| Line 69... |
Line 69... |
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/**********************************************************************//**
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/**********************************************************************//**
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* Enable and configure UART.
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* Enable and configure UART.
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*
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*
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* @warning The 'UART_SIM_MODE' compiler flag will redirect all UART TX data to the simulation output. Use this for simulations only!
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*
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* @param[in] baudrate Targeted BAUD rate (e.g. 9600).
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* @param[in] baudrate Targeted BAUD rate (e.g. 9600).
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* @param[in] rx_irq Enable RX interrupt (data received) when 1.
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* @param[in] rx_irq Enable RX interrupt (data received) when 1.
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* @param[in] tx_irq Enable TX interrupt (transmission done) when 1.
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* @param[in] tx_irq Enable TX interrupt (transmission done) when 1.
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**************************************************************************/
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**************************************************************************/
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void neorv32_uart_setup(uint32_t baudrate, uint8_t rx_irq, uint8_t tx_irq) {
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void neorv32_uart_setup(uint32_t baudrate, uint8_t rx_irq, uint8_t tx_irq) {
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| Line 110... |
Line 112... |
rx_irq_en = rx_irq_en << UART_CT_RX_IRQ;
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rx_irq_en = rx_irq_en << UART_CT_RX_IRQ;
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uint32_t tx_irq_en = (uint32_t)(tx_irq & 1);
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uint32_t tx_irq_en = (uint32_t)(tx_irq & 1);
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tx_irq_en = tx_irq_en << UART_CT_TX_IRQ;
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tx_irq_en = tx_irq_en << UART_CT_TX_IRQ;
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UART_CT = prsc | baud | uart_en | rx_irq_en | tx_irq_en;
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/* Enable the UART for SIM mode. */
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/* Only use this for simulation! */
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#ifdef UART_SIM_MODE
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#warning UART_SIM_MODE enabled! Sending all UART.TX to text.io simulation output instead of real UART transmitter. Use this for simulations only!
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uint32_t sim_mode = 1 << UART_CT_SIM_MODE;
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#else
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uint32_t sim_mode = 0;
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#endif
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UART_CT = prsc | baud | uart_en | rx_irq_en | tx_irq_en | sim_mode;
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* Disable UART.
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* Disable UART.
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Line 138... |
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/**********************************************************************//**
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/**********************************************************************//**
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* Send single char via UART.
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* Send single char via UART.
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*
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*
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* @note This function is blocking.
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* @note This function is blocking.
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* @warning The 'DEVNULL_UART_OVERRIDE' compiler user flag will forward all UART TX data to the DEVNULL simulation console output.
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*
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*
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* @param[in] c Char to be send.
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* @param[in] c Char to be send.
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**************************************************************************/
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**************************************************************************/
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void neorv32_uart_putc(char c) {
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void neorv32_uart_putc(char c) {
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#ifdef DEVNULL_UART_OVERRIDE
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#ifdef UART_SIM_MODE
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#warning UART OVERRIDE! Sending all UART.TX data to DEVNULL simulation output instead of UART transmitter. Use this for simulations only!
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UART_DATA = ((uint32_t)c) << UART_DATA_LSB;
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DEVNULL_DATA = (uint32_t)c;
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#else
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#else
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// wait for previous transfer to finish
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// wait for previous transfer to finish
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while ((UART_CT & (1<<UART_CT_TX_BUSY)) != 0);
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while ((UART_CT & (1<<UART_CT_TX_BUSY)) != 0);
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UART_DATA = ((uint32_t)c) << UART_DATA_LSB;
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UART_DATA = ((uint32_t)c) << UART_DATA_LSB;
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#endif
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#endif
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* Check if UART TX is busy.
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* Check if UART TX is busy.
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