We are planing to develope our 2-stage bootloader
the function feature is following :
1. the Fx3BootAppGcc check whether there are one valid app img on the I2C EEPROM(assumed the app img locate at eeprom address 0x8000)
2. if the app img is Ok,2-stage bootloader will boot the app img
3. if the app img been damaged, the 2-stage bootloader download new app img by usb and write to eeprom.
So I 'm reviewing the following code usb_boot.c in the Fx3BootAppGcc to try to how to get the img data by usb ep0.
My question is : the Fx3BootAppGcc only support download the img data to ITCM Memory region(CY_FX3_BOOT_ITCM_BASE to CY_FX3_BOOT_ITCM_END)?
Also, Are there one windows tools that can be used with this example(Fx3BootAppGcc) to download the app img ?
if ((address + gEP0.wLen) <= CY_FX3_BOOT_ITCM_END)
{
/* Avoid writing to the interrupt table. */
if (address < 0xFF) {
gEP0.pData += 0xFF-address;
gEP0.wLen -= 0xFF-address;
address = 0xFF;
}
CyFx3BootMemCopy((uint8_t *)address, gEP0.pData, gEP0.wLen);
}
void
myVendorCmdHandler (
void
)
{
....
else if (stage == eDataOut)
{
status = CyFx3BootUsbDmaXferData (0x00, (uint32_t)gEP0.pData, gEP0.wLen, CY_FX3_BOOT_WAIT_FOREVER);
if (status != CY_FX3_BOOT_SUCCESS)
{
/* USB DMA Transfer failed. Stall the Endpoint. */
CyFx3BootUsbStall (0, CyTrue, CyFalse);
return;
}
/* Validate ITCM Memory */
if ((address + gEP0.wLen) <= CY_FX3_BOOT_ITCM_END)
{
/* Avoid writing to the interrupt table. */
if (address < 0xFF) {
gEP0.pData += 0xFF-address;
gEP0.wLen -= 0xFF-address;
address = 0xFF;
}
CyFx3BootMemCopy((uint8_t *)address, gEP0.pData, gEP0.wLen);
}
}
....
}
