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cpu/nrf5x: implemented UART TX only mode

This commit is contained in:
Hauke Petersen 2017-02-07 16:17:41 +01:00
parent a2bc7bf8c7
commit b0def58927
1 changed files with 19 additions and 9 deletions
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28
cpu/nrf5x_common/periph/uart.c
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2014-2016 Freie Universität Berlin
* Copyright (C) 2014-2017 Freie Universität Berlin
* 2015 Jan Wagner <mail@jwagner.eu>
*
*
@ -50,14 +50,20 @@ int uart_init(uart_t uart, uint32_t baudrate, uart_rx_cb_t rx_cb, void *arg)
/* power on the UART device */
NRF_UART0->POWER = 1;
#endif
/* reset configuration registers */
NRF_UART0->CONFIG = 0;
/* configure RX/TX pin modes */
/* configure RX pin */
if (rx_cb) {
GPIO_BASE->DIRCLR = (1 << UART_PIN_RX);
NRF_UART0->PSELRXD = UART_PIN_RX;
}
/* configure TX pin */
GPIO_BASE->DIRSET = (1 << UART_PIN_TX);
GPIO_BASE->DIRCLR = (1 << UART_PIN_RX);
/* configure UART pins to use */
NRF_UART0->PSELTXD = UART_PIN_TX;
NRF_UART0->PSELRXD = UART_PIN_RX;
/* enable HW-flow control if defined */
#if UART_HWFLOWCTRL
/* set pin mode for RTS and CTS pins */
@ -127,10 +133,14 @@ int uart_init(uart_t uart, uint32_t baudrate, uart_rx_cb_t rx_cb, void *arg)
NRF_UART0->ENABLE = UART_ENABLE_ENABLE_Enabled;
/* enable TX and RX */
NRF_UART0->TASKS_STARTTX = 1;
NRF_UART0->TASKS_STARTRX = 1;
/* enable global and receiving interrupt */
NVIC_EnableIRQ(UART_IRQN);
NRF_UART0->INTENSET = UART_INTENSET_RXDRDY_Msk;
if (rx_cb) {
NRF_UART0->TASKS_STARTRX = 1;
/* enable global and receiving interrupt */
NVIC_EnableIRQ(UART_IRQN);
NRF_UART0->INTENSET = UART_INTENSET_RXDRDY_Msk;
}
return UART_OK;
}