Pablo J

Do you discover how Time load value works?? I'm trying to generate a 20 ms interrupt with a Zybo Z7 and I don't know what value I have to choose. Could you help me?? Thanks :)

I'm working in a project with a Zybo Z7-10 and I want to generate a timer interrupt every 20 ms. I did a vivado and vitis project but I don't know what is the correct Timer Load Value to generate this interrupt. Could someone help me? Thanks a lot. PD: This is the project. #include <stdio.h> #include "xparameters.h" #include "xil_printf.h" #include "xgpio.h" #include "xil_types.h" #include "sleep.h" #include "xtmrctr.h" #include "xscugic.h" #include "xil_exception.h" // Get device IDs from xparameters.h #define BTN_ID XPAR_AXI_GPIO_BUTTONS_DEVICE_ID #define LED_ID XPAR_AXI_GPIO_LEDS_DEVICE_ID #define LED_RGB_ID XPAR_AXI_GPIO_RGB_LED_DEVICE_ID #define SW_ID XPAR_AXI_GPIO_SWITHCES_DEVICE_ID #define INTC_DEVICE_ID XPAR_PS7_SCUGIC_0_DEVICE_ID #define TMR_DEVICE_ID XPAR_TMRCTR_0_DEVICE_ID #define INTC_TMR_INTERRUPT_ID XPAR_FABRIC_AXI_TIMER_0_INTERRUPT_INTR #define TMR_LOAD 0x00659F9F #define BTN_CHANNEL 1 #define LED_CHANNEL 1 #define SW_CHANNEL 1 #define LED_RGB_CHANNEL 1 #define BTN_MASK 0b1111 #define LED_MASK 0b0000 #define SW_MASK 0b1111 #define LED_RGB_MASK 0b0000 XScuGic INTCInst; XTmrCtr TMRInst; static void TMR_Intr_Handler(void *baseaddr_p); static int IntcInitFunction(u16 DeviceId, XTmrCtr *TmrInstancePtr); void TMR_Intr_Handler(void *data){ if(XTmrCtr_IsExpired(&TMRInst, 0)){ if(tmr_count == 10){ XTmrCtr_Stop(&TMRInst,0); xil_printf("Interrupcion\r\n"); XTmrCtr_Reset(&TMRInst,0); XTmrCtr_Start(&TMRInst,0); } } int InterruptSystemSetup(XScuGic *XScuGicInstancePtr){ Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT, (Xil_ExceptionHandler) XScuGic_InterruptHandler, XScuGicInstancePtr); Xil_ExceptionEnable(); return XST_SUCCESS; } int IntcInitFunction(u16 DeviceId, XTmrCtr *TmrInstancePtr){ XScuGic_Config *IntcConfig; int status; IntcConfig = XScuGic_LookupConfig(DeviceId); status = XScuGic_CfgInitialize(&INTCInst, IntcConfig, IntcConfig->CpuBaseAddress); if(status != XST_SUCCESS) return XST_FAILURE; status = InterruptSystemSetup(&INTCInst); if(status != XST_SUCCESS) return XST_FAILURE; status = XScuGic_Connect(&INTCInst, INTC_TMR_INTERRUPT_ID, (Xil_ExceptionHandler) TMR_Intr_Handler, (void *) TmrInstancePtr); if(status != XST_SUCCESS) return XST_FAILURE; XScuGic_Enable(&INTCInst, INTC_TMR_INTERRUPT_ID); return XST_SUCCESS; } int main() { XGpio_Config *cfg_ptr; XGpio led_device, btn_device, sw_device, led_rgb_device; u32 data, data1; int status; xil_printf("Entered function main\r\n"); // Initialize LED Device cfg_ptr = XGpio_LookupConfig(LED_ID); XGpio_CfgInitialize(&led_device, cfg_ptr, cfg_ptr->BaseAddress); // Initialize Button Device cfg_ptr = XGpio_LookupConfig(BTN_ID); XGpio_CfgInitialize(&btn_device, cfg_ptr, cfg_ptr->BaseAddress); // Initialize Switch Device cfg_ptr = XGpio_LookupConfig(SW_ID); XGpio_CfgInitialize(&sw_device, cfg_ptr, cfg_ptr->BaseAddress); // Initialize LED RGB Device cfg_ptr = XGpio_LookupConfig(LED_RGB_ID); XGpio_CfgInitialize(&led_rgb_device, cfg_ptr, cfg_ptr->BaseAddress); // Set Button Tristate XGpio_SetDataDirection(&btn_device, BTN_CHANNEL, BTN_MASK); // Set Led Tristate XGpio_SetDataDirection(&led_device, LED_CHANNEL, LED_MASK); // Set Button Tristate XGpio_SetDataDirection(&sw_device, BTN_CHANNEL, SW_MASK); // Set Led Tristate XGpio_SetDataDirection(&led_rgb_device, LED_RGB_CHANNEL, LED_RGB_MASK); status = IntcInitFunction(INTC_DEVICE_ID, &TMRInst); if(status != XST_SUCCESS) return XST_FAILURE; //Setup the timer status = XTmrCtr_Initialize(&TMRInst, TMR_DEVICE_ID); if(status != XST_SUCCESS) return XST_FAILURE; XTmrCtr_SetHandler(&TMRInst, (XTmrCtr_Handler) TMR_Intr_Handler, &TMRInst); XTmrCtr_SetResetValue(&TMRInst, 0, TMR_LOAD); XTmrCtr_SetOptions(&TMRInst, 0, XTC_INT_MODE_OPTION | XTC_AUTO_RELOAD_OPTION); XTmrCtr_Start(&TMRInst,0); xil_printf("Empieza"); while (1) { data = XGpio_DiscreteRead(&btn_device, BTN_CHANNEL); XGpio_DiscreteWrite(&led_device, LED_CHANNEL, data); data1 = XGpio_DiscreteRead(&sw_device, BTN_CHANNEL); XGpio_DiscreteWrite(&led_rgb_device, LED_RGB_CHANNEL, data1); usleep(100000); } }