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bluepill: working on header file

This commit is contained in:
Kyle Isom 2018-03-06 08:07:11 -08:00
parent 0ca0cb6167
commit 4be849722a
1 changed files with 65 additions and 0 deletions
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65
blue-pill/blinky/bluepill.h Normal file
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#ifndef __BLUEPILL_H__
#define __BLUEPILL_H__
#include <stdint.h>
#define PORTA (volatile unsigned int *)0x40010800
#define PORTB (volatile unsigned int *)0x40010c00
#define PORTC (volatile unsigned int *)0x40011000
#define PORTD (volatile unsigned int *)0x40011400
#define PORTE (volatile unsigned int *)0x40011800
#define RCC (volatile unsigned int *)0x40021000
/*
40011000 CRL
40011004 CRH
40011008 IDR
4001100c ODR
40011010 BRR
40011012 LCKR
*/
typedef struct _GPIO {
uint32_t CRL; /* configuration register low */
uint32_t CRH; /* configuration register high */
uint32_t IDR; /* input data register */
uint32_t ODR; /* output data register */
uint32_t BSRR; /* bit set / reset register */
uint16_t BRR; /* reset register */
uint32_t LCKR; /* locking register */
} GPIO;
GPIO *GPIO_A = (GPIO *)PORTA;
GPIO *GPIO_B = (GPIO *)PORTB;
GPIO *GPIO_C = (GPIO *)PORTC;
GPIO *GPIO_D = (GPIO *)PORTD;
GPIO *GPIO_E = (GPIO *)PORTE;
const uint32_t OUTPUT_MAX_2MHZ = 2;
const uint32_t OUTPUT_MAX_10MHZ = 1;
const uint32_t OUTPUT_MAX_50MHZ = 3;
const uint32_t OUTPUT_GPP = 0;
const uint32_t OUTPUT_GOD = 1;
const uint32_t OUTPUT_APP = 2;
const uint32_t OUTPUT_AOD = 3;
void set_pin(GPIO *gpio, uint32_t pin) { gpio->BSRR |= ((1 << pin) << 16); }
void clear_pin(GPIO *gpio, uint32_t pin) { gpio->BSRR |= (1 << pin); }
void output_mode(GPIO *gpio, uint32_t pin, uint32_t mode, uint32_t max) {
if (pin > 7) {
pin = ((pin - 8) * 4);
gpio->CRH |= (max << pin);
gpio->CRH |= (mode << (pin + 2));
}
else {
pin *= 4;
gpio->CRL |= (max << pin);
gpio->CRL |= (mode << (pin + 2));
}
}
#endif /* __BLUEPILL_H__ */