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Improved usart api implementation to be more readable.

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This commit is contained in:
Piotr Esden-Tempski
2010-12-29 05:37:23 +01:00
parent 5e0c463147
commit e5941fb075
2 changed files with 39 additions and 27 deletions
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54
include/libopenstm32/usart.h
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@@ -125,7 +125,7 @@
/* --- USART_DR values ----------------------------------------------------- */
/* USART_DR[8:0]: DR[8:0]: Data value */
#define USART_DR_MASK 0xFF
#define USART_DR_MASK 0x1FF
/* --- USART_BRR values ---------------------------------------------------- */
@@ -178,26 +178,18 @@
/* SBK: Send break */
#define USART_CR1_SBK (1 << 0)
/* CR1_PCE / CR1_PS combined values */
#define USART_PARITY_NONE 0x00
#define USART_PARITY_ODD 0x02
#define USART_PARITY_EVEN 0x03
/* CR1_TE/CR1_RE combined values */
#define USART_MODE_RX 0x01
#define USART_MODE_TX 0x02
#define USART_MODE_TX_RX 0x03
/* --- USART_CR2 values ---------------------------------------------------- */
/* LINEN: LIN mode enable */
#define USART_CR2_LINEN (1 << 14)
/* STOP[13:12]: STOP bits */
#define USART_STOPBITS_1 0x00 /* 1 stop bit */
#define USART_STOPBITS_0_5 0x01 /* 0.5 stop bits */
#define USART_STOPBITS_2 0x02 /* 2 stop bits */
#define USART_STOPBITS_1_5 0x03 /* 1.5 stop bits */
#define USART_CR2_STOPBITS_1 (0x00 << 12) /* 1 stop bit */
#define USART_CR2_STOPBITS_0_5 (0x01 << 12) /* 0.5 stop bits */
#define USART_CR2_STOPBITS_2 (0x02 << 12) /* 2 stop bits */
#define USART_CR2_STOPBITS_1_5 (0x03 << 12) /* 1.5 stop bits */
#define USART_CR2_STOPBITS_MASK (0x03 << 12)
#define USART_CR2_STOPBITS_SHIFT 12
/* CLKEN: Clock enable */
#define USART_CR2_CLKEN (1 << 11)
@@ -262,12 +254,6 @@
/* EIE: Error interrupt enable */
#define USART_CR3_EIE (1 << 0)
/* CR3_CTSE/CR3_RTSE combined values */
#define USART_FLOWCONTROL_NONE 0x00
#define USART_FLOWCONTROL_RTS 0x01
#define USART_FLOWCONTROL_CTS 0x02
#define USART_FLOWCONTROL_RTS_CTS 0x03
/* --- USART_GTPR values --------------------------------------------------- */
/* GT[7:0]: Guard time value */
@@ -280,6 +266,32 @@
/* TODO */ /* Note to Uwe: what needs to be done here? */
/* --- Convenience defines ------------------------------------------------- */
/* CR1_PCE / CR1_PS combined values */
#define USART_PARITY_NONE 0x00
#define USART_PARITY_ODD USART_CR1_PS
#define USART_PARITY_EVEN (USART_CR1_PS | USART_CR1_PCE)
#define USART_PARITY_MASK (USART_CR1_PS | USART_CR1_PCE)
/* CR1_TE/CR1_RE combined values */
#define USART_MODE_RX USART_CR1_RE
#define USART_MODE_TX USART_CR1_TE
#define USART_MODE_TX_RX (USART_CR1_RE | USART_CR1_TE)
#define USART_MODE_MASK (USART_CR1_RE | USART_CR1_TE)
#define USART_STOPBITS_1 USART_CR2_STOPBITS_1 /* 1 stop bit */
#define USART_STOPBITS_0_5 USART_CR2_STOPBITS_0_5 /* 0.5 stop bits */
#define USART_STOPBITS_2 USART_CR2_STOPBITS_2 /* 2 stop bits */
#define USART_STOPBITS_1_5 USART_CR2_STOPBITS_1_5 /* 1.5 stop bits */
/* CR3_CTSE/CR3_RTSE combined values */
#define USART_FLOWCONTROL_NONE 0x00
#define USART_FLOWCONTROL_RTS USART_CR3_RTSE
#define USART_FLOWCONTROL_CTS USART_CR3_CTSE
#define USART_FLOWCONTROL_RTS_CTS (USART_CR3_RTSE | USART_CR3_CTSE)
#define USART_FLOWCONTROL_MASK (USART_CR3_RTSE | USART_CR3_CTSE)
/* --- Function prototypes ------------------------------------------------- */
void usart_set_baudrate(u32 usart, u32 baud);