/* 
 * File:   test_main.c
 * 
 * main() ripped out of old stlink-hw.c
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "stlink-common.h"
#include "uglylogging.h"

#define LOG_TAG __FILE__
#define DLOG(format, args...)         ugly_log(UDEBUG, LOG_TAG, format, ## args)
#define ILOG(format, args...)         ugly_log(UINFO, LOG_TAG, format, ## args)
#define WLOG(format, args...)         ugly_log(UWARN, LOG_TAG, format, ## args)
#define fatal(format, args...)        ugly_log(UFATAL, LOG_TAG, format, ## args)

static void __attribute__((unused)) mark_buf(stlink_t *sl) {
    memset(sl->q_buf, 0, sizeof(sl->q_buf));
    sl->q_buf[0] = 0xaa;
    sl->q_buf[1] = 0xbb;
    sl->q_buf[2] = 0xcc;
    sl->q_buf[3] = 0xdd;
    sl->q_buf[4] = 0x11;
    sl->q_buf[15] = 0x22;
    sl->q_buf[16] = 0x33;
    sl->q_buf[63] = 0x44;
    sl->q_buf[64] = 0x69;
    sl->q_buf[1024 * 6 - 1] = 0x42; //6kB
    sl->q_buf[1024 * 8 - 1] = 0x42; //8kB
}


int main(int argc, char *argv[]) {
	/* Avoid unused parameter warning */
	(void)argv;
	// set scpi lib debug level: 0 for no debug info, 10 for lots

	switch (argc) {
	case 1:
		fputs(
			"\nUsage: stlink-access-test [anything at all] ...\n"
				"\n*** Notice: The stlink firmware violates the USB standard.\n"
				"*** Because we just use libusb, we can just tell the kernel's\n"
				"*** driver to simply ignore the device...\n"
				"*** Unplug the stlink and execute once as root:\n"
				"modprobe -r usb-storage && modprobe usb-storage quirks=483:3744:i\n\n",
			stderr);
		return EXIT_FAILURE;
	default:
        break;
	}

	stlink_t *sl = stlink_v1_open(99, 1);
	if (sl == NULL)
		return EXIT_FAILURE;
    
	// we are in mass mode, go to swd
	stlink_enter_swd_mode(sl);
	stlink_current_mode(sl);
	stlink_core_id(sl);
	//----------------------------------------------------------------------

	stlink_status(sl);
	//stlink_force_debug(sl);
	stlink_reset(sl);
	stlink_status(sl);
	// core system control block
	stlink_read_mem32(sl, 0xe000ed00, 4);
	DLOG("cpu id base register: SCB_CPUID = got 0x%08x expect 0x411fc231\n", read_uint32(sl->q_buf, 0));
	// no MPU
	stlink_read_mem32(sl, 0xe000ed90, 4);
	DLOG("mpu type register: MPU_TYPER = got 0x%08x expect 0x0\n", read_uint32(sl->q_buf, 0));

#if 0
	stlink_read_mem32(sl, 0xe000edf0, 4);
	DD(sl, "DHCSR = 0x%08x", read_uint32(sl->q_buf, 0));

	stlink_read_mem32(sl, 0x4001100c, 4);
	DD(sl, "GPIOC_ODR = 0x%08x", read_uint32(sl->q_buf, 0));
#endif
#if 0
	// happy new year 2011: let blink all the leds
	// see "RM0041 Reference manual - STM32F100xx advanced ARM-based 32-bit MCUs"

#define GPIOC		0x40011000 // port C
#define GPIOC_CRH	(GPIOC + 0x04) // port configuration register high
#define GPIOC_ODR	(GPIOC + 0x0c) // port output data register
#define LED_BLUE	(1<<8) // pin 8
#define LED_GREEN	(1<<9) // pin 9
	stlink_read_mem32(sl, GPIOC_CRH, 4);
	uint32_t io_conf = read_uint32(sl->q_buf, 0);
	DLOG("GPIOC_CRH = 0x%08x\n", io_conf);

	// set: general purpose output push-pull, output mode, max speed 10 MHz.
	write_uint32(sl->q_buf, 0x44444411);
	stlink_write_mem32(sl, GPIOC_CRH, 4);

	memset(sl->q_buf, 0, sizeof(sl->q_buf));
	for (int i = 0; i < 100; i++) {
		write_uint32(sl->q_buf, LED_BLUE | LED_GREEN);
		stlink_write_mem32(sl, GPIOC_ODR, 4);
		/* stlink_read_mem32(sl, 0x4001100c, 4); */
		/* DD(sl, "GPIOC_ODR = 0x%08x", read_uint32(sl->q_buf, 0)); */
		usleep(100 * 1000);

		memset(sl->q_buf, 0, sizeof(sl->q_buf));
		stlink_write_mem32(sl, GPIOC_ODR, 4); // PC lo
        usleep(100 * 1000);
	}
	write_uint32(sl->q_buf, io_conf); // set old state

#endif
#if 0
	// TODO rtfm: stlink doesn't have flash write routines
	// writing to the flash area confuses the fw for the next read access

	//stlink_read_mem32(sl, 0, 1024*6);
	// flash 0x08000000 128kB
	fputs("++++++++++ read a flash at 0x0800 0000\n", stderr);
	stlink_read_mem32(sl, 0x08000000, 1024 * 6); //max 6kB
	clear_buf(sl);
	stlink_read_mem32(sl, 0x08000c00, 5);
	stlink_read_mem32(sl, 0x08000c00, 4);
	mark_buf(sl);
	stlink_write_mem32(sl, 0x08000c00, 4);
	stlink_read_mem32(sl, 0x08000c00, 256);
	stlink_read_mem32(sl, 0x08000c00, 256);
#endif
#if 0
	// sram 0x20000000 8kB
	fputs("\n++++++++++ read/write 8bit, sram at 0x2000 0000 ++++++++++++++++\n\n", stderr);
    memset(sl->q_buf, 0, sizeof(sl->q_buf));
    mark_buf(sl);
	//stlink_write_mem8(sl, 0x20000000, 16);

	//stlink_write_mem8(sl, 0x20000000, 1);
	//stlink_write_mem8(sl, 0x20000001, 1);
	stlink_write_mem8(sl, 0x2000000b, 3);
	stlink_read_mem32(sl, 0x20000000, 16);
#endif
#if 0
	// a not aligned mem32 access doesn't work indeed
	fputs("\n++++++++++ read/write 32bit, sram at 0x2000 0000 ++++++++++++++++\n\n", stderr);
    memset(sl->q_buf, 0, sizeof(sl->q_buf));
	mark_buf(sl);
	stlink_write_mem32(sl, 0x20000000, 1);
	stlink_read_mem32(sl, 0x20000000, 16);
	mark_buf(sl);
	stlink_write_mem32(sl, 0x20000001, 1);
	stlink_read_mem32(sl, 0x20000000, 16);
	mark_buf(sl);
	stlink_write_mem32(sl, 0x2000000b, 3);
	stlink_read_mem32(sl, 0x20000000, 16);

	mark_buf(sl);
	stlink_write_mem32(sl, 0x20000000, 17);
	stlink_read_mem32(sl, 0x20000000, 32);
#endif
#if 0
	// sram 0x20000000 8kB
	fputs("++++++++++ read/write 32bit, sram at 0x2000 0000 ++++++++++++\n", stderr);
    memset(sl->q_buf, 0, sizeof(sl->q_buf));
	mark_buf(sl);
	stlink_write_mem8(sl, 0x20000000, 64);
	stlink_read_mem32(sl, 0x20000000, 64);

	mark_buf(sl);
	stlink_write_mem32(sl, 0x20000000, 1024 * 8); //8kB
	stlink_read_mem32(sl, 0x20000000, 1024 * 6);
	stlink_read_mem32(sl, 0x20000000 + 1024 * 6, 1024 * 2);
#endif
#if 1
    reg regs;
	stlink_read_all_regs(sl, &regs);
	stlink_step(sl);
	fputs("++++++++++ write r0 = 0x12345678\n", stderr);
	stlink_write_reg(sl, 0x12345678, 0);
	stlink_read_reg(sl, 0, &regs);
	stlink_read_all_regs(sl, &regs);
#endif
#if 0
	stlink_run(sl);
	stlink_status(sl);

	stlink_force_debug(sl);
	stlink_status(sl);
#endif
#if 0 /* read the system bootloader */
	fputs("\n++++++++++ reading bootloader ++++++++++++++++\n\n", stderr);
	stlink_fread(sl, "/tmp/barfoo", sl->sys_base, sl->sys_size);
#endif
#if 0 /* read the flash memory */
	fputs("\n+++++++ read flash memory\n\n", stderr);
	/* mark_buf(sl); */
	stlink_read_mem32(sl, 0x08000000, 4);
#endif
#if 0 /* flash programming */
	fputs("\n+++++++ program flash memory\n\n", stderr);
	stlink_fwrite_flash(sl, "/tmp/foobar", 0x08000000);
#endif
#if 0 /* check file contents */
	fputs("\n+++++++ check flash memory\n\n", stderr);
	{
	  const int res = stlink_fcheck_flash(sl, "/tmp/foobar", 0x08000000);
	  printf("_____ stlink_fcheck_flash() == %d\n", res);
	}
#endif
#if 0
	fputs("\n+++++++ sram write and execute\n\n", stderr);
	stlink_fwrite_sram(sl, "/tmp/foobar", sl->sram_base);
	stlink_run_at(sl, sl->sram_base);
#endif

#if 0
	stlink_run(sl);
	stlink_status(sl);
	//----------------------------------------------------------------------
	// back to mass mode, just in case ...
	stlink_exit_debug_mode(sl);
	stlink_current_mode(sl);
	stlink_close(sl);
#endif

	//fflush(stderr); fflush(stdout);
	return EXIT_SUCCESS;
}
