#include <arch/arm.h>
#include <sys/timer.h>
#include <cfg/spi.h>
#include <cfg/arch/gpio.h>
#include <dev/spibus.h>
#include <dev/gpio.h>
#include <arch/cm3/stm/stm32f10x_rcc.h>
#include <arch/cm3/stm/stm32f10x_gpio.h>
#include <arch/cm3/stm/stm32f10x_usart.h>
#include <dev/irqreg.h>
#include <sys/event.h>
#include <sys/nutdebug.h>
#include <stdlib.h>
#include <errno.h>

Include dependency graph for stm32_usart3_spi.c:

Functions
int	Stm32UsartBusWait (NUTSPINODE *node, uint32_t tmo)
	Wait until all SPI bus transfers are done.
int	Stm32UsartSpiSetup (NUTSPINODE *node)
	Update SPI shadow registers.
int	Stm32Usart3ChipSelect (uint_fast8_t cs, uint_fast8_t hi)
	Set the specified chip select to a given level.
int	Stm32Usart3BusDeselect (NUTSPINODE *node)
	Deselect a device on the first SPI bus.
int	Stm32Usart3BusSelect (NUTSPINODE *node, uint32_t tmo)
	Select a device on the first SPI bus.
int	Stm32UsartBusNodeInit (NUTSPINODE *node)
	Initialize an SPI bus node.
int	Stm32UsartBusTransfer (NUTSPINODE node, const void txbuf, void *rxbuf, int xlen)
	Transfer data on the SPI bus using single buffered interrupt mode.
Variables
IRQ_HANDLER	sig_USART3
	IRQ Handler for USART 1.
NUTSPIBUS	spiUsart3BusStm32

Function Documentation

int Stm32UsartBusWait	(	NUTSPINODE *	node,
		uint32_t	tmo
	)

Wait until all SPI bus transfers are done.

Parameters:

node	Specifies the SPI bus node.
tmo	Timeout in milliseconds. To disable timeout, set this parameter to NUT_WAIT_INFINITE.

Returns:: Always 0.

Referenced by Stm32Usart3BusDeselect().

int Stm32UsartSpiSetup ( NUTSPINODE * node )

Update SPI shadow registers.

Parameters:

node	Specifies the SPI bus node.

Returns:: Always 0.

References USART_TypeDef::BRR, _NUTSPIBUS::bus_base, USART_TypeDef::CR1, USART_TypeDef::CR2, _NUTSPINODE::node_bits, _NUTSPINODE::node_bus, _NUTSPINODE::node_mode, _NUTSPINODE::node_rate, _NUTSPINODE::node_stat, NULL, NUTASSERT, NutClockGet, SPI_MODE_CPHA, SPI_MODE_CPOL, SPI_MODE_UPDATE, USART_Clock_Enable, USART_CPHA_2Edge, USART_CPOL_High, USART_LastBit_Enable, USART_Mode_Rx, USART_Mode_Tx, and USART_WordLength_9b.

Referenced by Stm32Usart3BusSelect(), and Stm32UsartBusNodeInit().

int Stm32Usart3ChipSelect	(	uint_fast8_t	cs,
		uint_fast8_t	hi
	)

Set the specified chip select to a given level.

References EIO, errno, GpioPinSetHigh, GpioPinSetLow, NUTGPIO_PORTD, and rc.

Referenced by Stm32Usart3BusDeselect(), Stm32Usart3BusSelect(), and Stm32UsartBusNodeInit().

int Stm32Usart3BusDeselect ( NUTSPINODE * node )

Deselect a device on the first SPI bus.

Deactivates the chip select and unlocks the bus.

Parameters:

node	Specifies the SPI bus node.

Returns:: Always 0.

References _NUTSPIBUS::bus_mutex, _NUTSPINODE::node_bus, _NUTSPINODE::node_cs, _NUTSPINODE::node_mode, NULL, NUT_WAIT_INFINITE, NUTASSERT, NutEventPost(), SPI_MODE_CSHIGH, Stm32Usart3ChipSelect(), and Stm32UsartBusWait().

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int Stm32Usart3BusSelect	(	NUTSPINODE *	node,
		uint32_t	tmo
	)

Select a device on the first SPI bus.

Locks and activates the bus for the specified node.

Parameters:

node	Specifies the SPI bus node.
tmo	Timeout in milliseconds. To disable timeout, set this parameter to NUT_WAIT_INFINITE.

Returns:: 0 on success. In case of an error, -1 is returned and the bus is not locked.

References AFIO, USART_TypeDef::BRR, _NUTSPIBUS::bus_base, _NUTSPIBUS::bus_mutex, USART_TypeDef::CR1, USART_TypeDef::CR2, EIO, errno, GPIO_CFG_DISABLED, GPIO_CFG_OUTPUT, GPIO_FullRemap_USART3, GpioPinConfigSet(), _NUTSPINODE::node_bus, _NUTSPINODE::node_cs, _NUTSPINODE::node_mode, _NUTSPINODE::node_stat, NULL, NUTASSERT, NutEventPost(), NutEventWait(), NUTGPIO_PORTD, rc, RCC, RCC_APB1Periph_USART3, RCC_APB2Periph_AFIO, RCC_APB2Periph_GPIOD, SPI_MODE_CSHIGH, SPI_MODE_UPDATE, Stm32Usart3ChipSelect(), and Stm32UsartSpiSetup().

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int Stm32UsartBusNodeInit ( NUTSPINODE * node )

Initialize an SPI bus node.

This routine is called for each SPI node, which is registered via NutRegisterSpiDevice().

Parameters:

node	Specifies the SPI bus node.

Returns:: 0 on success or -1 if there is no valid chip select.

References USART_TypeDef::BRR, USART_TypeDef::CR1, USART_TypeDef::CR2, malloc(), _NUTSPINODE::node_bus, _NUTSPINODE::node_cs, _NUTSPINODE::node_mode, _NUTSPINODE::node_stat, NULL, NUTASSERT, rc, SPI_MODE_CSHIGH, Stm32Usart3ChipSelect(), Stm32UsartSpiSetup(), USART_Clock_Enable, USART_LastBit_Enable, USART_Mode_Rx, and USART_Mode_Tx.

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int Stm32UsartBusTransfer	(	NUTSPINODE *	node,
		const void *	txbuf,
		void *	rxbuf,
		int	xlen
	)

Transfer data on the SPI bus using single buffered interrupt mode.

A device must have been selected by calling At91SpiSelect().

Parameters:

node	Specifies the SPI bus node.
txbuf	Pointer to the transmit buffer. If NULL, undetermined byte values are transmitted.
rxbuf	Pointer to the receive buffer. If NULL, then incoming data is discarded.
xlen	Number of bytes to transfer.

Returns:: Always 0.

References _NUTSPIBUS::bus_base, USART_TypeDef::DR, _NUTSPINODE::node_bus, NULL, NUTASSERT, USART_TypeDef::SR, and USART_FLAG_RXNE.

Variable Documentation

IRQ_HANDLER sig_USART3

Initial value:

IRQ Handler for USART 1.

IRQ Handler for USART 3.

NUTSPIBUS spiUsart3BusStm32

Initial value:

 {
    NULL,                       
    NULL,                       
    USART3_BASE,                  
    &sig_USART3,                  
    Stm32UsartBusNodeInit,         
    Stm32Usart3BusSelect,          
    Stm32Usart3BusDeselect,        
    Stm32UsartBusTransfer,
    Stm32UsartBusWait,
    NutSpiBusSetMode,           
    NutSpiBusSetRate,           
    NutSpiBusSetBits            
}

Functions

Variables

Function Documentation

Variable Documentation