int main(void) {
uint16_t values[2] = {0, 0};
/* Init system clock for maximum system speed */
TM_RCC_InitSystem();
/* Init HAL layer */
HAL_Init();
/* Init leds */
TM_DISCO_LedInit();
/* Init button */
TM_DISCO_ButtonInit();
/* Init DAC channel 1 = PA4 */
TM_DAC_Init(TM_DAC_Channel_1);
/* Init DAC channel 2 = PA5 */
TM_DAC_Init(TM_DAC_Channel_2);
while (1) {
/* Toggle ALL leds */
if (TM_DELAY_Time() > 200) {
/* Toggle leds */
TM_DISCO_LedToggle(LED_ALL);
}
/* Increase channel 1 value */
values[0]++;
/* Decrease channel 2 value */
values[1]--;
/* Check if channel 1 is overflowed 12 bit and set it to zero */
if (values[0] > 0x0FFF) {
values[0] = 0;
}
/* Check if channel 2 is less than zero (overflow to 0xFFFF) and set to to max 12 bit value */
if (values[1] > 0x0FFF) {
values[1] = 0x0FFF;
}
/* Set DAC channel 1 = PA4 */
TM_DAC_SetValue(TM_DAC_Channel_1, values[0]);
/* Set DAC channel 2 = PA5 */
TM_DAC_SetValue(TM_DAC_Channel_2, values[1]);
/* Delay 1ms */
Delayms(1);
}
}
/**
**===========================================================================
**
** Abstract: main program
**
**===========================================================================
*/
int main(void)
{
uint8_t buffer[5] = {0,0,0,0,0};//buffer for received data
uint8_t buffer_size;//size of buffer
uint8_t *buffer_ptr = &buffer[0];
uint8_t buffer_ptr_inc = 0;//buffer pointer incrementer
uint16_t read_voltage;//voltage value read from MATlab*1000
uint16_t DAC_input;//input voltage to DAC function
/*Start up system parameters*/
SystemInit();
/**
* IMPORTANT NOTE!
* The symbol VECT_TAB_SRAM needs to be defined when building the project
* if code has been located to RAM and interrupts are used.
* Otherwise the interrupt table located in flash will be used.
* See also the <system_*.c> file and how the SystemInit() function updates
* SCB->VTOR register.
* E.g. SCB->VTOR = 0x20000000;
*/
/* Initialize DAC channel 1, pin PA4 */
TM_DAC_Init(TM_DAC1);
main_LED_init();
/*Start USB VCP*/
TM_USB_VCP_Init();
/* Infinite loop */
while (1) {
/* USB configured OK, drivers OK */
if (TM_USB_VCP_GetStatus() == TM_USB_VCP_CONNECTED) {
/* Turn on GREEN led */
STM_EVAL_LEDOn(LED3);
/* If something arrived at VCP */
if (TM_USB_VCP_Getc(buffer_ptr+buffer_ptr_inc*sizeof(uint8_t)) == TM_USB_VCP_DATA_OK) {
/* data received over port */
STM_EVAL_LEDOn(LED4);
/*Check to make sure no bad indexing*/
if(buffer_ptr_inc == 0)
{
buffer_size = ascii_to_decimal(buffer_ptr, 1);//
buffer_ptr_inc++;
}
else if(buffer_ptr_inc < (buffer_size))
{
buffer_ptr_inc++;
}
else
{
buffer_ptr_inc=0;
read_voltage = ascii_to_decimal(buffer_ptr+sizeof(uint8_t), buffer_size);/*end of capturing decimal data, convert string to decimal*/
DAC_input = (uint16_t)read_voltage*(4.096/2.633);
/* Set 12bit analog value of 1500/4096 * 2.633V */
TM_DAC_SetValue(TM_DAC1, DAC_input);
TM_USB_VCP_Putc(1);//send data okay to MATlab
}
}
} else {
/* USB not OK */
STM_EVAL_LEDOff(LED3);
STM_EVAL_LEDOff(LED4);
}
}//end of while
return 0;
}