osd-contiki/platform/stm32nucleo-spirit1/spirit1-arch.c

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2015-10-09 19:40:39 +02:00
/*
* Copyright (c) 2012, STMicroelectronics.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
*/
/*---------------------------------------------------------------------------*/
#include "stm32l1xx.h"
#include "spirit1-arch.h"
#include "spirit1.h"
#include "st-lib.h"
/*---------------------------------------------------------------------------*/
extern void spirit1_interrupt_callback(void);
st_lib_spirit_bool spiritdk_timer_expired = S_FALSE;
/*---------------------------------------------------------------------------*/
/* use the SPI-port to acquire the status bytes from the radio. */
#define CS_TO_SCLK_DELAY 0x0100
/*---------------------------------------------------------------------------*/
extern st_lib_spi_handle_typedef st_lib_p_spi_handle;
/*---------------------------------------------------------------------------*/
uint16_t
spirit1_arch_refresh_status(void)
{
volatile uint16_t mcstate = 0x0000;
uint8_t header[2];
header[0] = 0x01;
header[1] = MC_STATE1_BASE;
uint32_t spi_timeout = ((uint32_t)1000); /*<! Value of Timeout when SPI communication fails */
IRQ_DISABLE();
/* Puts the SPI chip select low to start the transaction */
st_lib_radio_spi_cs_low();
for(volatile uint16_t index = 0; index < CS_TO_SCLK_DELAY; index++) {
}
/* Write the aHeader bytes and read the SPIRIT1 status bytes */
st_lib_hal_spi_transmit_receive(&st_lib_p_spi_handle, (uint8_t *)&header[0], (uint8_t *)&mcstate, 1, spi_timeout);
mcstate = mcstate << 8;
/* Write the aHeader bytes and read the SPIRIT1 status bytes */
st_lib_hal_spi_transmit_receive(&st_lib_p_spi_handle, (uint8_t *)&header[1], (uint8_t *)&mcstate, 1, spi_timeout);
/* To be sure to don't rise the Chip Select before the end of last sending */
while(st_lib_hal_spi_get_flag(&st_lib_p_spi_handle, SPI_FLAG_TXE) == RESET) ;
/* Puts the SPI chip select high to end the transaction */
st_lib_radio_spi_cs_high();
IRQ_ENABLE();
return mcstate;
}