sam3/include/periph_cpu.h¶
CPU specific definitions for internal peripheral handling.
-
HAVE_GPIO_T
¶ Overwrite the default gpio_t type definition.
-
uint32_t
gpio_t
¶
-
PERIPH_SPI_NEEDS_INIT_CS
¶ Declare needed generic SPI functions.
-
PERIPH_SPI_NEEDS_TRANSFER_BYTE
¶
-
PERIPH_SPI_NEEDS_TRANSFER_REG
¶
-
PERIPH_SPI_NEEDS_TRANSFER_REGS
¶
-
ADC_NUMOF
¶ 1
(16U)
-
DAC_NUMOF
¶ DAC configuration, valid for all boards using this CPU.
1
(2U)
The sam3 has a fixed mapping of DAC pins and a fixed number of DAC channels, so this DAC configuration is valid for all boards using this CPU. No need for any board specific configuration.
The sam3’s DAC channels are mapped to the following fixed pins:
- line 0 (ch0): PB15
- line 1 (ch1): PB16
-
HAVE_SPI_MODE_T
¶ Override default SPI modes.
-
enum
@80
¶ - PA
= 0
- port A
- PB
= 1
- port B
- PC
= 2
- port C
- PD
= 3
- port D
- PA
-
enum
gpio_mux_t
¶ - GPIO_MUX_A
= 0x0
- select peripheral function A
- GPIO_MUX_B
= 0x1
- select peripheral function B
- GPIO_MUX_C
= 0x2
- select peripheral function C
- GPIO_MUX_D
= 0x3
- select peripheral function D
- GPIO_MUX_E
= 0x4
- select peripheral function E
- GPIO_MUX_F
= 0x5
- select peripheral function F
- GPIO_MUX_G
= 0x6
- select peripheral function G
- GPIO_MUX_H
= 0x7
- select peripheral function H
- GPIO_MUX_A
= 0
- alternate function A
- GPIO_MUX_B
= 1
- alternate function B
- GPIO_MUX_A
-
enum
spi_mode_t
¶ - SPI_MODE_0
= SPI_MODE_SEL(0, 0)
- mode 0
- SPI_MODE_1
= SPI_MODE_SEL(0, 1)
- mode 1
- SPI_MODE_2
= SPI_MODE_SEL(1, 0)
- mode 2
- SPI_MODE_3
= SPI_MODE_SEL(1, 1)
- mode 3
- SPI_MODE_0
-
HAVE_SPI_CLK_T
¶ Override default SPI clock values.
-
enum
spi_clk_t
¶ - SPI_CLK_4MHZ
= 4000000
- drive the SPI bus with 4MHz
- SPI_CLK_100KHZ
= SPI_CLK_SEL(0, 1, 1)
- 16/128 -> 125KHz
- SPI_CLK_400KHZ
= SPI_CLK_SEL(1, 1, 0)
- 16/32 -> 500KHz
- SPI_CLK_1MHZ
= SPI_CLK_SEL(0, 0, 1)
- 16/16 -> 1MHz
- SPI_CLK_5MHZ
= SPI_CLK_SEL(0, 0, 0)
- 16/4 -> 4MHz
- SPI_CLK_10MHZ
= SPI_CLK_SEL(1, 0, 0)
- 16/2 -> 8MHz
- SPI_CLK_4MHZ
-
HAVE_ADC_RES_T
¶ Override ADC resolution values.
-
enum
adc_res_t
¶ - ADC_RES_7BIT
= (0 << 4)
- ADC resolution: 7 bit.
- ADC_RES_9BIT
= (1 << 4)
- ADC resolution: 9 bit.
- ADC_RES_11BIT
- ADC resolution: 11 bit.
- ADC_RES_6BIT
= (0xa00)
- not supported by hardware
- ADC_RES_8BIT
= (0xb00)
- not supported by hardware
- ADC_RES_10BIT
= (2 << 4)
- ADC resolution: 10 bit.
- ADC_RES_12BIT
= (3 << 4)
- ADC resolution: 12 bit.
- ADC_RES_14BIT
= (0xc00)
- not supported by hardware
- ADC_RES_16BIT
= (0xd00)
- not supported by hardware
- ADC_RES_7BIT
-
GPIO_UNDEF
¶ Definition of a fitting UNDEF value.
1
(0xffffffff)
-
GPIO_PIN
( x, y)¶ Define a CPU specific GPIO pin generator macro.
1
(((uint32_t)PIOA + (x << 9)) | y)
-
CPUID_LEN
¶ Length of the CPU_ID in octets.
1
(16U)
-
TIMER_MAX_VAL
¶ All SAM3 timers are 32-bit wide.
1
(0xffffffff)
-
TIMER_CHANNELS
¶ We use 3 channels for each defined timer.
1
(3)
-
GPIO_MODE
( io, pu, od)¶ Generate GPIO mode bitfields.
1
(io | (pu << 1) | (od << 2))
We use 3 bit to determine the pin functions:
- bit 0: in/out
- bit 1: PU enable
- bit 2: OD enable
-
void
gpio_init_mux
(gpio.h::gpio_t
pin,sam0_common/include/periph_cpu_common.h::gpio_mux_t
mux)¶ Configure the given GPIO pin to be used with the given MUX setting.
Parameters
pin: GPIO pin to configure mux: MUX setting to use
-
struct
timer_conf_t
¶ Timer configuration.
Timer configuration data.
Timer configuration options.
Define timer configuration values.
General purpose timers (GPT[0-3]) are configured consecutively and in order (without gaps) starting from GPT0, i.e. if multiple timers are enabled.
Note
The two timers must be adjacent to each other (e.g. TIMER0 and TIMER1, or TIMER2 and TIMER3, etc.).
-
uint_fast8_t
chn
¶ number of channels
-
uint_fast8_t
cfg
¶ timer config word
-
timer_dev_t
prescaler
¶ the lower numbered neighboring timer
-
timer_dev_t
timer
¶ the higher numbered timer
-
cc2538.h::IRQn_Type
irq
¶ number of the higher timer IRQ channel
-
TIMER_TypeDef *
prescaler
¶ the lower numbered neighboring timer
-
TIMER_TypeDef *
timer
¶ the higher numbered timer
-
uint8_t
pre_cmu
¶ prescale timer bit in CMU register, the timer bit is deducted from this
-
uint8_t
irqn
¶ number of the higher timer IRQ channel
global IRQ channel
IRQ number of the timer device.
-
NRF_TIMER_Type *
dev
¶ timer device
-
uint8_t
channels
¶ number of channels available
-
uint8_t
bitmode
¶ counter width
-
Tc *
dev
¶ timer device
-
uint8_t
id_ch0
¶ ID of the timer’s first channel.
-
TIM_TypeDef *
dev
¶ timer device
-
uint32_t
max
¶ maximum value to count to (16/32 bit)
-
uint32_t
rcc_mask
¶ corresponding bit in the RCC register
-
uint8_t
bus
¶ APBx bus the timer is clock from.
-
uint_fast8_t
-
struct
uart_conf_t
¶ UART device configuration.
Structure for UART configuration data.
UART configuration data.
UART module configuration options.
-
cc2538_uart_t *
dev
¶ pointer to the used UART device
UART device base register address.
Pointer to module hardware registers.
-
gpio.h::gpio_t
rx_pin
¶ pin used for RX
RX pin.
Pin used for RX.
-
gpio.h::gpio_t
tx_pin
¶ pin used for TX
TX pin.
Pin used for TX.
-
gpio.h::gpio_t
cts_pin
¶ CTS pin - set to GPIO_UNDEF when not using.
-
gpio.h::gpio_t
rts_pin
¶ RTS pin - set to GPIO_UNDEF when not using.
-
void *
dev
¶ UART, USART or LEUART device used.
Pointer to module hardware registers.
-
uint32_t
loc
¶ location of UART pins
-
CMU_Clock_TypeDef
cmu
¶ the device CMU channel
-
cc2538.h::IRQn_Type
irq
¶ the devices base IRQ channel
-
USART_TypeDef *
dev
¶ USART device used.
UART device base register address.
-
uint8_t
loc
¶ location of USART pins (AF)
-
uint8_t
cmu
¶ the device CMU channel
-
uint8_t
irq
¶ the devices base IRQ channel
-
uint32_t
freq
¶ Module clock frequency, usually CLOCK_CORECLOCK or CLOCK_BUSCLOCK.
-
gpio.h::gpio_t
pin_rx
¶ RX pin, GPIO_UNDEF disables RX.
-
gpio.h::gpio_t
pin_tx
¶ TX pin.
-
uint32_t
pcr_rx
¶ Pin configuration register bits for RX.
-
uint32_t
pcr_tx
¶ Pin configuration register bits for TX.
-
uint32_t *
scgc_addr
¶ Clock enable register, in SIM module.
-
uint8_t
scgc_bit
¶ Clock enable bit, within the register.
-
kinetis/include/periph_cpu.h::uart_mode_t
mode
¶ UART mode: data bits, parity, stop bits.
-
kinetis/include/periph_cpu.h::uart_type_t
type
¶ Hardware module type (KINETIS_UART or KINETIS_LPUART)
-
SercomUsart *
dev
¶ pointer to the used UART device
-
sam0_common/include/periph_cpu_common.h::gpio_mux_t
mux
¶ alternative function for pins
MUX used for pins.
-
sam0_common/include/periph_cpu_common.h::uart_rxpad_t
rx_pad
¶ pad selection for RX line
-
sam0_common/include/periph_cpu_common.h::uart_txpad_t
tx_pad
¶ pad selection for TX line
-
sam0_common/include/periph_cpu_common.h::uart_flag_t
flags
¶ set optional SERCOM flags
-
uint32_t
gclk_src
¶ GCLK source which supplys SERCOM.
-
Uart *
dev
¶ U(S)ART device used.
-
uint8_t
pmc_id
¶ bit in the PMC register of the device
-
cc2538.h::IRQn_Type
irqn
¶ IRQ number for this module.
IRQ channel.
-
uint32_t
rcc_mask
¶ bit in clock enable register
-
stm32_common/include/periph_cpu_common.h::gpio_af_t
rx_af
¶ alternate function for RX pin
-
stm32_common/include/periph_cpu_common.h::gpio_af_t
tx_af
¶ alternate function for TX pin
-
uint8_t
bus
¶ APB bus.
-
cc2538_uart_t *
-
struct
pwm_chan_conf_t
¶ PWM channel configuration.
PWM channel configuration data.
-
uint8_t
index
¶ TIMER channel to use.
-
gpio.h::gpio_t
pin
¶ pin used for pwm
GPIO pin connected to the channel.
-
uint32_t
loc
¶ location of the pin
-
uint8_t
hwchan
¶ the HW channel used for a logical channel
-
uint8_t
-
struct
spi_conf_t
¶ SPI module configuration options.
Structure for SPI configuration data.
SPI configuration data.
SPI device configuration.
SPI configuration values.
SPI configuration data structure.
-
uint8_t
num
¶ number of SSI device, i.e.
0 or 1
-
gpio.h::gpio_t
mosi_pin
¶ pin used for MOSI
MOSI pin.
used MOSI pin
-
gpio.h::gpio_t
miso_pin
¶ pin used for MISO
MISO pin.
used MISO pin
-
gpio.h::gpio_t
sck_pin
¶ pin used for SCK
-
gpio.h::gpio_t
cs_pin
¶ pin used for CS
HWCS pin, set to GPIO_UNDEF if not mapped.
-
SPI_Type *
dev
¶ SPI device to use.
-
gpio.h::gpio_t
pin_miso
¶ MISO pin used.
-
gpio.h::gpio_t
pin_mosi
¶ MOSI pin used.
-
gpio.h::gpio_t
pin_clk
¶ CLK pin used.
-
gpio.h::gpio_t
pin_cs
()¶ pins used for HW cs lines
-
kinetis/include/periph_cpu.h::gpio_pcr_t
pcr
¶ alternate pin function values
-
uint32_t
simmask
¶ bit in the SIM register
-
unsigned long
ssi_sysctl
¶ SSI device in sysctl.
-
unsigned long
ssi_base
¶ SSI base address.
-
unsigned long
gpio_sysctl
¶ GPIO device in sysctl.
-
unsigned long
gpio_port
¶ GPIO port.
-
unsigned long
clk
¶ pin used for SCK
-
unsigned long
fss
¶ pin used for FSS
-
unsigned long
rx
¶ pin used for MISO
-
unsigned long
tx
¶ pin used for MOSI
-
unsigned long
mask
¶ Pin mask.
-
struct spi_conf_t::@74
pins
¶ Pin setting.
-
NRF_SPI_Type *
dev
¶ SPI device used.
-
uint8_t
sclk
¶ CLK pin.
-
uint8_t
mosi
¶ MOSI pin.
-
uint8_t
miso
¶ MISO pin.
-
SercomSpi *
dev
¶ pointer to the used SPI device
-
gpio.h::gpio_t
clk_pin
¶ used CLK pin
-
sam0_common/include/periph_cpu_common.h::gpio_mux_t
miso_mux
¶ alternate function for MISO pin (mux)
-
sam0_common/include/periph_cpu_common.h::gpio_mux_t
mosi_mux
¶ alternate function for MOSI pin (mux)
-
sam0_common/include/periph_cpu_common.h::gpio_mux_t
clk_mux
¶ alternate function for CLK pin (mux)
-
sam0_common/include/periph_cpu_common.h::spi_misopad_t
miso_pad
¶ pad to use for MISO line
-
sam0_common/include/periph_cpu_common.h::spi_mosipad_t
mosi_pad
¶ pad to use for MOSI and CLK line
-
Spi *
dev
¶ SPI module to use.
-
uint8_t
id
¶ corresponding ID of that module
-
gpio.h::gpio_t
clk
¶ pin mapped to the CLK line
-
gpio.h::gpio_t
mosi
¶ pin mapped to the MOSI line
-
gpio.h::gpio_t
miso
¶ pin mapped to the MISO line
-
sam0_common/include/periph_cpu_common.h::gpio_mux_t
mux
¶ pin MUX setting
-
SPI_TypeDef *
dev
¶ SPI device base register address.
-
gpio.h::gpio_t
sclk_pin
¶ SCLK pin.
-
stm32_common/include/periph_cpu_common.h::gpio_af_t
af
¶ pin alternate function
-
uint32_t
rccmask
¶ bit in the RCC peripheral enable register
-
uint8_t
apbbus
¶ APBx bus the device is connected to.
-
uint8_t