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chg: add fractional for 921600, 1382400 baudrate
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d983f49652
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2 changed files with 10 additions and 1 deletions
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@ -236,7 +236,13 @@ void usart_init(uint32_t baudrate, uint8_t parity) {
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// OVER = 1, -yes we are oversampling
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// baudrate == selected clock/8/CD --> this is ours
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//
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pUS1->US_BRGR = 48000000 / (usart_baudrate << 3);
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uint32_t fractional = 0;
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if ( baudrate == 921600 )
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fractional = 4;
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else if ( baudrate == 1382400 )
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fractional = 2;
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uint32_t brgr = 48000000 / (usart_baudrate << 3);
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pUS1->US_BRGR = (fractional << 16) | brgr;
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// Write the Timeguard Register
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pUS1->US_TTGR = 0;
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@ -8,6 +8,9 @@
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#define USART_BAUD_RATE 115200
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//#define USART_BAUD_RATE 230400
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//#define USART_BAUD_RATE 460800
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//#define USART_BAUD_RATE 921600
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//#define USART_BAUD_RATE 1382400
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extern uint32_t usart_baudrate;
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#define USART_PARITY 'N'
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extern uint8_t usart_parity;
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