1_USART2EN,
        .rx_pin     = GPIO_PIN(PORT_D, 6),
        .tx_pin     = GPIO_PIN(PORT_D, 5),
        .rx_af      = GPIO_AF7,
        .tx_af      = GPIO_AF7,
        .bus        = APB1,
        .irqn       = USART2_IRQn,
        .type       = STM32_USART,
        .clk_src    = 0, 
 
 
 
 
    }
}

Definition at line 59 of file periph_conf.h.