circuitpython/stm/led.c

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