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Add function to setup UART dynamically on cc13xx/cc26xx devices #2435

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Add function to setup UART dynamically on cc13xx/cc26xx devices #2435

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bb523fe
Add definition of cc26xx_uart_setup function
keyfour Feb 1, 2018
724b79a
Add declaration of cc26xx_uart_setup function
keyfour Feb 1, 2018
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26 changes: 22 additions & 4 deletions cpu/cc26xx-cc13xx/dev/cc26xx-uart.c
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,11 @@
/*---------------------------------------------------------------------------*/
static int (*input_handler)(unsigned char c);
/*---------------------------------------------------------------------------*/
/* UART configurations. Defaults are for 115,200, 8-N-1 operation. */
static uint32_t cc26xx_uart_baudrate = CC26XX_UART_CONF_BAUD_RATE;
static uint32_t cc26xx_uart_config = (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE
| UART_CONFIG_PAR_NONE);
/*---------------------------------------------------------------------------*/
static bool
usable_rx(void)
{
Expand Down Expand Up @@ -173,11 +178,9 @@ configure(void)
ti_lib_ioc_pin_type_uart(UART0_BASE, BOARD_IOID_UART_RX, BOARD_IOID_UART_TX,
BOARD_IOID_UART_CTS, BOARD_IOID_UART_RTS);

/* Configure the UART for 115,200, 8-N-1 operation. */
/* Configure the UART with defined configurations. */
ti_lib_uart_config_set_exp_clk(UART0_BASE, ti_lib_sys_ctrl_clock_get(),
CC26XX_UART_CONF_BAUD_RATE,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
UART_CONFIG_PAR_NONE));
cc26xx_uart_baudrate, cc26xx_uart_config);

/*
* Generate an RX interrupt at FIFO 1/2 full.
Expand Down Expand Up @@ -306,6 +309,21 @@ cc26xx_uart_init()
}
/*---------------------------------------------------------------------------*/
void
cc26xx_uart_setup(uint32_t baudrate, uint32_t config)
{
/* Return early if disabled by user conf or if ports are misconfigured */
if(!usable_rx() && !usable_tx()) {
return;
}

cc26xx_uart_baudrate = baudrate;
cc26xx_uart_config = config;

/* Reconfigure UART with new parameters */
enable();
}
/*---------------------------------------------------------------------------*/
void
cc26xx_uart_write_byte(uint8_t c)
{
/* Return early if disabled by user conf or if ports are misconfigured */
Expand Down
22 changes: 22 additions & 0 deletions cpu/cc26xx-cc13xx/dev/cc26xx-uart.h
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,28 @@
*/
void cc26xx_uart_init();

/**
* \brief Change default UART configurations to custom one
* \param baudrate
* \config UART data format
* This parameter is the bitwise or of three values
* Number of data bits
* - \ref UART_CONFIG_WLEN_8 : 8 data bits per byte.
* - \ref UART_CONFIG_WLEN_7 : 7 data bits per byte.
* - \ref UART_CONFIG_WLEN_6 : 6 data bits per byte.
* - \ref UART_CONFIG_WLEN_5 : 5 data bits per byte.
* - Number of stop bits
* - \ref UART_CONFIG_STOP_ONE : One stop bit.
* - \ref UART_CONFIG_STOP_TWO : Two stop bits.
* - Parity
* - \ref UART_CONFIG_PAR_NONE
* - \ref UART_CONFIG_PAR_EVEN
* - \ref UART_CONFIG_PAR_ODD
* - \ref UART_CONFIG_PAR_ONE
* - \ref UART_CONFIG_PAR_ZERO
*/
void cc26xx_uart_setup(uint32_t baudrate, uint32_t config);

/**
* \brief Sends a single character down the UART
* \param b The character to transmit
Expand Down