riot-ci/RIOT
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Merge pull request #11712 from bergzand/pr/sam0_common/uart_modecfg

Browse Source 
sam0_common: add uart modecfg support
This commit is contained in:
Kevin "Bear Puncher" Weiss 2019-06-21 13:08:07 +02:00 committed by GitHub
commit a290f2d66c
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 58 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
cpu/sam0_common/Makefile.features
View File

@ -3,5 +3,6 @@ FEATURES_PROVIDED += periph_flashpage
FEATURES_PROVIDED += periph_flashpage_raw
FEATURES_PROVIDED += periph_flashpage_rwee
FEATURES_PROVIDED += periph_gpio periph_gpio_irq
FEATURES_PROVIDED += periph_uart_modecfg
-include $(RIOTCPU)/cortexm_common/Makefile.features

16
cpu/sam0_common/include/periph_cpu_common.h
View File

@ -178,6 +178,22 @@ typedef enum {
UART_FLAG_WAKEUP = 0x2, /**< wake from sleep on receive */
} uart_flag_t;
/**
* @brief Available SERCOM UART data size selections
*
* 9 bit UART mode is currently unavailable as it is not supported by the common
* RIOT UART peripheral API.
* @{
*/
#define HAVE_UART_DATA_BITS_T
typedef enum {
UART_DATA_BITS_5 = 0x5, /**< 5 data bits */
UART_DATA_BITS_6 = 0x6, /**< 6 data bits */
UART_DATA_BITS_7 = 0x7, /**< 7 data bits */
UART_DATA_BITS_8 = 0x0, /**< 8 data bits */
} uart_data_bits_t;
/** @} */
/**
* @brief UART device configuration
*/

41
cpu/sam0_common/periph/uart.c
View File

@ -140,6 +140,47 @@ void uart_poweroff(uart_t uart)
sercom_clk_dis(dev(uart));
}
#ifdef MODULE_PERIPH_UART_MODECFG
int uart_mode(uart_t uart, uart_data_bits_t data_bits, uart_parity_t parity,
uart_stop_bits_t stop_bits)
{
if (uart >= UART_NUMOF) {
return UART_NODEV;
}
if (stop_bits != UART_STOP_BITS_1 && stop_bits != UART_STOP_BITS_2) {
return UART_NOMODE;
}
if (parity != UART_PARITY_NONE && parity != UART_PARITY_EVEN &&
parity != UART_PARITY_ODD) {
return UART_NOMODE;
}
/* Disable UART first to remove write protect */
dev(uart)->CTRLA.bit.ENABLE = 0;
while (dev(uart)->SYNCBUSY.bit.ENABLE) {}
dev(uart)->CTRLB.bit.CHSIZE = data_bits;
if (parity == UART_PARITY_NONE) {
dev(uart)->CTRLA.bit.FORM = 0x0;
}
else {
dev(uart)->CTRLA.bit.FORM = 0x1;
dev(uart)->CTRLB.bit.PMODE = (parity == UART_PARITY_ODD) ? 1 : 0;
}
dev(uart)->CTRLB.bit.SBMODE = (stop_bits == UART_STOP_BITS_1) ? 0 : 1;
/* Enable UART again */
dev(uart)->CTRLA.bit.ENABLE = 1;
while (dev(uart)->SYNCBUSY.bit.ENABLE) {}
return UART_OK;
}
#endif
static inline void irq_handler(unsigned uartnum)
{
if (dev(uartnum)->INTFLAG.bit.RXC) {