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#include <unistd.h>
#include <errno.h>
#include <string.h>
#include "output.h"
#include "jtaglib.h"
#include "sr_global.h"
#include "gpio_helpers.h"
#include "mspdebug_wrapper.h"
#include "con_usart.h"
#include <stm32f407xx.h>
#define BLOCK_SIZE 512 /* bytes */
static void sr_delay_inst(void);
static struct jtdev sr_jtdev;
static struct jtdev sr_jtdev_default;
enum sr_gpio_types {
SR_GPIO_TCK,
SR_GPIO_TMS,
SR_GPIO_TDI,
SR_GPIO_RST,
SR_GPIO_TST,
SR_GPIO_TDO,
SR_NUM_GPIOS
};
struct {
GPIO_TypeDef *gpio;
int pin;
int mode;
} gpios[SR_NUM_GPIOS] = {
[SR_GPIO_TCK] = {GPIOE, 10, 1},
[SR_GPIO_TMS] = {GPIOE, 11, 1},
[SR_GPIO_TDI] = {GPIOE, 12, 1},
[SR_GPIO_RST] = {GPIOE, 9, 1},
[SR_GPIO_TST] = {GPIOE, 14, 1},
[SR_GPIO_TDO] = {GPIOE, 13, 0},
};
void sr_delay_inst() {
for (int i=0; i<10; i++)
asm volatile("nop");
}
void mspd_jtag_init() {
for (int i=0; i<SR_NUM_GPIOS; i++)
gpio_pin_setup(gpios[i].gpio, gpios[i].pin, gpios[i].mode, 3, 0, 0);
}
static void sr_gpio_write(int num, int out) {
if (out)
gpios[num].gpio->BSRR = 1<<gpios[num].pin;
else
gpios[num].gpio->BSRR = 1<<gpios[num].pin<<16;
}
static void sr_jtdev_rst(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_RST, out);
}
int mspd_jtag_flash_and_reset(size_t img_start, size_t img_len, ssize_t (*read_block)(void *usr, int addr, size_t len, uint8_t *out), void *usr)
{
union {
uint8_t bytes[BLOCK_SIZE];
uint16_t words[BLOCK_SIZE/2];
} block;
memcpy(&sr_jtdev, &sr_jtdev_default, sizeof(sr_jtdev));
/* Initialize JTAG connection */
unsigned int jtag_id = jtag_init(&sr_jtdev);
if (sr_jtdev.failed) {
con_printf("Couldn't initialize device\r\n");
return -EPIPE;
}
con_printf("JTAG device ID: 0x%02x\r\n", jtag_id);
if (jtag_id != 0x89 && jtag_id != 0x91)
return -EINVAL;
#if 0
con_printf("Memory dump:\r\n");
for (size_t i=0x1000; i<=0x10ff;) {
con_printf("%04x: ", i);
for (size_t j=0; j<16; i+=1, j+=1) {
con_printf("%02x ", jtag_read_mem(&sr_jtdev, 8, i));
}
con_printf("\r\n");
}
return 0;
#endif
/* Clear flash */
jtag_erase_flash(&sr_jtdev, JTAG_ERASE_MAIN, 0);
if (sr_jtdev.failed)
return -EPIPE;
/* Write flash */
for (size_t p = img_start; p < img_start + img_len; p += BLOCK_SIZE) {
con_printf("Writing block %04zx\r\n", p);
ssize_t nin = read_block(usr, p, BLOCK_SIZE, block.bytes);
if (nin < 0)
return nin;
if (nin & 1) { /* pad unaligned */
block.bytes[nin] = 0;
nin ++;
}
/* Convert to little-endian */
for (ssize_t i=0; i<nin/2; i++)
block.words[i] = htole(block.words[i]);
jtag_write_flash(&sr_jtdev, p, nin/2, block.words);
if (sr_jtdev.failed)
return -EPIPE;
}
/* Verify flash */
/* FIXME
word = jtag_read_mem(NULL, 16, addr+index );
*/
/* Execute power on reset */
jtag_execute_puc(&sr_jtdev);
if (sr_jtdev.failed)
return -EPIPE;
jtag_release_device(&sr_jtdev, 0xfffe);
return 0;
}
/* mspdebug HAL shim */
int printc_err(const char *fmt, ...) {
va_list va;
va_start(va, fmt);
int rc = usart_printf_blocking_va(&con_usart, fmt, va);
if (rc)
return rc;
size_t i;
for (i=0; fmt[i]; i++)
;
if (i > 0 && fmt[i-1] == '\n')
usart_putc_nonblocking(&con_usart, '\r');
return rc;
}
static void sr_jtdev_power_on(struct jtdev *p) {
UNUSED(p);
/* ignore */
}
static void sr_jtdev_connect(struct jtdev *p) {
UNUSED(p);
/* ignore */
}
static void sr_jtdev_tck(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TCK, out);
}
static void sr_jtdev_tms(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TMS, out);
}
static void sr_jtdev_tdi(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TDI, out);
}
static void sr_jtdev_tst(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TST, out);
}
static int sr_jtdev_tdo_get(struct jtdev *p) {
UNUSED(p);
return !!(gpios[SR_GPIO_TDO].gpio->IDR & (1<<gpios[SR_GPIO_TDO].pin));
}
static void sr_jtdev_tclk(struct jtdev *p, int out) {
UNUSED(p);
sr_gpio_write(SR_GPIO_TDI, out);
}
static int sr_jtdev_tclk_get(struct jtdev *p) {
UNUSED(p);
return !!(gpios[SR_GPIO_TDI].gpio->ODR & (1<<gpios[SR_GPIO_TDI].pin));
}
static void sr_jtdev_tclk_strobe(struct jtdev *p, unsigned int count) {
UNUSED(p);
while (count--) {
gpios[SR_GPIO_TDI].gpio->BSRR = 1<<gpios[SR_GPIO_TDI].pin;
sr_delay_inst();
gpios[SR_GPIO_TDI].gpio->BSRR = 1<<gpios[SR_GPIO_TDI].pin<<16;
}
}
static void sr_jtdev_led_green(struct jtdev *p, int out) {
UNUSED(p);
UNUSED(out);
/* ignore */
}
static void sr_jtdev_led_red(struct jtdev *p, int out) {
UNUSED(p);
UNUSED(out);
/* ignore */
}
static struct jtdev_func sr_jtdev_vtable = {
.jtdev_open = NULL,
.jtdev_close = NULL,
.jtdev_power_off = NULL,
.jtdev_release = NULL,
.jtdev_power_on = sr_jtdev_power_on,
.jtdev_connect = sr_jtdev_connect,
.jtdev_tck = sr_jtdev_tck,
.jtdev_tms = sr_jtdev_tms,
.jtdev_tdi = sr_jtdev_tdi,
.jtdev_rst = sr_jtdev_rst,
.jtdev_tst = sr_jtdev_tst,
.jtdev_tdo_get = sr_jtdev_tdo_get,
.jtdev_tclk = sr_jtdev_tclk,
.jtdev_tclk_get = sr_jtdev_tclk_get,
.jtdev_tclk_strobe = sr_jtdev_tclk_strobe,
.jtdev_led_green = sr_jtdev_led_green,
.jtdev_led_red = sr_jtdev_led_red,
};
static struct jtdev sr_jtdev = {
0,
.f = &sr_jtdev_vtable
};
static struct jtdev sr_jtdev_default = {
0,
.f = &sr_jtdev_vtable
};
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