deon/chopstx
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

usart: move to common code.

Browse Source
This commit is contained in:
NIIBE Yutaka
2019-04-26 10:21:29 +09:00
parent 74e52fd7f9
commit e7e6f5b184
3 changed files with 53 additions and 80 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
contrib/usart-stm32f103.c
View File

@@ -141,9 +141,12 @@ static int handle_intr (struct USART *USARTx, struct rb *rb2a, struct usart_stat
static int handle_tx (struct USART *USARTx, struct rb *rb2h, struct usart_stat *stat);
static void usart_config_recv_enable (struct USART *USARTx, int on);
struct brr_setting {
uint8_t baud_spec;
uint32_t brr_value;
};
#define NUM_BAUD (int)(sizeof (brr_table) / sizeof (struct brr_setting))
#include "usart-common.c"
/* We assume 36MHz f_PCLK */
static const struct brr_setting brr_table[] = {
{ B600, (3750 << 4)},
@@ -165,28 +168,8 @@ static const struct brr_setting brr_table[] = {
{ BSCARD20, ( 11 << 4)|10}, /* 193548 */
};
int
usart_config_baud (uint8_t dev_no, uint8_t baud_spec)
{
struct USART *USARTx = get_usart_dev (dev_no);
uint32_t save_bits;
int i;
for (i = 0; i < NUM_BAUD; i++)
if (brr_table[i].baud_spec == baud_spec)
break;
if (i >= NUM_BAUD)
return -1;
save_bits = USARTx->CR1 & (USART_CR1_TE | USART_CR1_RE);
USARTx->CR1 &= ~(USART_CR1_TE | USART_CR1_RE);
USARTx->BRR = brr_table[i].brr_value;
USARTx->CR1 |= save_bits;
return 0;
}
#include "usart-common.c"
static void
usart_config_recv_enable (struct USART *USARTx, int on)
{
@@ -196,17 +179,6 @@ usart_config_recv_enable (struct USART *USARTx, int on)
USARTx->CR1 &= ~USART_CR1_RE;
}
void
usart_config_clken (uint8_t dev_no, int on)
{
struct USART *USARTx = get_usart_dev (dev_no);
if (on)
USARTx->CR2 |= (1 << 11);
else
USARTx->CR2 &= ~(1 << 11);
}
int
usart_config (uint8_t dev_no, uint32_t config_bits)
@@ -214,8 +186,7 @@ usart_config (uint8_t dev_no, uint32_t config_bits)
struct USART *USARTx = get_usart_dev (dev_no);
uint8_t baud_spec = (config_bits & MASK_BAUD);
int i;
uint32_t cr1_config = (USART_CR1_UE | USART_CR1_RXNEIE
| USART_CR1_TE | USART_CR1_RE);
uint32_t cr1_config = (USART_CR1_UE | USART_CR1_RXNEIE | USART_CR1_TE);
/* TXEIE/TCIE will be enabled when
putting char */
/* No CTSIE, PEIE, IDLEIE, LBDIE */
@@ -266,6 +237,9 @@ usart_config (uint8_t dev_no, uint32_t config_bits)
else
USARTx->CR3 = 0;
if (!(config_bits & MASK_MODE))
cr1_config |= USART_CR1_RE;
USARTx->CR1 = cr1_config;
/* SCEN (smartcard enable) should be set _after_ CR1. */