unt8_t const* const strings[]
{
string1,
string2...
}

lcd_drawLine(x0, y0, x1, y1)

typedef struct
{
uint8_t x;
uint8_t y;
}point_t;
lcd_drawLine(pont_t start_point, pont_t end_point)

typedef enum
{
GPM_INPUT = 0,
GPM_OUTPUT = 1,
GPM_AF = 2,
GPM_ANALOG = 3,
} GPIO_MODE;

typedef enum
{
GPF_AF0 = 0,
GPF_AF1 = 1,
GPF_AF2 = 2,
GPF_AF3 = 3,
GPF_AF4 = 4,
GPF_AF5 = 5,
GPF_AF6 = 6,
GPF_AF7 = 7,
GPF_AF8 = 8,
GPF_AF9 = 9,
GPF_AF10 = 10,
GPF_AF11 = 11,
GPF_AF12 = 12,
GPF_AF13 = 13,
GPF_AF14 = 14,
GPF_AF15 = 15,
} GPIO_AF;

typedef enum
{
GPT_PP = 0,
GPT_OD = 1,
} GPIO_TYPE;

typedef enum
{
SPD_2M = 0,
SPD_25M = 1,
SPD_50M = 2,
SPD_100M = 3,
} GPIO_SPD;

struct pin_mode
{
void *port;
char pin;
GPIO_MODE mode;
GPIO_AF af;
GPIO_TYPE type;
GPIO_SPD speed;
};

void gpio_setup(const struct pin_mode *setup)
{
while(setup->port)
{
GPIO_TypeDef *port = (GPIO_TypeDef *)setup->port;

port->MODER = (port->MODER & ~(3UL << setup->pin * 2)) |
(setup->mode << setup->pin * 2);
if(setup->mode == 2) // Alternate function
{
int p = (setup->pin > 7) ? 1 : 0, n = setup->pin & 7;

port->AFR[p] = (port->AFR[p] & ~(15UL << n * 4)) |
(setup->af << n * 4);
}
if(setup->type)
port->OTYPER |= 1UL << setup->pin;
else
port->OTYPER &= ~(1UL << setup->pin);
port->OSPEEDR = (port->OSPEEDR & ~(3UL << setup->pin * 2)) |
(setup->speed << setup->pin * 2);
setup++;
}
}

const struct pin_mode ui_pins[] =
{
     {LED1, GPM_OUTPUT, GPF_AF0, GPT_PP},
     {LED2, GPM_OUTPUT, GPF_AF0, GPT_PP},

     {KEY, GPM_INPUT},

     NULL
};

gpio_setup(ui_pins);

*
//#########################    
// /* TIM6 is used to  */
//
  NVIC_InitTypeDef            NVIC_InitStructure;
  TIM_TimeBaseInitTypeDef     TIM_TimeBaseStructure;
//
/* TIMER clock enable */
//
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6 , ENABLE);

/* Enable the TIMER global Interrupt */

  NVIC_InitStructure.NVIC_IRQChannel = TIM6_DAC_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
//
  NVIC_Init(&NVIC_InitStructure);
//
  TIM_TimeBaseStructure.TIM_Period = 5000;
  TIM_TimeBaseStructure.TIM_Prescaler = 32;
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
//
  TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure);
//
/* TIM IT enable */
  TIM_ITConfig(TIM6, TIM_IT_Update , ENABLE);
//
/* TIM enable counter */
//
   TIM_Cmd(TIM6, ENABLE);    
//-------

//**************************************************************************//
//  Установка периода SysTick  5 мс  
//==========================================================================//
    SysTick_Config(SystemCoreClock/200);
//
    NVIC_SetPriority(SysTick_IRQn, 2);  // IRQ Priority = 2

//
//
.....................
//
//**************************************************************************//
//  IRQ  SysTickTimer  с периодом 5 мс
//==========================================================================//
void SysTick_Handler(void)
{
//
....trtrtrtrtrtrtrtrtrtrtr....
//
}