/* *****************************************************************************************
* DESCRIPTION: Process commands I2C commands that are not processed in the interrupt.
* - Slow porcessing commands will be processed here so that the interrupt will not block communications
******************************************************************************************/
void I2C_process_task( void)
{
//PROCESS I2C PENDING TASK - CURRENTLY ONLY ONE AT A TIME - NO STACK NEEDED AT THIS POINT
switch( i2c_task)
{
case I2C_TASK_LPC_MODE:
//set pins to default lpc mode
InitGPIO_LPC_Mode();
LED0_TOGGLE;
i2c_cmd_rx = 0; //done processing the command
break;
case I2C_TASK_PASSIVE_MODE: //received command from i2c go into passive mode
//set pins to default lpc mode
InitGPIO_Passive_Mode();
LED1_TOGGLE;
i2c_cmd_rx = 0; //done processing the command
break;
case I2C_TASK_LPC_CFG: //received command from i2c to reconfigure
InitGPIO_LPC_Mode(); //make sure we are not setup for passive
FPGA_Config("config.bit");
i2c_cmd_rx = 0; //done processing the command
break;
case I2C_TASK_SLAVE_CFG_INIT: //received command from i2c to reconfigure
i2c_slave_cfg_init_status = -1; //reset the return status
i2c_slave_cfg_init_status = InitFPGA_Config();
CFG_MUX_MASTER_CTL; //set the mux control pin for master peripheral control to config lines
i2c_cmd_rx = 0; //done processing the command
break;
default:
i2c_cmd_rx = 0; //don't know why we are here, bail.
break;
}//switch
}//function
void mboot(void)
{
U32 i;
U32 ByteToRead;
U32 ByteRead;
FRESULT res;
DIR dirs;
FATFS fs;
FIL FileObject;
memset(&fs, 0, sizeof(FATFS));
for(i=ZPARAMADDR; i < ZRELADDR; i++) *((volatile S8 *)(i)) = 0;
res = f_mount(0, &fs);
if( res != FR_OK )
{
TRACE_ERR("Mount OS SD card failed: 0x%X", res);
return;
}
res = f_opendir(&dirs, STR_ROOT_DIRECTORY);
if(res == FR_OK )
{
scan_files(STR_ROOT_DIRECTORY);
TRACE_MSG("Load FPGA code (grid.bin) to buffer.");
res = f_open(&FileObject, gridName, FA_OPEN_EXISTING|FA_READ);
if(res != FR_OK)
{
TRACE_ERR("Open grid.rbf file failed: 0x%X", res);
return;
}
ByteToRead = FileObject.fsize;
gridFileSize = FileObject.fsize;
res = f_read(&FileObject, (void*)GRIDADDR, ByteToRead, &ByteRead);
if(res != FR_OK)
{
TRACE_ERR("Load grid.rbf file failed: 0x%X", res);
return;
}
else
{
TRACE_FIN("FPGA code file load OK.");
FPGA_Config();
}
TRACE_MSG("Load kernel command line.");
res = f_open(&FileObject, kcmdName, FA_OPEN_EXISTING|FA_READ);
if(res != FR_OK)
{
TRACE_ERR("Open kernel command line file failed: 0x%X", res);
return;
}
ByteToRead = FileObject.fsize;
kcmdFileSize = FileObject.fsize;
res = f_read(&FileObject, (void*)(ZPARAMADDR + 4*11), ByteToRead, &ByteRead);
if(res != FR_OK)
{
TRACE_ERR("Load kernel command line file failed: 0x%X", res);
return;
}
TRACE_MSG("Load zImage to ZRELADDR: 0x%X.", ZRELADDR);
res = f_open(&FileObject, zImageName, FA_OPEN_EXISTING|FA_READ);
if(res != FR_OK)
{
TRACE_ERR("Open zImage file failed: 0x%X", res);
return;
}
ByteToRead = FileObject.fsize;
res = f_read(&FileObject, (void*)(ZRELADDR), ByteToRead, &ByteRead);
if(res != FR_OK)
{
TRACE_ERR("Load zImage file failed: 0x%X", res);
return;
}
else
{
TRACE_FIN("zImage file Load OK, now let's just enjoy Linux :)\n\r");
BTNDIS_N();
Boot_Linux();
}
}
}
