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LibrePilot/flight/Bootloaders/AHRS/ahrs_spi_program_master.c
stac 3fda65c5d3 hwinit: Convert SPI drivers to dynamic init
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@2772 ebee16cc-31ac-478f-84a7-5cbb03baadba
2011-02-12 22:19:50 +00:00

138 lines
4.0 KiB
C

/**
******************************************************************************
*
* @file ahrs_spi_program_master.c
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
* @brief AHRS programming over SPI link - master(OpenPilot) end.
*
* @see The GNU Public License (GPL) Version 3
*
*****************************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "openpilot.h"
#include "ahrs_spi_program_master.h"
#include "ahrs_spi_program.h"
#include "pios_spi.h"
PROGERR TransferPacket(uint32_t spi_id, AhrsProgramPacket *txBuf, AhrsProgramPacket *rxBuf);
#define MAX_CONNECT_TRIES 500 //half a second
bool AhrsProgramConnect(uint32_t spi_id)
{
AhrsProgramPacket rxBuf;
AhrsProgramPacket txBuf;
memset(&rxBuf, 0, sizeof(AhrsProgramPacket));
memcpy(&txBuf,SPI_PROGRAM_REQUEST,SPI_PROGRAM_REQUEST_LENGTH);
for(int ct = 0; ct < MAX_CONNECT_TRIES; ct++) {
PIOS_SPI_RC_PinSet(spi_id, 0);
uint32_t res = PIOS_SPI_TransferBlock(spi_id, (uint8_t *) &txBuf,
(uint8_t *) & rxBuf, SPI_PROGRAM_REQUEST_LENGTH +1, NULL);
PIOS_SPI_RC_PinSet(spi_id, 1);
if(res == 0 && memcmp(&rxBuf, SPI_PROGRAM_ACK, SPI_PROGRAM_REQUEST_LENGTH) == 0) {
return (true);
}
vTaskDelay(1 / portTICK_RATE_MS);
}
return (false);
}
PROGERR AhrsProgramWrite(uint32_t spi_id, uint32_t address, void * data, uint32_t size)
{
AhrsProgramPacket rxBuf;
AhrsProgramPacket txBuf;
memset(&rxBuf, 0, sizeof(AhrsProgramPacket));
memcpy(txBuf.data,data,size);
txBuf.size = size;
txBuf.type = PROGRAM_WRITE;
txBuf.address = address;
PROGERR ret = TransferPacket(spi_id, &txBuf, &rxBuf);
if(ret != PROGRAM_ERR_OK) {
return(ret);
}
return(PROGRAM_ERR_OK);
}
PROGERR AhrsProgramRead(uint32_t spi_id, uint32_t address, void * data, uint32_t size)
{
AhrsProgramPacket rxBuf;
AhrsProgramPacket txBuf;
memset(&rxBuf, 0, sizeof(AhrsProgramPacket));
txBuf.size = size;
txBuf.type = PROGRAM_READ;
txBuf.address = address;
PROGERR ret = TransferPacket(spi_id, &txBuf, &rxBuf);
if(ret != PROGRAM_ERR_OK) {
return(ret);
}
memcpy(data, rxBuf.data, size);
return(PROGRAM_ERR_OK);
}
PROGERR AhrsProgramReboot(uint32_t spi_id)
{
AhrsProgramPacket rxBuf;
AhrsProgramPacket txBuf;
memset(&rxBuf, 0, sizeof(AhrsProgramPacket));
txBuf.type = PROGRAM_REBOOT;
memcpy(txBuf.data,REBOOT_CONFIRMATION,REBOOT_CONFIRMATION_LENGTH);
PROGERR ret = TransferPacket(spi_id, &txBuf, &rxBuf);
//If AHRS has rebooted we will get comms errors
if(ret == PROGRAM_ERR_LINK) {
return(PROGRAM_ERR_OK);
}
return(PROGRAM_ERR_FUNCTION);
}
PROGERR TransferPacket(uint32_t spi_id, AhrsProgramPacket *txBuf, AhrsProgramPacket *rxBuf)
{
static uint32_t pktId = 0;
pktId++;
txBuf->packetId = pktId;
txBuf->crc = GenerateCRC(txBuf);
int ct = 0;
for(; ct < MAX_CONNECT_TRIES; ct++) {
PIOS_SPI_RC_PinSet(spi_id, 0);
uint32_t res = PIOS_SPI_TransferBlock(spi_id, (uint8_t *) txBuf,
(uint8_t *) rxBuf, sizeof(AhrsProgramPacket), NULL);
PIOS_SPI_RC_PinSet(spi_id, 1);
if(res == 0) {
if(rxBuf->type != PROGRAM_NULL &&
rxBuf->crc == GenerateCRC(rxBuf) &&
rxBuf->packetId == pktId) {
break;
}
}
vTaskDelay(1 / portTICK_RATE_MS);
}
if(ct == MAX_CONNECT_TRIES) {
return (PROGRAM_ERR_LINK);
}
if(rxBuf->type != PROGRAM_ACK) {
return(PROGRAM_ERR_FUNCTION);
}
return(PROGRAM_ERR_OK);
}