uart_reg.h

Go to the documentation of this file.

#ifndef CORTEX_M4_UART_REG_H
#define CORTEX_M4_UART_REG_H
 
#include "common/hal_types.h"
#include <stdint.h>
 
typedef struct {
  __IO uint32_t SR;  
  __IO uint32_t DR;  
  __IO uint32_t BRR; 
  __IO uint32_t CR1; 
  __IO uint32_t
      CR2;            
  __IO uint32_t CR3;  
  __IO uint32_t GTPR; 
} UARTx_Reg_Typedef;
 
#define USART1_BASE 0x40011000
#define USART2_BASE 0x40004400
#define USART6_BASE 0x40011400
 
#define GET_USARTx_BASE(n)                                                      \
  ((UARTx_Reg_Typedef *)(n == 1                                                \
                             ? (USART1_BASE)                                   \
                             : (n == 2 ? (USART2_BASE)                         \
                                       : (n == 6 ? (USART6_BASE) : (NULL)))))
 
 
/* Clock enable bits */
#define RCC_APB1ENR_USART2EN (1 << 17)
#define RCC_APB2ENR_USART1EN (1 << 4)
#define RCC_APB2ENR_USART6EN (1 << 5)
 
 
/* Control register bits */
#define USART_CR1_UE (1 << 13) 
#define USART_CR1_TE (1 << 3)  
#define USART_CR1_RE (1 << 2)  
 
/* Status register bits */
#define USART_SR_TXE (1 << 7)  
#define USART_SR_RXNE (1 << 5) 
 
#endif // !CORTEX_M4_UART_REG_H