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refactor crc stuff

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This commit is contained in:
david 2009-06-24 14:22:26 +02:00
parent c24d6ceb81
commit 8b10ccc7de
3 changed files with 45 additions and 37 deletions
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35
avr/usbload/crc.c
View File

@ -3,6 +3,8 @@
#include "crc.h"
#include "uart.h"
#include "config.h"
#include "sram.h"
extern FILE uart_stdout;
@ -37,3 +39,36 @@ uint16_t do_crc_update(uint16_t crc, uint8_t * data, uint16_t size)
crc = crc_xmodem_update(crc, data[i]);
return crc;
}
void crc_check_memory(uint32_t top_addr,uint8_t *buffer)
{
uint16_t crc = 0;
uint32_t addr;
uint8_t req_bank = 0;
for (addr = 0x000000; addr < top_addr; addr += BUFFER_SIZE) {
sram_read_buffer(addr, buffer, BUFFER_SIZE);
crc = do_crc_update(crc, buffer, BUFFER_SIZE);
if (addr && addr % 32768 == 0) {
printf("crc_check_memory: req_bank: 0x%02x Addr: 0x%08lx CRC: 0x%04x\n",
req_bank, addr, crc);
req_bank++;
crc = 0;
}
}
}
uint16_t crc_check_memory_range(uint32_t start_addr, uint32_t size,uint8_t *buffer)
{
uint16_t crc = 0;
uint32_t addr;
uint8_t req_bank = 0;
for (addr = start_addr; addr < start_addr + size; addr += BUFFER_SIZE) {
sram_read_buffer(addr, buffer, BUFFER_SIZE);
crc = do_crc_update(crc, buffer, BUFFER_SIZE);
}
#if DEBUG_USB
printf("crc_check_memory_range: Addr: 0x%08lx CRC: 0x%04x\n", addr, crc);
#endif
return crc;
}

2
avr/usbload/crc.h
View File

@ -5,3 +5,5 @@
uint16_t crc_xmodem_update (uint16_t crc, uint8_t data);
uint16_t do_crc(uint8_t * data,uint16_t size);
uint16_t do_crc_update(uint16_t crc,uint8_t * data,uint16_t size);
void crc_check_memory(uint32_t top_addr,uint8_t *buffer);
uint16_t crc_check_memory_range(uint32_t start_addr, uint32_t size,uint8_t *buffer);

45
avr/usbload/main.c
View File

@ -30,40 +30,8 @@ uint16_t sync_errors = 0;
uint8_t tx_buffer[32];
uint8_t data_buffer[4];
uint32_t addr;
uint16_t crc = 0;
void crc_check_memory(uint32_t top_addr)
{
uint16_t crc = 0;
uint32_t addr;
req_bank = 0;
for (addr = 0x000000; addr < top_addr; addr += BUFFER_SIZE) {
sram_read_buffer(addr, read_buffer, BUFFER_SIZE);
crc = do_crc_update(crc, read_buffer, BUFFER_SIZE);
if (addr && addr % 32768 == 0) {
printf("crc_check_memory: req_bank: 0x%x Addr: 0x%lx CRC: %x\n",
req_bank, addr, crc);
req_bank++;
crc = 0;
}
}
}
void crc_check_memory_range(uint32_t start_addr, uint32_t size)
{
uint16_t crc = 0;
uint32_t addr;
req_bank = 0;
for (addr = start_addr; addr < start_addr + size; addr += BUFFER_SIZE) {
sram_read_buffer(addr, read_buffer, BUFFER_SIZE);
crc = do_crc_update(crc, read_buffer, BUFFER_SIZE);
}
tx_buffer[0] = crc & 0xff;
tx_buffer[1] = (crc >> 8) & 0xff;
#if DEBUG_USB
printf("crc_check_memory_range: Addr: 0x%lx CRC: %x\n", addr, crc);
#endif
}
usbMsgLen_t usbFunctionSetup(uchar data[8])
@ -95,7 +63,7 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
ret_len = 0;
}
rx_remaining = rq->wLength.word;
ret_len = 0xff;
ret_len = USB_MAX_TRANS;
if (req_addr && req_addr % req_bank_size == 0) {
#if DEBUG_USB
printf("USB_UPLOAD_ADDR: req_bank: 0x%x Addr: 0x%08lx \n",
@ -103,7 +71,7 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
req_bank, req_addr);
req_bank++;
}
ret_len = 0xff;
ret_len = USB_MAX_TRANS;
} else if (rq->bRequest == USB_DOWNLOAD_INIT) {
#if DEBUG_USB
printf("USB_DOWNLOAD_INIT\n");
@ -118,7 +86,7 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
printf("USB_CRC: Addr 0x%lx \n", req_addr);
#endif
cli();
crc_check_memory(req_addr);
crc_check_memory(req_addr,read_buffer);
sei();
} else if (rq->bRequest == USB_CRC_ADDR) {
req_addr = rq->wValue.word;
@ -135,7 +103,10 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
printf("USB_CRC_ADDR: Addr: 0x%lx Size: %li\n", req_addr, req_size);
#endif
cli();
crc_check_memory_range(req_addr,req_size);
crc = crc_check_memory_range(req_addr,req_size,read_buffer);
tx_buffer[0] = crc & 0xff;
tx_buffer[1] = (crc >> 8) & 0xff;
sei();
ret_len = 2;
}