66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
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#ifndef __BLUEPILL_H__
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#define __BLUEPILL_H__
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#include <stdint.h>
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#define PORTA (volatile unsigned int *)0x40010800
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#define PORTB (volatile unsigned int *)0x40010c00
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#define PORTC (volatile unsigned int *)0x40011000
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#define PORTD (volatile unsigned int *)0x40011400
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#define PORTE (volatile unsigned int *)0x40011800
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#define RCC (volatile unsigned int *)0x40021000
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/*
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40011000 CRL
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40011004 CRH
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40011008 IDR
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4001100c ODR
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40011010 BRR
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40011012 LCKR
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*/
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typedef struct _GPIO {
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uint32_t CRL; /* configuration register low */
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uint32_t CRH; /* configuration register high */
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uint32_t IDR; /* input data register */
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uint32_t ODR; /* output data register */
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uint32_t BSRR; /* bit set / reset register */
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uint16_t BRR; /* reset register */
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uint32_t LCKR; /* locking register */
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} GPIO;
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GPIO *GPIO_A = (GPIO *)PORTA;
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GPIO *GPIO_B = (GPIO *)PORTB;
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GPIO *GPIO_C = (GPIO *)PORTC;
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GPIO *GPIO_D = (GPIO *)PORTD;
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GPIO *GPIO_E = (GPIO *)PORTE;
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const uint32_t OUTPUT_MAX_2MHZ = 2;
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const uint32_t OUTPUT_MAX_10MHZ = 1;
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const uint32_t OUTPUT_MAX_50MHZ = 3;
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const uint32_t OUTPUT_GPP = 0;
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const uint32_t OUTPUT_GOD = 1;
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const uint32_t OUTPUT_APP = 2;
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const uint32_t OUTPUT_AOD = 3;
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void set_pin(GPIO *gpio, uint32_t pin) { gpio->BSRR |= ((1 << pin) << 16); }
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void clear_pin(GPIO *gpio, uint32_t pin) { gpio->BSRR |= (1 << pin); }
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void output_mode(GPIO *gpio, uint32_t pin, uint32_t mode, uint32_t max) {
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if (pin > 7) {
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pin = ((pin - 8) * 4);
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gpio->CRH |= (max << pin);
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gpio->CRH |= (mode << (pin + 2));
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}
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else {
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pin *= 4;
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gpio->CRL |= (max << pin);
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gpio->CRL |= (mode << (pin + 2));
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}
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}
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#endif /* __BLUEPILL_H__ */
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