RIOT-OS/RIOT
RIOT-OS/RIOT
1
0
Fork 0
mirror of https://github.com/RIOT-OS/RIOT.git synced 2024-12-29 04:50:03 +01:00
Code Releases Activity

cpu/nrf5x/uart: run STOPTX task after finished tx

Browse Source 
This reduces power consumption for UARTs that are configured in tx-only mode.
This commit is contained in:
Jue 2022-11-22 19:48:56 +01:00
parent 97bc8252d9
commit 3da1faca90
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
cpu/nrf5x_common/periph/uart.c
View File

@ -218,7 +218,6 @@ int uart_init(uart_t uart, uint32_t baudrate, uart_rx_cb_t rx_cb, void *arg)
dev(uart)->ENABLE = UARTE_ENABLE_ENABLE_Enabled;
#else
NRF_UART0->ENABLE = UART_ENABLE_ENABLE_Enabled;
NRF_UART0->TASKS_STARTTX = 1;
#endif
#ifdef MODULE_PERIPH_UART_NONBLOCKING
@ -261,6 +260,7 @@ static void _write_buf(uart_t uart, const uint8_t *data, size_t len)
/* wait for the end of transmission */
if (!IS_USED(MODULE_PERIPH_UART_NONBLOCKING)) {
while (dev(uart)->EVENTS_ENDTX == 0) {}
dev(uart)->TASKS_STOPTX = 1;
}
}
@ -390,7 +390,9 @@ static inline void irq_handler(uart_t uart)
dev(uart)->EVENTS_ENDTX = 0;
dev(uart)->EVENTS_TXSTARTED = 0;
dev(uart)->INTENCLR = UARTE_INTENSET_ENDTX_Msk;
if (!tsrb_empty(&uart_tx_rb[uart])) {
if (tsrb_empty(&uart_tx_rb[uart])) {
dev(uart)->TASKS_STOPTX = 1;
} else {
tx_buf[uart] = tsrb_get_one(&uart_tx_rb[uart]);
_write_buf(uart, &tx_buf[uart], 1);
}
@ -406,6 +408,8 @@ void uart_write(uart_t uart, const uint8_t *data, size_t len)
{
(void)uart;
NRF_UART0->TASKS_STARTTX = 1;
for (size_t i = 0; i < len; i++) {
/* This section of the function is not thread safe:
- another thread may mess up with the uart at the same time.
@ -423,13 +427,14 @@ void uart_write(uart_t uart, const uint8_t *data, size_t len)
/* wait for any transmission to be done */
while (NRF_UART0->EVENTS_TXDRDY == 0) {}
}
NRF_UART0->TASKS_STOPTX = 1;
}
void uart_poweron(uart_t uart)
{
(void)uart;
NRF_UART0->TASKS_STARTTX = 1;
if (isr_ctx.rx_cb) {
NRF_UART0->TASKS_STARTRX = 1;
}
@ -439,7 +444,7 @@ void uart_poweroff(uart_t uart)
{
(void)uart;
NRF_UART0->TASKS_SUSPEND;
NRF_UART0->TASKS_STOPRX = 1;
}
int uart_mode(uart_t uart, uart_data_bits_t data_bits, uart_parity_t parity,