forked from vdudouyt/stm8flash
/
stlinkv2.c
285 lines (243 loc) · 8.76 KB
/
stlinkv2.c
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/* stlink-v2 specific functions
(c) Valentin Dudouyt, 2012-2013 */
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include "stlink.h"
#include "error.h"
#include "try.h"
#include "byte_utils.h"
#include "stlinkv2.h"
unsigned char *pack_int16(uint16_t word, unsigned char *out);
#define STLK_READ_BUFFER_SIZE 6144
unsigned char cmd_buf[16];
unsigned int stlink2_get_status(programmer_t *pgm);
int stlink2_write_byte(programmer_t *pgm, unsigned char byte, unsigned int start);
int stlink2_write_and_read_byte(programmer_t *pgm, unsigned char byte, unsigned int start);
static unsigned int msg_transfer(programmer_t *pgm, unsigned char *buf, unsigned int length, int direction) {
int bytes_transferred;
int ep = (direction == LIBUSB_ENDPOINT_OUT) ? 2 : 1;
libusb_bulk_transfer(pgm->dev_handle, ep | direction, buf, length, &bytes_transferred, 0);
if(bytes_transferred != length) ERROR2("IO error: expected %d bytes but %d bytes transferred\n", length, bytes_transferred);
return bytes_transferred;
}
static unsigned int msg_send(programmer_t *pgm, unsigned char *buf, unsigned int length) {
return msg_transfer(pgm, buf, length, LIBUSB_ENDPOINT_OUT);
}
static unsigned int msg_recv(programmer_t *pgm, unsigned char *buf, unsigned int length) {
return msg_transfer(pgm, buf, length, LIBUSB_ENDPOINT_IN);
}
static void msg_recv0(programmer_t *pgm, unsigned int length) {
unsigned char buf[64];
msg_recv(pgm, buf, length);
}
static unsigned int msg_recv_int(programmer_t *pgm, unsigned int length) {
unsigned char buf[4];
msg_recv(pgm, buf, length);
return load_int(buf, length, MP_LITTLE_ENDIAN);
}
static unsigned int msg_recv_int8(programmer_t *pgm) { return msg_recv_int(pgm, 1); }
static unsigned int msg_recv_int16(programmer_t *pgm) { return msg_recv_int(pgm, 2); }
static unsigned int msg_recv_int32(programmer_t *pgm) { return msg_recv_int(pgm, 4); }
static void msg_init(unsigned char *out, unsigned int cmd) {
memset(out, 0, 16);
format_int(out, cmd, 2, MP_BIG_ENDIAN);
}
static void stlink2_cmd(programmer_t *pgm, unsigned int cmd, unsigned int length, ...) {
va_list ap;
int i;
// Preparing
msg_init(cmd_buf, cmd);
va_start(ap, length);
for(i = 0; i < length; i++) {
cmd_buf[i + 2] = va_arg(ap, int);
}
va_end(ap);
// Triggering USB transfer
msg_send(pgm, cmd_buf, sizeof(cmd_buf));
}
bool stlink2_open(programmer_t *pgm) {
stlink2_cmd(pgm, 0xf500, 0);
switch(msg_recv_int16(pgm)) {
case 0x0100:
case 0x0001:
// Run initializing sequence
stlink2_cmd(pgm, 0xf307, 0); // Start initializing sequence
stlink2_cmd(pgm, 0xf400, 0); // Turns the lights on
case 0x0003:
stlink2_cmd(pgm, 0xf40d, 0);
msg_recv_int16(pgm);
stlink2_cmd(pgm, 0xf402, 1, 0x01);
msg_recv0(pgm, 8);
break;
}
return(true);
}
void stlink2_srst(programmer_t *pgm) {
stlink2_cmd(pgm, 0xf407, 2, 0x00, 0x01);
stlink2_get_status(pgm);
stlink2_cmd(pgm, 0xf408, 2, 0x00, 0x01);
stlink2_get_status(pgm);
}
void stlink2_init_session(programmer_t *pgm) {
int i;
char f4_cmd_arg1[] = { 0x07,
0x07,
0x08,
0x07,
0x04,
0x03,
0x05,
};
for(i = 0; i < sizeof(f4_cmd_arg1); i++) {
stlink2_cmd(pgm, 0xf400 | f4_cmd_arg1[i], 0);
TRY(8, stlink2_get_status(pgm) == 0);
}
stlink2_write_byte(pgm, 0xa0, 0x7f80); // mov 0x0a, SWIM_CSR2 ;; Init SWIM
stlink2_cmd(pgm, 0xf408, 0);
TRY(8, stlink2_get_status(pgm) == 0);
stlink2_write_and_read_byte(pgm, 0xa0, 0x7f99);
stlink2_cmd(pgm, 0xf40c, 0);
msg_recv_int8(pgm); // 0x08 (or 0x0a if used stlink2_write_byte() instead)
}
void stlink2_finish_session(programmer_t *pgm) {
stlink2_cmd(pgm, 0xf405, 0);
stlink2_get_status(pgm);
stlink2_cmd(pgm, 0xf407, 0);
stlink2_get_status(pgm);
stlink2_cmd(pgm, 0xf403, 0);
stlink2_get_status(pgm);
}
int stlink2_write_byte(programmer_t *pgm, unsigned char byte, unsigned int start) {
unsigned char buf[4], start2[2];
pack_int16(start, start2);
stlink2_cmd(pgm, 0xf40a, 7,
0x00, 0x01,
0x00, 0x00,
HI(start), LO(start),
byte);
usleep(2000);
return(stlink2_get_status(pgm)); // Should be '1'
}
int stlink2_write_word(programmer_t *pgm, unsigned int word, unsigned int start) {
unsigned char buf[4], start2[2];
pack_int16(start, start2);
stlink2_cmd(pgm, 0xf40a, 8,
0x00, 0x02,
0x00, 0x00,
HI(start), LO(start),
HI(word), LO(word));
usleep(2000);
return(stlink2_get_status(pgm)); // Should be '1'
}
int stlink2_write_and_read_byte(programmer_t *pgm, unsigned char byte, unsigned int start) {
unsigned char buf[4], start2[2];
pack_int16(start, start2);
stlink2_cmd(pgm, 0xf40b, 7,
0x00, 0x01,
0x00, 0x00,
HI(start), LO(start),
byte);
usleep(2000);
stlink2_get_status(pgm);
stlink2_cmd(pgm, 0xf40c, 0);
return(msg_recv_int8(pgm));
}
unsigned int stlink2_get_status(programmer_t *pgm) {
stlink2_cmd(pgm, 0xf409, 0);
return msg_recv_int32(pgm);
}
int stlink2_swim_read_range(programmer_t *pgm, stm8_device_t *device, unsigned char *buffer, unsigned int start, unsigned int length) {
stlink2_init_session(pgm);
int i;
for(i = 0; i < length; i += STLK_READ_BUFFER_SIZE) {
// Determining current block start & size (relative to 0x8000)
int block_start = start + i;
int block_size = length - i;
if(block_size > STLK_READ_BUFFER_SIZE) {
block_size = STLK_READ_BUFFER_SIZE;
}
// Sending USB packet
stlink2_cmd(pgm, 0xf40b, 6,
HI(block_size), LO(block_size),
0x00, 0x00,
HI(block_start), LO(block_start));
TRY(128, (stlink2_get_status(pgm) & 0xffff) == 0);
// Seems like we've got some bytes from stlink, downloading them
stlink2_cmd(pgm, 0xf40c, 0);
msg_recv(pgm, &(buffer[i]), block_size);
}
return(length);
}
void stlink2_wait_until_transfer_completes(programmer_t *pgm, stm8_device_t *device) {
TRY(8, stlink2_write_and_read_byte(pgm, 0x82, device->regs.FLASH_IAPSR) & 0x4);
}
int stlink2_swim_write_range(programmer_t *pgm, stm8_device_t *device, unsigned char *buffer, unsigned int start, unsigned int length, const memtype_t memtype) {
stlink2_init_session(pgm);
stlink2_write_byte(pgm, 0x00, device->regs.CLK_CKDIVR);
if(memtype == FLASH || memtype == EEPROM || memtype == OPT) {
stlink2_write_and_read_byte(pgm, 0x00, device->regs.FLASH_IAPSR);
}
// Unlock MASS
if(memtype == FLASH) {
stlink2_write_byte(pgm, 0x56, device->regs.FLASH_PUKR);
stlink2_write_byte(pgm, 0xae, device->regs.FLASH_PUKR);
}
if(memtype == EEPROM || memtype == OPT) {
stlink2_write_byte(pgm, 0xae, device->regs.FLASH_DUKR);
stlink2_write_byte(pgm, 0x56, device->regs.FLASH_DUKR);
}
if(memtype == FLASH || memtype == EEPROM || memtype == OPT) {
stlink2_write_and_read_byte(pgm, 0x56, device->regs.FLASH_IAPSR); // mov 0x56, FLASH_IAPSR
}
int i;
int BLOCK_SIZE = device->flash_block_size;
for(i = 0; i < length; i+=BLOCK_SIZE) {
if(memtype == FLASH || memtype == EEPROM) {
// block programming mode
stlink2_write_byte(pgm, 0x01, device->regs.FLASH_CR2); // mov 0x01fe, FLASH_CR2; 0x817e - enable write OPT bytes
if(device->regs.FLASH_NCR2 != 0) { // Device have FLASH_NCR2 register
stlink2_write_byte(pgm, 0xFE, device->regs.FLASH_NCR2);
}
} else if (memtype == OPT){
// option programming mode
stlink2_write_byte(pgm, 0x80, device->regs.FLASH_CR2);
if(device->regs.FLASH_NCR2 != 0) {
stlink2_write_byte(pgm, 0x7F, device->regs.FLASH_NCR2);
}
}
if(memtype == OPT){
int j;
for(j = 0; j < length; j++){
stlink2_write_byte(pgm, buffer[j], start+j);
TRY(8, HI(stlink2_get_status(pgm)) == 1);
}
} else {
// page-based writing
// The first 8 packet bytes are getting transmitted
// with the same USB bulk transfer as the command itself
msg_init(cmd_buf, 0xf40a);
format_int(&(cmd_buf[2]), BLOCK_SIZE, 2, MP_BIG_ENDIAN);
format_int(&(cmd_buf[6]), start + i, 2, MP_BIG_ENDIAN);
memcpy(&(cmd_buf[8]), &(buffer[i]), 8);
msg_send(pgm, cmd_buf, sizeof(cmd_buf));
// Transmitting the rest
msg_send(pgm, &(buffer[i + 8]), BLOCK_SIZE - 8);
// Waiting for the transfer to process
TRY(128, HI(stlink2_get_status(pgm)) == BLOCK_SIZE);
}
if(memtype == FLASH || memtype == EEPROM || memtype == OPT) {
stlink2_wait_until_transfer_completes(pgm, device);
}
}
if(memtype == FLASH || memtype == EEPROM || memtype == OPT) {
stlink2_write_and_read_byte(pgm, 0x56, device->regs.FLASH_IAPSR); // mov 0x56, FLASH_IAPSR
}
stlink2_write_byte(pgm, 0x00, 0x7f80);
stlink2_write_byte(pgm, 0xb6, 0x7f80);
stlink2_finish_session(pgm);
return(length);
}