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| author | Josh Rahm <joshuarahm@gmail.com> | 2018-01-23 23:13:16 -0700 |
|---|---|---|
| committer | Josh Rahm <joshuarahm@gmail.com> | 2018-01-23 23:13:16 -0700 |
| commit | acd8afd83da625d36ef39bc01717f29f3b689952 (patch) | |
| tree | 9ca98e5b0bd66e10e30fd074d55834140637dcaa /usart/include | |
| parent | af0244fb51ccb608440128d0f3303ccce77c14c2 (diff) | |
| download | stm32l4-acd8afd83da625d36ef39bc01717f29f3b689952.tar.gz stm32l4-acd8afd83da625d36ef39bc01717f29f3b689952.tar.bz2 stm32l4-acd8afd83da625d36ef39bc01717f29f3b689952.zip | |
simple uart enabled.
Diffstat (limited to 'usart/include')
| -rw-r--r-- | usart/include/common.h | 12 | ||||
| -rw-r--r-- | usart/include/usart.h | 39 |
2 files changed, 46 insertions, 5 deletions
diff --git a/usart/include/common.h b/usart/include/common.h index d88d82d..9d5c7cd 100644 --- a/usart/include/common.h +++ b/usart/include/common.h @@ -1,6 +1,8 @@ #ifndef COMMON__H #define COMMON__H +#include <stdint.h> + /* Define __IO to be volatile if it's not already. */ #ifndef __IO #define __IO volatile @@ -15,4 +17,14 @@ #define PACKED __attribute__((packed)) #define BIT(n) (1 << (n)) +#define RESERVED_CONCAT_IMPL(x, y) x ## y +#define RESERVED_MACRO_CONCAT(x, y) RESERVED_CONCAT_IMPL(x, y) +#define RESERVED(n) \ + bits_t RESERVED_MACRO_CONCAT(_r, __COUNTER__) :n + +#define RESERVE(type) \ + __IO type RESERVED_MACRO_CONCAT(_r, __COUNTER__) + +typedef uint32_t bits_t; + #endif /* COMMON_H */ diff --git a/usart/include/usart.h b/usart/include/usart.h index ebc5458..257aab6 100644 --- a/usart/include/usart.h +++ b/usart/include/usart.h @@ -18,7 +18,33 @@ typedef enum { typedef struct { /* USART configuration registers 0x04 - 0x0c. */ - uint32_t c_r1; + union { + uint32_t c_r1; + struct { + bits_t ue:1; /* UART enable */ + bits_t uesm:1; /* UART enabled in stop mode. */ + bits_t re:1; /* reciever enabled. */ + bits_t te:1; /* transmitter enabled. */ + bits_t idleie:1; /* Idle interrupt enabled. */ + bits_t rxneie:1; /* RXNEIE RXNE interrupt enable. */ + bits_t tcie:1; + bits_t txeie:1; + bits_t peie:1; + bits_t ps:1; + bits_t pce:1; + bits_t wake:1; + bits_t m0:1; + bits_t mme:1; + bits_t cmie:1; + bits_t over8:1; + bits_t dedt:4; + bits_t deat:4; + bits_t rtoie:1; + bits_t eobie:1; + bits_t m1:1; + bits_t reserved:3; + } PACKED c1_bf; + }; uint32_t c_r2; uint32_t c_r3; @@ -73,10 +99,9 @@ typedef enum { } usart_parity_t; typedef enum { - USART_ENABLE_TX_RX = 0x0d, /* 0b1101 */ - USART_ENABLE_TX = 0x09, /* 0b1001 */ - USART_ENABLE_RX = 0x05, /* 0b0101 */ - USART_ENABLE_DISABLED = 0x00, /* 0b0000 */ + USART_ENABLE_TX = 0x02, + USART_ENABLE_RX = 0x01, + USART_ENABLE_DISABLED = 0x00, } usart_enable_t; void usart_set_parity(__IO usart_t* usart, usart_parity_t parity); @@ -97,6 +122,10 @@ void set_usart2_clock_src(__IO rcc_t* rcc, usart_clk_src_t usart_clk_src); void set_usart2_clock_enabled(__IO rcc_t* rcc, bool enable); +void usart_transmit_bytes( + __IO usart_t* usart, const uint8_t* bytes, uint32_t n); + +void usart_transmit_str(__IO usart_t* usart, const char* str); #endif /* H__USART_ */ |