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u-boot-stm32
Commit 1cdd1b54 authored by Dmitry Konyshev's avatar Dmitry Konyshev
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RT #82124 Ethernet in U-boot for SF2-DEV-KIT BSP

parent 154b81ef
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board/actel/sf2-dev-kit/Makefile
View file @ 1cdd1b54
......@@ -26,7 +26,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(BOARD).a
COBJS := board.o
COBJS := board.o mss_spi/mss_spi.o zl30362_config.o
SRCS := $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))
......
board/actel/sf2-dev-kit/board.c
View file @ 1cdd1b54
......@@ -36,8 +36,29 @@ void dummy_func(void)
return;
}
extern void configure_zl30362(void);
#define SERDES0_LANE3_REGS 0x40029c00
#define TX_PST_RATIO 0x28
int board_init(void)
{
/* some magic from the Libero design generated source code
to get the PHY working in the SGMII mode */
*(volatile uint32_t*)(SERDES0_LANE3_REGS + TX_PST_RATIO) = 0x0;
/* configure the ZL30362 Clock Network Synchronizer
(required for Ethernet to function in U-boot and Linux) */
configure_zl30362();
CORE_SF2_CFG->config_done = 1u; /* Signal to CoreSF2Reset that peripheral
configuration registers have
been written.*/
#if 0 /* FIXME: init_done is never signalled after a soft reset
if the DDR has been initialized before the reset. */
while(!CORE_SF2_CFG->init_done)
{
; /* Wait for INIT_DONE from CoreSF2Reset. */
}
#endif
return 0;
}
......
board/actel/sf2-dev-kit/mss_spi/mss_spi.c 0 → 100644
View file @ 1cdd1b54
/*******************************************************************************
* (c) Copyright 2008 Actel Corporation. All rights reserved.
*
* SmartFusion microcontroller subsystem SPI bare metal software driver
* implementation.
*
* SVN $Revision: 4566 $
* SVN $Date: 2012-08-23 17:12:11 +0100 (Thu, 23 Aug 2012) $
*/
#include <common.h>
#include "mss_spi.h"
/* #include "../../CMSIS/mss_assert.h" */
#ifdef __cplusplus
extern "C" {
#endif
/***************************************************************************//**
MSS SPI can operate as master or slave.
*/
#define MSS_SPI_MODE_SLAVE 0u
#define MSS_SPI_MODE_MASTER 1u
/***************************************************************************//**
* Mask of transfer protocol and SPO, SPH bits within control register.
*/
#define PROTOCOL_MODE_MASK (uint32_t)0x030000C0
/***************************************************************************//**
* Mask of theframe count bits within the SPI control register.
*/
#define TXRXDFCOUNT_MASK (uint32_t)0x00FFFF00
#define TXRXDFCOUNT_SHIFT (uint32_t)8
/***************************************************************************//**
* SPI hardware FIFO depth.
*/
#define RX_FIFO_SIZE 4u
#define BIG_FIFO_SIZE 32u
/***************************************************************************//**
*
*/
#define RX_IRQ_THRESHOLD (BIG_FIFO_SIZE / 2u)
/***************************************************************************//**
Marker used to detect that the configuration has not been selected for a
specific slave when operating as a master.
*/
#define NOT_CONFIGURED 0xFFFFFFFF
/***************************************************************************//**
* CONTROL register bit masks
*/
#define CTRL_ENABLE_MASK 0x00000001u
#define CTRL_MASTER_MASK 0x00000002u
/***************************************************************************//**
Registers bit masks
*/
/* CONTROL register. */
#define MASTER_MODE_MASK 0x00000002u
#define CTRL_RX_IRQ_EN_MASK 0x00000010u
#define CTRL_TX_IRQ_EN_MASK 0x00000020u
#define CTRL_REG_RESET_MASK 0x80000000u
#define BIGFIFO_MASK 0x20000000u
/* CONTROL2 register */
#define ENABLE_CMD_IRQ_MASK 0x00000010u
#define ENABLE_SSEND_IRQ_MASK 0x00000020u
/* STATUS register */
#define TX_DONE_MASK 0x00000001u
#define RX_DATA_READY_MASK 0x00000002u
#define RX_OVERFLOW_MASK 0x00000004u
#define RX_FIFO_EMPTY_MASK 0x00000040u
#define TX_FIFO_FULL_MASK 0x00000100u
#define TX_FIFO_EMPTY_MASK 0x00000400u
/* MIS register. */
#define TXDONE_IRQ_MASK 0x00000001u
#define RXDONE_IRQ_MASK 0x00000002u
#define RXOVER_IRQ_MASK 0x00000004u
#define RXUNDER_IRQ_MASK 0x00000008u
#define CMD_IRQ_MASK 0x00000010u
#define SSEND_IRQ_MASK 0x00000020u
/* COMMAND register */
#define AUTOFILL_MASK 0x00000001u
#define RX_FIFO_RESET_MASK 0x00000004u
#define TX_FIFO_RESET_MASK 0x00000008u
/***************************************************************************//**
* SPI instance data structures for SPI0 and SPI1. A pointer to these data
* structures must be used as first parameter to any of the SPI driver functions
* to identify the SPI hardware block that will perform the requested operation.
*/
mss_spi_instance_t g_mss_spi0;
volatile mss_spi_instance_t g_mss_spi1;
/***************************************************************************//**
SPI0 interrupt service routine
*/
#if defined(__GNUC__)
__attribute__((__interrupt__)) void SPI0_IRQHandler(void);
#else
void SPI0_IRQHandler(void);
#endif
/***************************************************************************//**
SPI1 interrupt service routine
*/
#if defined(__GNUC__)
__attribute__((__interrupt__)) void SPI1_IRQHandler(void);
#else
void SPI1_IRQHandler(void);
#endif
/***************************************************************************//**
local functions
*/
static void recover_from_rx_overflow(volatile mss_spi_instance_t * this_spi);
/* static void fill_slave_tx_fifo(mss_spi_instance_t * this_spi); */
/* static void read_slave_rx_fifo(mss_spi_instance_t * this_spi); */
/***************************************************************************//**
* MSS_SPI_init()
* See "mss_spi.h" for details of how to use this function.
*/
void MSS_SPI_init
(
volatile mss_spi_instance_t * this_spi
)
{
uint16_t i;
ASSERT((this_spi == &g_mss_spi0) || (this_spi == &g_mss_spi1));
if(this_spi == &g_mss_spi0)
{
this_spi->hw_reg = ((SPI_REVB_TypeDef *) SPI0_BASE);
this_spi->irqn = SPI0_IRQn;
/* reset SPI0 */
SYSREG->SOFT_RST_CR |= SYSREG_SPI0_SOFTRESET_MASK;
/* Clear any previously pended SPI0 interrupt */
/* NVIC_ClearPendingIRQ(SPI0_IRQn); */
/* Take SPI0 out of reset. */
SYSREG->SOFT_RST_CR &= ~SYSREG_SPI0_SOFTRESET_MASK;
this_spi->hw_reg->CONTROL &= ~CTRL_REG_RESET_MASK;
}
else
{
this_spi->hw_reg = ((SPI_REVB_TypeDef *) SPI1_BASE);
this_spi->irqn = SPI1_IRQn;
/* reset SPI1 */
SYSREG->SOFT_RST_CR |= SYSREG_SPI1_SOFTRESET_MASK;
/* Clear any previously pended SPI1 interrupt */
/* NVIC_ClearPendingIRQ(SPI1_IRQn); */
/* Take SPI1 out of reset. */
SYSREG->SOFT_RST_CR &= ~SYSREG_SPI1_SOFTRESET_MASK;
this_spi->hw_reg->CONTROL &= ~CTRL_REG_RESET_MASK;
}
this_spi->frame_rx_handler = 0u;
this_spi->slave_tx_frame = 0u;
this_spi->block_rx_handler = 0u;
this_spi->slave_tx_buffer = 0u;
this_spi->slave_tx_size = 0u;
this_spi->slave_tx_idx = 0u;
this_spi->resp_tx_buffer = 0u;
this_spi->resp_buff_size = 0u;
this_spi->resp_buff_tx_idx = 0u;
for(i = 0u; i < (uint16_t)MSS_SPI_MAX_NB_OF_SLAVES; ++i)
{
this_spi->slaves_cfg[i].ctrl_reg = NOT_CONFIGURED;
}
}
/***************************************************************************//**
*
*
*/
static void recover_from_rx_overflow
(
volatile mss_spi_instance_t * this_spi
)
{
uint32_t control_reg;
uint32_t clk_gen;
uint32_t frame_size;
/*
* Read current SPI hardware block configuration.
*/
control_reg = this_spi->hw_reg->CONTROL;
clk_gen = this_spi->hw_reg->CLK_GEN;
frame_size = this_spi->hw_reg->TXRXDF_SIZE;
/*
* Reset the SPI hardware block.
*/
if(this_spi == &g_mss_spi0)
{
this_spi->hw_reg = ((SPI_REVB_TypeDef *) SPI0_BASE);
this_spi->irqn = SPI0_IRQn;
/* reset SPI0 */
SYSREG->SOFT_RST_CR |= SYSREG_SPI0_SOFTRESET_MASK;
/* Clear any previously pended SPI0 interrupt */
/* NVIC_ClearPendingIRQ(SPI0_IRQn); */
/* Take SPI0 out of reset. */
SYSREG->SOFT_RST_CR &= ~SYSREG_SPI0_SOFTRESET_MASK;
this_spi->hw_reg->CONTROL &= ~CTRL_REG_RESET_MASK;
}
else
{
this_spi->hw_reg = ((SPI_REVB_TypeDef *) SPI1_BASE);
this_spi->irqn = SPI1_IRQn;
/* reset SPI1 */
SYSREG->SOFT_RST_CR |= SYSREG_SPI1_SOFTRESET_MASK;
/* Clear any previously pended SPI1 interrupt */
/* NVIC_ClearPendingIRQ(SPI1_IRQn); */
/* Take SPI1 out of reset. */
SYSREG->SOFT_RST_CR &= ~SYSREG_SPI1_SOFTRESET_MASK;
this_spi->hw_reg->CONTROL &= ~CTRL_REG_RESET_MASK;
}
/*
* Restore SPI hardware block configuration.
*/
this_spi->hw_reg->CONTROL &= ~CTRL_ENABLE_MASK;
this_spi->hw_reg->CONTROL = control_reg;
this_spi->hw_reg->CLK_GEN = clk_gen;
this_spi->hw_reg->TXRXDF_SIZE = frame_size;
this_spi->hw_reg->CONTROL |= CTRL_ENABLE_MASK;
}
/* /\***************************************************************************\//\** */
/* * MSS_SPI_configure_slave_mode() */
/* * See "mss_spi.h" for details of how to use this function. */
/* *\/ */
/* void MSS_SPI_configure_slave_mode */
/* ( */
/* mss_spi_instance_t * this_spi, */
/* mss_spi_protocol_mode_t protocol_mode, */
/* mss_spi_pclk_div_t clk_rate, */
/* uint8_t frame_bit_length */
/* ) */
/* { */
/* ASSERT((this_spi == &g_mss_spi0) || (this_spi == &g_mss_spi1)); */
/* ASSERT(frame_bit_length <= 32); */
/* /\* Set the mode. *\/ */
/* this_spi->hw_reg->CONTROL &= ~CTRL_MASTER_MASK; */
/* /\* Set the clock rate. *\/ */
/* this_spi->hw_reg->CONTROL &= ~CTRL_ENABLE_MASK; */
/* this_spi->hw_reg->CONTROL = (this_spi->hw_reg->CONTROL & ~PROTOCOL_MODE_MASK) | */
/* (uint32_t)protocol_mode | BIGFIFO_MASK; */
/* this_spi->hw_reg->CLK_GEN = (uint32_t)clk_rate; */
/* /\* Set default frame size to byte size and number of data frames to 1. *\/ */
/* this_spi->hw_reg->CONTROL = (this_spi->hw_reg->CONTROL & ~TXRXDFCOUNT_MASK) | ((uint32_t)1 << TXRXDFCOUNT_SHIFT); */
/* this_spi->hw_reg->TXRXDF_SIZE = frame_bit_length; */
/* this_spi->hw_reg->CONTROL |= CTRL_ENABLE_MASK; */
/* } */
/***************************************************************************//**
* MSS_SPI_configure_master_mode()
* See "mss_spi.h" for details of how to use this function.
*/
void MSS_SPI_configure_master_mode
(
volatile mss_spi_instance_t * this_spi,
mss_spi_slave_t slave,
mss_spi_protocol_mode_t protocol_mode,
mss_spi_pclk_div_t clk_rate,
uint8_t frame_bit_length
)
{
ASSERT((this_spi == &g_mss_spi0) || (this_spi == &g_mss_spi1));
ASSERT(slave < MSS_SPI_MAX_NB_OF_SLAVES);
ASSERT(frame_bit_length <= 32);
/* Set the mode. */
this_spi->hw_reg->CONTROL &= ~CTRL_ENABLE_MASK;
this_spi->hw_reg->CONTROL |= CTRL_MASTER_MASK;
this_spi->hw_reg->CONTROL |= CTRL_ENABLE_MASK;
/*
* Keep track of the required register configuration for this slave. These
* values will be used by the MSS_SPI_set_slave_select() function to configure
* the master to match the slave being selected.
*/
if(slave < MSS_SPI_MAX_NB_OF_SLAVES)
{
this_spi->slaves_cfg[slave].ctrl_reg = MASTER_MODE_MASK |
BIGFIFO_MASK |
(uint32_t)protocol_mode |
((uint32_t)1 << TXRXDFCOUNT_SHIFT);
this_spi->slaves_cfg[slave].txrxdf_size_reg = frame_bit_length;
this_spi->slaves_cfg[slave].clk_gen = (uint8_t)clk_rate;
}
}
/***************************************************************************//**
* MSS_SPI_set_slave_select()
* See "mss_spi.h" for details of how to use this function.
*/
void MSS_SPI_set_slave_select
(
volatile mss_spi_instance_t * this_spi,
mss_spi_slave_t slave
)
{
uint32_t rx_overflow;
ASSERT((this_spi == &g_mss_spi0) || (this_spi == &g_mss_spi1));
/* This function is only intended to be used with an SPI master. */
ASSERT((this_spi->hw_reg->CONTROL & CTRL_MASTER_MASK) == CTRL_MASTER_MASK);
ASSERT(this_spi->slaves_cfg[slave].ctrl_reg != NOT_CONFIGURED);
/* Recover from receive overflow. */
rx_overflow = this_spi->hw_reg->STATUS & RX_OVERFLOW_MASK;
if(rx_overflow)
{
recover_from_rx_overflow(this_spi);
}
/* Set the clock rate. */
this_spi->hw_reg->CONTROL &= ~CTRL_ENABLE_MASK;
this_spi->hw_reg->CONTROL = this_spi->slaves_cfg[slave].ctrl_reg;
this_spi->hw_reg->CLK_GEN = this_spi->slaves_cfg[slave].clk_gen;
this_spi->hw_reg->TXRXDF_SIZE = this_spi->slaves_cfg[slave].txrxdf_size_reg;
this_spi->hw_reg->CONTROL |= CTRL_ENABLE_MASK;
/* Set slave select */
this_spi->hw_reg->SLAVE_SELECT |= ((uint32_t)1 << (uint32_t)slave);
}
/***************************************************************************//**
* MSS_SPI_clear_slave_select()
* See "mss_spi.h" for details of how to use this function.
*/
void MSS_SPI_clear_slave_select
(
mss_spi_instance_t * this_spi,
mss_spi_slave_t slave
)
{
uint32_t rx_overflow;
ASSERT((this_spi == &g_mss_spi0) || (this_spi == &g_mss_spi1));
/* This function is only intended to be used with an SPI master. */
ASSERT((this_spi->hw_reg->CONTROL & CTRL_MASTER_MASK) == CTRL_MASTER_MASK);
/* Recover from receive overflow. */
rx_overflow = this_spi->hw_reg->STATUS & RX_OVERFLOW_MASK;
if(rx_overflow)
{
recover_from_rx_overflow(this_spi);
}
this_spi->hw_reg->SLAVE_SELECT &= ~((uint32_t)1 << (uint32_t)slave);
}
/***************************************************************************//**
* MSS_SPI_transfer_frame()
* See "mss_spi.h" for details of how to use this function.
*/
uint32_t MSS_SPI_transfer_frame
(
volatile mss_spi_instance_t * this_spi,
uint32_t tx_bits
)
{
volatile uint32_t dummy;
uint32_t rx_ready;
uint32_t tx_done;
ASSERT((this_spi == &g_mss_spi0) || (this_spi == &g_mss_spi1));
/* This function is only intended to be used with an SPI master. */
ASSERT((this_spi->hw_reg->CONTROL & CTRL_MASTER_MASK) == CTRL_MASTER_MASK);
/* printf("%s %d %s %08x\n", __FILE__, __LINE__, __FUNCTION__, this_spi->hw_reg->STATUS); */
/* Flush Rx FIFO. */
rx_ready = this_spi->hw_reg->STATUS & RX_DATA_READY_MASK;
while(rx_ready)
{
dummy = this_spi->hw_reg->RX_DATA;
dummy = dummy; /* Prevent Lint warning. */
rx_ready = this_spi->hw_reg->STATUS & RX_DATA_READY_MASK;
}
/* printf("%s %d %s %08x\n", __FILE__, __LINE__, __FUNCTION__, this_spi->hw_reg->STATUS); */
/* Send frame. */
this_spi->hw_reg->TX_DATA = tx_bits;
/* Wait for frame Tx to complete. */
tx_done = this_spi->hw_reg->STATUS & TX_DONE_MASK;
while(!tx_done)
{
tx_done = this_spi->hw_reg->STATUS & TX_DONE_MASK;
/* printf("%s %d %s %08x\n", __FILE__, __LINE__, __FUNCTION__, this_spi->hw_reg->STATUS); */
}
/* printf("%s %d %s %08x\n", __FILE__, __LINE__, __FUNCTION__, this_spi->hw_reg->STATUS); */
/* Read received frame. */
/* Wait for Rx complete. */
rx_ready = this_spi->hw_reg->STATUS & RX_DATA_READY_MASK;
while(!rx_ready)
{
rx_ready = this_spi->hw_reg->STATUS & RX_DATA_READY_MASK;
}
/* printf("%s %d %s\n", __FILE__, __LINE__, __FUNCTION__); */
/* Return Rx data. */
return( this_spi->hw_reg->RX_DATA );
}
/* /\***************************************************************************\//\** */
/* * MSS_SPI_transfer_block() */
/* * See "mss_spi.h" for details of how to use this function. */
/* *\/ */
/* void MSS_SPI_transfer_block */
/* ( */
/* mss_spi_instance_t * this_spi, */
/* const uint8_t * cmd_buffer, */
/* uint16_t cmd_byte_size, */
/* uint8_t * rd_buffer, */
/* uint16_t rd_byte_size */
/* ) */
/* { */
/* uint16_t transfer_idx = 0u; */
/* uint16_t tx_idx; */
/* uint16_t rx_idx; */
/* uint32_t frame_count; */
/* volatile uint32_t rx_raw; */
/* uint16_t transit = 0u; */
/* uint32_t tx_fifo_full; */
/* uint32_t rx_overflow; */
/* uint32_t rx_fifo_empty; */
/* uint16_t transfer_size; /\* Total number of bytes transfered. *\/ */
/* ASSERT((this_spi == &g_mss_spi0) || (this_spi == &g_mss_spi1)); */
/* /\* This function is only intended to be used with an SPI master. *\/ */
/* ASSERT((this_spi->hw_reg->CONTROL & CTRL_MASTER_MASK) == CTRL_MASTER_MASK); */
/* /\* Compute number of bytes to transfer. *\/ */
/* transfer_size = cmd_byte_size + rd_byte_size; */
/* /\* Adjust to 1 byte transfer to cater for DMA transfers. *\/ */
/* if(transfer_size == 0u) */
/* { */
/* frame_count = 1u; */
/* } */
/* else */
/* { */
/* frame_count = transfer_size; */
/* } */
/* /\* Recover from receive overflow. *\/ */
/* rx_overflow = this_spi->hw_reg->STATUS & RX_OVERFLOW_MASK; */
/* if(rx_overflow) */
/* { */
/* recover_from_rx_overflow(this_spi); */
/* } */
/* /\* Set frame size to 8 bits and the frame count to the transfer size. *\/ */
/* this_spi->hw_reg->CONTROL &= ~CTRL_ENABLE_MASK; */
/* this_spi->hw_reg->CONTROL = (this_spi->hw_reg->CONTROL & ~TXRXDFCOUNT_MASK) | ( (frame_count << TXRXDFCOUNT_SHIFT) & TXRXDFCOUNT_MASK); */
/* this_spi->hw_reg->TXRXDF_SIZE = 8u; */
/* this_spi->hw_reg->CONTROL |= CTRL_ENABLE_MASK; */
/* /\* Flush the receive FIFO. *\/ */
/* rx_fifo_empty = this_spi->hw_reg->STATUS & RX_FIFO_EMPTY_MASK; */
/* while(!rx_fifo_empty) */
/* { */
/* rx_raw = this_spi->hw_reg->RX_DATA; */
/* rx_fifo_empty = this_spi->hw_reg->STATUS & RX_FIFO_EMPTY_MASK; */
/* } */
/* tx_idx = 0u; */
/* rx_idx = 0u; */
/* if(tx_idx < cmd_byte_size) */
/* { */
/* this_spi->hw_reg->TX_DATA = cmd_buffer[tx_idx]; */
/* ++tx_idx; */
/* ++transit; */
/* } */
/* else */
/* { */
/* if(tx_idx < transfer_size) */
/* { */
/* this_spi->hw_reg->TX_DATA = 0x00u; */
/* ++tx_idx; */
/* ++transit; */
/* } */
/* } */
/* /\* Perform the remainder of the transfer by sending a byte every time a byte */
/* * has been received. This should ensure that no Rx overflow can happen in */
/* * case of an interrupt occurs during this function. *\/ */
/* while(transfer_idx < transfer_size) */
/* { */
/* rx_fifo_empty = this_spi->hw_reg->STATUS & RX_FIFO_EMPTY_MASK; */
/* if(!rx_fifo_empty) */
/* { */
/* /\* Process received byte. *\/ */
/* rx_raw = this_spi->hw_reg->RX_DATA; */
/* if(transfer_idx >= cmd_byte_size) */
/* { */
/* if(rx_idx < rd_byte_size) */
/* { */
/* rd_buffer[rx_idx] = (uint8_t)rx_raw; */
/* } */
/* ++rx_idx; */
/* } */
/* ++transfer_idx; */
/* --transit; */
/* } */
/* tx_fifo_full = this_spi->hw_reg->STATUS & TX_FIFO_FULL_MASK; */
/* if(!tx_fifo_full) */
/* { */
/* if(transit < RX_FIFO_SIZE) */
/* { */
/* /\* Send another byte. *\/ */
/* if(tx_idx < cmd_byte_size) */
/* { */
/* this_spi->hw_reg->TX_DATA = cmd_buffer[tx_idx]; */
/* ++tx_idx; */
/* ++transit; */
/* } */
/* else */
/* { */
/* if(tx_idx < transfer_size) */
/* { */
/* this_spi->hw_reg->TX_DATA = 0x00u; */
/* ++tx_idx; */
/* ++transit; */
/* } */
/* } */
/* } */
/* } */
/* } */
/* } */
/* /\***************************************************************************\//\** */
/* * MSS_SPI_set_frame_rx_handler() */
/* * See "mss_spi.h" for details of how to use this function. */
/* *\/ */
/* void MSS_SPI_set_frame_rx_handler */
/* ( */
/* mss_spi_instance_t * this_spi, */
/* mss_spi_frame_rx_handler_t rx_handler */
/* ) */
/* { */
/* uint32_t tx_fifo_empty; */
/* ASSERT((this_spi == &g_mss_spi0) || (this_spi == &g_mss_spi1)); */
/* /\* This function is only intended to be used with an SPI slave. *\/ */
/* ASSERT((this_spi->hw_reg->CONTROL & CTRL_MASTER_MASK) != CTRL_MASTER_MASK); */
/* /\* Disable block Rx handler as they are mutually exclusive. *\/ */
/* this_spi->block_rx_handler = 0u; */
/* /\* Keep a copy of the pointer to the rx hnadler function. *\/ */
/* this_spi->frame_rx_handler = rx_handler; */
/* /\* Automatically fill the TX FIFO with zeroes if no slave tx frame set.*\/ */
/* tx_fifo_empty = this_spi->hw_reg->STATUS & TX_FIFO_EMPTY_MASK; */
/* if(tx_fifo_empty) */
/* { */
/* this_spi->hw_reg->COMMAND |= AUTOFILL_MASK; */
/* } */
/* /\* Enable Rx interrupt. *\/ */
/* this_spi->hw_reg->CONTROL |= CTRL_RX_IRQ_EN_MASK; */
/* /\* NVIC_EnableIRQ( this_spi->irqn ); *\/ */
/* } */
/* /\***************************************************************************\//\** */
/* * MSS_SPI_set_slave_tx_frame() */
/* * See "mss_spi.h" for details of how to use this function. */
/* *\/ */
/* void MSS_SPI_set_slave_tx_frame */
/* ( */
/