Alexander Heldt
23 lines
447 B
C
23 lines
447 B
C
#include "rcc.h"
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#include "timer.h"
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void tim4_init(void) {
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// Enable timer
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RCC->APB1ENR |= RCC_APB1ENR_TIM4_ENABLE;
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// Reset timer
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TIM4->CR1 = 0x0000;
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TIM4->CR2 = 0x0000;
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// Set prescaler
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// f_clk = 48MHz -> /48000 = 1KHz counting frequency = 1ms
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TIM4->PSC = (uint16_t) 48000 - 1;
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// Set ARR to maximum value to get 1ms between updates
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TIM4->ARR = (uint16_t) 0xFFFF;
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}
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void tim4_start(void) {
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TIM4->CR1 |= TIM_ENABLE;
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}
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