| 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 configure UART for simulation mode: all UART TX data will be redirected to simulation output. Use this for simulations only!
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* @note The 'UART_SIM_MODE' compiler flag will configure UART for simulation mode: all UART TX data will be redirected to simulation output. Use this for simulations only!
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* @warning To enable simulation mode add <USER_FLAGS+=-DUART_SIM_MODE> when compiling.
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* @note To enable simulation mode add <USER_FLAGS+=-DUART_SIM_MODE> when compiling.
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*
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* @warning The baud rate is computed using INTEGER operations (truncation errors might occur).
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*
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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] parity PArity configuration (00=off, 10=even, 11=odd).
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* @param[in] parity PArity configuration (00=off, 10=even, 11=odd).
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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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| Line 97... |
Line 99... |
clock -= 2*baudrate;
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clock -= 2*baudrate;
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i++;
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i++;
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}
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}
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#endif
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#endif
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// find clock prsc
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// find baud prescaler (12-bit wide))
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while (i >= 0x0fff) {
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while (i >= 0x0fff) {
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if ((p == 2) || (p == 4))
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if ((p == 2) || (p == 4))
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i >>= 3;
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i >>= 3;
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else
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else
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i >>= 1;
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i >>= 1;
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p++;
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p++;
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}
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}
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uint32_t prsc = (uint32_t)p;
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uint32_t clk_prsc = (uint32_t)p;
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prsc = prsc << UART_CT_PRSC0;
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clk_prsc = clk_prsc << UART_CT_PRSC0;
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uint32_t baud = (uint32_t)i;
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uint32_t baud_prsc = (uint32_t)i;
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baud = baud << UART_CT_BAUD00;
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baud_prsc = baud_prsc - 1;
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baud_prsc = baud_prsc << UART_CT_BAUD00;
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uint32_t uart_en = 1;
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uint32_t uart_en = 1;
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uart_en = uart_en << UART_CT_EN;
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uart_en = uart_en << UART_CT_EN;
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uint32_t parity_config = (uint32_t)(parity & 3);
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uint32_t parity_config = (uint32_t)(parity & 3);
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Line 136... |
uint32_t sim_mode = 1 << UART_CT_SIM_MODE;
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uint32_t sim_mode = 1 << UART_CT_SIM_MODE;
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#else
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#else
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uint32_t sim_mode = 0;
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uint32_t sim_mode = 0;
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#endif
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#endif
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UART_CT = prsc | baud | uart_en | parity_config | rx_irq_en | tx_irq_en | sim_mode;
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UART_CT = clk_prsc | baud_prsc | uart_en | parity_config | 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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