48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
#include <stm32f4xx.h>
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#include <stm32f4xx_gpio.h>
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#include "led.h"
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#define PYB_LED_R_PORT (GPIOA)
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#define PYB_LED_R1_PIN (GPIO_Pin_8)
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#define PYB_LED_R2_PIN (GPIO_Pin_10)
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#define PYB_LED_G_PORT (GPIOC)
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#define PYB_LED_G1_PIN (GPIO_Pin_4)
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#define PYB_LED_G2_PIN (GPIO_Pin_5)
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void led_init() {
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// set the output high (so LED is off)
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PYB_LED_R_PORT->BSRRL = PYB_LED_R1_PIN;
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PYB_LED_R_PORT->BSRRL = PYB_LED_R2_PIN;
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PYB_LED_G_PORT->BSRRL = PYB_LED_G1_PIN;
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PYB_LED_G_PORT->BSRRL = PYB_LED_G2_PIN;
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// make them open drain outputs
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.GPIO_Pin = PYB_LED_R1_PIN | PYB_LED_R2_PIN;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_Init(PYB_LED_R_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = PYB_LED_G1_PIN | PYB_LED_G2_PIN;
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GPIO_Init(PYB_LED_G_PORT, &GPIO_InitStructure);
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}
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void led_state(pyb_led_t led, int state) {
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GPIO_TypeDef *port;
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uint32_t pin;
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switch (led) {
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case PYB_LED_R1: port = PYB_LED_R_PORT; pin = PYB_LED_R1_PIN; break;
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case PYB_LED_R2: port = PYB_LED_R_PORT; pin = PYB_LED_R2_PIN; break;
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case PYB_LED_G1: port = PYB_LED_G_PORT; pin = PYB_LED_G1_PIN; break;
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case PYB_LED_G2: port = PYB_LED_G_PORT; pin = PYB_LED_G2_PIN; break;
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default: return;
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}
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if (state == 0) {
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// LED off, output is high
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port->BSRRL = pin;
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} else {
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// LED on, output is low
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port->BSRRH = pin;
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}
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}
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