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This commit is contained in:
Philippe Teuwen
2019-06-07 21:40:33 +02:00
parent 5eeb356418
commit a55e597e36
37 changed files with 193 additions and 193 deletions
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8
common/usart.c
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@@ -199,7 +199,7 @@ void usart_init(uint32_t baudrate, uint8_t parity) {
AT91C_US_NBSTOP_1_BIT | // 1 stop bit
AT91C_US_CHMODE_NORMAL; // channel mode: normal
switch(usart_parity) {
switch (usart_parity) {
case 'N':
mode |= AT91C_US_PAR_NONE; // parity: none
break;
@@ -228,12 +228,12 @@ void usart_init(uint32_t baudrate, uint8_t parity) {
// baudrate == selected clock/16/CD
// OVER = 1, -yes we are oversampling
// baudrate == selected clock/8/CD --> this is ours
//
//
uint32_t brgr = 48000000 / (usart_baudrate << 3);
// doing fp = round((mck / (usart_baudrate << 3) - brgr) * 8) with integers:
uint32_t fp = ((16 * 48000000 / (usart_baudrate << 3) - 16 * brgr)+1)/2;
uint32_t fp = ((16 * 48000000 / (usart_baudrate << 3) - 16 * brgr) + 1) / 2;
pUS1->US_BRGR = (fp << 16) | brgr;
pUS1->US_BRGR = (fp << 16) | brgr;
// Write the Timeguard Register
pUS1->US_TTGR = 0;